US 5,500,422 AGrant
Benzamide Derivative
Issue Date:1996-03-19
•6 Claims
Abstract
A benzamide derivative represented by the following formula: ##STR1## wherein R.sup.1 represents a hydrogen atom or a lower alkanoyl group; R.sup.2 represents a hydrogen atom or a halogen atom; R.sup.3 represents a lower alkoxy group; R.sup.4 represents a hydrogen atom or a lower alkyl group; R.sup.5 represents a hydrogen atom, a lower alkyl group, or a lower alkoxy group; A represents C.sub.1 -C.sub.7 alkylene group which may optionally be substituted with a lower alkyl group; X represents a methylene group, an oxygen atom, or a sulfur atom; m represents an integer of from 0 to 3; n represents an integer of from 0 to 3; and p represents an integer of from 0 to 2 and a pharmacologically acceptable salt thereof is provided. These compounds are useful since they have gastrointestinal stimulating activity, and a pharmaceutical composition comprising said compound is useful for the treatment of gastrointestinal diseases.
Metadata
Assignee
- Hokuriku Seiyaku Co. Ltd.
Inventors
- Yasuo Ito
- Hideo Kato
- Shingo Yasuda
- Nobuhiko Iwasaki
- Hiroyuki Nishino
- Makoto Takeshita
Application Information
Application Number:US 348808&
Filing Date:1994-11-28
Priority Date:1991-02-15
Art Unit:123
Classifications
IPC:
C07D21136A61K 31445
Field of Search:
546548540544514221;233557;567;146;215610;606;06458.4;169212;227.5;238.8;331;428
Patent Drawings
This patent does not have any drawings.
Description
TECHNICAL FIELD
The present invention relates to novel benzamide derivatives which have excellent gastrointestinal stimulating activity and antiemetic activity and are useful as medicament for the treatment of gastrointestinal diseases. The present invention further relates to a method for preparing said benzamide derivatives and a pharmaceutical composition useful for the treatment of gastrointestinal diseases comprising said benzamide derivative as an active ingredient.
BACKGROUND ART
Since the development of Metoclopramide (The Merck Index, 11th Edition, 6063) as an antiemetic agent and a gastrointestinal prokinetic agent, various substituted benzamide derivatives having antiemetic activity and gastrointestinal stimulating activity have been provided.
For example, The Merck Index (11th edition, 2344) discloses Clebopride which is a benzamide derivative having a piperidine ring and is useful as antiulcer agent. The Merck Index (11th edition, 2318) discloses Cisapride useful as a gastrointestinal prokinetic agent. These drugs are widely used clinically. In addition, Japanese Patent Unexamined Publication No. (Sho)55-92384 discloses that benzamide derivatives substituted with an azabicyclo ring have antiemetic activity and gastrointestinal stimulating activity and that they are useful as an antiemetic agent and a gastrointestinal prokinetic agent.
However, these substituted benzamide derivatives are not sufficiently useful since they do not have stimulating activity on lower digestive tracts such as the large intestine, although they have stimulating activity on upper digestive tracts such as the stomach. Furthermore, these substituted benzamide derivatives are not satisfactory from a safe standpoint since they sometimes cause adverse reactions such as extrapyramidal syndrome or hyperprolactinemia.
Accordingly, an object of the present invention is to provide medicament for the treatment of gastrointestinal diseases having stimulating activity not only on upper digestive tract but on lower digestive tract and reduced side effects.
The inventors of the present invention conducted various studies to achieve the aforementioned object, and found that novel benzamide derivatives of the present invention have stimulating activity both on upper digestive tract and lower digestive tract. The inventors also found that these novel benzamide derivatives have reduced side effects and are useful as medicament for the treatment of gastrointestinal diseases having excellent selectivity. The present invention was achieved on the basis of these findings.
DISCLOSURE OF THE INVENTION
The present invention provides benzamide derivatives represented by the following formula (I): ##STR2## wherein, R.sup.1 represents a hydrogen atom or a lower alkanoyl group; R.sup.2 represents a hydrogen atom or a halogen atom; R.sup.3 represents a lower alkoxy group; R.sup.4 represents a hydrogen atom or a lower alkyl group; R.sup.5 represents a hydrogen atom, a lower alkyl group, or a lower alkoxy group; A represents C.sub.1 -C.sub.7 alkylene group which may optionally be substituted with a lower alkyl group; X represents a methylene group, an oxygen atom, or a sulfur atom; m represents an integer of from 0 to 3; n represents an integer of from 0 to 3; and p represents an integer of from 0 to 2, or pharmacologically acceptable salts thereof. The benzamide derivatives are useful since they have gastrointestinal stimulating activity.
According to another embodiment of the present invention, a method for preparing said benzamide derivatives is provided.
According to yet another embodiment of the present invention, a pharmaceutical composition useful for the treatment of gastrointestinal diseases which comprises said benzamide derivative as an active ingredient. The pharmaceutical composition is useful as, for example, a gastrointestinal prokinetic agent, an antiemetic agent, an agent for the treatment of irritable bowel syndrome, and agent for the treatment of constipation.
BEST MODE FOR CARRING OUT THE INVENTION
In the aforementioned formula (I), a lower alkanoyl group represented by R.sup.1 may be, for example, formyl group, acetyl group, propanoyl group, butyroyl group, or trimethylacetyl group. A halogen atom represented by R.sup.2 may be, for example, a fluorine atom, a chlorine atom, or a bromine atom. A lower alkoxy group represented by R.sup.3 and R.sup.5 may be, for example, methoxy group, ethoxy group, propoxy group, isopropoxy group, butoxy group, isobutoxy group, or tert-butoxy group. A lower alkyl group represented by R.sup.4 and R.sup.5 or a lower alkyl group which may optionally substitute on the alkylene group represented by A may be, for example, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, or tert-butyl group. R.sup.5 and Ph-CONH(CH.sub.2).sub.n -- (wherein Ph represents a substituted phenyl) may substitute at any position of a ring comprising X and N.
Examples of pharmacologically acceptable salts of the benzamide drivatives of the present invention include alkali-addition salts or acid-addition salts. Examples of the alkali-addition salts include, for example, inorganic alkali-addition salts such as, for example, sodium salt, potassium salt, calcium salt, and ammonium salt, and organic base-addition salts such as, for example, ethylenediamine salt, ethanolamine salt, N,N-dialkylethanolamine salt, and triethanolamine salt. Examples of the acid addition salts include, for example, inorganic acid-addition salts such as, for example, hydrochloride, hydrobromide, hydroiodide, sulfate, nitrate, and phosphate, and organic acid-addition salts such as, for example, acetate, maleate, fumarate, citrate, oxalate, tartrate, malate, mandelate, methanesulfonate, p-toluenesulfonate, and 10-camphorsulfonate.
The benzamide derivatives of the present invention represented by the above-described formula (I) may optionally have an asymmetric carbon atom. Each of enact-isomers distinguished by the asymmetric carbon atom, an arbitrary mixture thereof, and racemate, i.e., equimolor mixture thereof, fall within the scope of the present invention. Where the benzamide derivatives of the present invention have more than one asymmetric carbon atoms, each diastereomer and an arbitrary mixture of the diastereomers also fall within the scope of the present invention.
The benzamide derivatives of the present invention may be in any one of possible conformations. For instance, where the compounds of the aforementioned formula (I) wherein p is 1, piperidine, morphorine, or thiamorphorine ring substituted with Ph-CONH(CH.sub.2).sub.n -- group may be in any one of configurations selected from chair form, boat form, or twist-boat form. In the specification, compounds having Ph-CONH(CH.sub.2).sub.n -- group and --(CH.sub.2).sub.m -- cross linking group above the same side of a ring plane comprising X and N are referred to as endo-compounds, and compounds having each of the groups above the opposite sides of the plane are referred to as exo-compounds.
Preferred embodiments of the benzamide derivatives of the present invention include the following compounds:
(1) ethyl exo-[3-(4-acetylamino-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl]acet ate;
(2) ethyl exo-4-[3-(4-acetylamino-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl]bu tyrate;
(3) ethyl endo-[3-(4-acetylamino-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl]ace tate;
(4) ethyl endo-4-[3-(4-acetylamino-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl]b utyrate;
(5) ethyl exo-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]acet ate;
(6) ethyl exo-4-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]bu tyrate;
(7) ethyl endo-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]ace tate;
(8) ethyl endo-3-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]p ropionate;
(9) ethyl endo-4-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]b utyrate;
(10) ethyl endo-5-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]v alerate;
(11) methyl endo-6-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]h exanoate;
(12) methyl endo-7-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]h eptanoate;
(13) methyl endo-8-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]o ctanoate;
(14) ethyl endo-[3-(4-acetylamino-2-ethoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]acet ate;
(15) ethyl endo-4-[3-(4-acetylamino-2-ethoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]bu tyrate;
(16) ethyl exo-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct- 8-yl]acetate;
(17) ethyl exo-4-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oc t-8-yl]butyrate;
(18) ethyl endo-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct -8-yl]acetate;
(19) ethyl endo-4-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]o ct-8-yl]butyrate;
(20) ethyl exo-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non- 9-yl]acetate;
(21) ethyl exo-4-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]no n-9-yl]butyrate;
(22) ethyl endo-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non -9-yl]acetate;
(23) ethyl endo-3-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]n on-9-yl]propionate;
(24) ethyl endo-4-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]n on-9-yl]butyrate;
(25) ethyl endo-5-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]n on-9-yl]valerate;
(26) methyl endo-6-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]n on-9-yl]hexanoate;
(27) methyl endo-7-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]n on-9-yl]heptanoate;
(28) methyl endo-8-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]n on-9-yl]octanoate;
(29) ethyl endo-[3-(4-acetylamino-5-chloro-2-ethoxybenzamido)-9-azabicyclo[3.3.1]non- 9-yl]acetate;
(30) ethyl endo-4-[3-(4-acetylamino-5-chloro-2-ethoxybenzamido)-9-azabicyclo[3.3.1]no n-9-yl]butyrate;
(31) ethyl exo-[3-(4-amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl]a cetate;
(32) ethyl exo-4-[3-(4-amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl ]butyrate;
(33) ethyl endo-[3-(4-amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl] acetate;
(34) ethyl endo-4-[3-(4-amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-y l]butyrate;
(35) ethyl exo-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]a cetate;
(36) ethyl exo-4-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl ]butyrate;
(37) ethyl endo-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl] acetate;
(38) ethyl endo-3-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]propionate;
(39) ethyl endo-2-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]propionate;
(40) ethyl endo-4-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]butyrate;
(41) ethyl endo-5-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]valerate;
(42) ethyl endo-6-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]hexanoate;
(43) methyl endo-7-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]heptanoate;
(44) ethyl endo-8-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]octanoate;
(45) ethyl endo-[3-(4-amino-5-chloro-2-ethoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]a cetate;
(46) ethyl endo-4-[3-(4-amino-5-chloro-2-ethoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl ]butyrate;
(47) ethyl endo-[3-[(4-amino-5-chloro-2-methoxybenzamido)methyl]-9-azabicyclo[3.3.1]n on-9-yl]acetate;
(48) ethyl endo-4-[3-[(4-amino-5-chloro-2-methoxybenzamido)methyl]-9-azabicyclo[3.3.1 ]non-9-yl]butyrate;
(49) ethyl endo-[3-[2-(4-amino-5-chloro-2-methoxybenzamido)ethyl]-9-azabicyclo[3.3.1] non-9-yl]acetate;
(50) ethyl endo-4-[3-[2-(4-amino-5-chloro-2-methoxybenzamido)ethyl]-9-azabicyclo[3.3. 1]non-9-yl]butyrate;
(51) ethyl endo-[3-[3-(4-amino-5-chloro-2-methoxybenzamido)propyl]-9-azabicyclo[3.3.1 ]non-9-yl]acetate;
(52) ethyl endo-4-[3-[3-(4-amino-5-chloro-2-methoxybenzamido)-propyl]-9-azabicyclo[3. 3.1]non-9-yl]butyrate;
(53) exo-[3-(4-amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl]a cetic acid;
(54) exo-4-[3-(4-amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl ]butyric acid;
(55) endo-[3-(4-amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl] acetic acid;
(56) endo-4-[3-(4-amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-y l]butyric acid;
(57) exo-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]a cetic acid;
(58) exo-4-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl ]butyric acid;
(59) endo-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl] acetic acid;
(60) endo-3-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]propionic acid;
(61) endo-2-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]propionic acid;
(62) endo-4-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]butyric acid;
(63) endo-5-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]valeric acid;
(64) endo-6-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]hexanoic acid;
(65) endo-7-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]heptanoic acid;
(66) endo-8-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]octanoic acid;
(67) endo-[3-(4-amino-5-chloro-2-ethoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]a cetic acid;
(68) endo-4-[3-(4-amino-5-chloro-2-ethoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl ]butyric acid;
(69) endo-[3-[(4-amino-5-chloro-2-methoxybenzamido)methyl]-9-azabicyclo[3.3.1]n on-9-yl]acetic acid;
(70) endo-4-[3-[(4-amino-5-chloro-2-methoxybenzamido)methyl]-9-azabicyclo[3.3.1 ]non-9-yl]butyric acid;
(71) endo-[3-[2-(4-amino-5-chloro-2-methoxybenzamido)ethyl]-9-azabicyclo[3.3.1] non-9-yl]acetoc acid;
(72) endo-4-[3-[2-(4-amino-5-chloro-2-methoxybenzamido)ethyl]-9-azabicyclo[3.3. 1]non-9-yl]butyric acid;
(73) endo-[3-[3-(4-amino-5-chloro-2-methoxybenzamido)propyl]-9-azabicyclo[3.3.1 ]non-9-yl]acetic acid;
(74) endo-4-[3-[3-(4-amino-5-chloro-2-methoxybenzamido)propyl]-9-azabicyclo[3.3 .1]non-9-yl]butyric acid;
(75) ethyl [4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]acetate;
(76) ethyl 2-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]propionate;
(77) ethyl 3-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]propionate;
(78) ethyl 4-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]butyrate;
(79) ethyl 5-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]valerate;
(80) methyl 6-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]hexanoate;
(81) ethyl [4-[(4-amino-5-chloro-2-methoxybenzamido)methyl]piperidino]acetate;
(82) ethyl 4-[4-[(4-amino-5-chloro-2-methoxybenzamido)methyl]piperidino]butyrate;
(83) ethyl [4-[2-(4-amino-5-chloro-2-methoxybenzamido)ethyl]piperidino]acetate;
(84) ethyl 4-[4-[2-(4-amino-5-chloro-2-methoxybenzamido)ethyl]piperidino]butyrate;
(85) ethyl [4-[3-(4-amino-5-chloro-2-methoxybenzamido)propyl]piperidino]acetate;
(86) ethyl 4-[4-[3-(4-amino-5-chloro-2-methoxybenzamido)propyl]piperidino]butyrate;
(87) [4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]acetic acid;
(88) 2-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]propionic acid;
(89) 3-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]propionic acid;
(90) 4-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]butyric acid;
(91) 5-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]valeric acid;
(92) 6-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]hexanoic acid;
(93) [4-[(4-amino-5-chloro-2-methoxybenzamido)methyl]piperidino]acetic acid;
(94) 4-[4-[(4-amino-5-chloro-2-methoxybenzamido)methyl]piperidino]butyric acid;
(95) [4-[2-(4-amino-5-chloro-2-methoxybenzamido)ethyl]piperidino]acetic acid;
(96) 4-[4-[2-(4-amino-5-chloro-2-methoxybenzamido)ethyl]piperidino]butyric acid;
(97) [4-[3-(4-amino-5-chloro-2-methoxybenzamido)propyl]piperidino]acetic acid;
(98) 4-[4-[3-(4-amino-5-chloro-2-methoxybenzamido)propyl]piperidino]butyric acid;
(99) ethyl cis-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]acetate;
(100) ethyl trans-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]acetate ;
(101) ethyl cis-4-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]butyrat e;
(102) ethyl trans-4-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]butyr ate;
(103) methyl cis-6-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]hexanoa te;
(104) ethyl cis-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methylpiperidino]acetate;
(105) ethyl trans-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methylpiperidino]acetate;
(106) ethyl cis-4-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methylpiperidino]butyrate ;
(107) ethyl trans-4-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methylpiperidino]butyra te;
(108) methyl cis-6-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methylpiperidino]hexanoat e;
(109) cis-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]acetic acid;
(110) trans-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]acetic acid;
(111) cis-4-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]butyric acid;
(112) trans-4-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]butyr ic acid;
(113) cis-6-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]hexanoi c acid;
(114) cis-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methylpiperidino]butyric acid;
(115) trans-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methylpiperidino]acetic acid;
(116) cis-4-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methylpiperidino]butyric acid;
(117) trans-4-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methylpiperidino]butyri c acid;
(118) cis-6-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methylpiperidino]hexanoic acid;
(119) ethyl [2-[(4-amino-5-chloro-2-methoxybenzamido)-methyl]morpholino]acetate;
(120) ethyl 4-[2-[(4-amino-5-chloro-2-methoxybenzamido)-methyl]morpholino]butyrate;
(121) [2-[(4-amino-5-chloro-2-methoxybenzamido)methyl]-morpholino]acetic acid;
(122) 4-[2-[(4-amino-5-chloro-2-methoxybenzamido)methyl]-morpholino]butyric acid;
(123) ethyl [2-[(4-amino-5-chloro-2-methoxybenzamido)-methyl]thiamorpholino]acetate;
(124) ethyl 4-[2[(4-amino-5-chloro-2-methoxybenzamido)-methyl]thiamorpholino]butyrate;
(125) [2-[(4-amino-5-chloro-2-methoxybenzamido)methyl]thiamorpholino]acetic acid;
(126) 4-[2-[(4-amino-5-chloro-2-methoxybenzamido)methyl]thiamorpholino]butyric acid;
(127) ethyl [3-[(4-amino-5-chloro-2-methoxybenzamido)-methyl]pyrrolidin-1-yl]acetate;
(128) ethyl 4-[3-[(4-amino-5-chloro-2-methoxybenzamido)-methyl]pyrrolidin-1-yl]butyrat e;
(129) [3-[(4-amino-5-chloro-2-methoxybenzamido)methyl]pyrrolidin-1-yl]acetic aci d;
(130) 4-[3-[(4-amino-5-chloro-2-methoxybenzamido)methyl]pyrrolidin-1-yl]butyric acid;
(131) ethyl [3-(4-amino-5-chloro-2-methoxybenzamido)pyrrolidin-1-yl]acetate;
(132) ethyl 4-[3-(4-amino-5-chloro-2-methoxybenzamido)pyrrolidin-1-yl]butyrate;
(133) [3-(4-amino-5-chloro-2-methoxybenzamido)pyrrolidin-1-yl]acetic acid; and
(134) 4-[3-(4-amino-5-chloro-2-methoxybenzamido)pyrrolidin-1-yl]butyric acid. However, the present invention is not limited to these examples.
The benzamide derivative represented by formula (I) can be prepared according to a method described below which is an embodiment of the present invention. However, methods for preparing said compound are not limited to these processes.
A process for preparing the benzamide derivatives of the present invention represented by formula (I) comprises the following steps:
(a) reacting a compound represented by the following formula (II) wherein R.sup.1, R.sup.2, R.sup.3, R.sup.5, X, m, n and p are the same as those defined above: ##STR3## with a compound represented by the following formula (III) wherein A is the same as that defined above, , R.sup.6 represents a lower alkyl and Y represents a halogen atom:
to carry out N-alkylation reaction in an organic solvent or without a solvent and in the presence or absence of a base as a dehydrohalogenating agent; and
(b) halogenating or hydrolyzing the product obtained in the above step (a), if desired.
Examples of the organic solvent used for the N-alkylation in the method of the present invention include, for example, alcohols such as, for example, methanol, ethanol, n-propanol, isopropanol, and n-butanol; aromatic hydrocarbons such as, for example, benzene, toluene, and xylene; and aprotic polar solvents such as, for example, tetrahydrofuran, 1,4-dioxane, acetonitrile, N,N-dimethylformamide, N-methyl-2-pyrrolidone, and dimethyl sulfoxide. Examples of the base used include, for example, metallic sodium, sodium hydride, sodium methoxide, sodium ethoxide, sodium amide, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium hydrogen carbonate, and potassium hydrogen carbonate. The reaction may be carried out at from ice-cooling temperature to refluxing temperature of a solvent.
Halogenation may be carried out by the treatment with a halogenating agent in an organic solvent. Examples of the halogenating agent used include, for example, chlorine, bromine, and sulfuryl chloride. Examples of the organic solvent used include, for example, alcohols such as, for example, methanol, ethanol, and n-propanol; halogenated hydrocarbons such as, for example, dichloromethane, chloroform, carbon tetrachloride, and 1,2-dichloroethane; and aliphatic acids such as, for example, acetic acid. The reaction may be carried out at from -30.degree. to refluxing temperature of a solvent.
Hydrolysis may be carried out by using an acid or a base. For acidic hydrolysis, acids such as hydrochloric acid or sulfric acid may be used, and for alkaline hydrolysis, bases such as sodium hydroxide, potassium hydroxide, sodium carbonate, or potassium carbonate may be used. These acids and bases may be used in the reaction in a form of aqueous solution, or alternatively, solutions in methanol, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, or tert-butanol, or solutions in aqueous organic solvents. The reaction may be carried out at from ice-cooling temperature to refluxing temperature of a solvent.
The compounds represented by formula (II) used as starting materials in the aforementioned preparation process of the present invention are novel compounds with a few exceptions. The compounds can be prepared according to the scheme set out below, in which R.sup.1, R.sup.2, R.sup.3, R.sup.5, X, m, n, and p are the same as those defined above, R.sup.7 represents a lower alkyl group, and Z represents a halogen atom. Specific examples of the preparation process are given as reference examples in Examples which follows. ##STR4##
The benzamide derivatives represented by formula (I) prepared according to the process described above and their pharmacologically acceptable salts have hyderfunctional activity on digestive tract and are useful for the treatment of gastrointestinal diseases. The compounds may preferably be formulated in a pharmaceutical composition as an active ingredient. The pharmaceutical composition comprising said compound as an active ingredient may generally be formulated and administered to a patient as orally available compositions such as, for example, capsules, tablets, subtilized granules, granules, powder or syrup, or administered as injection, suppository, eye drop, eye ointment, ear drop, or topical composition.
These pharmaceutical compositions can be prepared by ordinary methods. If necessary, pharmacologically and pharmaceutically acceptable additives may be added. For the preparation of orally available compositions and suppository, excipients such as, for example, lactose, D-mannitol, cornstarch, or crystalline cellulose; disintegrants such as, for example, carboxymethylcellulose or calcium carboxymethylcellulose; binders such as, for example, hydroxypropylcellulose, hydroxypropylmethylcellulose, or polyvinylpyrrolidone; lubricants such as, for example, magnesium stearate or talc; coating agents such as, for example, hydroxypropylmethylcellulose, sucrose, or titanium oxide; or bases such as, for example polyethylene glycol or hard fat may be used as pharmaceutical additives. For the preparation of an injection, eye drop, or ear drop, solubilizing agents or solubilizers such as, for example, distilled water for injection, saline, or propylene glycol which is useful for an aqueous composition or a composition for preparing aqueous solution before use; pH adjusting agents such as, for example, an inorganic or organic acid or base; isotonicity agents such as, for example, sodium chloride, glucose, or glycerin; or stabilizers may be used as pharmaceutical additives. For the preparation of eye ointment and topical composition, suitable pharmaceutical additives ordinarily formulated in ointment, cream, or cataplasms such as white vaseline, macrogol, glycerin, or cloth may be used.
The pharmaceutical compositions of the present invention may be administered orally to an adult patient at a daily dose of about 0.1 to 500 mg. The dose may be increased or decreased depending on the age or conditions of a patient.
As an example demonstrating remarkable advantageous effects of the compounds of the present invention, experimental results are set out below relating to effects on motility of digestive tract of a conscious dog.
Effects on gastrointestinal motility in conscious dog
Under systemical anesthesia, force transducers were chronically implanted to the stomach and the colon of the adult male or female dogs in a direction to measure circular muscle contraction according to the method of Ito et al. (Japanese Journal of Smooth Muscle Research, 13, 33, 1976). A silicone tube chronically attached into jugular vein for intravenous administration of test compounds. After the animal was recovered from the operation, test compounds were administered at about two hours after feeding while gastrointestinal motility was measured. The gastrointestinal motility was indicated as motor index, and the effects of test compounds were estimated by the change of motor index for twenty minutes before and after the administration. The results are summarized in Table 1. It can be concluded that the compounds of the present invention exhibit excellent stimulating effects on lower digestive tracts as well as upper digestive tracts.
The present invention will be explained by way of reference examples and examples. However, the present invention is not limited to these examples.
EXAMPLES
Reference Example 1
endo-4-Acetylamino-N-(9-azabicyclo[3.3.1]non-3-yl)-2-methoxybenzamide
(1) endo-4-Acetylamino-N-(9-benzyl-9-azabicyclo[3.3.1]non-3-yl)-2-methoxybenza mide
To a mixture of 11.0 g of 4-acetylamino-2-methoxybenzoic acid, 8.5 ml of triethylamine, and 210 ml of tetrahydrofuran, 5.3 ml of ethyl chloroformate was added dropwise with stirring under ice-cooling. After the mixture was stirred for 1.5 hours under ice-cooling, 12.72 g of endo-9-benzyl-9-azabicyclo[3.3.1]nonan-3-amine was added by portions. Stirring was continued for 2.5 days at room temperature, and then the mixture was concentrated under reduced pressure. Water was added to the residue, and pH was adjusted to 9 using 10% aqueous potassium carbonate solution. Crystals precipitated were collected by filtration and washed with water and then with ethanol to give 15.7 g of colorless crystals. Recrystallization from methanol gave colorless needles, m.p. 233.5.degree.-235.degree. C.
Anal. C.sub.25 H.sub.31 N.sub.3 O.sub.3 Calcd. C: 71.23; H: 7.41; N: 9.97 Found C: 71.19; H: 7.50; N: 9.93
(2) endo-4-Acetylamino-N-(9-azabicyclo[3.3.1]non-3-yl)-2-methoxybenzamide
To a mixture of 15.5 g of endo-4-acetylamino-N-(9-benzyl-9-azabicyclo[3.3.1]non-3-yl)-2-methoxybenza mide, 20 ml of acetic acid, and 180 ml of methanol, 2.0 g of Pearlman's catalyst (20% palladium hydroxide on carbon) was added, and then hydrogenolysis was carried out for 1 hour at room temperature under ordinary pressure. The catalyst was removed and the filtrate was concentrated under reduced pressure. The residue was taken up in water and pH was adjusted to 9 by adding potassium carbonate. Crystals precipitated were collected by filtration and washed with water to give 12.6 g of pale yellow crystals. Recrystallization from 1,2-dichloroethane gave colorless prisms, m.p. 196.degree.-200.degree. C.
Anal. C.sub.18 H.sub.25 N.sub.3 O.sub.3.1/4H.sub.2 O Calcd. C: 64.36; H: 7.65; N: 12.51 Found C: 64.32; H: 7.53; N: 12.47
In the same manner as Reference Example 1, the compounds of Reference Examples 2-4 were obtained.
Reference Example 2
exo-4-Acetylamino-N-(8-azabicyclo[3.2.1]oct-3-yl)-2-methoxybenzamide fumarate
(1) exo-4-Acetylamino-N-(8-benzyl-8-azabicyclo[3.2.1]oct-3-yl)-2-methoxybenzam ide
Appearance: pale brown needles (MeOH)
IR Spectrum .nu. (KBr) cm.sup.-1 : 1694, 1668
NMR Spectrum .delta. (DMSO-d.sub.6) ppm: 1.50-1.83(6H,m), 1.88-2.14(2H,m), 2.06(3H,s), 3.05-3.32(2H,m), 3.55(2H,s), 3.85(3H,s), 4.05-4.29(1H,m), 7.10-7.45(5H,m) , 7.17(1H,dd,J=8.6,1.7 Hz), 7.48 (1H,d,J=1.7 Hz), 7.62-7.77(1H,m), 7.70(1H,d,J=8.6 Hz), 10.04(1H,s)
Mass Spectrum m/z: 407 (M.sup.+)
(2) exo-4-Acetylamino-N-(8-azabicyclo[3.2.1]oct-3-yl)-2-methoxybenzamide fumarate
Appearance: colorless crystals (MeOH)
m.p. 223.degree.-225.degree. C. (decomp.)
Anal. C.sub.17 H.sub.23 N.sub.3 O.sub.3.C.sub.4 H.sub.4 O.sub.4 Calcd. C: 58.19; H: 6.28; N: 9.69 Found C: 58.05;.H: 6.45; N: 9.71
Reference Example 3
exo-4-Acetylamino-N-(9-azabicyclo [3.3.1]non-3-yl)-2-methoxybenzamide fumarate
(1) exo-4-Acetylamino-N-(9-benzyl-9-azabicyclo[3.3.1]non-3-yl ) -2-methoxybenzamide
Appearance: slightly brown needles (MeOH)
m.p. 215.degree.-216.degree. C. Anal. C.sub.25 H.sub.31 N.sub.3 O.sub.3 Calcd. C: 71.23; H: 7.41; N: 9.97 Found C: 71.12; H: 7.48; N: 9.89
(2) exo-4-Acetylamino-N-(9-azabicyclo[3.3.1]non-3-yl)-2-methoxybenzamide fumarate
Appearance: colorless crystals (MeOH)
m.p. 194.degree.-196.degree. (decomp.)
Anal. C.sub.18 H.sub.25 N.sub.3 O.sub.3.C.sub.4 H.sub.4 O.sub.4.3/4H.sub.2 O Calcd. C: 57.32; H: 6.67; N: 9.12 Found C: 57.13; H: 6.58; N: 9.12
Reference Example 4
endo-4-Acetylamino-N-(9-azabicyclo[3.3.1]non-3-yl)-2-ethoxybenzamide
(1) endo-4-Acetylamino-N-(9-benzyl-9-azabicyclo[3.3.1]non-3-yl)-2-ethoxybenzam ide
Appearance: colorless needles (MeOH)
m.p. 215.degree.-216.degree. C.
Anal. C.sub.26 H.sub.33 N.sub.3 O.sub.3 Calcd. C: 71.70;.H: 7.64; N: 9.65 Found C: 71.45; H: 7.61; N: 9.47
(2) endo-4-Acetylamino-N-(9-azabicyclo[3.3.1]non-3-yl)-2-ethoxybenzamide
Appearance: colorless needles (H.sub.2 O)
m.p. 116.degree.-119.degree. C.
224.degree.-226.degree. C.
Anal. C.sub.19 H.sub.27 N.sub.3 O.sub.3.5/2H.sub.2 O Calcd. C: 58.44; H: 8.26; N: 10.76 Found C: 58.45; H: 7.86; N: 10.40
Reference Example 5
endo-4-Acetylamino-N-(8-azabicyclo[3.2.1]oct-3-yl)-5-chloro-2-methoxybenzam ide
(1) endo-4-Acetylamino-5-chloro-2-methoxy-N-(8-methyl-8-azabicyclo[3.2.1]oct-3 -yl)benzamide
To a mixture of 38.0 g of 4-acetylamino-5-chloro-2-methoxybenzoic acid, 26.1 ml of triethylamine, and 500 ml of tetrahydrofuran, 15.7 ml of ethyl chloroformate was added dropwise with stirring under ice-cooling. Stirring was continued for 1 hour under ice-cooling, and then a solution of 23.0 g of endo-8-methyl-8-azabicyclo[3.2.1]octan-3-amine in 40 ml of tetrahydrofuran was added dropwise. Stirring was continued for 1.5 hours at room temperature, and then insoluble materials were removed and the filtrate obtained was concentrated under reduced pressure. Water was added to the residue and pH was adjusted to 9 by using aqueous potassium carbonate solution. Crystals precipitated were collected by filtration and Washed with water and then with ethyl acetate to give 48.6 g of slightly yellow crystals.
(2) Methyl endo-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct -8-yl]formate
To a mixture of 40.0 g of endo-4-acetylamino-5-chloro-2-methoxy-N-(8-methyl-8-azabicyclo[3.2.1]oct-3 -yl)benzamide, 16.0 g of potassium carbonate, and 400 ml of chloroform, 80.0 ml of methyl chloroformate was added dropwise with stirring at room temperature. The mixture was refluxed for 19 hours, and then insoluble materials were removed and the filtrate obtained was concentrated under reduced pressure. The residue was washed with ethyl acetate and then with hot methanol to give 17.5 g of colorless crystals. Recrystallization from dichloromethane-methanol gave colorless needles, m.p. 250.degree.-252.degree. C.
Anal. C.sub.19 H.sub.24 ClN.sub.3 O.sub.5.1/2H.sub.2 O Calcd. C: 54.48; H: 6.02; N: 10.03 Found C: 54.17; H: 5.77; N: 9.79
(3) endo-4-Acetylamino-N-(8-azabicyclo[3.2.1]oct-3-yl)-5-chloro-2-methoxybenza mide
To a suspension of 16.3 g of methyl endo-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct -8-yl]formate in 400 ml of dichloromethane, 22.0 ml of iodo trimethylsilane was added dropwise with stirring at room temperature. Stirring was continued for 6 hours at room temperature, and then aqueous sodium hydrosulfite solution was added. Aqueous layer was separated after pH was adjusted to 2 using 10% hydrochloric acid. The aqueous layer was basified using potassium carbonate and then extracted with dichloromethane. The extract was dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified using column chromatography on aluminum oxide [eluent: dichloromethane.fwdarw. dichloromethane-methanol (50:1)]to afford 8.41 g of pale yellow syrup.
IR Spectrum .nu. (liq) cm.sup.-1 : 1694, 1644
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.65-2.30(9H,m), 2.28(3H,s), 3.60-3.74(2H,m), 4.02(3H,s), 4.30-4.46(1H,m), 7.82(1H,br-s), 8.21(1H,s), 8.34(1H,s), 8.40-8.50(1H,m)
High Resolution Mass Spectrum: C.sub.17 H.sub.22 ClN.sub.3 O.sub.3 Calcd. m/z: 351.1350, 353.1320 Found m/z: 351.1363, 353.1325
In the same manner as Reference Example 5, the compound of Reference Example 6 was obtained.
Reference Example 6
endo-4-Acetylamino-N-(9-azabicyclo[3.3.1]non-3-yl)-5-chloro-2-methoxybenzam ide
(1) endo-4-Acetylamino-5-chloro-2-methoxy-N-(9-methyl-9-azabicyclo[3.3.1]non-3 -yl)benzamide
Appearance: slightly brown amorphous solid
IR Spectrum .nu. (KBr) cm.sup.-1 : 1706, 1646
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.00-1.15(2H,m), 1.20-1.40(2H,m), 1.45-1.60(1H,m), 1.85-2.10(3H,m), 2.28(3H,s), 2.40-2.75(2H,m), 2.50(3H,s), 3.00-3.15(2H,m), 3.98(3H,s), 4.35-4.60(1H,m), 7.60-7.70(1H,m), 7.82(1H,br-s), 8.21(1H,s), 8.30(1H,s)
High Resolution Mass Spectrum: C.sub.19 H.sub.26 ClN.sub.3 O.sub.3 Calcd. m/z: 379.1663, 381.1633 Found m/z: 379.1654, 381.1630
(2) Methyl endo-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non -9-yl)formate
Appearance: colorless crystals (AcOEt)
m.p. 202.degree.-205.degree. C.
Anal. C.sub.20 H.sub.26 ClN.sub.3 O.sub.5 Calcd. C: 56.67; H: 6.18; N: 9.91 Found C: 56.49; H: 6.25; N: 9.69
(3) endo-4-Acetylamino-N-(9-azabicyclo[3.3.1]non-3-yl)-5-chloro-2-methoxybenza mide
Appearance: pale yellow syrup
IR Spectrum .nu. (liq) cm.sup.-1 : 1694, 1646
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.14-2.00(8H,m), 2.18(1H,br-s), 2.28(3H,s), 2.20-2.40(2H,m), 3.30-3.47(2H,m), 3.99(3H,s), 4.06-4.28(1H,m), 7.57-7.70(1H,m), 7.81(1H,br-s), 8.22(1H,s), 8.32(1H,s)
High Resolution Mass Spectrum: C.sub.18 H.sub.2 4 ClN.sub.3 O.sub.3 Calcd. m/z: 365.1506, 367.1477 Found m/z: 365.1510, 367.1457
Reference Example 7
endo-4-Amino-N-(8-azabicyclo[3.2.1]oct-3-yl)-5-chloro-2-methoxybenzamide hydrochloride
To a solution of 7.86 g of endo-4-acetylamino-N-(8-azabicyclo[3.2.1]oct-3-yl)-5-chloro-2-methoxybenza mide in 23 ml of ethanol, 40 ml of 32% hydrogen chloride/ethanol solution was added and then the mixture was refluxed for 5.5 hours. The reaction mixture was concentrated under reduced pressure, and the residue was washed with ethanol to give 5.05 g of pale brown crystals. Recrysttallization from methanol gave colorless needles, m.p. 280.degree.-282.degree. C. (decomp.).
Anal. C.sub.15 H.sub.20 ClN.sub.3 O.sub.2.HCl.3/4H.sub.2 O Calcd. C: 50.08; H: 6.30; N: 11.68 Found C: 50.07; H: 6.20; N: 11.57
In the same manner as Reference Example 7, the compound of Reference Example 8 was obtained.
Reference Example 8
endo-4-Amino-N-(9-azabicyclo[3.3.1]non-3-yl)-5-chloro-2-methoxybenzamide hydrochloride
Appearance: slightly brown needles (EtOH)
m.p. 257.degree.-261.degree. C. (decomp.)
Anal. C.sub.16 H.sub.22 ClN.sub.3 O.sub.2.HCl.H.sub.2 O Calcd. C: 50.80; H: 6.66; N: 11.11 Found C: 50.74; H: 6.57; N: 10.91
Reference Example 9
4-Amino-5-chloro-2-methoxy-N-(4-piperidinyl)benzamide hydrochloride
(1) 4-Amino-5-chloro-2-methoxy-N-(1-triphenylmethyl-4-piperidinyl)benzamide
To a mixture of 16.40 g of 4-amino-5-chloro-2-methoxybenzoic acid, 13.60 ml of triethylamine, and 330 ml of dry tetrahydrofuran, 8.55 ml of ethyl chloroformate was added with stirring under ice-cooling. Stirring was continued for 2 hours under ice-cooling, 30.64 g of 4-amino-1-triphenylmethylpiperidine was added by portions. After stirring was continued for 20 hours at room temperature, insoluble materials were removed and the filtrate obtained was concentrated under reduced pressure. The residue was dissolved in dichloromethane and washed with water. The solution was dried over anhydrous sodium sulfate and then concentrated under reduced pressure. The residue was washed with n-hexane to give 39.42 g of colorless crystals.
IR Spectrum .nu. (KBr) cm.sup.-1 : 1646, 1624
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.57-1.81(2H,m), 1.92-2.19(2H,m), 2.73-3.38(2H,m), 3.58-4.08(3H,m), 4.33(2H,br-s), 6.25(1H,s), 7.05-7.55(15H,m), 7.67(1H,br-s), 8.06(1H,s)
(2) 4-Amino-5-chloro-2-methoxy-N-(4-piperidinyl)benzamide hydrochloride
A mixture of 39.42 g of 4-amino-5-chloro-2-methoxy-N-(1-triphenylmethyl-4-piperidinyl)benzamide, 10 ml of concentrated hydrochloric acid, and 600 ml of acetone was refluxed for 40 minutes. After the mixture was cooled to 5.degree. C., crystals precipitated were collected by filtration and washed with acetone to give 25.79 g of colorless crystals, m.p. 165.degree.-168.degree. C.
IR Spectrum .nu. (KBr) cm.sup.-1 : 2948, 2812, 1640
NMR Spectrum .delta. (DMSO-d.sub.6) ppm: 1.63-1.85(2H,m), 1.92-2.13(2H,m), 2.88-3.09(2H,m), 3.13-3.33(2H,m), 3.83(3H,s), 3.88-4.07(1H,m), 6.53(1H,s), 7.62(1H,s), 7.66-7.79(1H,m)
Mass Spectrum m/z: 283, 285 (3:1) [M.sup.+ (free base)]
In the same manner as Reference Example 9, the compounds of Reference Examples 10 and 11 were obtained.
Reference Example 10
4-Amino-5-chloro-2-methoxy-N-[(2-morpholinyl)-methyl]benzamide hydrochloride
(1) 4-Amino-5-chloro-2-methoxy-N-[(4-triphenylmethyl-2-morpholinyl)-methyl]ben zamide
Appearance: slightly brown crystals
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.35-1.80(2H,m), 2.80-3.10(2H,m), 3.10-3.35(1H,m), 3.50-3.75(1H,m), 3.71(3H,s), 3.75-4.10(3H,m), 4.35(2H,br-s), 6.23(1H,s), 7.05-7.60(15H,m), 7.80-7.90(1H,m), 8.07(1H,s)
(2) 4-Amino-5-chloro-2-methoxy-N-[(2-morpholinyl)methyl]benzamide hydrochloride
Appearance: slightly brown crystals (H.sub.2 O)
m.p. 219.degree.-222.degree. C.
Anal. C.sub.13 H.sub.18 ClN.sub.3 O.sub.3.HCl.H.sub.2 O Calcd. C: 44.08; H: 5.98;IN: 11.86 Found C: 44.20; H: 5.88; N: 11.82
Reference Example 11
4-Amino-5-chloro-2-methoxy-N-[(3-pyrrolidinyl)methyl]benzamide hydrochloride
(1) 4-Amino-5-chloro-2-methoxy-N-[(1-triphenylmethyl-3pyrrolidinyl)methyl]benz amide
Appearance: slightly brown crystals
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.33-1.50(1H,m), 1.50-1.65(1H,m), 1.76-1.96(1H,m), 2.10-2.40(3H,m), 2.46-2.50(1H,m), 3.30-3.60(2H,m), 3.77(3H,s), 4.35(2H,br-s), 6.26(1H,s), 7.05-7.60(15H,m), 7.60-7.75(1H,m), 8.10(1H,s)
(2) 4-Amino-5-chloro-2-methoxy-N-[(3-pyrrolidinyl)methyl]benzamide hydrochloride
Appearance: pale yellow crystals (H.sub.2 O)
m.p. 204.degree.-206.degree. C.
Anal. C.sub.13 H.sub. ClN.sub.3 O.sub.2.HCl.5/4H.sub.2 O Calcd. C: 45.56; H: 6.32; N: 12.26 Found C: 45.60; H: 6.14; N: 12.30
Reference Example 12
cis-4-Amino-5-chloro-2-methoxy-N-[(3-methoxy-4-piperidinyl)benzamide
(1) Ethyl cis-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]formate
To a mixture of 33.3 g of 4-amino-5-chloro-3-methoxybenzoic acid, 27.0 ml of triethylamine, and 450 ml of tetrahydrofuran, 16.2 ml of ethyl chloroformate was added dropwise with stirring under ice-cooling. Stirring was continued for 1.5 hours under ice-cooling, a solution of 35.0 g of ethyl cis-(4-amino-3-methoxypiperidino)formate in 50 ml of tetrahydrofuran was added dropwise. After being stirred for 20 hours at room temperature, the reaction mixture was concentrated under reduced pressure. Water was added to the residue, and the mixture was extracted with dichloromethane. The extract was washed with aqueous potassium carbonate solution, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The residue was washed with diethyl ether to give 44.5 g of colorless crystals.
(2) cis-4-Amino-5-chloro-2-methoxy-N-[(3-methoxy-4-piperidinyl) benzamide
A mixture of 44.0 g of ethyl cis-[4-(4-amino-5-chloro-2-methoxybenzamide)-3-methoxypiperidino]formate, 67.7 g of potassium hydroxide, and 400 ml of iso-propanol was refluxed for 9 hours. The reaction mixture was concentrated under reduced pressure, and then water was added to the residue and the mixture was extracted with dichloromethane. The extract was dried over anhydrous sodium sulfate and then concentrated under reduced pressure. The residue was washed with iso-propylether to give 27.0 g of colorless crystals. Recrystallization from ethanol gave colorless prisms,
m.p. 193.degree.-194.degree. C.
Anal. C.sub.14 H.sub.20 ClN.sub.3 O.sub.3 Calcd. C: 53.59; H: 6.42; N: 13.39 Found C: 53.44; H: 6.38; N: 13.28
Example 1
Ethyl endo-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]ace tate
A mixture of 12.4 g of endo-4-acetylamino-N-(9-azabicyclo[3.3.1]non-3-yl)-2-methoxybenzamide, 4.6 ml of ethyl bromoacetate, 5.72 g of potassium carbonate, and 75 ml of N,N-dimethylformamide was heated for 2 hours at 60.degree. C. with stirring. The reaction mixture was poured into ice-water, and crystals precipitated were collected by filtration and washed with water to give 13.4 g of pale yellow crystals. Recrystallization from benzene gave colorless prisms, m.p. 85.degree.-88.degree. C.
Anal. C.sub.22 H.sub.31 N.sub.3 O.sub.5.1/2H.sub.2 O Calcd. C: 61.95; H: 7.56; N: 9.85 Found C: 61.85; H: 7.55; N: 9.86
In the same manner as Example 1, the compounds of Examples 2 to 12 were obtained.
Example 2
Ethyl endo-4-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]b utyrate
Appearance: colorless oil
IR Spectrum .nu. (liq) cm.sup.-1 : 1732, 1698, 1638
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.00-2.15(10H,m), 1.26(3H,t,J=7.0 Hz), 2.21(3H,s), 2.37(2H,t,J=7.0Hz), 2.45-2.60(2H,m), 2.60-2.85(2H,m), 3.10-3.30 (2H,m), 3.96(3H,s), 4.13(2H,q,J=7.0Hz), 4.30-4.55(1H,m), 6.77(1H,dd,J=8.5,1.5 Hz) , 7.65-7.75(1H,m) , 7.82(1H,s) , 7.86(1H,d,J=l.5 Hz), 8.09(1H,d,J=8.5 Hz)
High Resolution Mass Spectrum: C.sub.24 H.sub.35 N.sub.3 O.sub.5 Calcd. m/z: 445.2577 Found m/z: 445.2586
Example 3
Methyl endo-6-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]h exanoate
Appearance: colorless oil
IR Spectrum .nu. (liq) cm.sup.-1 : 1738, 1698, 1638
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.00-2.00(14H,m), 2.21(3H,s), 2.33(2H,t,J=7.5 Hz), 2.40-2.65(2H,m), 2.65-2.85(2H,m), 3.15-3.35(2H,m), 3.67(3H,s), 3.97(3H,s), 4.40-4.60(1H,m), 6.78(1H,d,J=8.0 Hz), 7.65-7.70(1H,m), 7.70-7.80(1H,m), 7.85(1H,s), 8.10(1H,d,J=8.0 Hz)
High Resolution Mass Spectrum: C.sub.25 H.sub.37 N.sub.3 O.sub.5 Calcd. m/z: 459.2733 Found m/z: 459.2744
Example 4
Methyl endo-8-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]o ctanoate
Appearance: colorless needles (EtOH)
m.p. 159.degree.-160.degree. C.
IR Spectrum p (KBr) cm.sup.-1 : 1740, 1696, 1636
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.00-2.15(18H,m), 2.21(3H,s) , 2.30(2H,t,J=7.5 Hz), 2.40-2.60(2H,m), 2.60-2.70(2H,m), 3.10-3.30(2H,m), 3.67(3H,s), 3.95(3H,s), 4.30-4.60(1H,m), 6.80(1H,dd,j=8.5,2.0 Hz), 7.65-7.75(1H,m), 7.87(1H,m), 8.07(1H,d,J=8.5 Hz), 8.26(1H,d,J=2.0 Hz)
High Resolution Mass Spectrum: C.sub.27 H.sub.41 N.sub.3 O.sub.5 Calcd. m/z: 487.3046 Found m/z: 487.3041
Example 5
Ethyl endo-3-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]p ropionate
Appearance: colorless oil
IR Spectrum .nu. (KBr) cm.sup.-1 : 1732, 1698, 1638
NMR Spectrum .delta. (CDCl.sub.3) ppm : 1.00-2.06(8H,m), 1.27(3H,t,J=7.0 Hz), 2.21(3H,s), 2.32-2.54(2H,m), 2.40(2H,t,J=7.0 Hz), 2.95(2H,t,J=7.0 Hz), 3.06-3.20(2H,m), 3.95(3H,s), 4.15(2H,q,J=7.0 Hz), 4.28-4.46(1H,m), 6.77 (1H,dd,J=8.5,2.0 Hz), 7.58-7.72(1H,m) , 7.87(1H,br-s) , 8.06(1H,d,J=8.5 Hz), 8.19(1H,s)
High Resolution Mass Spectrum: C.sub.23 H.sub.33 N.sub.3 O.sub.5 Calcd. m/z: 431.2420 Found m/z: 431.2420
Example 6
Ethyl endo-5-[3-(4-acetylamino-2-methoxybenzamido )-9-azabicyclo[3.3.1]non-9-yl]valerate
Appearance: colorless oil
IR Spectrum .nu. (KBr) cm.sup.-1 : 1734, 1696, 1636
NMR Spectrum .delta. (CDCl.sub.3) ppm: 0.95-2.10(12H,m), 1.26(3H,t,J=7.0 Hz), 2.21(3H,s), 2.31(2H,t,J=7.0 Hz), 2.37-2.55(2H,m), 2.64(2H,t,J=7.0 Hz), 3.03-3.20(2H,m), 3.95(3H,s), 4.13(2H,q,J=7.0 Hz), 4.33-4.53(1H,m), 6.77(1H,dd,J=8.5,2.0 Hz), 7.58-7.72(1H,m), 7.87(1H,d,J=2.0 Hz), 8.07(1H,d,J=8.5 Hz), 8.09(1H,s)
High Resolution Mnass Spectrum: C.sub.25 H.sub.37 N.sub.3 O.sub.5 Calcd. m/z: 459.2733 Found m/z: 459.2724
Example 7
Methyl endo-7-[3-(4-acetylamino-2-methoxybenzamido )-9-azabicyclo[3.3.1]non-9-yl]heptanoate
Appearance: colorless oil
IR Spectrum .nu. (KBr) cm.sup.-1 : 1732, 1696, 1644
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.00-2.10(16H,m), 2.21(3H,s), 2.30(2H,t,J=7.5 Hz), 2.37-2.55(2H,m), 2.61(2H,t,J=7.0 Hz), 3.05-3.20(2H,m), 3.66(3H,s), 3.93(3H,s), 4.35-4.55(1H,m), 6.84 (1H,dd,J=8.5,1.5 Hz), 7.64-7.78(1H,m), 7.87(1H,d,J=8.5 Hz), 8.03(1H,d,J=8.5 Hz), 8.85(1H,s)
High Resolution Mass Spectrum: C.sub.26 H.sub.3 9 N.sub.3 O.sub.5 Calcd. m/z: 473.2890 Found m/z: 473.2893
Example 8
Ethyl endo-[3-(4-acetylamino-2-ethoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]acet ate
Appearance: colorless needles (benzene)
m.p. 77.degree.-81.degree. C.
Anal. C.sub.23 H.sub.33 N.sub.3 O.sub.5.1/2H.sub.2 O Calcd. C: 62.71;,H: 7.78; N: 9.54 Found C: 62.72; H: 7.57; N: 9.55
Example 9
Ethyl exo-[3-(4-acetylamino-2-methoxybenzamido )-9-azabicyclo[3.3.1]non-9-yl]acetate
Appearance: colorless oil
IR Spectrum .nu. (KBr) cm.sup.-1 : 1746, 1686, 1636
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.28(3H,t,J=7.0 Hz), 1.40-2.13(10H,m), 2.20(3H,s), 3.00-3.15(2H,m), 3.54(2H,s), 3.94(3H,s), 4.19(2H,q,J=7.0 Hz), 4.80-5.00(1H,m), 6.78(1H,dd,J=8.5,2.0 Hz), 7.57-7.75(1H,m), 7.83(1H,d,J=2.0 Hz), 7.87(1H,s), 8.09(1H,d,J=8.5 Hz)
High Resolution Mass Spectrum: C.sub.22 H.sub.31 N.sub.3 O.sub.5 Calcd. m/z: 417.2264 Found m/z: 417.2253
Example 10
Ethyl exo-[3-(4-acetylamino-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl]acet ate
Appearance: pale yellow oil
IR Spectrum .delta. (KBr) cm.sup.-1 : 1746, 1692, 1638
NMR Spectrum .nu. (CDCl.sub.3) ppm: 1.28(3H,t,J=7.0 Hz), 1.60-2.10(8H,m), 2.20(3H,s), 3.23(2H,s), 3.30-3.45(2H,m), 3.92(3H,s), 4.20(2H,q,J=7.0 Hz), 4.28-4.48(1H,m), 6.77(1H,dd,J=8.5, 2.0 Hz), 7.60(1H,s), 7.60-7.80(1H,m), 7.80(1H,d,J=2.0 Hz), 7.80(1H,s), 8.10(1H,d,J=8.5 Hz)
High Resolution Mass Spectrum: C.sub.21 H.sub.29 N.sub.3 O.sub.5 Calcd. m/z: 403.2107 Found m/z: 403.2111
Example 11
Ethyl endo-3-[3-(4-acetylamino-5-chloro-2-methoxybenzamido )-8-azabicyclo[3.2.1]oct-8-yl]acetate
Appearance: colorless prisms (EtOH)
m.p. 144.degree.-145.degree. C.
Anal. C.sub.21 H.sub.28 ClN.sub.3 O.sub.5 Calcd. C: 57.60; H: 6.44; N: 9.60 Found C: 57.45; H: 6.32; N: 9.49
Example 12
Ethyl endo-4-[3-(4-amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-y l]butyrate
Appearance: pale brown needles (AcOEt)
m.p. 154.degree.-156.degree. C.
Anal. C.sub.21 H.sub.30 ClN.sub.3 O.sub.4.1/4H.sub.2 O Calcd. C: 58.87; H: 7.18; N: 9.81 Found C: 58.80; H: 6.97; N: 9.71
Example 13
Ethyl endo-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non -9-yl]acetate
To a suspension of 13.0 g of ethyl endo-[3-(4-acetylamino-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]ace tate in 140 ml of dichloromethane, 3.4 ml of sulfuryl chloride was added dropwise at-10.degree. C. Stirring was continued at room temperature for 1.5 hours, and then the mixture was made basic by adding saturated aqueous sodium bicarbonate solution. The organic layer was separated and dried over anhydrous sodium Sulfate. After being concentrated under reduced pressure, the residue was purified by column chromatography on silica gel (eluent: dichloromethane-methanol/50:1) to give 11.4 g of pale yellow amorphous solid.
IR Spectrum .nu. (KBr) cm.sup.-1 : 1750, 1646
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.05-2.17(8H,m), 1.28(3H,t,J=7.3 Hz), 2.28(3H,s), 2.42-2.64(2H,m), 3.12-3.34(2H,m), 3.49(2H,s), 3.98(3H, 4.17(2H,q,J=7.3 Hz), 4.34-4.55(1H,m), 7.58-7.71(1H,m), 7.80(1H,s), 8.22(1H,s), 8.32(1H,s)
High Resolution Mass Spectrum: C.sub.22 H.sub.30 ClN.sub.3 O.sub.5 Calcd. m/z: 451.1874, 453.1844 Found m/z: 451.1859, 453.1853
In the same manner as
Example 13, the compounds of Examples 14 to 22 were obtained.
Example 14
Ethyl endo-4-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]n on-9-yl]butyrate
Appearance: colorless oil
IR Spectrum .nu. (liq) cm.sup.-1 : 1732, 1704, 1646
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.00-2.10(10H,m), 1.27(3H,t,J=7.0 Hz), 2.28(3H,s), 2.37(2H,t,J=7.5 Hz), 2.45-2.60(2H,m), 2.65-2.80(2H,m), 3.05-3.20(2H,m), 3.98(3H,s), 4.14(2H,q,J=7.0 Hz), 4.30-4.50(1H,m), 7.55-7.65(1H,m), 7.82(1H,s), 8.20(1H,s), 8.31(1H,s)
High Resolution Mass Spectrum: C.sub.24 H.sub.34 Cln.sub.3 O.sub.5 Calcd. m/z: 479.2187, 481.2157 Found m/z: 479.2190, 481.2173
Example 15
Methyl endo-6-[3-(4-acetylamino-5-chloro-2-methoxybenzamido )-9-azabicyclo[3.3.1]non-9-yl]hexanoate fumarate
Appearance: colorless needles (EtOH)
m.p. 157.degree.-161.degree. C.
Anal. C.sub.25 H.sub.36 ClN.sub.3 O.sub.5.C.sub.4 H.sub.4 O.sub.4.5/4H.sub.2 O Calcd. C: 55.06; H: 6.77; N, 6.64 Found C: 54.95; H: 6.94; N, .6.72
Example 16
Methyl endo-8-[3-(4-acetylamino-5-chloro-2-methoxybenzamido )-9-azabicyclo[3.3.1]non-9-yl]octanoate
Appearance: colorless needles (EtOH )
IR Spectrum .nu. (KBr) cm.sup.-1 : 1738, 1704, 1646
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.00-2.10(18H,m), 2.28(3H,s), 2.31(2H,t,J=7.5 Hz), 2.35-2.55(2H,m), 2.55-2.75(2H,m), 3.10-3.25(2H,m), 3.67(3H,s), 3.98(3H,s), 4.30-4.55(1H,m), 7.55-7.75(1H,m), 7.81(1H,s), 8.21(1H,s), 8.31(1H,s)
High Resolution Mass Spectrum: C.sub.27 H.sub.40 ClN.sub.3 O.sub.5 Calcd. m/z: 521.2657, 523.2627 Found m/z: 521.2642, 523.2617
Example 17
Ethyl endo-3-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]n on-9-yl]propionate sesquifumarate
Appearance: colorless needles (EtOH )
m.p. 170.degree.-172.degree. C.
Anal. C.sub.23 H.sub.32 ClN.sub.3 O.sub.5 3/2C.sub.4 H.sub.4 O.sub.4 Calcd. C: 54.42; H: 5.98; N: 6.56 Found C: 54.18; H: 6.06; N: 6.69
Example 18
Ethyl endo-5-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]n on-9-yl]valerate fumarate
Appearance: colorless crystals (acetone)
m.p. 127.degree.-129.degree. C.
Anal. C.sub.25 H.sub.36 ClN.sub.3 O.sub.5.C.sub.4 H.sub.4.1/2H.sub.2 O Calcd. C: 56.26; H: 6.67; N: 6.79 Found C: 56.34; H: 6.72; N: 6.65
Example 19
Methyl endo-7-[3-(4-acetylamino-5-chloro-2-methoxybenzamido )-9-azabicyclo[3.3.1]non-9-yl]heptanoate fumarate
Appearance: colorless needles (MeOH-Et.sub.2 O)
m.p. 124.5.degree.-126.degree. C.
Anal. C.sub.26 H.sub.38 ClN.sub.3 O.sub.5.C.sub.4 H.sub.4 O.sub.4.3/4H.sub.2 O Calcd. C: 56.51; H: 6.88; N: 6.59 Found C: 56.51; H: 6.82; N: 6.59
Example 20
Ethyl endo-[3-(4-acetylamino-5-chloro-2-ethoxybenzamido)-9-azabicyclo[3.3.1]non- 9-yl]acetate
Appearance: slightly yellow syrup
IR Spectrum .nu. (liq) cm.sup.-1 : 1748, 1704, 1646
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.05-1.64(5H,m), 1.75-2.10(3H,m), 2.45-2.65(2H,m), 1.28(3H,t,J=7.0 Hz), 1.52(3H,t,J=7.0 Hz), 2.27(3H,s), 3.16-3.31(2H,m), 3.49(2H,s), 4.18(2H,q,J=7.0 Hz), 4.22(2H,q,J=7.0 Hz), 4.37-4.55(1H,m), 7.78(1H,br-s), 7.80-7.94(1H,m), 8.21(1H,s), 8.27(1H,s)
High Resolution Mass Spectrum: C.sub.23 H.sub.32 ClN.sub.3 O.sub.5 Calcd. m/z: 465.2031, 467.2001 Found m/z: 465.2033, 467.2003
Example 21
Ethyl exo-[3-(4-acetylamino-5-chloro-2-methoxybenzamido )-9-azabicyclo[3.3.1]non-9-yl]acetate 1/2 fumarate
Appearance: colorless needles (MeOH)
IR Spectrum .nu. (KBr) cm.sup.-1 : 1738, 1698, 1638
NMR Spectrum .delta. (DMSO-d.sub.6) ppm: 1.19(3H,t,J=7.0 Hz), 1.43-2.05(10H,m), 2.14(3H,s), 2.90-3.00(2H,m), 3.48(2H,s), 3.85(3H,s), 4.08(2H,q,J=7.0 Hz), 4.55-4.73(1H,m), 6.61(1H,s), 7.69(1H,s), 7.73(1H,s), 7.70-7.90(1H,m), 9.42 (1H,s)
High Resolution Mass Spectrum: C.sub.22 H.sub.30 ClN.sub.3 O.sub.5 Calcd. m/z: 451.1874, 453.1844 Found m/z: 451.1876, 453.1840
Example 22
Ethyl exo-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct- 8-yl]acetate maleate
Appearance: colorless crystals (EtOH)
m.p. 174.degree.-175.degree. C.
Anal. C.sub.21 H.sub.28 ClN.sub.3 O.sub.5.C.sub.4 H.sub.4 O.sub.4 Calcd. C: 54.20; H: 5.82; N: 7.58 Found C: 54.03; H: 5.85; N: 7.56
Example 23
Ethyl endo-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl] acetate
To a solution of 11.0 g of ethyl endo-[3-(4-acetylamino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non -9-yl]acetate in 22 ml of ethanol, 66 ml of 20% hydrogen chloride/ethanol solution was added and the mixture was refluxed for 1 hour. The reaction mixture was concentrated under reduced pressure, and then the residuce was dissolved in water and pH was adjusted to 10 with potassium carbonate. Crystals precipitated were collected by filtration and washed with water and then with isopropyl ether to give 8.88 g of pale brown crystals. Recrystallization from ethanol gave colorless crystals, m.p. 163.5.degree.-164.5.degree. C.
Anal. C.sub.20 H.sub.28 ClN.sub.3 O.sub.4 Calcd. C: 58.60; H: 6.88; N: 10.25 Found C: 58.39; H: 6.84; N: 10.26
In the same manner as Example 23, the compounds of Examples 24 to 33 were obtained.
Example 24
Ethyl endo-4-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]butyrate
Appearance: pale orange prisms (EtOH)
m.p. 136.5.degree.-138.degree. C.
Anal. C.sub.24 H.sub.36 ClN.sub.3 O.sub.4 Calcd. C: 60.33; H: 7.36; N: 9.59 Found C: 60.27; H: 7.41; N: 9.52
Example 25
Ethyl endo-6-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]hexanoate
Appearance: colorless prisms (EtOH)
m.p. 122.degree.-123.5.degree. C.
Anal. C.sub.24 H.sub.36 ClN.sub.3 O.sub.4 Calcd. C: 61.86; H: 7.79; N: 9.02 Found C: 61.68; H: 7.80; N: 9.01
Example 26
Ethyl endo-8-[3-(4-amino-5-chloro-2-methoxybenzamido)-.sub.9 -azabicyclo[3.3.1]non-9-yl]octanoate
Appearance: colorless needles (EtOH)
m.p. 108.degree.-109.degree. C.
Anal. C.sub.26 H.sub.40 ClN.sub.3 O.sub.4 Calcd. C: 63.21; H: 8.16; N: 8.50 Found C: 62.93; H: 8.14; N: 8.46
Example 27
Ethyl endo-3-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]propionate
Appearance: pale pink needles (AcOEt)
m.p. 110.degree.-112.degree. C.
Anal. C.sub.21 C H.sub.30 ClN.sub.3 O.sub.4 Calcd. C: 59.50; H: 7.13; N: 9.91 Found C: 59.31; H: 7.12; N: 9.89
Example 28
Ethyl endo-5-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]valerate
Appearance: colorless crystals (EtOH)
m.p. 126.degree.-128.degree. C.
Anal. C.sub.23 H.sub.34 ClN.sub.3 O.sub.4 Calcd. C: 61.12; H: 7.58; N: 9.30 Found C: 60.85; H: 7.49; N: 9.26
Example 29
Methyl endo-7-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-y l]heptanoate
Appearance: colorless prisms (MeOH-Et.sub.2 O)
m.p. 144.5.degree.-145.5.degree. C.
Anal. C.sub.24 H.sub.36 ClN.sub.3 O.sub.4 Calcd. C: 61.86; H: 7.79; N: 9.02 Found C: 61.64; H: 7.75; N: 9.06
Example 30
Ethyl endo-[3-(4-amino-5-chloro-2-ethoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]a cetate
Appearance: colorless needles (EtOH)
m.p. 215.degree.-217.degree. C.
Anal. C.sub.21 H.sub.30 ClN.sub.3 O.sub.4 Calcd. C: 59.50; H: 7.13; N: 9.91 Found C: 59.26; H, 7.04; N: 9.87
Example 31
Ethyl exo-[3-(4-amino-5chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]ac etate
Appearance: pale pink crystals (iso-PrOH-Et.sub.2 O)
m.p. 161.degree.-164.degree. C.
Anal. C.sub.20 H.sub.28 ClN.sub.3 O.sub.4.3/4H.sub.2 O Calcd. C: 56.73; H: 7.02; N: 9.92 Found C: 56.73; H: 6.63; N: 9.96
Example 32
Ethyl endo-[3-(4-amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl] acetate
Appearance: colorless plates (EtOH)
m.p. 187.degree.-188.degree. C.
Anal. C.sub.19 H.sub.26 ClN.sub.3 O.sub.4 Calcd. C: 57.65; H: 6.62; N: 10.61 Found C: 57.57; H: 6.52; N: 10.42
Example 33
Ethyl exo-[3-(4-amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl]a cetate
Appearance: pale orange prisms (EtOH-Et.sub.2 O)
m.p. 188.5.degree.-190.degree. C.
Anal. C.sub.19 H.sub.26 ClN.sub.3 O.sub.4 Calcd. C: 57.65; H: 6.62; N: 10.61 Found C: 57.60; H: 6.57; N: 10.49
Example 34
endo-[3-(4-Amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]a cetic acid hydrochloride
To a suspension of 8.00 g of ethyl endo-[3-(4-amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl] acetate in 80 ml of methanol, 19.5 ml of 2N sodium, hydroxide solution was added and the mixture was refluxed for 1 hour. After the reaction mixture was concentrated under reduced pressure, the residuce was dissolved in a small volume of water and pH was adjusted to 1 with 10% hydrochloric acid. Crystals precipitated were collected by filtration, washed with water, and then recrystallized from methanol-isopropyl ether to give 5.75 g of colorless powder, m.p. 189.degree.-194.degree. C. (decomp.).
Anal. C.sub.18 H.sub.24 ClN.sub.3 O.sub.4.HCl.H.sub.2 O Calcd. C: 49.55; H: 6.23; N: 9.63 Found C: 49.38; H: 5.99; N: 9.49
In the same manner as Example 34, the compounds of Examples 35 to 45 were obtained.
Example 35
endo-4-[3-(4-Amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl ]butyric acid hydrochloride
Appearance: colorless crystals (H.sub.2 O)
m.p. 166.degree.-167.degree. C.
Anal. C.sub.20 H.sub.28 ClN.sub.3 O.sub.4.HCl.3/2H.sub.2 O Calcd. C: 50.74; H: 6.81; N: 8.88 Found C: 50.68; H: 6.66; N: 8.91
Example 36
endo-6-[3-(4-Amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl ]hexanoic acid hydrochloride
Appearance: colorless crystals (H.sub.2 O)
m.p. 237.degree.-239.degree. C.
Anal. C.sub.22 H.sub.32 ClN.sub.3 O.sub.4.HCl.5/4H.sub.2 O Calcd. C: 53.17; H: 7.20; N: 8.46 Found C: 53.32;H: 7.01; N: 8.48
Example 37
endo-8-[3-(4-Amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl ]octanoic acid hydrochloride
Appearance: slightly orange crystals (H.sub.2 O)
m.p. 125.degree.-128.degree. C.
Anal. C.sub.24 H.sub.36 ClN.sub.3 O.sub.4.HCl5/4H.sub.2 O Calcd. C: 54.91; H: 7.58; N: 8.00 Found C: 54.87; H: 7.44; N: 7.98
Example 38
endo-3-[3-(4-Amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non- 9-yl]propionic acid hydrochloride
Appearance: pale brown prisms (H.sub.2 O)
m.p. 157.degree.-160.degree. C.
Anal. C.sub.19 H.sub.26 ClN.sub.3 O.sub.4.HCl.7/4H.sub.2 O Calcd. C: 49.20; H: 6.63; N: 9.06 Found C: 49.27; H: 6.41; N: 9.07
Example 39
endo-5-[3-(4-Amino-5-chloro-2-methoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl ]valeric acid hydrochloride
Appearance: pale pink crystals (H.sub.2 O)
m.p. 152.degree.-153.5.degree. C
Anal. C.sub.21 H.sub.30 ClN.sub.3 O.sub.4.HCl.7/4H.sub.2 O Calcd. C: 51.27; H: 7.06; N: 8.54 Found C: 51.30;.H: 6.89; N: 8.53
Example 40
endo-7-[3-(4-Amino-5-chloro-2-methoxybenzamido )-9-azabicyclo[3.3.1]non-9-yl]heptanoic acid hydrochloride
Appearance: colorless needles (H.sub.2 O)
m.p. 130.degree.-133.degree. C.
Anal. C.sub.23 H.sub.34 ClN.sub.3 O.sub.4.HCl.2H.sub.2 O Calcd. C: 52.67; H: 7.49; N: 8.01 Found C: 52.61; H: 7.21; N: 8.14
Example 41
endo-[3-(4-Amino-5-chloro-2-ethoxybenzamido)-9-azabicyclo[3.3.1]non-9-yl]ac etic acid hydrochloride
Appearance: slightly yellow needles (H.sub.2 O)
m.p. 216.degree.-220.degree. C. (decomp.)
Anal. C.sub.19 H.sub.26 ClN.sub.3 O.sub.4.HCl.5/2H.sub.2 O Calcd. C: 47.80; H: 6.76; N: 8.80 Found C: 48.05; H: 6.41; N: 8.93
Example 42
exo-[3-(4-Amino-5-chloro-2-methoxybenzamido )-9-azabicyclo[3.3.1]non-9-yl]acetic acid
Appearance: pale orange crystals (MeOH)
m.p. 250.degree.-252.degree. C. (decomp.)
Anal. C.sub.18 H.sub.24 Cl N.sub.3 O.sub.4.3/4H.sub.2 O Calcd. C: 54.68; H: 6.50; N: 10.63 Found C: 54.68; H: 6.25; N: 10.94
Example 43
endo-[3-(4-Amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl]a cetic acid hydrochloride
Appearance: slightly yellow needles (H.sub.2 O)
m.p. 254.degree.-256.degree. C. (decomp.)
Anal. C.sub.17 H.sub.22 ClN.sub.3 O.sub.4.HCl.3/2H.sub.2 O Calcd. C: 47.34;, H: 6.08; N: 9.74 Found C:, 47.36; H: 5.96; N: 9.79
Example 44
endo-4-[3-(4-Amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl ]butyric acid hydrochloride
Appearance: colorless crystals (H.sub.2 O)
m.p. 242.degree.-243.degree. C.
Anal. C.sub.19 H.sub.26 ClN.sub.3 O.sub.4 HCl.5/4H.sub.2 O Calcd. C: 50.17; H: 6.54; N: 9.24 Found C: 50.29; H: 6.38; N: 9.23
Example 45
exo-[3-(4-Amino-5-chloro-2-methoxybenzamido)-8-azabicyclo[3.2.1]oct-8-yl]bu tyric acid
Appearance: pale orange crystals (MeOH-Et.sub.2 O)
m.p. 273.degree.-276.degree. C. (decomp.)
Anal. C.sub.17 H.sub.22 ClN.sub.3 O.sub.4 Calcd. C: 55.51; H: 6.03; N: 11.42 Found C: 55.20; H: 6.05; N: 11.20
Example 46
Ethyl [4-(4-amino-5-chloro-2-methoxybenzamido)-piperidino]acetate hydrochloride
A mixture of-3.20 g of 4-amino-5-chloro-2-methoxy-N-(4-piperidinyl)benzamide hydrochloride, 1.22 ml of ethyl bromoacetate, 3.04 g of porassium carbonate, and 32 ml of N,N-dimethylformamide was stirred for 2.5 hours with heating at 60.degree. C. The reaction mixture was concentrated under reduced pressure, and then the residue was added with water and extracted with dichloromethane. The extract was washed with saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure to give brown oil. The result was converted to the hydrochloride by an ordinary method to afford 3.31 g of pale yellow crystals. Recrystallization from ethanol gave colorless plates, m.p. 196.5.degree.-198.5.degree. C.
Anal. C.sub.17 H.sub.24 ClN.sub.3 O.sub.4 HCl Calcd. C: 50.25; H: 6.20; N: 10.34 Found C: 49.98; H: 6.23; N: 10.36
In the same manner as Example 46, the compounds of Examples 47-57 were obtained.
Example 47
Ethyl 4-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]butyrate hydrochloride
Appearance: slightly brown columns (EtOH)
m.p. 188.5.degree.-191.5.degree. C.
Anal. C.sub.19 H.sub.28 ClN.sub.3 O.sub.4.HCl Calcd. C: 52.54; H: 6.73; N: 9.67 Found C: 52.18; H: 6.66; N: 9.75
Example 48
Methyl 6-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]hexanoate hydrochloride
Appearance: slightly brown needles (MeOH)
m.p. 208.5.degree.-210.5.degree. C.
Anal. C.sub.20 H.sub.30 ClN.sub.3 O.sub.4.HCl.5/4H.sub.2 O Calcd. C: 51.01; H: 7.17; N: 8.92 Found C: 51.06; H: 7.03; N: 8.99
Example 49
Ethyl 3-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]propionate
Appearance: colorless needles (acetone-Et.sub.2 O)
m.p. 116.degree.-117.5.degree. C.
Anal. C.sub.18 H.sub.26 ClN.sub.3 O.sub.4 Calcd. C: 56.32; H: 6.83; N: 10.95 Found C: 56.28; H: 6.74; N: 10.87
Example 50
Ethyl 5-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]valerate hydrochloride
Appearance: colorless crystals (EtOH)
m.p. 202.degree.-203.5.degree. C.
Anal. C.sub.20 H.sub.30 ClN.sub.3 O.sub.4.HCl.1/4H.sub.2 O Calcd. C: 53.04; H: 7.01; N: 9.28 Found C: 52.99; H: 6.95; N: 9.21
Example 51
Ethyl 2-[4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]propionate fumarate
Appearance: slightly yellow crystals (EtOH)
m.p. 158.degree.-159.degree. C.
Anal. C.sub.18 H.sub.26 ClN.sub.3 O.sub.4.C.sub.4 H.sub.4 O.sub.4 Calcd. C: 52.85; H: 6.05; N: 8.40 Found C: 52.67; H: 5.94; N: 8.39
Example 52
Ethyl cis-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]acetate hydrochloride
Appearance: colorless needles (MeOH)
m.p. 225.degree.-226.degree. C.
Anal. C.sub.18 H.sub.26 ClN.sub.3 O.sub.5.HCl.1/4H.sub.2 O Calcd. C: 49.04; H: 6.29; N: 9.53 Found C: 48.89; H: 6.14; N: 9.44
Example 53
Ethyl cis-4-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]butyrat e hydrochloride
Appearance: colorless crystals (EtOH)
m.p. 218.degree.-219.5.degree. C.
Anal. C.sub.20 H.sub.30 ClN.sub.3 O.sub.5.HCl Calcd. C: 51.73; H: 6.73; N: 9.05 Found C: 51.45; H: 6.64; N: 8.98
Example 54
Ethyl cis-6-[4-(4-amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]hexanoa te hydrochloride
Appearance: colorless crystals (EtOH)
m.p. 207.degree.-208.5.degree. C.
Anal. C.sub.22 H.sub.34 ClN.sub.3 O.sub.5 HCl.1/4H.sub.2 O Calcd. C: 53.17; H: 7.20; N: 8.46 Found C: 52.95; H: 7.09; N: 8.35
Example 55
Ethyl [2-[(4-amino-5-chloro-2-methoxybenzamido)-methyl]morpholino]acetate hydrochloride
Appearance: pale yellow crystals (H.sub.2 O)
m.p. 203.degree.-204.degree. C.
Anal. C.sub.17 H.sub.24 ClN.sub.3 O.sub.5.HCl Calcd. C: 48.35; H: 5.97; N: 9.95 Found C: 48.12; H: 6.03; N: 9.75
Example 56
Ethyl 4-[2-[(4-amino-5-chloro-2-methoxybenzamido)-methyl]morpholino]butyrate hyd rochloride
Appearance: pale yellow crystals (EtOH)
m.p. 196.degree.-197.degree. C.
Anal. C.sub.19 H.sub.28 ClN.sub.3 O.sub.5.HCl.1/2H.sub.2 O Calcd. C: 49.68; H: 6.58; N: 9.15 Found C: 49.59; H: 6.65; N: 9.10
Example 57
Ethyl [3[(4-amino-5-chloro-2-methoxybenzamido)methyl]pyrrolidin-1-yl]acetate
Appearance: pale yellow oil
IR Spectrum .nu. (liq.) cm.sup.-1 : 1744, 1632
NMR Spectrum .delta. (CDCl.sub.3) ppm: 1.27(3H,t,J=7.0 Hz), 1.46-1.69(1H, m), 1.93-2.14(1H,m), 2.38-2.99(5H,m), 3.24-3.54(4H,m), 3.89(3H,s), 4.18(2H,q,J=7.0 Hz), 4.39(2H,br-s), 6.29(1H,s), 7.81(1H,br-s), 8.09(1H,s) High Resolution Mass Spectrum: C.sub.17 H.sub.24 ClN.sub.3 O.sub.4 Calc. m/z : 369.1455, 371.1426 Found m/z: 369.1466, 371.1439
Example 58
[4-[(4-Amino-5-chloro-2-methoxybenzamido)piperidino]acetic acid hydrochloride
To a suspension of 2.23 g of ethyl [4-[(4-amino-5-chloro-2-methoxybenzamido)piperidino]acetate in 22 ml of methanol, 9,86 ml of 2N sodium hydroxide solution was added and the mixture was refluxed for 1 hour. After methanol was removed by distillation under reduced pressure, 10% hydrochloric acid was added to the residue and pH was adjusted to 2. After the mixture was cooled to 5.degree. C., crystals precipitated were collected by filtration and washed with water to give 1.47 g of pale brown crystals. Recrystallization from water gave pale yellow prisms, m.p. 248.degree.-251.degree. C. (decomp.).
Anal. C.sub.15 H.sub.20 ClN.sub.3 O.sub.4.HCl.1/4H.sub.2 O Calcd. C: 47.07; H: 5.66; N: 10.98 Found C: 47.34; H: 5.58; N: 11.08
In the same manner as Example 58, the compounds of Examples 59-68 were obtained.
Example 59
4-[4-(4-Amino-5-chloro-2-methoxybenzamido)piperidino]butyric acid hydrochloride
Appearance: pale yellow prisms (H.sub.2 O)
m.p. 228.5.degree.-231.5.degree. C.
Anal. C.sub.17 H.sub.24 ClN.sub.3 O.sub.4.HCl.H.sub.2 O Calcd. C: 48.12; H: 6.41; N: 9.90 Found C: 47.97; H: 6.34; N: 10.12
Example 60
6-[4-(4-Amino-5-chloro-2-methoxybenzamido)piperidino]hexanoic acid hydrochloride
Appearance: slightly brown prisms (H.sub.2 O)
m.p. 223.degree.-225.degree. C.
Anal. C.sub.19 H.sub.28 ClN.sub.3 O.sub.4.HCl.H.sub.2 O Calcd. C: 50.45; H: 6.91; N: 9.29 Found C: 50.33; H: 6.84; N: 9.25
Example 61
3-[4-(4-Amino-5-chloro-2-methoxybenzamido )piperidino]propionic acid hydrochloride
Appearance: colorless needles (H.sub.2 O)
m.p. 218.degree.-219.5.degree. C.
Anal. C.sub.16 H.sub.22 ClN.sub.3 O.sub.4.HCl Calcd. C: 48.99; H: 5.91; N: 10.71 Found C: 48.80; H: 5.84; N: 10.68
Example 62
5-[4-(4-Amino-5-chloro-2-methoxybenzamido)piperidino]valeric acid hydrochloride
Appearance: colorless crystals (H.sub.2 O)
m.p. 226.degree.-227.5.degree. C.
Anal. C.sub.18 H.sub.26 ClN.sub.3 O.sub.4.HCl.H.sub.2 O Calcd. C: 49.32; H: 6.67; N: 9.59 Found C: 49.18; H: 6.45; N: 9.54
Example 63
2-[4-(4-Amino-5-chloro-2-methoxybenzamido)piperidino]propionic acid
Appearance: pale yellow crystals (H.sub.2 O)
m.p. 246.degree.-247.degree. C.
Anal. C.sub.16 H.sub.22 ClN.sub.3 O.sub.4.5/4H.sub.2 O Calcd. C: 50.79; H: 6.53; N: 11.11 Found C: 50.59; H: 6.25; N: 11.06
Example 64
cis-[4-(4-Amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]acetic acid
Appearance: colorless needles (H.sub.2 O)
m.p. 230.degree.-233.degree. C. (decomp.)
Anal. C.sub.16 H.sub.22 ClN.sub.3 O.sub.5. 5/2H.sub.2 O Calcd. C: 46.10; H: 6.53; N: 10.08 Found C: 46.18; H: 6.57; N: 10.00
Example 65
cis-4-[4-(4-Amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]butyric acid hydrochloride
Appearance: colorless needles (H.sub.2 O)
m.p. 232.degree.-234.5.degree. C. (decomp.)
Anal. C.sub.18 H.sub.26 ClN.sub.3 O.sub.5.HCl.1/4H.sub.2 O Calcd. C: 49.04; H: 6.29; N: 9.53 Found C: 49.03; H: 6.19; N: 9.77
Example 66
cis-6-[4-(4-Amino-5-chloro-2-methoxybenzamido)-3-methoxypiperidino]hexanoic acid hydrochloride
Appearance: colorless prisms (H.sub.2 O)
m.p. 232.5.degree.-235.5.degree. C. (decomp.)
Anal. C.sub.20 H.sub.30 ClN.sub.3 O.sub.5.HCl Calcd. C: 51.73; H: 6.73; N: 9.05 Found C: 51.52; H: 6.62; N: 8.90
Example 67
[2-[(4-Amino-5-chloro-2-methoxybenzamido)methyl]morpholino]acetic acid
Appearance: slightly yellow crystals (MeOH)
m.p. 208.degree.-210.degree. C.
Anal. C.sub.15 H.sub.20 ClN.sub.3 O.sub.5 Calcd. C: 50.35; H: 5.63; N: 11.74 Found C: 50.04; H: 5.53; N: 11.63
Example 68
4-[2-[(4-Amino-5-chloro-2-methoxybenzamido )methyl]morpholino]butyric acid
Appearance: colorless needles (EtOH)
m.p. 194.degree.-195.degree. C
Anal. C.sub.17 H.sub.24 ClN.sub.3 O.sub.5 Calcd. C: 52.92; H: 6.27; N: 10.89 Found C: 52.60; H: 6.09; N: 10.83
INDUSTRIAL APPLICABILITY
As explained above, the novel benzamide derivatives of the present invention represented by formula (I) have excellent gastrointestinal stimulating activity and antiemetic activity and thus are useful for the treatment of gastrointestinal diseases.
Claims
What is claimed is:
1. A benzamide derivative represented by the following formula: ##STR5## wherein, R.sup.1 represents a hydrogen atom or a lower alkanoyl group; R.sup.2 represents a hydrogen atom or a halogen atom; R.sup.3 represents a lower alkoxy group; R.sup.4 represents a hydrogen atom or a lower alkyl group; R.sup.5 represents a hydrogen atom, a lower alkyl group, or a lower alkoxy group; A represents C.sub.1 -C.sub.7 alkylene group which may optionally be substituted with a lower alkyl group; X represents a methylene group, an oxygen atom, or a sulfur atom; m represents an integer of n represents an integer of from 0 to 3; and p represents an integer of from 0 to 2, and a pharmacologically acceptable salt thereof.
2. Ethyl [4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]acetate and a pharmacologically acceptable salt thereof.
3. [4-(4-amino-5-chloro-2-methoxybenzamido)piperidino]acetic acid and a pharmacologically acceptable salt thereof.
4. A pharmaceutical composition comprising a benzamide derivative represented by the following formula: ##STR6## wherein R.sup.1 represents a hydrogen atom or a lower alkanoyl group; R.sup.2 represents a hydrogen atom or a halogen atom; R.sup.3 represents a lower alkoxy group; R.sup.4 represents a hydrogen atom or a lower alkyl group; R.sup.5 represents a hydrogen atom, a lower alkyl group, or a lower alkoxy group; A represents C.sub.1 -C.sub.7 alkylene group which may optionally be substituted with a lower alkyl group; X represents a methylene group, an oxygen atom, or a sulfur atom; m represents an integer of 0; n represents an integer of from 0 to 3; and p represents an integer of from 0 to 2 or a pharmacologically acceptable salt thereof as an active ingredient.
5. The composition according to claim 4, which is useful for the treatment of gastrointestinal diseases.
6. A method for treatment of gastrointestinal diseases comprising the step of administering to a patient an effective amount of a benzamide derivative represented by the following formula: ##STR7## wherein R.sup.1 represents a hydrogen atom or a lower alkanoyl group; R.sup.2 represents a hydrogen atom or a halogen atom; R.sup.3 represents a lower alkoxy group; R.sup.4 represents a hydrogen atom or a lower alkyl group; R.sup.5 represents a hydrogen atom, a lower alkyl group, or a lower alkoxy group; A represents C.sub.1 -C.sub.7 alkylene group which may optionally be substituted with a lower alkyl group; X represents a methylene group, an oxygen atom, or a sulfur atom; m represents an integer of 0; n represents an integer of from 0 to 3; and p represents an integer of from 0 to 2 or a pharmacologically acceptable salt thereof.
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