O-Alkyl-O-Carbamoylglycerophosphocholines and the Use for Treating Hypertension

The present invention relates to new O-alkyl-O-carbamoylglycerophosphocholines and their use in the treatment of human beings suffering from diseases caused by hypertension.

The compounds according to the invention correspond to the general formulae I or II ##STR2## wherein R.sup.1 denotes a straight-chain, saturated or unsaturated hydrocarbon radical having 10-20 C atoms, while R.sup.2 and R.sup.3 can be identical or different and denote a straight-chain or branched, saturated or unsaturated hydrocarbon radical having 1-20 C atoms, or a hydrogen atom.

The following are examples of compounds according to the invention:

1-O-hexadecyl-2-O-methylcarbamoylglycero-3-phosphocholine,

2-O-ethylcarbamoyl-1-O-hexadecylglycero-3-phosphocholine,

1-O-hexadecyl-2-O-propylcarbamoylglycero-3-phosphocholine,

1-O-hexadecyl-2-O-isopropylcarbamoylglycero-3-phosphocholine,

2-O-butylcarbamoyl-1-O-hexadecylglycero-3-phosphocholine,

1-O-hexadecyl-2-O-pentylcarbamoylglycero-3-phosphocholine,

1-O-hexadecyl-2-O-hexylcarbamoylglycero-3-phosphocholine,

2-O-methylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

2-O-ethylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

1-O-octadecyl-2-O-propylcarbamoylglycero-3-phosphocholine,

2-O-isopropylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

2-O-butylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

1-O-octadecyl-2-O-pentylcarbamoylglycero-3-phosphocholine,

2-O-hexylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

1-O-hexadecyl-3-O-methylcarbamoylglycero-2-phosphocholine,

3-O-ethylcarbamoyl-1-O-hexadecylglycero-2-phosphocholine,

1-O-hexadecyl-3-O-propylcarbamoylglycero-2-phosphocholine,

1-O-hexadecyl-3-O-isopropylcarbamoylglycero-2-phosphocholine,

3-O-butylcarbamoyl-1-O-hexadecylglycero-2-phosphocholine,

1-O-hexadecyl-3-O-pentylcarbamoylglycero-2-phosphocholine,

1-O-hexadecyl-3-O-hexylcarbamoylglycero-2-phosphocholine,

3-O-methylcarbamoyl-1-O-octadecylglycero-2-phosphocholine,

3-O-ethylcarbamoyl-1-O-octadecylglycero-2-phosphocholine,

1-O-octadecyl-3-O-propylcarbamoylglycero-2-phosphocholine,

3-O-isopropylcarbamoyl-1-O-octadecylglycero-2-phosphocholine,

3-O-butylcarbamoyl-1-O-octadecylglycero-2-phosphocholine,

1-O-octadecyl-3-O-pentylcarbamoylglycero-2-phosphocholine,

3-O-hexylcarbamoyl-1-O-octadecylglycero-2-phosphocholine,

3-O-methylcarbamoyl-1-O-oleylglycero-2-phosphocholine,

3-O-ethylcarbamoyl-1-O-linolylglycero-2-phosphocholine,

3-O-dimethylcarbamoyl-1-O-octadecylglycero-2-phosphocholine,

3-O-dimethylcarbamoyl-1-O-hexadecylglycero-2-phosphocholine,

2-O-decylcarbamoyl-1-O-hexadecylglycero-3-phosphocholine,

1-O-hexadecyl-2-O-undecylcarbamoylglycero-3-phosphocholine,

2-O-dodecylcarbamoyl-1-O-hexadecylglycero-3-phosphocholine,

1-O-hexadecyl-2-O-tetradecylcarbamoylglycero-3-phosphocholine,

1-O-hexadecyl-2-O-hexadecylcarbamoylglycero-3-phosphocholine,

1-O-hexadecyl-2-O-octadecylcarbamoylglycero-3-phosphocholine,

2-O-eicosylcarbamoyl-1-O-hexadecylglycero-3-phosphocholine,

2-O-decylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

1-O-octadecyl-2-O-undecylcarbamoylglycero-3-phosphocholine,

2-O-dodecylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

1-O-octadecyl-2-O-tetradecylcarbamoylglycero-3-phosphocholine,

2-O-hexadecylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

1-O-octadecyl-2-O-octadecylcarbamoylglycero-3-phosphocholine,

2-O-eicosylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

3-O-decylcarbamoyl-1-O-hexadecylglycero-2-phosphocholine,

1-O-hexadecyl-3-O-undecylcarbamoylglycero-2-phosphocholine,

3-O-dodecylcarbamoyl-1-O-hexadecylglycero-2-phosphocholine,

1-O-hexadecyl-3-O-tetradecylcarbamoylglycero-2-phosphocholine,

1-O-hexadecyl-3-O-hexadecylcarbamoylglycero-2-phosphocholine,

1-O-hexadecyl-3-O-octadecylcarbamoylglycero-2-phosphocholine,

3-O-hexadecylcarbamoyl-1-O-oleylglycero-2-phosphocholine,

3-O-hexadecylcarbamoyl-1-O-linolylglycero-2-phosphocholine,

3-O-hexadecylcarbamoyl-1-O-octadecylglycero-2-phosphocholine,

1-O-octadecyl- -O-octadecylcarbamoylglycero-2-phosphocholine and

3-O-eicosylcarbamoyl-1-O-octadecylglycero-2-phosphocholine.

The compounds according to the invention have valuable pharmacological properties, i.e. antihypertensive properties, antirheumatic properties or antiartherosclerotic properties and are therefore suitable for use as an active compound in medicaments for human beings in dosages usual for antihypertensive agents.

Amongst the compounds according to the invention which have been listed, substances such as, for example, 1-O-hexadecyl-2-O-methylcarbamoylglycero-3-phosphocholine or 2-O-ethylcarbamoyl-1-O-hexadecylglycero-3-phosphocholine are particularly preferred, because they exhibit a very strong antihypertensive action and also an advantageous effect against rheumatic diseases. The said compounds can, therefore, be used for treating hypertension and various rheumatic, and a few atherosclerotic, clinical pictures in humans.

In addition, compounds such as, for example, 1-O-hexadecyl-2-O-hexadecylcarbamoylglycero-3-phosphocholine or 1-O-hexadecyl-3-O-hexadecylcarbamoylglycero-2-phosphocholine are preferred, since they possess distinct advantages compared with the natural or synthetic 1,2-diacylglycero-3-phosphocholines hitherto used in liposome techniques, since, in contrast to these phospholipids, they are stable to phospholipase A.sub.2 and thus make possible a better transmission of the included active compound to the site of action.

The substances according to the invention are prepared by reacting the lyso compounds III or IV wherein R.sup.1 has the meaning mentioned in claim 1, with the appropriate alkyl isocyanates of the formula VI ##STR3##

The reaction is advantageously carried out in organic aprotic solvents, such as, for example, chloroform, acetone or dimethylformamide or mixtures thereof, if appropriate using a catalyst, in particular a Lewis base, such as, for example, triethylamine, pyridine, dimethylaminopyridine or dimethylformamide, at temperatures between 0.degree. and 100.degree. C., preferably at 40.degree.-60.degree. C. The isocyanates can also be employed under the abovementioned conditions in the form of their imidazolides of the general formula VII ##STR4## since the imidazolides behave like free isocyanates (compare H. A. Staab and W. Rohr in: Neuere Methoden der praparativen organischen Chemie ("Recent Methods of preparative organic Chemistry"), page 79, Weinheim 1967).

The following are examples of suitable starting compounds III or IV:

1-O-decylglycero-3-phosphocholine,

1-O-undecylglycero-3-phosphocholine,

1-O-dodecylglycero-3-phosphocholine,

1-O-tridecylglycero-3-phosphocholine,

1-O-tetradecylglycero-3-phosphocholine,

1-O-pentadecylglycero-3-phosphocholine,

1-O-hexadecylglycero-3-phosphocholine,

1-O-heptadecylglycero-3-phosphocholine,

1-O-octadecylglycero-3-phosphocholine,

1-O-nonadecylglycero-3-phosphocholine,

1-O-eicosylglycero-3-phosphocholine,

1-O-decylglycero-2-phosphocholine,

1-O-undecylglycero-2-phosphocholine,

1-O-dodecylglycero-2-phosphocholine,

1-O-tridecylglycero-2-phosphocholine,

1-O-tetradecylglycero-2-phosphocholine,

1-O-pentadecylglycero-2-phosphocholine,

1-O-hexadecylglycero-2-phosphocholine,

1-O-heptadecylglycero-2-phosphocholine,

1-O-octadecylglycero-2-phosphocholine,

1-O-oleylglycero-2-phosphocholine,

1-O-linolylglycero-2-phosphocholine,

1-O-nonadecylglycero-2-phosphocholine and

1-O-eicosylglycero-2-phosphocholine,

it being possible to employ the lyso compounds in the natural sn-form, in the form of their mirror image isomers or in the form of racemates.

The following are examples of suitable starting compounds VI: methyl isocyanate, ethyl isocyanate, propyl isocyanate, isopropyl isocyanate, butyl isocyanate, pentyl isocyanate, hexyl isocyanate, decyl isocyanate, undecyl isocyanate, dodecyl isocyanate, tridecyl isocyanate, tetradecyl isocyanate, pentadecyl isocyanate, hexadecyl isocyanate, octadecyl isocyanate, nonadecyl isocyanate and eicosyl isocyanate.

The 1-O-alkyl-3-phosphocholines III which are employed as starting compounds are either accessible by extraction of organs (for example M. Blank et al., Biochemical and Biophysical Research Communications 90 (4), 1194 et seq. (1979)) or can be synthesised by the customary methods, for example by enzymatic cleavage (phospholipase A.sub.2) or mild alkaline hydrolysis, from the corresponding 2-O-acyl-1-O-alkylglycero-3-phosphocholines.

The 1-O-alkylglycero-2-phosphocholines IV which are employed as starting compounds can be obtained by mild alkaline hydrolysis from O-acyl-O-alkylglycero-2-phosphocholines, which can be obtained from glycerol derivatives of the formula VIII ##STR5## in which R.sup.1 has the meaning indicated in claim 1 and R.sup.4 denotes a straight-chain or branched hydrocarbon radical having 1-6 C atoms, by known phosphorilation processes, such as, for example, reaction with .beta.-bromoethylphosphoric acid dichloride in the presence of a base and subsequent treatment with trimethylamine (compare, for example, T. Muramatsu et al., Chemistry and Physics of Lipids 29, 121-127 (1981)).

The glycerol derivatives VIII are in turn accessible from 2,3-epoxypropyl ethers by reaction with the appropriate acids R.sup.4 COOH analogously to the process described for ester-alcohols by U. Zeidler, Fette, Seifen, Anstrichmittel 83 (2), 57 (1981). 2,3-Epoxy ethers are obtained from epichlorohydrins and the corresponding alcohols R.sup.1 OH, best by phase transfer catalysis in accordance with methods which are known from the literature. On the other hand, glycerol derivatives VIII can also be obtained by isomerisation from the corresponding 2-O-acylglycerol ethers IX ##STR6## for example simply by warming. The synthesis of the 2-O-acylglycerol ethers is described by K. Mangold, Angew. Chemie 91, 550-560 (1979).

1-O-Alkyl-3-O-dialkylcarbamoylglycero-2-phosphocholine can be prepared from the said lyso compounds IV by reaction with dialkylcarbamoylhalides, in particular with chlorides of the formula V ##STR7## such as, for example, N,N-dimethylcarbamoyl chloride, N-ethyl-N-methylcarbamoyl chloride, N,N-diethylcarbamoyl chloride, N-methyl-N-propylcarbamoyl chloride and N,N-dipropylcarbamoyl chloride, in inert organic solvents, such as, for example, chloroform, and also solvent mixtures, if appropriate with the addition of customary bases, such as, for example, tertiary amines, metal oxides or metal carbonates.

The preparation of the compounds according to the invention is illustrated in greater detail by means of the examples which follow. Since the compounds cannot be characterised by melting points because of their wax-like consistency, the appropriate IR data and Rf values of the substances are quoted. The IR spectra were recorded using the Perkin-Elmer 257 instrument, the substances being subjected to measurement in the form of solutions in chloroform. Thin-layer chromatography: silica gel 60F-254, may be Merck; migrating agent: chloroform/methanol/water=65/25/4 (v/v/v).

1-O-Hexadecyl-2-O-methylcarbamoylglycero-3-phosphocholine. A mixture of 50 mg of 1-O-hexadecylglycero-3-phosphocholine, 24 mg of methyl isocyanate, 50 ml of absolute chloroform and 0.1 ml of dimethylformamide is stirred at 40.degree.-60.degree. C. until the lysophospholipid can no longer be detected by thin-layer chromatography (Rf: 0.23). The solvent and excess alkyl isocyanate are removed in vacuo and the residue is purified by column chromatography (silica gel: chloroform/methanol/water).

Yield: 41 mg, Rf: 0.26, IR: 1715 cm.sup.-1.

The following are prepared analogously to these directions:

2-O-Ethylcarbamoyl-1-O-hexadecylglycero-3-phosphocholine from 50 mg of 1-O-hexadecylglycero-3-phosphocholine and 28 mg of ethyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 47 mg, Rf: 0.30, IR: 1710 cm.sup.-1.

1-O-Hexadecyl-2-O-propylcarbamoylglycero-3-phosphocholine from 50 mg of 1-O-hexadecylglycero-3-phosphocholine and 34 mg of propyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 38 mg, Rf: 0.34, IR: 1715 cm.sup.-1.

1-O-Hexadecyl-2-O-isopropylcarbamoylglycero-3-phosphocholine from 50 mg of 1-O-hexadecylglycero-3-phosphocholine and 34 mg of isopropyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 35 mg, Rf: 0.35, IR: 1716 cm.sup.-1.

2-O-Butylcarbamoyl-1-O-hexadecylglycero-3-phosphocholine from 50 mg of 1-O-hexadecylglycero-3-phosphocholine and 40 mg of butyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 40 mg, Rf: 0.37, IR: 1712 cm.sup.-1.

The following are prepared analogously to Examples 1-5:

1-O-hexadecyl-2-O-pentylcarbamoylglycero-3-phosphocholine,

1-O-hexadecyl-2-O-hexylcarbamoylglycero-3-phosphocholine,

2-O-methylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

2-O-ethylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

1-O-octadecyl-2-O-propylcarbamoylglycero-3-phosphocholine,

2-O-isopropylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

2-O-butylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

1-O-octadecyl-2-O-pentylcarbamoylglycero-3-phosphocholine and

2-O-hexylcarbamoyl-1-O-octadecylglycero-3-phosphocholine.

1-O-Hexadecyl-3-O-methylcarbamoylglycero-2-phosphocholine. A mixture of 50 mg of 1-O-hexadecylglycero-2-phosphocholine, 24 mg of methyl isocyanate, 5 ml of absolute chloroform and 0.1 ml of dimethylformamide is stirred at 40.degree.-60.degree. C. until the lysophospholipid can no longer be detected by thin-layer chromatography (Rf: 0.23). The solvent and excess methyl isocyanate are removed in vacuo and the residue is purified by column chromatography (silica gel/chloroform/methanol/water).

Yield: 45 mg, Rf: 0.26, IR: 1712 cm.sup.-1.

The following are prepared analogously to these directions:

3-O-Ethylcarbamoyl-1-O-hexadecylglycero-2-phosphocholine from 50 mg of 1-O-hexadecylglycero-2-phosphocholine and 28 mg of ethyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 49 mg, Rf: 0.30, IR: 1715 cm.sup.-1.

1-O-Hexadecyl-3-O-propylcarbamoylglycero-2-phosphocholine from 50 mg of 1-O-hexadecylglycero-2-phosphocholine and 34 mg of propyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 40 mg, Rf: 0.33, IR: 1710 cm.sup.-1.

1-O-Hexadecyl-3-O-isopropylcarbamoylglycero-2-phosphocholine from 50 mg of 1-O-hexadecylglycero-2-phosphocholine and 34 mg of isopropyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 30 mg, Rf: 0.34, IR: 1715 cm.sup.-1.

3-O-Butylcarbamoyl-1-O-hexadecylglycero-2-phosphocholine from 50 mg of 1-O-hexadecylglycero-2-phosphocholine and 40 mg of butyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 35 mg, Rf: 0.37, IR: 1710 cm.sup.-1.

3-O-Methylcarbamoyl-1-O-octadecylglycero-2-phosphocholine from 50 mg of 1-O-octadecylglycero-2-phosphocholine and 24 mg of methyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 40 mg, Rf: 0.27, IR: 1715 cm.sup.-1.

3-O-Ethylcarbamoyl-1-O-octadecylglycero-2-phosphocholine from 50 mg of 1-O-octadecylglycero-2-phosphocholine and 28 mg of ethyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 45 mg, Rf: 0.30, IR: 1712 cm.sup.-1.

1-O-Octadecyl-3-O-propylcarbamoylglycero-2-phosphocholine from 50 mg of 1-O-octadecylglycero-2-phosphocholine and 34 mg of propyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 35 mg, Rf: 0.34, IR: 1715 cm.sup.-1.

3-O-isopropylcarbamoyl-1-O-octadecylglycero-2-phosphocholine from 50 mg of 1-O-octadecylglycero-2-phosphocholine and 34 mg of isopropyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 32 mg, Rf: 0.34, IR: 1715 cm.sup.-1.

3-O-Butylcarbamoyl-3-O-octadecylglycero-2-phosphocholine from 50 mg of 1-O-octadecylglycero-2-phosphocholine and 40 mg of butyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 38 mg, Rf: 0.38, IR: 1712 cm.sup.-1.

3-O-Dimethylcarbamoyl-1-O-octadecylglycero-2-phosphocholine.

A mixture of 50 mg of 1-O-octadecylglycero-2-phosphocholine, 20 ml of dimethylcarbamoyl chloride and 55 mg of silver carbonate in 5 ml of chloroform is stirred for 24 hours at 50.degree. C., the solvent is removed in vacuo and the residue is purified by column chromatography (silica gel: chloroform/methanol/water).

Yield: 35 mg, Rf: 0.47.

The following is prepared analogously to these directions:

3-O-Dimethylcarbamoyl-1-O-hexadecylglycero-2-phosphocholine from 50 mg of 1-O-hexadecylglycero-2-phosphocholine, 21 mg of dimethylcarbamoyl chloride and 55 mg of Ag.sub.2 CO.sub.3 in 5 ml of chloroform.

Yield: 40 mg, Rf: 0.46.

The following are prepared analogously to

1-O-hexadecyl-3-O-pentylcarbamoylglycero-2-phosphocholine,

1-O-hexadecyl-3-O-hexylcarbamoylglycero-2-phosphocholine,

1-O-octadecyl-3-O-pentylcarbamoylglycero-2-phosphocholine,

3-O-hexylcarbamoyl-1-O-octadecylglycero-2-phosphocholine,

1-O-linolyl-3-O-methylcarbamoylglycero-2-phosphocholine,

3-O-ethylcarbamoyl-1-O-linolylglycero-2-phosphocholine,

1-O-linolyl-3-O-propylcarbamoylglycero-2-phosphocholine,

3-O-butylcarbamoyl-1-O-linolylglycero-2-phosphocholine,

1-O-linolyl-3-O-pentylcarbamoylglycero-2-phosphocholine,

3-O-hexylcarbamoyl-1-O-linolylglycero-2-phosphocholine,

3-O-methylcarbamoyl-1-O-oleylglycero-2-phosphocholine,

3-O-ethylcarbamoyl-1-O-oleylglycero-2-phosphocholine,

1-O-oleyl-3-O-propylcarbamoylglycero-2-phosphocholine,

3-O-butylcarbamoyl-1-O-oleylglycero-2-phosphocholine,

1-O-oleyl-3-O-pentylcarbamoylglycero-2-phosphocholine and

3-O-hexylcarbamoyl-1-O-oleylglycero-2-phosphocholine.

1-O-Hexadecyl-2-O-hexadecylcarbamoylglycero-3-phosphocholine.

A mixture of 50 mg of 1-O-hexadecylglycero-3-phosphocholine, 107 mg of hexadecyl isocyanate, 5 ml of chloroform and 0.1 ml of dimethylformamide is stirred at 60.degree. C. for 48 hours. The excess alkyl isocyanate is hydrolysed by adding a little water and the mixture is concentrated in vacuo to a large extent. The residue is purified by preparative thin-layer chromatography (silica gel: chloroform/methanol/water=65/25/4).

Yield: 45 mg, Rf: 0.5, IR: 1710 cm.sup.-1.

The following are prepared analogously:

1-O-hexadecyl-2-O-octadecylcarbamoylglycero-3-phosphocholine,

2-O-hexadecylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

1-O-octadecyl-2-O-octadecylcarbamoylglycero-3-phosphocholine,

2-O-decylcarbamoyl-1-O-hexadecylglycero-3-phosphocholine,

1-O-hexadecyl-2-O-undecylcarbamoylglycero-3-phosphocholine,

2-O-dodecylcarbamoyl-1-O-hexadecylglycero-3-phosphocholine,

1-O-hexadecyl-2-O-tetradecylcarbamoylglycero-3-phosphocholine,

2-O-eicosylcarbamoyl-1-O-hexadecylglycero-3-phosphocholine,

2-O-decylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

1-O-octadecyl-2-O-undecylcarbamoylglycero-3-phosphocholine,

2-O-dodecylcarbamoyl-1-O-octadecylglycero-3-phosphocholine,

1-O-octadecyl-2-O-tetradecylcarbamoylglycero-3-phosphocholine and

2-O-eicosylcarbamoyl-1-O-octadecylglycero-3-phosphocholine.

1-O-Hexadecyl-3-O-hexadecylcarbamoylglycero-2-phosphocholine.

A mixture of 50 mg of 1-O-hexadecylglycero-2-phosphocholine, 107 mg of hexadecyl isocyanate, 5 ml of chloroform and 0.1 ml of dimethylformamide is stirred at 60.degree. C. for 48 hours. The excess alkyl isocyanate is hydrolysed by adding a little water and the mixture is concentrated in vacuo to a large extent. The residue is purified by preparative thin-layer chromatography (silica gel: chloroform/methanol/water=65/25/4).

Yield: 52 mg, Rf: 0.5, IR: 1712 cm.sup.-1.

The following are prepared analogously to these directions:

1-O-Hexadecyl-3-O-octadecylcarbamoylglycero-2-phosphocholine from 50 mg of 1-O-hexadecylglycero-2-phosphocholine and 120 mg of octadecyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 61 mg, Rf: 0.5, IR: 1715 cm.sup.-1.

3-O-Hexadecylcarbamoyl-1-O-octadecylglycero-2-phosphocholine from 50 mg of 1-O-octadecylglycero-2-phosphocholine and 100 mg of hexadecyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 48 mg, Rf: 0.51, IR: 1710 cm.sup.-1.

1-O-Octadecyl-3-O-octadecylcarbamoylglycero-2-phosphocholine from 50 mg of 1-O-octadecylglycero-2-phosphocholine and 120 mg of octadecyl isocyanate in 5 ml of chloroform and 0.1 ml of dimethylformamide.

Yield: 54 mg, Rf: 0.52, IR: 1712 cm.sup.-1.

The following are prepared analogously to Examples 19-22:

3-O-decylcarbamoyl-1-O-hexadecylglycero-2-phosphocholine,

1-O-hexadecyl-3-O-undecylcarbamoylglycero-2-phosphocholine,

3-O-dodecylcarbamoyl-1-O-hexadecylglycero-2-phosphocholine,

1-O-hexadecyl-3-O-tetradecylcarbamoylglycero-2-phosphocholine,

3-O-eicosylcarbamoyl-1-O-hexadecylglycero-2-phosphocholine,

1-O-decylcarbamoyl-3-O-octadecylglycero-2-phosphocholine,

1-O-octadecyl-3-O-undecylcarbamoylglycero-2-phosphocholine,

3-O-dodecylcarbamoyl-1-O-octadecylglycero-2-phosphocholine,

1-O-octadecyl-3-O-tetradecylcarbamoylglycero-2-phosphocholine,

3-O-eicosylcarbamoyl-1-O-octadecylglycero-2-phosphocholine,

3-O-hexadecylcarbamoyl-1-O-oleylglycero-2-phosphocholine and

3-O-hexadecylcarbamoyl-1-O-linoleyl-2-phosphocholine.