Patent ID: 6979747

Claim:
A process for the preparation of a compound of general formula: in which: R and R′ independently represent a linear or branched C 1 -C 7 alkyl radical or an aryl group which is unsubstituted or substituted by one or more radicals chosen from halogens, linear or branched C 1 -C 3 alkyl radicals and —OH radicals; R″ is hydrogen or a CO—R 1 group in which R 1 is a linear or branched C 1 -C 7 alkyl radical or an aryl group which is unsubstituted or substituted by one or more radicals chosen from halogens, linear or branched C 1 -C 3 alkyl radicals and —OH radicals; and the dimers formed by a disulfide bridge from one and/or other of the two sulfur atoms of the compounds of general formula I composed of the R″ radicals or of the R′CO— radicals of the two molecules, and the corresponding thiazolidine forms; said process comprising the following stages: a) protection of the N-acyl-L-cysteine to provide the N-acyl-S-trityl-L-cysteine compound; then b) coupling of the protected N-acyl-S-trityl-L-cysteine with the S-acetylcysteamine hydrochloride to provide the N-(N-acyl-S-trityl-L-cysteinyl)-S-acylcysteamine compound.