PROCEDURES FOR ASYSTERIC SYNTHESIS OF S-ACYLIDATED DERIVATIVES OF 2-MERCAPTOMETHYL-3-PHENYLPROPInoic acid AND THEIR USE FOR THE synthesis of N-MERCAPTOACYL AMINOSE DERIVATIVES

摘要

PCT No. PCT/FR97/00218 Sec. 371 Date Nov. 26, 1997 Sec. 102(e) Date Nov. 26, 1997 PCT Filed Feb. 4, 1997 PCT Pub. No. WO97/29086 PCT Pub. Date Aug. 14, 1997Process for the asymmetric synthesis of S-acyl derivatives of 2-mercaptomethyl-3-phenylpropanoic acid of formula (I): characterized in that it comprises the steps consisting in: a) preparing the diol (VI) by reduction of a malonic ester (V) in the presence of a hydride; b) preparing the monoacetates (VII R) or (VII S) respectively; c) subjecting these monoacetates to an oxidation in order to form the acids (IX S) or (IX R); d) saponifying the compounds (IX S) or (IX R) in order to form the hydroxy acids (X S) or (X R); e) thioacylating the hydroxy acids (X S) or (X R) with a mercapto acid R1SH (XI), according to a Mitsunobu-type reaction, in order to lead to the desired acids (I R) (I S) respectively and application to the synthesis of N-(mercaptoacyl)amino acid derivatives (II).