[EN] PROCESS FOR THE PREPARATION OF AN ENANTIOMERICALLY ENRICHED THIO COMPOUND<br/>[FR] PROCEDE DE PREPARATION D'UN COMPOSE THIO ENANTIOMERIQUEMENT ENRICHI
申请人:DSM NV
公开号:WO2003051827A1
公开(公告)日:2003-06-26
The invention relates to a process for the preparation of an enantiomerically enriched compound of formula (1) or a salt thereof, in which R?1 and R2¿ each independently represent an (hetero)alkyl or (hetero)aryl group, wherein R1-C(O)-SH or a salt thereof, with R1 as defined above, is reacted with R2-C(C=CH¿2?)-C(O)OH with R?2¿ as defined above, wherein the reaction takes place in the presence of catalyst is an enantiomerically enriched Lewis acid containing a transition metal chosen from the group of Ti, Zr and Hf or a combination thereof and at least one enantiomerically enriched ligand, and in the presence of an alkali metal ion, an alkaline earth metal ion or an ammonium ion.