申请人:DSM N.V.
公开号:EP1325908A1
公开(公告)日:2003-07-09
The invention relates to a process for the preparation of an enantiomerically enriched compound of formula 1 or a salt thereof, in which R1 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=CH2)-C(O)OH with R2 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.
该发明涉及一种制备式1的对映富集化合物或其盐的过程,其中R1和R2各自独立表示(hetero)alkyl或(hetero)aryl基团,其中R1-C(O)-SH或其盐,其中R1如上定义,与R2-C(C=CH2)-C(O)OH反应,其中R2如上定义,反应在存在催化剂的情况下进行,所述催化剂是对映富集的含有过渡金属的Lewis酸,所述过渡金属选择自Ti、Zr和Hf组合以及至少一种对映富集的配体,以及存在碱金属离子、碱土金属离子或铵离子。