申请人:SYNGENTA PARTICIPATIONS AG
公开号:US20160108001A1
公开(公告)日:2016-04-21
The present invention relates to a process for the enantioselective preparation of the compound of formula (Ib), which process comprises a) reducing the (E)- or (Z)-form of a compound of formula (II), with an enantioselective reagent to a compound of formula (IIIa), and b) acylating the compound of formula (IIIa) with the compound of formula (IV), or c) coupling the compound of formula (IV) with the compound of formula (II), to give a compound of formula (V) and d) reducing compound of formula (V) in the presence of hydrogen, a catalyst and a chiral ligand, to the compound of formula (Ib).
本发明涉及一种手性选择性制备式(Ib)化合物的方法,该方法包括a)使用手性选择性试剂还原式(II)化合物的(E)-或(Z)-形式为式(IIIa)化合物,b)用式(IV)化合物对式(IIIa)化合物进行酰化,或c)将式(IV)化合物与式(II)化合物偶联,得到式(V)化合物,d)在氢气、催化剂和手性配体的存在下还原式(V)化合物为式(Ib)化合物。