PROCESS FOR THE STEREOSELECTIVE PREPARATION OF A PYRAZOLE-CARBOXAMIDE
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).
[EN] PROCESS FOR THE STEREOSELECTIVE PREPARATION OF A PYRAZOLE-CARBOXAMIDE<br/>[FR] PROCÉDÉ DE PRÉPARATION STÉRÉOSÉLECTIVE D'UN PYRAZOLECARBOXAMIDE
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2014206855A1
公开(公告)日:2014-12-31
The present invention relates to a process for the enantioselective preparation of the compound of formula (lb), 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 (IlIa), and b) acylating the compound of formula (IlIa) 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 (lb).