An asymmetric reaction catalyst is obtained by mixing a pentavalent niobium compound and an optically active triol or tetraol having a binaphthol structure of R or s configuration, and the triol is represented by the following formula:
wherein, Y is divalent hydrocarbon and R
I
is a hydrogen atom, a halogen atom, a trifluoromethyl group, or an alkyl group or alkoxy group having at most 4 carbons.
一种不对称反应催化剂是通过混合五价
铌化合物和具有R或s构型的二
萘酚结构的手性三醇或四醇而获得的,其中三醇的表示式如下:
其中,Y为二价碳氢化合物,RI为氢原子、卤素原子、三
氟甲基基团或最多具有4个碳的烷基或烷氧基。