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
1
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构型的具有二
萘酚结构的光学活性三元醇或四元醇获得的,其中三元醇由以下公式表示:(其中,Y为双价碳氢化合物,R1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)。