Asymmetric reaction catalyst and method for preparing optically active compound using the same
AssigneeJapan Science and Technology Agency
InventorsShu Kobayashi, Haruro Ishitani, Yasuhiro Yamashita
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Abstract
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 RI is a hydrogen atom, a halogen atom, a trifluoromethyl group, or an alkyl group or alkoxy group having at most 4 carbons.
Claims10
An asymmetric reaction catalyst obtained by mixing a pentavalent niobium compound and tetraol having an optically active binapthol structure of R or S configuration, wherein the asymmetric reaction catalyst can catalyze an asymmetric reaction selected from the group consisting of an asymmetric Mannich reaction, an epoxide asymmetric ring opening reaction, an asymmetric allylation reaction, an asymmetric cyanation reaction and an asymmetric alkylation reaction.
Dependencies are inferred from the claim text.