AN OPTICALLY ACTIVE BORANE COMPLEX AND A METHOD FOR PRODUCING AN OPTICALLY ACTIVE ALCOHOL DERIVATIVE BY THE USE THEREOF

摘要

An optically active borane complex represented by the general formula,

wherein R<1> represents an aryl group, R<2> represents an alkyl group and a mark * means an asymmetric carbon, is capable of producing optically active alcohol derivatives by the reduction of prochiral ketones with the borane complex. The optically active alcohol derivative is useful for fungicides, herbicides or plant growth regulators.