手性是自然界的普遍特征 .手性药物的研制和开发 ,是现代制药行业发展的一种必然趋势 ,也是药物研究和开发中急待解决的重大课题 .利用酶的手性合成和制备手性药物中间体是当今国外医药研究的热点 .光学活性氰醇是一类重要的手性合成子 ,它很容易转化为β-氨基醇、α-羟基酸、 Chirality is a common feature in nature.Chiral drug development and development is an inevitable trend in the development of the modern pharmaceutical industry and also an important issue to be solved urgently in drug research and development.Using the chiral synthesis of enzymes and preparation of chiral Pharmaceutical intermediates are the focus of current medical research in foreign countries. Optically active cyanohydrin is a kind of important chiral synthon which can be easily converted into β-amino alcohol, α-hydroxy acid,