申请人:——
公开号:US20020151744A1
公开(公告)日:2002-10-17
One aspect of the present invention relates to a method for the kinetic resolution of racemic and diastereomeric mixtures of chiral compounds. The critical elements of the method are: a non-racemic chiral tertiary-amine-containing catalyst; a racemic or diastereomeric mixture of a chiral substrate, e.g., a cyclic carbonate or cyclic carbamate; and a nucleophile, e.g., an alcohol, amine or thiol. A preferred embodiment of the present invention relates to a method for achieving the kinetic resolution of racemic and diastereomeric mixtures of derivatives of &agr;- and &bgr;-amino, hydroxy, and thio carboxylic acids. In certain embodiments, the methods of the present invention achieve dynamic kinetic resolution of a racemic or diastereomeric mixture of a substrate, i.e., a kinetic resolution wherein the yield of the resolved enantiomer or diastereomer, respectively, exceeds the amount present in the original mixture due to the in situ equilibration of the enantiomers or diastereomers under the reaction conditions prior to the resolution step.
本发明的一个方面涉及一种用于立体化合物的消旋和对映异质混合物的动力学分离的方法。该方法的关键要素包括:非消旋手性三级胺催化剂;手性底物的消旋或对映异构混合物,例如环碳酸酯或环氨基甲酸酯;以及亲核试剂,例如醇、胺或硫醇。本发明的一种优选实施例涉及一种用于实现对α-和β-氨基、羟基和硫代羧酸衍生物的消旋和对映异质混合物的动力学分离的方法。在某些实施例中,本发明的方法实现了底物的动态动力学分离,即消旋或对映异构混合物的动力学分离,在该分离步骤之前,在反应条件下对映异构体的原始混合物中的分离对映异构体的产率分别超过原始混合物中存在的量,因为在分离步骤之前在原位平衡对映异构体。