Optically active alcohols represented by the formula:
wherein X indicates an alkyl group having a carbon number of 2-10, Y indicates an alkyl group having a carbon number of 1-3, CF3 or CN, and X ≠ Y, have optical isomers, so that these alcohols do not sufficiently exhibit activity in many cases unless either R- or S-alcohol is purely contained. The production of the pure R- or S-alcohol was restricted to a few methods, so it is desired to develop a method for optically resolving of the secondary alcohols by an industrially advantageous method.
This invention comprises using a particular enzyme having the ability to conduct preferentially a transesterification reaction with a triglyceride and an (R, S)-alcohol represented by the above formula and the triglyceride to conduct the transesterification reaction under substantially anhydrous conditions and resolving the resulting ester to obtain an optically active alcohol which contains richly either R- or S-alcohol.
由式表示的光学活性醇:
其中 X 表示碳原子数为 2-10 的烷基,Y 表示碳原子数为 1-3 的烷基、
CF3 或 CN,且 X≠Y 具有光学异构体,因此在许多情况下,除非纯粹含有 R-或 S-醇,否则这些醇不能充分显示出活性。纯 R-或 S-醇的生产仅限于少数几种方法,因此,人们希望开发一种在工业上有利的方法,对仲醇进行光学解析。
本发明包括使用一种特殊的酶,该酶具有优先与
甘油三酯和由上式表示的(R,S)醇进行酯交换反应的能力,并使用
甘油三酯在基本上无
水的条件下进行酯交换反应,并解析所得到的酯,以获得光学活性醇,该醇富含 R-或 S-醇。