(2R,3E)-4-halo-3-buten-2-ols are produced by kinetic resolution of racemates from the corresponding racemates. The racemate is esterified by reaction with a carboxylic acid derivative, preferably with chloroacetyl chloride. Then the (R)-ester is enantioselectively hydrolyzed with a lipase from Pseudomonas fluorescens. The corresponding (2R,3E)-4-halo-3-buten-2-ol also can be obtained from the remaining (S)-ester after separation. The compounds are chiral synthesis structural elements for the production of optically active natural substances.
(2R,3E)-4-卤代-
3-丁烯-2-醇是通过对应的混合物的对映体进行动力学拆分而生产的。混合物通过与
羧酸衍
生物反应酯化,优选使用
氯乙酰氯。然后,使用来自荧光假单胞菌的
脂肪酶对(R)-酯进行对映选择性
水解。在分离后,也可以从剩余的(S)-酯中获得相应的(2R,3E)-4-卤代-
3-丁烯-2-醇。这些化合物是手性合成结构单元,用于生产光学活性天然物质。