Facile Synthesis of Enantiopure 4-Substituted 2-Hydroxy-4- butyrolactones using a Robust<i>Fusarium</i>Lactonase
作者:Bing Chen、Hai-Feng Yin、Zhen-Sheng Wang、Jian-He Xu、Li-Qiang Fan、Jian Zhao
DOI:10.1002/adsc.200900628
日期:2009.11
A facile chemo-enzymatic process has been developed for producing stereoisomers of 4-substituted 2-hydroxy-4-butyrolactones with good to excellent enantioselectivity. This process involves an easy separation of the diastereoisomers by column chromatography and efficient enzymatic resolution by whole cells of Escherichia coli JM109 expressing Fusarium proliferatum lactonase gene. This biocatalyst shows
已经开发了一种容易的化学酶促方法,用于生产具有良好至优异对映选择性的4-取代的2-羟基-4-丁内酯的立体异构体。此过程涉及通过柱色谱法轻松分离非对映异构体,并通过表达枯萎镰刀菌的大肠杆菌JM109的全细胞有效地进行酶促拆分内酯酶基因。该生物催化剂显示出对不同底物结构的强耐受性,并且可以优异的对映体纯度获得至少四种可能的异构体中的三种。检查了不同的底物浓度(10 mM–200 mM),使底物与催化剂的比例高达26:1。这种通用而有效的酶促方法使人们可以容易且经济地获得4-取代的2-羟基-4-丁内酯的立体异构体。根据NMR,X射线衍射和圆二色性系统地进行了立体化学分配,从而进一步了解了该酶的立体选择性。