Enantioselective Biotransformations of Racemic and Meso Pyrrolidine-2,5-dicarboxamides and Their Application in Organic Synthesis
作者:Peng Chen、Ming Gao、De-Xian Wang、Liang Zhao、Mei-Xiang Wang
DOI:10.1021/jo300412j
日期:2012.4.20
(2R,5R)-5-carbamoylpyrrolidine-2-carboxylic acid in high yields and excellent enantioselectivity. Biocatalytic desymmetrization of meso cis-pyrrolidinedicarboxamide afforded enantiomerically pure (2R,5S)-5-carbamoylpyrrolidine-2-carboxylic acid in an almost quantitative yield. In both kinetic resolution and desymmetrization, the amidase always exhibited excellent 2R-enantioselectivity, although its catalytic
在本文中,我们报道了酰胺酶催化的吡咯烷-2,5-二甲酰胺的水解及其在有机合成中的应用。在红球菌红球菌AJ270的催化下,将含有酰胺全酶的微生物全细胞催化剂,外消旋的反式-吡咯烷-2,5-甲酰胺动力学拆分为(2 S,5 S)-吡咯烷-2,5-二甲酰胺和(2 R,5 R)-5-氨基甲酰基吡咯烷-2-羧酸的高收率和优异的对映选择性。生物催化脱对称的内消旋顺式-吡咯烷二甲酰胺提供对映体纯的(2 R,5 S)-5-氨基甲酰基吡咯烷-2-羧酸的产率几乎是定量的。在动力学拆分和去对称化方面,酰胺酶始终表现出优异的2 R-对映选择性,尽管其催化效率受吡咯烷环氮原子上取代基的空间效应影响很大。通过可扩展的制备(2 R,5 R)-和(2 R,5 S)-5-氨基甲酰基吡咯烷-2-羧酸及其转化为氮杂核苷类似物和类似药物的吡咯啉的方法,证明了生物转化的合成潜力。diazepin-11(5 H)-one化合物。