A novel approach to enantiopure cyclopropane compounds from biotransformation of nitrilesElectronic supplementary information (ESI) available: preparation of racemic nitrile, amides and acids; spectroscopic data of racemic nitriles; biotransformation of racemic amides; chiral HPLC analyses of nitriles, amides, acids and amines. See http://www.rsc.org/suppdata/nj/b2/b200110a/
作者:Mei-Xiang Wang、Guo-Qiang Feng
DOI:10.1039/b200110a
日期:2002.10.30
Rhodococcus sp. AJ270, a powerful and versatile nitrile hydratase/amidase containing microbial whole-cell system, catalyzed the enantioselective hydrolysis of both racemic trans- and cis-2-arylcyclopropanecarbonitriles to afford the corresponding amides and acids with enantiomeric excesses as high as >99%. The reaction rate and enantioselectivity observed for both nitrile hydratase and amidase were also strongly dependent upon the nature of the substituent and substitution pattern on the benzene ring of the substrates. The application of and the advantages of biotransformation of nitriles were demonstrated by preparing (1S,2R)-2-phenylcyclopropylamine and (1R,2R)-2-phenylcyclopropylmethylamine through facile and straightforward chemical manipulations of (1S,2S)-2-phenylcyclopropanecarboxylic acid and (1R,2R)-2-phenylcyclopropanecarboxamide, respectively.
Rhodococcus sp. AJ270 是一种功能强大、用途广泛的腈水解酶/酰胺酶,含有微生物全细胞系统,可催化外消旋反式和顺式-2-芳基环丙烷甲腈的对映选择性水解,生成相应的酰胺和酸,对映过量高达 99%以上。腈水解酶和酰胺酶的反应速率和对映体选择性还与底物苯环上取代基的性质和取代模式密切相关。通过对(1S,2S)-2-苯基环丙烷羧酸和(1R,2R)-2-苯基环丙烷甲酰胺进行简单直接的化学处理,分别制备出(1S,2R)-2-苯基环丙胺和(1R,2R)-2-苯基环丙基甲胺,证明了腈类生物转化的应用和优势。