作者:Sandra F. Mayer、Andreas Steinreiber、Romano V. A. Orru、Kurt Faber
DOI:10.1002/1099-0690(200112)2001:23<4537::aid-ejoc4537>3.0.co;2-e
日期:2001.12
rac-trans-haloalkyl epoxides 1a−8a using the epoxide hydrolase activity of whole bacterial cells furnished the corresponding vicinal diols 1b−8b as intermediates; these (spontaneously) underwent ring closure to yield cyclic products 1c−6c through an enzyme-triggered cascade reaction. In particular, cis-configured substrates (1a, 3a, 5a, 7a) were transformed in an enantioconvergent fashion, which resulted
使用整个细菌细胞的环氧水解酶活性对 2,3-二取代外消旋-顺-和外消旋-反-卤代烷基环氧化物 1a-8a 进行生物催化水解,得到相应的邻位二醇 1b-8b 作为中间体;这些(自发地)经历闭环以通过酶触发的级联反应产生环状产物 1c-6c。特别是,顺式构型的底物(1a、3a、5a、7a)以对映收敛方式转化,导致从外消旋体中形成 100% des 和高达 92% ees 的单一立体异构产物。