Chiral Chlorohydrins from the Biocatalyzed Reduction of Chloroketones: Chiral Building Blocks for Antiretroviral Drugs
作者:Amanda S. de Miranda、Robert C. Simon、Barbara Grischek、Gabriel C. de Paula、Bruno A. C. Horta、Leandro S. M. de Miranda、Wolfgang Kroutil、C. Oliver Kappe、Rodrigo O. M. A. de Souza
DOI:10.1002/cctc.201403023
日期:2015.3
biocatalysts for the stereoselective reduction of chloroketones 5 a–d, the corresponding halohydrins 6 a–d of which are building blocks in the synthesis of antiretroviral drugs. Among them, ADH from Sphingobium yanoikuyae was found to reduce chloroketone 5 c with a high stereoselectivity (90 % de) and conversion (85 %) to furnish threo halohydrin (R,S)‐6 c. ADH from Ralstonia sp. (RasADH) was able to
大肠杆菌含有过表达的酒精脱氢酶(的ADH)细胞进行筛选作为生物催化剂的立体选择性还原的氯代酮5 - d,相应的卤代醇6 - d这些都积木在抗逆转录病毒药物的合成。其中,从ADH Sphingobium yanoikuyae发现以减少氯酮5℃具有高立体选择性(90%德)以及转化率(85%),得到苏型卤代醇([R ,小号) - 6c中。来自Ralstonia sp。的ADH 。(RasADH)减少了5 a和图5b具有互补非对映选择性,以提供接入到两个苏型和赤型通过“基于基底的”立体控制的卤代醇。所述RasADH催化还原进行了优化,以提供(- [R ,小号) - 6有98%转化率和84%对映体过量(DE)和(小号,小号) - 6b中以95%的转化率和86%去。分子模型研究表明,与叔丁基醚相比,具有羧基苄基保护基的5 b能够以“转化”模式结合到酶催化位点‐丁氧基羰基和甲氧基羰基保护的底物5a和5c