Chemo- and Stereodivergent Preparation of Terminal Epoxides and Bromohydrins through One-Pot Biocatalysed Reactions: Access to Enantiopure Five- and Six-Membered N-Heterocycles
作者:Fabricio R. Bisogno、Aníbal Cuetos、Alejandro A. Orden、Marcela Kurina-Sanz、Iván Lavandera、Vicente Gotor
DOI:10.1002/adsc.201000353
日期:——
Different enantiopure terminal epoxides or bromohydrins have chemoselectively been synthesised in one‐pot starting from the corresponding α‐bromo ketones through alcohol dehydrogenase (ADH)‐catalysed processes adding an organic co‐solvent and tuning appropriately the medium pH and the temperature. Thus, at neutral pH enantiopure bromohydrins were obtained while using basic conditions (pH 9.5–10) epoxides
从相应的α-溴代酮开始,通过醇脱氢酶(ADH)催化的过程,通过添加有机助溶剂并适当调节介质的pH和温度,在一锅中化学选择性地合成了不同的对映纯末端环氧化物或溴代醇。因此,在碱性条件下(pH 9.5-10),在中性pH值下可获得对映纯的溴代醇,而环氧化物是主要产物。此外,通过简单地选择生物催化剂,可以实现化学和立体发散转化,从而获得例如对映体纯的脯氨醇或哌啶子蛋白-3-醇。