Reductions of cyclic β-keto esters by individual Saccharomyces cerevisiae dehydrogenases and a chemo-enzymatic route to (1R,2S)-2-methyl-1-cyclohexanol
作者:Santosh Kumar Padhi、Iwona A. Kaluzna、Didier Buisson、Robert Azerad、Jon D. Stewart
DOI:10.1016/j.tetasy.2007.08.010
日期:2007.9
Twenty purified dehydrogenases cloned from bakers’ yeast (Saccharomyces cerevisiae) and expressed as fusion proteins with glutathione (S)-transferase were tested for their ability to reduce three homologous cyclic β-keto esters. The majority of dehydrogenases reduced ethyl 2-oxo-cyclopentanecarboxylate, yielding a pair of diastereomeric alcohols with consistent (1R)-stereochemistry. Ethyl 2-oxo-cy
测试了从面包酵母(Saccharomyces cerevisiae)克隆并表达为与谷胱甘肽(S)-转移酶融合蛋白的20种纯化的脱氢酶还原三种同源环状β-酮酯的能力。大多数脱氢酶还原2-氧代-环戊烷甲酸乙酯,产生一对具有一致的(1 R)-立体化学的非对映异构醇。2-氧代-环己烷甲酸乙酯的还原仅提供顺式-醇对映体。集合中的两种酶均接受2-氧代-环庚烷甲酸乙酯,两者均主要产生顺式-(1 R,2 S)-醇。大肠杆菌过量表达YDL124w基因的细胞用于动态动力学拆分2-氧代-环己烷甲酸乙酯,以生产化学合成重要的手性化合物(1 R,2 S)-2-甲基-1-环己醇的关键中间体积木。