Preparation of enantiomerically enriched aromatic β-hydroxynitriles and halohydrins by ketone reduction with recombinant ketoreductase KRED1-Pglu
作者:Martina L. Contente、Immacolata Serra、Francesco Molinari、Raffaella Gandolfi、Andrea Pinto、Diego Romano
DOI:10.1016/j.tet.2016.05.027
日期:2016.7
A NADPH-dependent benzil reductase (KRED1-Pglu) was used as recombinant enzyme for catalysing the reduction of different functionalised ketones. The reactions were carried out in the presence of a catalytic amount of NADP+ and an enzyme-coupled transformation (oxidation of glucose catalysed by glucose dehydrogenase), for regenerating the cofactor and thus driving the reaction to completion. KRED1-Pglu
NADPH依赖的苯甲酰还原酶(KRED1-Pglu)被用作重组酶,用于催化不同功能化酮的还原。反应在催化量的NADP +存在下进行酶偶联转化(葡萄糖脱氢酶催化的葡萄糖氧化),用于再生辅因子,从而驱动反应完成。KRED1-Pglu具有出色的通用性,能够在不同的pH值下还原不同的β-酮腈和α-卤代酮。值得注意的是,根据底物的性质,KRED1-Pglu可用于高效,清洁的酶促还原反应,避免了由于培养基pH引起的副反应。还原通常以高对映选择性发生,从而可以高产率制备对映体富集的β-羟基腈和卤代醇。在所有情况下,减少的立体化学结果均遵循所谓的Prelog规则。