Induced Axial Chirality in Biocatalytic Asymmetric Ketone Reduction
作者:Rubén Agudo、Gheorghe-Doru Roiban、Manfred T. Reetz
DOI:10.1021/ja3092517
日期:2013.2.6
Catalytic asymmetric reduction of prochiral ketones of type 4-alkylidene cyclohexanone with formation of the corresponding axially chiral R-configurated alcohols (up to 99% ee) was achieved using alcohol dehydrogenases, whereas chiral transition-metal catalysts fail. Reversal of enantioselectivity proved to be possible by directedevolution based on saturation mutagenesis (up to 98% ee (S)). Utilization
使用醇脱氢酶实现了 4-亚烷基环己酮的前手性酮的催化不对称还原,并形成相应的轴向手性 R 构型醇(高达 99% ee),而手性过渡金属催化剂则失败。通过基于饱和诱变(高达 98% ee (S))的定向进化,证明可以逆转对映选择性。使用带有乙烯基溴部分的酮可以将相应的 R-和 S-醇用作 Pd 催化级联反应中的关键化合物。