(<i>S</i>
)-Selectivity in Phenylacetyl Carbinol Synthesis Using the Wild-Type Enzyme Acetoin:Dichlorophenolindophenol Oxidoreductase from <i>Bacillus licheniformis</i>
作者:Pier Paolo Giovannini、Lindomar Alberto Lerin、Michael Müller、Giovanni Bernacchia、Morena De Bastiani、Martina Catani、Graziano Di Carmine、Alessandro Massi
DOI:10.1002/adsc.201600359
日期:2016.9.1
well known biocatalysts for the asymmetric synthesis of α‐hydroxy ketones with preferential (R)‐selectivity. Pharmaceutically relevant phenylacetyl carbinol (PAC) has been prepared with absolute (S)‐configuration only on a few occasions using enzyme variants suitably designed through rational site‐directed mutagenesis approaches. Herein, we describe the synthesis of (S)‐phenylacetyl carbinol products with
硫胺素二磷酸(ThDP)依赖的酶是众所周知的生物催化剂,具有优先(R)-选择性的不对称合成α-羟基酮。药物相关的苯乙酰甲醇(PAC)仅在少数情况下使用通过合理的定点诱变方法适当设计的酶变体制备而成,具有绝对(S)构型。本文中,我们描述了利用地衣芽孢杆菌中现成的野生型ThDP依赖性酶乙酰化酶:二氯苯酚吲哚酚氧化还原酶(Ao:DCPIP OR)合成具有扩展反应范围的(S)-苯乙酰甲醇产物。在半制备规模上,甲基乙酰丙酮(供体)和不同取代的苯甲醛的类似跨安息香的缩合以几乎完全的化学选择性进行,从而产生具有高转化效率的目标(S)-1-羟基-1-苯基丙烷-2-酮衍生物(向上至95%)和良好的对映选择性(高达99%)。Ao:DCPIP OR可以接受羟基和硝基苯甲醛,以及空间要求苛刻的底物,例如1-萘甲醛和4-(叔丁基)苯甲醛,它们在酶促转化中通常是较差的受体。的探索合成(小号DCPIP OR:)-phe