Imine Reductase‐Catalyzed Enantioselective Reduction of Bulky α,β‐Unsaturated Imines en Route to a Pharmaceutically Important Morphinan Skeleton
作者:Peiyuan Yao、Zefei Xu、Shanshan Yu、Qiaqing Wu、Dunming Zhu
DOI:10.1002/adsc.201801326
日期:2019.2
8‐octahydroisoquinoline (1‐benzyl‐OHIQ) derivatives. 1‐Benzyl‐3,4,5,6,7,8‐hexahydroisoquinolines (1‐benzyl‐HHIQs), the precursors of 1‐benzyl‐OHIQs, constitute a type of bulky α, β‐unsaturated imines. Until now, the application of imine reductases (IREDs) to α, β‐unsaturated imines has only rarely been reported. In this study, through evaluation of 48 IREDs, both enantiomers of 1‐(4‐methoxybenzyl)‐1,2,3,4,5,6,7
吗啡骨架是许多药物(例如右美沙芬)中的重要子结构,可以由1-苄基1,2,3,4,5,6,7,8-八氢异喹啉(1-苄基OHIQ)衍生物构建。1-苄基-OHIQ的前体1-苄基-3,4,5,6,7,8-六氢异喹啉(1-苄基-HHIQs)构成了一种大体积的α,β-不饱和亚胺。到目前为止,很少有人报道将亚胺还原酶(IRED)应用于α,β-不饱和亚胺。在这项研究中,通过评估48个IRED,1-(4-甲氧基苄基)-1,2,3,4,5,6,7,8-八氢异喹啉(1-(4-甲氧基苄基)-OHIQ)的对映体均为获得高收率和优异的光学纯度。在这些酶中,最能耐受空间位阻的SREDARERANACUS Amylolyticus(IR40)能够将各种苯基取代的1-苄基-HHIQ转化为对映体过量极好的对应的1-苄基-OHIQ衍生物。这些结果提供了通过庞大的α,β-不饱和亚胺前体的对映选择性还原合成这些重要化合物的有效途径