Enantioselective Synthesis of Thiomorpholines through Biocatalytic Reduction of 3,6-Dihydro-2<i>H</i>-1,4-thiazines Using Imine Reductases
作者:Jannis Nonnhoff、Hans-Georg Stammler、Harald Gröger
DOI:10.1021/acs.joc.2c00839
日期:2022.9.2
biocatalytic synthesis of chiral thiomorpholines using imine reductases (IREDs) is described. As substrates, four prochiral and one chiral 3,6-dihydro-2H-1,4-thiazines were synthesized in a modified Asinger reaction and subsequently reduced using imine reductases as a biocatalyst, NADPH as a cofactor, and a glucose dehydrogenase (GDH)-glucose cofactor regeneration system. As a result, chiral thiomorpholines
在这项工作中,描述了使用亚胺还原酶 (IRED) 的手性硫吗啉的对映选择性生物催化合成。作为底物,在改进的 Asinger 反应中合成了四种前手性和一种手性 3,6-二氢-2 H -1,4-噻嗪,随后使用亚胺还原酶作为生物催化剂、NADPH 作为辅助因子和葡萄糖脱氢酶 (GDH )-葡萄糖辅因子再生系统。结果,在温和的工艺条件下获得了在 3 位产生立体中心的手性硫代吗啉,具有高转化率和高达 99% 的优异对映选择性。此外,作为概念验证,实现了结合两个单独反应步骤的顺序一锅法。