Enantioselective Biocatalytic Reduction of 2<i>H</i>-1,4-Benzoxazines Using Imine Reductases
作者:Nadine Zumbrägel、Paul Machui、Jannis Nonnhoff、Harald Gröger
DOI:10.1021/acs.joc.8b02867
日期:2019.2.1
A biocatalytic reduction of 2H-1,4-benzoxazines using imine reductases is reported. This process enables a smooth and enantioselective synthesis of the resulting cyclic amines under mild conditions in aqueous media by means of a catalytic amount of the cofactor NADPH as hydride source as well as glucose as the reducing agent used in stoichiometric amounts for in situ cofactor recycling. Several substrates
据报道,使用亚胺还原酶可生物催化还原2 H -1,4-苯并恶嗪。通过催化量的辅因子NADPH作为氢化物源以及葡萄糖作为化学计量的还原剂用于原位辅因子再循环,该方法能够在温和条件下在水性介质中平稳且对映选择性地合成所得环胺。研究了几种底物,并获得了具有高达99%ee的3,4-二氢-2 H -1,4-苯并恶嗪。此外,已经证明,以亚胺还原酶为催化剂的这种还原过程的效率在实验室负载较高的实验室条件下,以10 g L –1的底物负荷运行时,可用于一种2 H -1,4-苯并恶嗪。 在量身定制的全细胞催化剂存在下。