Enantioselective Friedel–Crafts Reaction of Heteroaromatic Compounds with Glyoxals Catalyzed by Chiral Oxazaborolidinium Ion Catalyst
作者:Shinyeong Han、Injoo Seo、Do Hyun Ryu
DOI:10.1021/acs.orglett.3c02284
日期:2023.9.22
A catalytic enantioselective Friedel–Crafts reaction of various heteroaromatic compounds with glyoxals has been developed. In the presence of a chiral oxazaborolidinium ion catalyst, the reaction provided chiral α-hydroxyketones in high yield (up to 96%) with excellent enantioselectivity (up to >99% ee). The synthetic utility of this method was illustrated by conversion of the products to various derivatives
各种杂芳族化合物与乙二醛的催化对映选择性弗里德尔-克来福特反应已被开发出来。在手性恶唑硼烷鎓离子催化剂存在下,该反应以高产率(高达 96%)提供手性 α-羟基酮,并具有优异的对映选择性(高达 >99% ee)。通过将产物转化为1,2-二醇和β-氨基醇等各种衍生物,说明了该方法的合成实用性。