Enantioselective Arylation of 3-Carboxamide Oxindoles with Quinone Monoimines and Synthesis of Chiral Spirooxindole-benzofuranones
作者:Hui Chen、Hui Liu、Si-Han Zhao、Shao-Bing Cheng、Xiao-Ying Xu、Wei-Cheng Yuan、Xiao-Mei Zhang
DOI:10.1055/s-0037-1611782
日期:2019.6
A highly enantioselective arylation of 3-carboxamide oxoindoles with quinone monoimines is described. Various 3-aryl-3-carboxamide oxindoles with an all-carbon quaternary center were obtained in moderate to good yields (up to 99%) with moderate to good enantioselectivities (up to 98%) in the presence of a bifunctional thiourea-tertiary amine catalyst. The absolute configuration of one product was determined
描述了 3-甲酰胺氧代吲哚与醌单亚胺的高度对映选择性芳基化。在双功能硫脲-叔胺存在下,以中等至良好的产率(高达 99%)和中等至良好的对映选择性(高达 98%)获得了各种具有全碳季铵中心的 3-芳基-3-甲酰胺羟吲哚催化剂。一种产品的绝对构型是通过 X 射线晶体结构分析确定的,其他产品的绝对构型可以通过类推来确定。此外,从 3-芳基-3-羧酰胺 oxindoles 合成了几种手性 spirooxindole-benzofuranones,产率适中,对映选择性适中。