bifunctional quaternary phosphonium bromides possessing an amide moiety were designed for the highly enantioselective sulfenylation and chlorination of β-ketoesters under base-free phase-transfer conditions. The tuning of an amide moiety of the catalyst was crucial to achieve high reactivity and enantioselectivity.
设计了具有酰胺部分的新型双官能季
铵化
溴化物,用于在无碱相转移条件下对β-
酮酸酯进行高度对映选择性的亚磺酰化和
氯化反应。催化剂的酰胺部分的调节对于实现高反应性和对映选择性是至关重要的。