Design of Planar Chiral Phosphoric Acids with a [2.2]Paracyclophanyl Backbone as Organocatalysts for the Highly Enantioselective Aza-Friedel–Crafts Reaction
作者:En Xie、Shaoying Huang、Xufeng Lin
DOI:10.1021/acs.orglett.9b01127
日期:2019.5.17
A new type of robust planarchiral phosphoric acid bearing a [2.2]paracyclophane scaffold was synthesized and shown to be an optimal catalyst in asymmetric aza-Friedel–Crafts reactions for the first synthesis of enantioenriched styryl indolylmethanamine derivatives in good yields with excellent enantioselectivities (93–>99% ee) under 0.5–1 mol % catalyst loading.