B(C6F5)3-Catalyzed Michael Reactions: Aromatic C-H as Nucleophiles

The Michael reaction is a widely used reaction for the C-C coupling of electron-poor olefins and C(sp(3))-H pronucleophiles. Herein we report the Michael reaction between alkenes and aromatic as well as heteroaromatic compounds as aromatic C(sp(2))-H nucleophiles under mild conditions. The reaction is catalyzed by readily available Lewis acidic B(C6F5)(3) and proceeds with high regioselectivity for a wide substrate scope.