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(sp³)–H pronucleophiles. Herein we report the Michael reaction between alkenes and aromatic as well as heteroaromatic compounds as aromatic C­(sp²)–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.