Rhodium-catalyzed direct coupling of biaryl pyridine derivatives with internal a Iky nes

摘要

Axially chiral biaryls were synthesized by an isoquinoline or 2-pyridine-directed Rh(m)-catalyzed dual C-H cleavage and coupling with internal alkynes in good to excellent yields. Oxidation of isoquinoline derivatives with m-CPBA furnished their corresponding N-oxides, which could be utilized as Lewis base catalysts in asymmetric reactions.