Synthesis of Isoquinolines from Benzimidates and Alkynes via Cobalt(III)-Catalyzed C-H Functionalization/Cyclization.

C-H alkenylation/annulation of benzimidates with alkynes has been realized by using a Cp*Co(III) catalyst under air. A series of substituted isoquinolines were obtained with moderate to good yields under mild reaction conditions.