Regiodivergent C−H Annulation of Imines with Unsymmetrical Alkynes Using Transient Directing Alcohols via Rh(III) Catalysis.

Regiodivergent [3+2] and [4+2] C−H annulation of imines and imidate esters with unsymmetrical alkynes has been achieved under Rh(III) catalysis. Further transformation of the aldehyde and TMS functionality on the indene products is also demonstrated. The current work highlights the alcohols‐directed multiple C−H annulation of imines and imidate esters, leading to diverse fused heterocycles. [ABSTRACT FROM AUTHOR]