A Ru(ii)-catalyzed C–H activation and annulation cascade for the construction of highly coumarin-fused benzo[a]quinolizin-4-ones and pyridin-2-ones

A reaction involving a Ru( ii )-catalyzed C–H activation and annulation cascade was successfully established for constructing coumarin-fused benzo[ a ]quinolizin-4-ones and pyridin-2-ones.