Redox-neutral rhodium(III)-catalyzed [4 + 1] annulation of N-aryl phthalazinediones with alkynes.

An efficient Rh(III)-catalyzed redox-neutral [4 + 1] annulation between N-aryl phthalazinediones and α,α-difluoromethylene alkynes has been developed for the synthesis of functionalized indazolo[1,2-b]phthalazine-6,11-diones. Notably, α,α-difluoromet…

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