Rhodium(III)-Catalyzed\nC–H Activation/[5 +\n2] Cascade Annulation of Aroyl Hydrazides with Iodonium Ylides for\nthe Synthesis of Seven-Membered Dibenzodiazepinediones

A novel Rh(III)-catalyzed C–H activation/[5 +\n2] cascade\nannulation of aroyl hydrazides with iodonium ylides is accomplished,\nin which diverse seven-membered dibenzodiazepinediones were afforded\nin moderate to excellent yields. This annulation reaction features\nan ideal functional group tolerance and a wide substrate scope. Large-scale\nand derivatization reactions were conducted to demonstrate the potential\nutility of this transformation.