Transition-Metal-Catalyzed Aldehydic C−H Activation by Azodicarboxylates

Rhodium acetate-catalyzed hydroacylation between aldehydes and an activated form of N=N bond was achieved under mild conditions to provide efficient access to a variety of hydrazino imides. Good selectivity for the aldehydic C-H activation relative to the ene-type reaction was observed with aldehydes having unsaturation both at terminal and internal positions.