Rhodium(III)-catalyzed oxidative annulation of N-arylbenzamidines with maleimides via dual C-H activation. 2023

G Siva Sankaram, and Tanmoy Sahoo, and B Sridhar, and B V Subba Reddy
Fluoro-Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, India.

An oxidative annulation of N-arylbenzimidamides with maleimides has been developed for the first time using a catalytic amount of the [Cp*RhCl2]2 complex for the synthesis of a diverse range of 1H-benzo[4,5]imidazo[2,1-a]pyrrolo[3,4-c]isoquinoline-1,3(2H)-dione derivatives. This method is versatile and atom-economical for producing polycyclic benzo[4,5]imidazo[2,1-a]pyrrolo[3,4-c] isoquinoline-1,3(2H)-dione scaffolds in a single step.

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