Condensation reaction of 3,4‐dibenzoyl‐1‐methyl‐2,5‐diphenylpyrrole and ‐1‐phenylpyrazole with methylamine derivatives affording pyrrolo [3,4‐c]pyridine and 2H‐pyrazolo[3,4‐c]‐ and [4,3‐c]pyridines

The reaction of 3,4‐dibenzoyl‐1‐methyl‐2,5‐diphenylpyrrole (1) and ‐1‐phenylpyrazole (2) with methylamines (3a‐c) afforded pyrrolo[3,4‐c]pyridine (4), and isomeric 2H‐pyrazolo[3,4‐c]pyridines (5a‐c) and [4,3‐c]pyridines (6a‐c), respectively.