ChemInform Abstract: Na₂S₂O₄: A Versatile Reagent for the One‐Pot Synthesis of 2‐Aryl‐1H‐imidazo[4,5‐c]pyridines from 4‐Amino‐3‐nitropyridine and Aldehydes via Reductive Cyclization.

Abstract

Cyclization. -Two routes for the preparation of the title compounds (III) start from (I) or (VI). N-Benzylation of (III) under phase-transfer conditions occurs on the imidazole rather than the pyridine ring. -(DUBEY, P. K.; CHOWDARY, K. S.; RAMESH*, B.; REDDY, P. V. V. P.; Synth. Commun. 40 (2010) 5, 697-708,