2-Chloro-5-nitrobenzoic acid → HCID 90450868, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 5-bromopyridine-2,3-diamine (15 g, 79.78 mmol, 1.00 equiv), 2-chloro-5-nitrobenzoic acid (17.7 g, 87.81 mmol, 1.10 equiv) in PPA (200 mL) was stirred overnight at 130° C. and then quenched by the addition of 300 mL of H2O/ice. The pH value of the mixture was adjusted to 8 with sodium carbonate and the solids were collected by filtration, washed with water and dried in an oven under reduced pressure to give 36 g (crude) of 6-bromo-2-(2-chloro-5-nitrophenyl)-1H-imidazo[4,5-b]pyridine I-2a as a brown solid.

Provenance & Evidence