HCID 13922465, compound → HCID 20228696, compound

Participants

Reaction Steps

A mixture of 3,7-dimethyl-2-(4-acetoamido-3-nitrophenyl)imidazo[1,2-a]pyridine (2 g) in methanol (200 ml) was hydrogenated over 10% palladium on carbon (wet, 400 mg) under an atmospheric pressure of hydrogen at ambient temperature for 2 hours. The catalyst was filtered off and the filtrate was concentrated to 20 ml of volume and allowed to stand overnight. Th.e precipitates were filtered off and the filtrate was concentrated under reduced pressure. The residue was subjected to column chromatography on aluminum oxide (50 g) eluting with chloroform. The fractions containing the object compound were combined and allowed to stand overnight. The resultant yellow needles were collected by filtration and dried under reduced pressure to afford 5-(3,7-dimethylimidazo[1,2-a]pyridin-2-yl)-2-methylbenzimidazole (0.51 g). mp. 250°-253° C. (dec.).

Provenance & Evidence