Acetonitrile → N-phenyl-6-(pyrid-3-yl)imidazo[1,2-a]pyridine-2-carboxamide

Participants

Reaction Steps

150 mg of 6-bromo-N-phenylimidazo[1,2-a]pyridine-2-carboxamide (Intermediate 1), 0.237 g of pyridine-3-boronic acid, 45 mg of tetrakis(triphenylphosphine)palladium, 2 mL of aqueous 2M sodium carbonate solution, 4 mL of acetonitrile and 4 mL of toluene are placed in a microwave tube. The mixture is heated for 20 minutes in a microwave machine set at 150° C., and then cooled and filtered, the insoluble matter being washed with a mixture of methanol and dichloromethane. The combined filtrates are concentrated to dryness under reduced pressure. The residue is concreted with aqueous methanol to give 73 mg of N-phenyl-6-(pyrid-3-yl)imidazo[1,2-a]pyridine-2-carboxamide in the form of an off-white solid.

Provenance & Evidence