6-iodo-N-phenylimidazo[1,2-a]pyridine-2-carboxamide → N-phenyl-6-vinylimidazo[1,2-a]pyridine-2-carboxamide

Participants

Reaction Conditions

Reaction Steps

A mixture of 0.73 g of 6-iodo-N-phenylimidazo[1,2-a]pyridine-2-carboxamide, 209 mg of tetrakis(triphenylphosphine)palladium(0), 587 μl of tributylvinyltin and 17 ml of DMF is heated at 130° C. for 10 minutes in a microwave device and then concentrated to dryness. The residue is taken up in 100 ml of water and extracted with two times 70 ml of ethyl acetate. The combined organic phases are washed with a saturated sodium chloride solution, dried over magnesium sulfate and evaporated to dryness under reduced pressure. The solid is triturated from ethyl acetate, filtered off, washed with ethyl acetate and then with isopropyl ether, and taken up in a mixture of methanol and dichloromethane. The insoluble material is filtered off and washed with methanol. The filtrate is concentrated to dryness under reduced pressure to give 0.29 g of N-phenyl-6-vinylimidazo[1,2-a]pyridine-2-carboxamide in the form of a white solid.

Provenance & Evidence