反应详情

250 mg of 6-iodo-N-phenylimidazo[1,2-a]pyridine-2-carboxamide (Intermediate 2), 8 mL of N,N-dimethylformamide, 7.7 mg of palladium acetate, 197 mg of cuprous iodide and 71.3 mg of 1,2,4-triazole are placed in a microwave tube. The reaction mixture is heated for 2.5 hours in a microwave machine set at 200° C. The cooled reaction mixture is filtered, the insoluble matter is rinsed with N,N-dimethylformamide, dichloromethane and methanol and the combined filtrates are concentrated to dryness under reduced pressure. The residue is chromatographed on a silica cartridge, eluting with a 90/10 mixture of dichloromethane and methanol. The fractions containing the pure expected product are combined and evaporated to dryness under reduced pressure to give 40 mg of N-phenyl-6-(1H-1,2,4-triazol-3-yl)imidazo[1,2-a]pyridine-2-carboxamide in the form of a white solid.

1. temperatureThe reaction mixture is heated for 2.5 hours in a microwave machine
2. customset at 200° C
3. customThe cooled reaction mixture
4. filtrationis filtered
5. washthe insoluble matter is rinsed with N,N-dimethylformamide, dichloromethane and methanol
6. concentrationthe combined filtrates are concentrated to dryness under reduced pressure
7. customThe residue is chromatographed on a silica cartridge
8. washeluting with a 90/10 mixture of dichloromethane and methanol
9. additionThe fractions containing the pure expected product
10. customevaporated to dryness under reduced pressure