反应详情

A mixture of 2-amino-3-(2-methoxycarbonylamino-6-methylbenzyloxy)pyridine (4.22 g) and 3-mesyloxy-5-hexyn-2-one (2.74 g) in ethanol (42 ml) was refluxed for 62 hours and then evaporated in vacuo. To the residue was added and aqueous solution of sodium bicarbonate and the insoluble material was collected by filtration. The crude product was purified by column chromatography on silica gel (150 g) with methylene chloride and then a mixture of methylene chloride and acetonitrile (10:1) as eluents to afford a solid, which was recrystallized from a mixture of ethyl acetate and cyclohexane to give 8-(2-methoxycarbonylamino-6-methylbenzyloxy)-2-methyl-3-(2-propynyl)imidazo[1,2-a]pyridine.

1. temperaturewas refluxed for 62 hours
2. customevaporated in vacuo
3. additionTo the residue was added
4. filtrationaqueous solution of sodium bicarbonate and the insoluble material was collected by filtration
5. customThe crude product was purified by column chromatography on silica gel (150 g) with methylene chloride
6. additiona mixture of methylene chloride and acetonitrile (10:1) as eluents
7. customto afford a solid, which
8. customwas recrystallized from a mixture of ethyl acetate and cyclohexane