反应详情

A solution of 5-[2-(p-hydroxyphenyl)ethen-1-yl]imidazo[1,5-a]pyridine (2.36 g) in 10 ml of dimethylformamide is added to a slurry of 0.5 g of sodium hydride in 30 ml of dry dimethylformamide at 0° under nitrogen. After warming to room temperature ethyl bromoacetate (1.67 g) is added and the reaction is heated to 60° for 5 hours. Water (200 ml) is added and the solution is extracted with ethyl acetate. The combined organic phases are washed with water, dried over sodium sulfate and evaporated to yield 5-[2-(p-[ethoxycarbonylmethoxy]phenyl)ethen-1-yl]imidazo[1,5-a]pyridine.

1. additionis added
2. temperaturethe reaction is heated to 60° for 5 hours
3. extractionthe solution is extracted with ethyl acetate
4. washThe combined organic phases are washed with water
5. dry with materialdried over sodium sulfate
6. customevaporated