反应详情

In a 25 ml one-necked flask, 0.35 g (4.26 mmol) of 1-methylimidazole is dissolved in 10 ml of tetrahydrofuran and then 1.18 g (5.12 mmol) of 3,4-dimethoxybenzyl bromide are added. After heating under reflux overnight, 50 ml of diethyl ether are added. The precipitate formed is drained and then washed with diethyl ether. 1.25 g (94%) of 3-(3,4-dimethoxybenzyl)-1-methylimidazolium bromide are thus obtained in the form of a light beige powder, used as it is in the next step, whose characteristic is the following:

1. temperatureAfter heating
2. temperatureunder reflux overnight
3. customThe precipitate formed
4. washwashed with diethyl ether