反应详情

Heat at reflux for 25 minutes 3 mmol of the hydrobromide obtained in Step A and 4 g of sodium carbonate in 25 ml of ethanol. Evaporate, treat the residue twice with 10 ml of chloroform each time, and pass the resulting chloroform solutions over a column of alumina. Evaporate the eluate. The title compound is obtained in the form of an oil.

1. temperatureHeat
2. customEvaporate
3. additiontreat the residue twice with 10 ml of chloroform each time
4. customEvaporate the eluate