反应详情

To a solution of the product obtained in Step B above (9.7 g, 31.9 mmol) in 300 ml of toluene there are added 150 mg of para-toluenesulphonic acid and the reaction mixture is heated at reflux, using a Dean-Stark installation, for 24 hours. The mixture is evaporated to dryness and dried using a vacuum pump.

1. temperaturethe reaction mixture is heated
2. temperatureat reflux
3. customThe mixture is evaporated to dryness
4. customdried