反应详情

A solution of 22b (200 mg; 0.76 mmol) in HCl-saturated isopropanol (15 ml) was stirred under reflux for 2.5 h. The solution was concentrated and the yellowish-white residue was triturated with a little ethanol, filtered off and dried.

1. temperatureunder reflux for 2.5 h
2. concentrationThe solution was concentrated
3. customthe yellowish-white residue was triturated with a little ethanol
4. filtrationfiltered off
5. customdried