反应详情

A mixture of example 289B (5.0 g, 15.8 mmol) and hydrochloric acid (22%, 150 mL) was heated to reflux for 24 hours, cooled to room temperature, filtered. Filtrate was basified with 50% sodium hydroxide. Pale green solid was collected by filtration, washed with large quantity of water and dried under vacuum. MS (ESI(+)Q1MS m/z 291 (M+H)+.

1. temperatureto reflux for 24 hours
2. filtrationfiltered
3. filtrationPale green solid was collected by filtration
4. washwashed with large quantity of water
5. customdried under vacuum