反应详情

40 ml of water are added to a solution of 70 mmol of the compound of Step A in 250 ml of dioxane. After 20 hours' reflux and then return to room temperature, a precipitate forms. After filtration and rinsing with water until neutral, the precipitate is dried over P2O5 under reduced pressure. 18.6 g of the expected product are thus isolated.

1. temperatureAfter 20 hours' reflux
2. customreturn to room temperature
3. filtrationAfter filtration
4. washrinsing with water until neutral, the precipitate
5. dry with materialis dried over P2O5 under reduced pressure