反应详情

0.17 mol of the compound obtained in Stage A of Example 3, dissolved in 200 ml of phosphorus oxychloride, is brought to 85° C. for one hour 30 minutes. The phosphorus oxychloride is then removed by evaporation under vacuum. 100 ml of water are added and the pH is adjusted to 7 using sodium bicarbonate to crystallize the expected compound. The latter is filtered off.

1. customThe phosphorus oxychloride is then removed by evaporation under vacuum
2. addition100 ml of water are added
3. customto crystallize the expected compound
4. filtrationThe latter is filtered off