反应详情

0.76 g of the compound obtained in Example 86 dissolved in 22 ml of methylene chloride and 22 ml of trifluoroacetic acid was stirred at room temperature for 4 hours. The residue obtained from distillation of the reacted solution under a reduced pressure was stirred in 5 ml of methylene chloride while adding 50 ml of saturated aqueous sodium bicarbonate slowly, and filtered under a reduced pressure to obtain the title compound as solid (0.62 g, 99%).

1. customThe residue obtained from distillation of the reacted solution under a reduced pressure
2. filtrationfiltered under a reduced pressure