反应详情

To a solution of 11.0 g of the compound obtained in Step 88-1 in EtOAc (100 ml) was added dropwise a solution of 4 mol/l hydrochloric acid in EtOAc (100 ml) over 20 minutes. The solution was stirred at room temperature for two hours and then the solvent was evaporated under reduced pressure. EtOAc was added, and the solution was stirred for 30 minutes. Thereafter, the precipitated solid was filtered and then dried to obtain 8.21 g of the title compound (colorless solid).

1. customthe solvent was evaporated under reduced pressure
2. additionEtOAc was added
3. stirringthe solution was stirred for 30 minutes
4. filtrationThereafter, the precipitated solid was filtered
5. customdried