反应详情

In 50 ml of ethyl acetate saturated with hydrogen chloride was dissolved 2.18 g of Compound 137 obtained by Example 137, and the solution was stirred for 1 hour. Thereafter, the solvent was evaporated under reduced pressure, and the residue was recrystallized from methanol to afford 0.31 g of the desired compound (Compound 138).

1. customThereafter, the solvent was evaporated under reduced pressure
2. customthe residue was recrystallized from methanol