反应详情

A portion (1.0 g) of the compound obtained in Example 81 was suspended in ethanol (10 ml) and to the suspension was added a solution (2.5 ml) of 20% hydrochloric acid in ethanol. The mixture was stirred for 10 minutes at room temperature. The reaction mixture was concentrated under reduced pressure. The crystals obtained were washed with ether and ether/methanol to yield 0.87 g (76%) of the titled compound as pale brown crystals.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. customThe crystals obtained
3. washwere washed with ether and ether/methanol