反应详情

10% hydrochloric acid-methanol (0.2 mL) was added to a methanol solution (2 mL) of the compound (50 mg) obtained in Step 4 of Example 1. After the solvent was removed under reduced pressure, the residue obtained was crystallized from ether and collected by filtration to obtain the titled compound (48 mg) as crystals.

1. customAfter the solvent was removed under reduced pressure
2. customthe residue obtained
3. customwas crystallized from ether
4. filtrationcollected by filtration