反应详情

The compound (1.38 g) obtained in Example 122-2 was dissolved in methanol (10 ml), added with a 4 mol/l hydrogen chloride/dioxane solution (15 ml), and stirred at room temperature for 30 minutes. The reaction solution was concentrated under reduced pressure and neutralized with an anion-exchange resin (Amberlite IRA-410). The solvent was concentrated under reduced pressure and the residue was dried under vacuum, thereby obtaining the subject compound (0.79 g) as a yellow solid.

1. concentrationThe reaction solution was concentrated under reduced pressure
2. concentrationThe solvent was concentrated under reduced pressure
3. customthe residue was dried under vacuum