反应详情

To a solution of 2-((4,5-bis(4-methoxybenzyloxy)pyridin-2-yl)methyl)isoindoline-1,3-dione (Intermediate 64, 1.1 g, 2.15 mmol) in chloroform (20 mL) and methanol (10 mL) at room temperature was added hydrazine hydrate (0.328 mL, 4.31 mmol). The reaction was stirred overnight at room temperature. Another 1 eq of hydrazine hydrate was added. After 4 hours the reaction mixture was filtered to remove the solids. The filtrate was concentrated to afford an orange oil. The oil was dissolved in methanol and ether was added to crash out more solids. This was repeated until no 2,3-dihydrophthalazine-1,4-dione by product remained. The title compound was obtained as an orange foam (0.82 g, 100%).

1. filtrationAfter 4 hours the reaction mixture was filtered
2. customto remove the solids
3. concentrationThe filtrate was concentrated
4. customto afford an orange oil