反应详情

To a solution of 2-((1-(benzhydryloxy)-5-((4-methoxybenzyl)oxy)-4-oxo-1,4-dihydropyridin-2-yl)methyl)isoindoline-1,3-dione (Intermediate 292, 1.66 g, 2.90 mmol) in chloroform (20 mL) and methanol (10 mL) at room temperature was added hydrazine monohydrate (0.284 mL, 5.80 mmol). The reaction mixture was stirred overnight at room temperature. Another 1 eq of hydrazine monohydrate was added. After 3 hours still see starting material. Added another 1 eq of hydrazine monohydrate. After 2 hours the reaction mixture was filtered to remove solids. The filtrate was concentrated. The residue was triturated with MeOH and ether and the solids filtered off. This was repeated twice more. The resulting solid was triturated once with chloroform and MeOH and the solids removed by filtration. The filtrate was concentrated to afford a yellow foam (1.01 g, 79%).

1. waitAfter 3 hours still see starting
2. filtrationAfter 2 hours the reaction mixture was filtered
3. customto remove solids
4. concentrationThe filtrate was concentrated
5. customThe residue was triturated with MeOH and ether
6. filtrationthe solids filtered off
7. customThe resulting solid was triturated once with chloroform and MeOH
8. customthe solids removed by filtration
9. concentrationThe filtrate was concentrated