反应详情

To a stirred suspension of 5-iodo-N-(3-methoxy-4-((4-methoxybenzyl)oxy)benzyl)-3-nitropyridin-2-amine (6.72 g, 13.25 mmol) in tetrahydrofuran (75 mL), methanol (25 mL), and water (25 ml) was added ammonium chloride (5.68 g, 106.0 mmol) and iron(II) sulfate heptahydrate (11.05 g, 39.76 mmol). The yellow mixture was treated with zinc (2.60 g, 39.76 mmol), and the resulting dark mixture was heated to reflux. After 3 h, the reaction mixture was allowed to cool to room temperature and was filtered through Celite with the aid of methanol. The filtrate was concentrated, and the residue was dissolved in chloroform. The solution was washed with water, filtered through Celite, dried over magnesium sulfate, filtered, and concentrated to provide 6.67 g (>100%) of 5-iodo-N2-(3-methoxy-4-((4-methoxybenzyl)oxy)benzyl)pyridine-2,3-diamine as a brown solid.

1. temperaturethe resulting dark mixture was heated to reflux
2. filtrationwas filtered through Celite with the aid of methanol
3. concentrationThe filtrate was concentrated
4. dissolutionthe residue was dissolved in chloroform
5. washThe solution was washed with water
6. filtrationfiltered through Celite
7. dry with materialdried over magnesium sulfate
8. filtrationfiltered
9. concentrationconcentrated