反应详情

Under a nitrogen atmosphere 2,4-dichloro-5,6-dimethyl-3-nitropyridine (25 g, 113 mmol) was added to a solution of 4-(aminomethyl)tetrahydro-2H-pyran-4-ol (17 g, 130 mmol) in DMF (375 mL). Triethylamine (18 mL, 130 mmol) was added slowly and the reaction mixture was stirred at ambient temperature over the weekend. The reaction mixture was concentrated under reduced pressure and the residue was partitioned between ethyl acetate (700 mL) and saturated aqueous sodium bicarbonate (100 mL). The organic layer was washed with water (3×100 mL) and brine (50 mL), dried over magnesium sulfate, filtered, and then concentrated under reduced pressure to provide an orange solid. This material was triturated with ethyl acetate to provide 6.38 g of 4-{[(2-chloro-5,6-dimethyl-3-nitropyridin-4-yl)amino]methyl}tetrahydro-2H-pyran-4-ol as a yellow solid. An additional 4.36 g of product was recovered from the mother liquor.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. customthe residue was partitioned between ethyl acetate (700 mL) and saturated aqueous sodium bicarbonate (100 mL)
3. washThe organic layer was washed with water (3×100 mL) and brine (50 mL)
4. dry with materialdried over magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customto provide an orange solid
8. customThis material was triturated with ethyl acetate