反应详情

A mixture of 7-benzyl-1,3-dichloro-5,6,7,8-tetrahydro-[2,7]-naphthyridine-4-carbonitrile (70 g, 0.22 mol) and triethylamine (70 mL) in methanol (1 L) was placed in a 2.5 L hydrogenation bottle and hydrogenated over 10% Pd/C (15 g) for 3 hr. The reaction mixture was filtered to remove catalyst. The catalyst on filter paper was washed with methanol (100 mL). The filtrate was concentrated under reduced pressure to give an oil. The oil was dissolved in dichloromethane (500 mL), washed with water (2×200 mL), brine (200 mL), dried over anhydrous magnesium sulfate (10 g), filtered and concentrated under reduced pressure to give an oil. The oil was placed under high vacuum line overnight to give the title compound (48.5 g, 88%). 1H NMR 60 MHz, (CDCl3), δ 8.5 (s, 1H), 8.3 (s, 1H), 7.3 (s, 5H), 3.7 (s, 2H), 3.6 (s, 2H), 2.8 (m, 4H).

1. filtrationThe reaction mixture was filtered
2. customto remove catalyst
3. filtrationThe catalyst on filter paper
4. washwas washed with methanol (100 mL)
5. concentrationThe filtrate was concentrated under reduced pressure
6. customto give an oil
7. washwashed with water (2×200 mL), brine (200 mL)
8. dry with materialdried over anhydrous magnesium sulfate (10 g)
9. filtrationfiltered
10. concentrationconcentrated under reduced pressure
11. customto give an oil
12. customwas placed under high vacuum line overnight