反应详情

温度

60 °C

To a solution of 1,2-Dihydroxy-3-(5-morpholin-4-ylmethyl-pyridin-2-yl)-1H-indole-5-carbonitrile (1.0 g, 94% pure, 10.73 mmol) in acetic acid (60 ml) at 60° C. was added iron powder (1.8 g, 32.19 mmol) and the resulting dark green solution stirred at 60° C. for 3 hrs. The suspension was removed from the oil bath and cooled to room temperature. Celite® (10 g) was added and the mixture concentrated to dryness. The mixture was then purified by silica column chromatography eluting with dichloromethane/methanol (1% ammonium hydroxide) 5:1 to give an orange solid; which was reslurried with isopropanol, filtered and then washed with isopropanol. After drying at 50° C. under vacuum gave, 2.89 g, 81% yield of 2-Hydroxy-3-[5-(morpholin-4-ylmethyl)pyridin-2-yl]1H-indole-5-carbonitrile as a yellow powder. 1H NMR (400 MHz; CDCl3,): δ 14.76 (br s, 1H), 10.9 (s, 1H), 8.07 (s, 1H), 7.88 (s, 1H), 7.77 (m, 2H), 7.26 (dd, J=1.08, 7.97 Hz, 1H), 7.00 (d, J=8.0 Hz, 1H), 3.55 (m, 4H), 3.35 (s, 2H), 2.35 (br s, 4H); 13C NMR: (100 MHz, CDCl3): δ 169.2, 148.9, 142.5, 1367.5, 136.4, 125.7, 124.5, 122.8, 121.8, 121.5, 119.3, 118.8, 101.8, 84.9, 66.6, 58.8, 53.3 ppm; MS (ESI) m/z [M+1]+ 335.

1. customThe suspension was removed from the oil bath
2. temperaturecooled to room temperature
3. additionCelite® (10 g) was added
4. concentrationthe mixture concentrated to dryness
5. customThe mixture was then purified by silica column chromatography
6. washeluting with dichloromethane/methanol (1% ammonium hydroxide) 5:1
7. customto give an orange solid
8. filtrationfiltered
9. washwashed with isopropanol
10. customAfter drying at 50° C. under vacuum
11. customgave