反应详情

温度

100 °C

To a solution of (R)-(1-(6-amino-5-nitropyridin-2-yl)piperidin-3-yl)(pyrrolidin-1-yl)methanone (250 mg, 0.711 mmol) in ethanol (15 mL) was added 6-cyclopropylpicolinaldehyde (0.137 g, 0.974 mmol), sodium dithionite (536 mg, 2.96 mmol) and water (2 mL). The reaction mixture was stirred for 16 h at 100° C. in a sealed tube. The mixture was cooled, and the solvent was removed under reduced pressure. Water was added to the residue and the mixture was extracted with ethyl acetate. The organics were dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude material was purified via preparative TLC eluting with 4% methanol in dichloromethane to afford the title compound (55 mg, 17%). MS (ES+APCI) (M+H) 417.2; LCMS retention time 1.944 (Method F). 1H NMR (300 MHz, CDCl3) δ 1.00-1.09 (m, 2H), 1.09-1.16 (m, 2H), 1.63-1.74 (m, 1H), 1.81-2.14 (m, 7H), 2.62-2.76 (m, 1H), 2.99 (dd, 1H), 3.08-3.21 (m, 1H), 3.44-3.55 (m, 3H), 3.58-3.70 (m, 1H), 4.35 (d, 1H), 4.48 (d, 1H), 6.71 (d, 1H), 7.19 (d, 1H), 7.66 (t, 1H), 7.87 (d, 1H), 8.04 (d, 1H), 10.18 (br s, 1H).

1. temperatureThe mixture was cooled
2. customthe solvent was removed under reduced pressure
3. additionWater was added to the residue
4. extractionthe mixture was extracted with ethyl acetate
5. dry with materialThe organics were dried over sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe crude material was purified via preparative TLC
9. washeluting with 4% methanol in dichloromethane