反应详情

温度

80 °C

A CH2Cl2 solution (2 mL) of trans-4-{[(3-chloropyrazin-2-yl)-(2-phenyl-quinolin-7-yl)-methyl]-carbamoyl}-cyclohexanecarboxylic acid methyl ester (2.3 g, 4.5 mmol) in a round bottom flask equipped with a condenser was charged with POCl3 (15 mL) and stirred at 80° C. for 72 h. The reaction mixture was concentrated in vacuo to a foam, cooled to 0° C., and charged with cold 2M NH3 in isopropanol to basic pH. The mixture was concentrated in vacuo to solids and partitioned between EtOAc and water. The organic layer was washed with water (1×), brine (1×), dried over Na2SO4, filtered, and concentrated to a brown oil. The resulting residue was purified by silica gel chromatography (CH2Cl2 to 1%˜7N NH3 in MeOH/CH2Cl2) to provide the desired product as a yellow solid; 1H NMR (CDCl3, 400 MHz) δ 1.62-1.73 (m, 2H), 1.92-2.02 (m, 2H), 2.15-2.27 (m, 4H), 2.44-2.60 (m, 1H), 2.99-3.08 (m, 1H), 3.72 (s, 3H), 7.39 (d, 1H, J=5.2 Hz), 7.45-7.50 (m, 1H), 7.51-7.57 (m, 2H), 7.61 (d, 1H, J=5.2 Hz), 7.85-7.93 (m, 3H), 8.19 (d, 2H, J=7.6 Hz), 8.27 (d, 1H, J=8.4 Hz), 8.50 (s, 1H); MS (ES+): m/z 496.9 [MH+]; HPLC: tR=3.6 min (Micromass Platform II, nonpolar—5 min).

1. concentrationThe reaction mixture was concentrated in vacuo to a foam
2. temperaturecooled to 0° C.
3. additioncharged with cold 2M NH3 in isopropanol to basic pH
4. concentrationThe mixture was concentrated in vacuo to solids
5. custompartitioned between EtOAc and water
6. washThe organic layer was washed with water (1×), brine (1×)
7. dry with materialdried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated to a brown oil
10. customThe resulting residue was purified by silica gel chromatography (CH2Cl2 to 1%˜7N NH3 in MeOH/CH2Cl2)