反应详情

温度

125 °C

To a suspension of (3-Chloro-phenyl)-[4-(2-hydrazino-pyridin-4-yl)-pyrimidin-2-yl]-amine (5 g) in acetic acid (80 mL) was added 2.8 g of Mucochloric acid. The mixture was heated at 125° C. for 4 h. The solvent was concentrated and the crude was poured into water (500 mL). The suspension was neutralised by addition of solid potassium carbonate until pH 7. The aqueous phase was extracted with ethyl acetate (3×200 mL). The organic phases were combined, dried over MgSO4, and concentrated. Flash silica chromatography, eluting with ethyl acetate-tetrahydrofuran (1-0 to 1-1), afforded the title compound as a solid (3.11 g, 44%). Mp 238–240° C., 1H NMR (DMSO-d6) 10.3 (1H, s, NH), 8.84 (1H, d, 5 Hz), 8.76 (1H, d, 5 Hz), 8.42 (1H, s), 8.38 (1H, s), 8.28 (1H, 2 Hz, 5 Hz), 8.04 (1H, t, 2 Hz), 7.74 (1H, dd), 7.62 (1H, d, 5 Hz), 7.32 (1H, t, 8 Hz), 7.02 (1H, dd, 2 Hz, 8 Hz). 13CNMR DMSO-d6) 160.3, 160.2, 159.9, 155.5, 153.5, 150.2, 146.6, 141.7, 136.7, 136.6, 134.0, 132.9, 130.1, 121.9, 121.1, 118.7, 118.2, 117.3, 109.3.

1. concentrationThe solvent was concentrated
2. additionthe crude was poured into water (500 mL)
3. additionThe suspension was neutralised by addition of solid potassium carbonate until pH 7
4. extractionThe aqueous phase was extracted with ethyl acetate (3×200 mL)
5. dry with materialdried over MgSO4
6. concentrationconcentrated
7. washFlash silica chromatography, eluting with ethyl acetate-tetrahydrofuran (1-0 to 1-1)