反应详情

To a solution of 3-[3-(dimethylamino)prop-2-enoyl]-1-(4-morpholin-4-ylphenyl)pyridazin-4(1H)-one (300 mg, 0.85 mmol) in 20 mL of methanol, 2,2-dimethylpropylhydrazine (346 mg, 139 mmol) was added, the resulting mixture was refluxed for 4 hours, and then concentrated. The residue was dissolved in dichloromethane (20 mL), washed with 1 M acetic acid aqueous solution and brine, dried over anhydrous Na2SO4, and concentrated under reduced pressure. The residue was purified by prep-HPLC to give the title compound (75 mg, 22% yield) as a yellow solid: 1H NMR (400 MHz, CDCl3): δ 0.83 (9H, s), 3.22-3.25 (4H, m), 3.88-3.90 (4H, m), 4.41 (2H, s), 6.70 (1H, d, J=7.6 Hz), 7.00 (2H, d, J=9.2 Hz), 7.08 (1H, d, J=2.0 Hz), 7.45 (2H, d, J=9.2 Hz), 7.58 (1H, d, J=2.0 Hz), 8.14 (1H, d, J=8.0 Hz); LCMS (mobile phase: from 70% water and 30% CH3CN to 5% water and 95% CH3CN in 6 min, finally under these conditions for 0.5 min.) purity is >95%, Rt=2.656 min; MS Calcd.: 393. MS Found: 394 (M++H).

1. temperaturethe resulting mixture was refluxed for 4 hours
2. concentrationconcentrated
3. dissolutionThe residue was dissolved in dichloromethane (20 mL)
4. washwashed with 1 M acetic acid aqueous solution and brine
5. dry with materialdried over anhydrous Na2SO4
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by prep-HPLC