反应详情

To 1-chloro-3-phenylisoquinoline (J. Het. Chem., 20, 1983, 121-128) (0.33 g, 1.37 mmol) in dry DMF (5 mL) was added 3-amino-5-methylpyrazole (0.27 g, 2.74 mmol) and potassium carbonate (0.57 g, 4.13 mmol)and the mixture was heated under reflux for 6 hours. The mixture was cooled and the bulk of DMF was evaporated. The residue was extracted twice with ethyl acetate and the combined organic layers were washed with brine, dried (MgSO4), filtered and concentrated. The crude was purified by flash chromatography (SiO2, gradient DCM-MeOH) to give the title compound as a colourless oil; 1H NMR (MeOD) δ2.23 (3H, s), 5.61 (1H, s), 7.41 (1H, m), 7.52(2H, m), 7.62(1H, m), 7.81(1H, m), 8.07(1H, d), 8.19(2H, m), 8.29(1H, s), 8.54 (1H, d); MS 301.2 (M+H)+

1. temperaturethe mixture was heated
2. temperatureunder reflux for 6 hours
3. temperatureThe mixture was cooled
4. customthe bulk of DMF was evaporated
5. extractionThe residue was extracted twice with ethyl acetate
6. washthe combined organic layers were washed with brine
7. dry with materialdried (MgSO4)
8. filtrationfiltered
9. concentrationconcentrated
10. customThe crude was purified by flash chromatography (SiO2, gradient DCM-MeOH)