反应详情

4-Amino-2-chloro-5-cyclobutyloxy-6,7-dimethoxyquinazoline (184 mg, 0.00059 mol) was added to a solution of 1-(4-morpholinecarbonyl)-1,4-diazepane hydrochloride (163 mg, 0.00065 mol) and triethylamine (184 μl, 0.0013 mol) in n-butanol (6 ml) and the reaction stirred at reflux for 2 hours. On cooling, the reaction was concentrated under reduced pressure and the residue partitioned between ethyl acetate (20 ml) and water (20 ml). The aqueous layer was further extracted with ethyl acetate (2×20 ml), the combined organic extracts dried (MgSO4), filtered and evaporated under reduced pressure. The crude product was purified on silica gel eluting with a solvent gradient of methanol:dichloromethane (0:100 to 7:93 v/v) to give the title compound as a white foam (1110 mg, 38%). MS m/z=487 (MH)+. 1H-NMR (CDCl3): δ=1.53 (1H, m), 1.76 (1H, m), 2.04 (2H, m), 2.25 (2H, m), 2.38 (2H, m), 3.20 (4H, t), 3,36 (2H, t), 3.55 (2H, t), 3.66 (4H, t), 3.80 (3H, s), 3.85 (3H, m), 3.94 (6H, m), 4.86 (1H, m), 6.62 (1H, s). Found: C, 58.09; H, 6.96; N, 16.69; C24H34N6O5 0.15CH2Cl2, requires C, 58.09; H, 6.92; N, 16.83%

1. temperatureat reflux for 2 hours
2. temperatureOn cooling
3. concentrationthe reaction was concentrated under reduced pressure
4. customthe residue partitioned between ethyl acetate (20 ml) and water (20 ml)
5. extractionThe aqueous layer was further extracted with ethyl acetate (2×20 ml)
6. dry with materialthe combined organic extracts dried (MgSO4)
7. filtrationfiltered
8. customevaporated under reduced pressure
9. customThe crude product was purified on silica gel eluting with a solvent gradient of methanol:dichloromethane (0:100 to 7:93 v/v)