反应详情

To a stirred solution of 3-(6,7-dimethoxyquinazolin-4-yloxy)aniline (89 mg, 0.3 mmol) described in Example 113A in anhydrous THF (1.5 mL), was added 4-chlorophenyl 3-(1,1,1-trifluoro-2-methylpropan-2-yl)isoxazol-5-ylcarbamate from the previous step (104 mg, 0.3 mmol) and 4-(dimethylamino)pyridine (18 mg, 0.15 mmol). The mixture was stirred at rt for 6 h. Concentration in vacuo followed by purification by silica gel chromatography (dichloromethane/ethyl acetate 1:1) afforded 1-(3-(6,7-dimethoxyquinazolin-4-yloxy)phenyl)-3-(3-(1,1,1-trifluoro-2-methylpropan-2-yl)isoxazol-5-yl)urea (79.9 mg, 51%) as a colorless solid. 1H NMR (300 MHz, DMSO-d6) δ 10.44 (s, 1H), 9.11 (s, 1H), 8.56 (s, 1H), 7.56-7.58 (m, 2H), 7.40-7.45 (m, 2H), 7.29-7.32 (m, 2H), 6.99-7.02 (m, 2H), 6.18 (s, 1H), 4.00 (s, 6H), 1.24 (s, 6H); LC-MS (ESI) m/z 518 (M+H)+.

1. concentrationConcentration in vacuo
2. customfollowed by purification by silica gel chromatography (dichloromethane/ethyl acetate 1:1)