Water → 1-(5-Tert-butylisoxazol-3-yl)-3-(5-(6,7-dimethoxyquinazolin-4-yloxy)-2-fluorophenyl)urea

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 1-(5-tert-butylisoxazol-3-yl)-3-(2-fluoro-5-hydroxyphenyl)urea (200 mg, 0.68 mmol) and 4-chloro-6,7-dimethoxyquinazoline (153 mg, 0.68 mmol) in DMF (4 mL) at rt, was added potassium carbonate (188 mg, 1.36 mmol). The reaction mixture was stirred at 35° C. for 15 h. The mixture was poured into water, and the resulting brown solid was filtrated, washed with water, and dried to afford the crude product. Purification via reverse-phase preparative HPLC afforded 1-(5-tert-butylisoxazol-3-yl)-3-(5-(6,7-dimethoxyquinazolin-4-yloxy)-2-fluorophenyl)urea (25 mg, 8%) as a solid. 1H NMR (400 MHz, DMSO-d6) δ 9.86 (brs, 1H), 8.85 (brs, 1H), 8.57 (s, 1H), 8.16 (m, 1H), 7.55 (s, 1H), 7.40-7.44 (m, 2H), 7.16 (m, 1H), 6.50 (s, 1H), 3.99 (s, 3H), 3.97 (s, 3H), 1.30 (s, 9H); LC-MS (ESI) m/z 482 (M+H)+.

Provenance & Evidence