Cesium carbonate → 1-(5-Tert-butylisoxazol-3-yl)-3-{3-[7-methoxy-6-(2-methoxyethoxy)quinazolin-4-yloxy]phenyl}urea

Participants

Reaction Conditions

Reaction Steps

According to the procedure described in Example 50, a mixture of 1-(5-tert-butylisoxazol-3-yl)-3-(3-hydroxyphenyl)urea (0.201 g, 0.73 mmol) from Example 1A, 4-chloro-7-methoxy-6-(2-methoxyethoxy)quinazoline (0.195 g, 0.73 mmol) from the previous step, and Cs2CO3 (0.261 g, 0.8 mmol) in isopropanol (10 mL) was heated at 70° C. for 7 hours, to afford 1-(5-tert-butylisoxazol-3-yl)-3-{3-[7-methoxy-6-(2-methoxyethoxy)quinazolin-4-yloxy]phenyl}urea as a solid. 1H NMR (300 MHz, CDCl3) δ 9.13 (br and s, 2H), 8.61 (s, 1H), 7.62 (s, 1H), 7.55 (s, 1H), 7.31 (m, 3H), 6.97 (dd, 1H), 6.08 (s, 1H), 4.34 (t, 2H), 4.11 (s, 3H), 3.89 (t, 2H), 3.49 (s, 3H), 1.30 (s, 9H); LC-MS (ESI) m/z 508 (M+H)+.

Provenance & Evidence