Cesium carbonate → 1-(5-Tert-butylisoxazol-3-yl)-3-[3-(7,8-dihydro-[1,4]dioxino[2,3-g]quinazolin-4-yloxy)phenyl]urea

Participants

Reaction Conditions

Reaction Steps

According to the procedure described in Example 13B Step 1, a mixture of 1-(5-tert-butylisoxazol-3-yl)-3-(3-hydroxyphenyl)urea from Example 1A (0.138 g, 0.5 mmol), 4-chloro-7,8-dihydro-[1,4]dioxino[2,3-g]quinazoline from the previous step (0.111 g, 0.5 mmol), and Cs2CO3 (0.326 g, 1 mmol) in isopropanol (7 mL) was heated at 70° C. for 13 hours, to afford 1-(5-tert-butylisoxazol-3-yl)-3-[3-(7,8-dihydro-[1,4]dioxino[2,3-g]quinazolin-4-yloxy]phenyl)urea as a solid. 1H NMR (300 MHz, CDCl3) δ 9.3 (br, 1H), 9.10 (s, 1H), 8.59 (s, 1H), 7.72 (s, 1H), 7.60 (m, 1H), 7.42 (s, 1H), 7.31 (m, 2H), 6.95 (d, 1H), 6.02 (s, 1H), 4.41 (m 4H), 1.30 (s, 9H).

Provenance & Evidence