反应详情

温度

100 °C

A mixture of ester 26 (630 mg, 1.97 mmol) and 5-amino-1-phenylsulfonylindole in phenol (3.0 g) was heated at 100° C. for 20 hours. Excess phenol was removed by distillation and the resulting brown oil was purified by silica gel chromatography eluting with 1:1 ethyl acetate:hexanes then ethyl acetate. Quinazoline 27 (430 mg, 43%) was obtained as an off-white waxy solid. 1H NMR (CDCl3; 400 MHz): δ: 8.61 (s, 1H), 7.92 (m, 3H), 7.82 (m, 4H), 7.51 (m, 2H), 7.43 (m, 3H), 6.74 (d, 1H), 6.62 (d, 1H), 6.45 (dt, 1H), 4.74 (dd, 2H), 2.09 (s, 3H).

1. customExcess phenol was removed by distillation
2. customthe resulting brown oil was purified by silica gel chromatography
3. washeluting with 1:1 ethyl acetate