反应详情

A mixture of 4-chlorobenzofurano[3,2-d]pyrimidine (116mg, 0.57 mmol) and 3-bromoaniline (0.07 mL, 0.6 mmol) is heated at 135° C. under N2 in stirred 2-ethoxyethanol for 3 h. The mixture precipitates upon cooling, and the solid is collected and recrystallized from EtOH to give 4-(3-bromoanilino)benzofurano[3,2-d]pyrimidine (15.7 mg, 8%). 1H NMR (DMSO) δ10.35 (1H, s), 8.73 (1H, s), 8.34 (1H, t, J=1.9 Hz), 8.17 (1H, ddd, J=7.2, 1.2, 0.7 Hz), 7.93 (1H, ddd, J=8.2, 2.2, 1.0 Hz), 7.88 (1H, d, J=8.4 Hz), 7.77 (1H, dt, Jd =1.4 Hz, Jt =7.2 Hz), 7.56 (1H, dt, Jd =0.8 Hz, Jt =8.0 Hz), 7.34 (1H, t, J=8.0 Hz), 7.27 (1H, ddd, J=8.0, 2.0, 1.0 Hz).

1. customThe mixture precipitates
2. temperatureupon cooling
3. customthe solid is collected
4. customrecrystallized from EtOH