反应详情

Using Method L, 2-(3-acetamidophenyl)-6-chloropyrazine (4a) (60 mg, 0.24 mmol), 3-(1,3-oxazol-5-yl)aniline (56.1 mg, 0.35 mmol), Pd(0)2 dba3 (9 mg, 0.01 mmol), BINAP (50 mg, 0.04 mmol), sodium tert-butoxide (33 mg, 0.34 mmol) and toluene (5 mL) were reacted at 85° C. for 16 hours. The same workup as for Method L and a combination of column chromatography and preparative TLC afforded 23 mg of pure title compound. Yield: 25.8%. 1H NMR (250 MHz, DMSO-d6) δ 2.08 (s, 3H), 7.36 (d, 1H, 8.0 Hz), 7.48 (t, 2H, 8.3 Hz), 7.61 (s, 1 H), 7.65 (d, 1 H, 8.4 Hz), 7.82 (d, 2 H, 7.3 Hz), 8.23 (s, 1 H), 8.39 (bs, 2 H), 8.46 (s, 1 H), 8.47 (s, 1 H), 9.82 (s, 1 H), 10.09 (s, 1 H); 13C NMR (62.9 MHZ, DMSO-d6) δ 24.0, 113.4, 117.1, 117.3, 118.3, 120.3, 121.3, 121.8, 127.9, 129.3, 129.8, 130.3, 133.7, 137.0, 139.9, 141.4, 147.9, 150.8, 151.3, 151.7, 168.5; m/z 372.2 [(M+H)+, calcd for C21H17N5O2 371.1].

1. customwere reacted at 85° C. for 16 hours