反应详情

From 3c, reaction time 18 h (yield: 29%); mp 98-100° C. (in Straub A. and al. U.S. Pat. No. 5,545,646, 1996: 96-99° C.); IR (KBr) 1699, 1542 cm−1; 1H NMR (400 MHz, CDCl3) δ 6.90 (t, 1H, J=7 Hz), 7.36 (t, 1H, J=7 Hz), 7.46 (t, 2H, J=7 Hz), 7.79 (d, 1H, J=7 Hz), 7.95 (s, 1H), 8.00 (d, 2H, J=7 Hz), 8.33 (d, 1H, J=7 Hz), 10.88 (s, 1H); 13C NMR (100 MHz, CDCl3) δ 108.5, 111.9, 123.8, 125.6, 126.4, 128.6, 128.9, 130.2, 133.2, 144.7, 147.3, 189.2; MS m/z 222 (M+, 45), 194 (100), 193 (84), 77 (30), 51 (31).

1. custom96-99° C.