反应详情

Example 14(c) was prepared from 6-methoxy-2-ethylbenzo[b]furan-3-carboxylic acid methylamide 14b (401 mg, 1.72 mmole) by treatment with BBr3 in a manner as previously described for example 1d to give 318 mg (84%) of an off-white solid. 1H NMR (DMSO-d6) δ9.53 (1H, s), 7.79 (1H, d, J=4.6 Hz), 7.45 (1H, d, J=8.6 Hz), 6.88 (1H, d, J=2.0 Hz), 6.74 (1H, dd, J=2.0, 8.6 Hz), 3.03 (2H, q, J=7.3 Hz), 2.77 (3H, d, J=4.6 Hz), 1.24 (3H, t, J=7.3 Hz). Anal. Calcd for C12H13NO3: C, 65.74; H, 5.98; N, 6.39. Found: C, 65.61; H, 6.06; N, 6.32.