反应详情

6-(3-Bromo-5-trifluoromethoxy-phenyl)-4,4-dimethyl-1,4-dihydrobenzo [d][1,3]-oxazin-2-one was prepared, using (4,4-dimethyl-1,4-dihydro-2-oxo-2H-3,1-benzoxazin-6-yl)boronic acid and 1, 3-dibromo-5-trifluoromethoxybenzene according to the procedure of Example 5, as a white solid: mp 214–216° C.; 1H-NMR (DMSO-d6) δ 10.4 (s, 1H), 7.99 (s, 1H), 7.73 (s, 1H), 7.68–7.62 (m, 3H), 6.97 (d, 1H, J=8.0 Hz), 1.68 (s, 6H); MS (ESI) m/z 414 ([M−H]−, 100%); Anal. Calc. For C17H13BrF3NO3: C, 49.06, H, 3.15, N, 3.37. Found: C, 49.16, H, 3.05, N, 3.30.