3,5-Dibromotoluene → 6-(3-Bromo-5-methyl-phenyl)-4,4-dimethyl-1,4-dihydrobenzo-[d][1,3]oxazin-2-one

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6-(3-Bromo-5-methyl-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 3,5-dibromotoluene according to the procedure of Example 5, as a white solid: mp 231-233° C.; 1H-NMR (DMSO-d6) δ 10.4 (s, 1H), 7.66 (s, 1H), 7.58-7.56 (m, 2H), 7.50 (s, 1H), 7.37 (s, 1H), 6.95 (d, 1H, J=8.67 Hz), 2.37 (s, 3H), 1.67 (s, 6H); MS (ESI) m/z 344/346 ([M−H]−, 100%); Anal. Calcd. For C17H16BrNO2: C, 58.98; H, 4.66; N, 4.05. Found: C, 58.82; H, 4.62; N, 3.94.

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