反应详情

5-(4,4-Dimethyl-2-oxo-1,4-dihydro-2H-benzo[d][1,3]oxazin-6-yl)-furan-2-carbonitrile was prepared, according to the procedure of Example 5 from 2-bromo-5-cyanofuran (1.0 g, 5.6 mmol) (J. Med. Chem. (1997), 40(23), 3804–3819) and (1,4-dihydro-4,4-dimethyl-2-oxo-2H-3,1-benzoxazin-6-yl)boronic acid (1.8 g, 8.18 mmol), as a white solid (0.39 g, 1.45 mmol, 17%): mp 257–260° C.; 1H-NMR (DMSO-d6) δ 10.48 (s, 1H), 7.73–7.70 (m, 3H), 7.19 (d, 1 H, J=3.8 Hz), 6.98 (d, 1 H, J=8.9 Hz), 1.66 (s, 6H); MS ((+)-APCI) m/z=269 (M+H)+.