Brofoxine → 6-Bromo-4,4-dimethyl-1,4-dihydro-benzo[d][1,3]oxazin-2-thione

Participants

Reaction Steps

The product was prepared, from 6-bromo-4,4-dimethyl-1,4-dihydro-benzo[d][1,3]oxazin-2-one and Lawesson's reagent using the procedure of Example 9, as a white solid: mp 221–222.5° C.; 1H-NMR (CDCl3) δ 9.38 (s, 1H, D2O exchangeable), 7.42 (dd, 1H, J=8.5, 2.1 Hz), 7.29 (d, 1H, J=2.0 Hz), 6.76 (d, 1H, J=8.4 Hz), 1.76 (s, 6H); MS (EI) m/z 272 ([M+H]+, 94%), 274 ([M+H]+, 100%).

Provenance & Evidence