Acetic Acid → HCID 69213333, compound

Participants

Reaction Steps

To a stirred suspension of 4-(4-chlorophenyl)-4-methyl-1,4-dihydro-2H-3,1-benzoxazin-2-one (5.15 g, 18.80 mmol) in a mixture of glacial acetic acid (15 mL) and concentrated sulfuric acid (15 mL) was slowly added concentrated nitric acid (3 mL). After 10 minutes the reaction was poured over ice and brine (100 mL) and filtered. Trituration of the solid with ethyl acetate/ether gave 4-(4-chlorophenyl)-4-methyl-6-nitro-1,4-dihydro-2H-3,1-benzoxazin-2-one as a tan solid (1.92 g, 32%). 1H NMR (DMSO-d6): δ 11.04 (s, 1H), 8.29 (m, 2H), 7.47 (dd, J=6.6, 2.0 Hz, 2H), 7.32 (dd, J=6.7, 2.1 Hz, 2H), 7.13 (d, J=9.5 Hz, 1H), 2.06 (s, 3H); MS (ESI) m/z [M+H]+(319/321); MS (ESI) m/z [M−H]− (317/319); Anal. calcd for C15H11ClN2O4: C, 56.53; H, 3.48; N, 8.79. Found: C, 55.43; H, 3.37; N, 8.78.

Provenance & Evidence