Nitric Acid → 5-[(4-Fluorophenyl)methyl]-3-nitropyridin-2(1H)-one

Participants

Reaction Steps

A solution of 90% HNO3 (57 mL, 1.22 mol) was added slowly to a stirred solution of 5-[(4-fluorophenyl)methyl]-2(1H)-pyridinone (249 g, 1.22 mol) in TFA (750 mL). The solution was heated at 75° C. for 2 h during which time additional 90% HNO3 (25 mL, 0.5 mol) was added. Water (1L) was added slowly and most of the TFA was removed by distillation. The mixture was allowed to cool to rt and the product was isolated by filtration as a yellow solid: 1H NMR (d6-DMSO) δ 12.76 (1H, br), 8.31 (1H, d, J=2.4 Hz), 7.80 (1H, d, J=2.4 Hz), 7.30 (2H, dd, J=8.6, 5.7 Hz), 7.11 (2H, t, J=8.6 Hz), 3.76 (2H, s); ES+ MS: 249 (M+H+, 100).

Provenance & Evidence