Nitric Acid → HCID 25140617, compound

Participants

Reaction Conditions

Reaction Steps

A solution of nitric acid (70%, 3.2 mL, 50.3 mmol) in TFA (5 mL) was added dropwise to a stirred solution of acetamide 91 (3.93 g, 16.8 mmol) in TFA (40 mL) and the solution stirred at 20° C. for 2 h. The solution was poured into ice/water (400 mL) and stirred for 30 min. The precipitate was filtered, washed with water (3×30 mL), and dried. The solid was purified by chromatography, eluting with 10% EtOAc/pet. ether, to give nitroacetamide 92 (3.79 g, 96%) as a red solid: mp (EtOAc/pet. ether) 99-100° C.; 1H NMR δ 10.41 (br s, 1H, NH), 8.50 (s, 1H, H-7), 8.00 (s, 1H, H-4), 3.03-3.13 (m, 2H, CH2), 2.51-2.67 (m, 3H, H-2, CH2), 2.29 (s, 3H, COCH3), 1.14 (d, J=6.4 Hz, 3H, CH3); 13C NMR δ 169.0, 153.9, 139.4, 135.3, 133.7, 121.1, 117.7, 41.6, 40.2, 34.7, 25.6, 20.4. Anal. calcd for C12H14N2O3: C, 61.5; H, 6.0; N, 12.0. Found: C, 61.6; H, 6.2; N, 11.5%.

Provenance & Evidence