N-bromobutanimide → HCID 49766558, compound

Participants

Reaction Steps

A solution of 2-amino-5-nitrophenol (97, 24 g, 156 mmol) in CH3CN (1 L) was treated with NBS (28.8 g, 160.8 mmol) at room temperature. After stirring for 1 hour, the solvent was removed to afford brown precipitate, which was taken up with ethyl acetate:hexane (1:1). The precipitate was filtered and was used for the next step without further purification (33 g, 91%). A small amount of sample was purified by column chromatography on silica gel for analysis; 1H NMR (500 MHz, CD3OD): δ 4.93 (brs, 3H), 7.50 (d, 1H, J=2.4 Hz), 7.89 (d, 1H, J=2.4 Hz); 13C NMR (125 MHz, CD3OD): δ 105.5, 108.7, 121.8, 138.5, 143.7, 144.8; HRMS (FAB) calcd for C6H5BrN2O3(M+) 231.9484. found 231.9479.

Provenance & Evidence