反应详情

2-Amino-5-chlorobenzaldehyde (2.1 g, 13.5 mmol) was dissolved in chloroform (20 mL) and treated with N-bromosuccinimide (2.6 g, 14.9 mmol). The reaction was stirred for 30 min at ambient temperature. The reaction was diluted with methylene chloride and washed with sodium thiosulfate (2×), 5% sodium bicarbonate (2×), water (2×), brine, dried over sodium sulfate, and concentrated to afford 3.0 g (95%) as a pale yellow powder. 1H-NMR (CDCl3, 500 MHz) δ 9.75 (s, 1H), 7.60 (d, J=2.4 Hz, 1H), 7.45 (d, J=2.4 Hz, 1H). Mass spec.: 236.01 (MH)+.

1. washwashed with sodium thiosulfate (2×), 5% sodium bicarbonate (2×), water (2×), brine
2. dry with materialdried over sodium sulfate
3. concentrationconcentrated
4. customto afford 3.0 g (95%) as a pale yellow powder