反应详情

Perchloric acid (0.025 mL, 0.28 mmol) was added to a rapidly stirring suspension of N-bromosuccinimide (5.06 g, 28.4 mmol) and 2-(thiophen-3-yl)acetonitrile (3.50 g, 28.4 mmol) in carbon tetrachloride (15 mL). After 4 h at room temperature, the reaction mixture was treated with solid NaHCO3 (100 mg, 1.2 mmol), then filtered and concentrated. The residue was purified by chromatography, eluting with a gradient of 2-15% EtOAc/hexanes to afford pure 2-(2-bromothiophen-3-yl)acetonitrile as a pale green oil (2.44 g, 12.1 mmol, 43% yield). MS (M+H)+ 202/204.

1. filtrationfiltered
2. concentrationconcentrated
3. customThe residue was purified by chromatography
4. washeluting with a gradient of 2-15% EtOAc/hexanes