反应详情

A mixture of 3,5-difluoro-4-methylbenzenesulfonamide (1.237 g, 6 mmol), N-bromosuccinimide (1.4 g, 1.3 eq) and benzoyl peroxide (87 mg, 0.1 eq) in carbon tetrachloride (24 mL) was heated to reflux for 6 h under a halogen light. After the reaction was determined to be complete by GC-MS, the mixture was concentrated and purified by column chromatography (silica, EtOAc-hexane, 1:4 to 4:1) to give the title compound (524 mg). 1H NMR (400 MHz, CD3OD) δ 7.75 (d, 2H), 4.83 (s, 3H); GC-MS (ES) m/z 285 (M), 287 (M+2).

1. temperaturewas heated
2. temperatureto reflux for 6 h under a halogen light
3. concentrationthe mixture was concentrated
4. custompurified by column chromatography (silica, EtOAc-hexane, 1:4 to 4:1)