反应详情

20.9 g (0.1 mol) of 3-fluoro-4-methylbenzenesulphonyl chloride are taken up in 200 ml of carbon tetrachloride and, after addition of 19.6 g (0.11 mol) of N-bromosuccinimide and 0.3 g of dibenzoyl peroxide, the mixture is heated under reflux for 5 hours. After cooling, the solids are filtered off and the filtrate is freed from the solvent. Flash chromatography with petroleum ether/toluene (4:1), 50 μm particle size, gives 12.4 g (44% of theory) of the title compound. Rf : 0.42 (petroleum ether/toluene 3:1).

1. temperaturethe mixture is heated
2. temperatureunder reflux for 5 hours
3. temperatureAfter cooling
4. filtrationthe solids are filtered off