反应详情

Chromium trioxide (1.2 g, 11.7 mmol) was added to a solution of (4-bromophenyl)(trifluoromethyl)sulfane (1.5 g, 5.83 mmol), concentrated H2SO4 (6 mL), and H2O (10 mL). After stirring at rt for 2 h, the reaction mixture was poured into ice-water and extracted with EtOAc (3×60 mL). The combined organic layers were dried (MgSO4), concentrated, and purified by column chromatography on silica gel (EtOAc/petroleum ether=1:100) to give 960 mg of 1-bromo-4-((trifluoromethyl)sulfonyl)benzene as a white solid. 1H NMR (CDCl3, 400 MHz): δ 7.89 (d, 2H), 7.85-7.81 (m, 2H). 13C NMR (CDCl3, 100 MHz): δ 133.4, 132.8, 132.1, 130.4, 119.7 (q, J=320 Hz).

1. extractionextracted with EtOAc (3×60 mL)
2. dry with materialThe combined organic layers were dried (MgSO4)
3. concentrationconcentrated
4. custompurified by column chromatography on silica gel (EtOAc/petroleum ether=1:100)