Chlorosulfonic acid → 3,5-Dichloro-2,4,6-trifluorophenylsulfonyl chloride

Participants

Reaction Conditions

Reaction Steps

1,3-Dichloro-2,4,6-trifluorobenzene (5.0 g, 25 mmol) and chlorosulfonic acid (10.0 mL, 150 mmol) were mixed at ambient temperature under a nitrogen atmosphere and the reaction was heated at 80° C. for 24 h. The mixture was then allowed to cool to ambient temperature and was poured onto 12 g of crushed ice. The product was extracted with diethyl ether, dried over MgSO4, and the solvent was evaporated to produce 4.9 g of the title compound, which was used without further purification. MS (EI): 300 (30, M+), 298 (28), 263 (100), 199 (80).

Provenance & Evidence