4-BROMO-3,5-DIFLUOROBENZENESULPHONYL CHLORIDE

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 4-bromo-3,5-difluorobenzene-1-sulfonyl chloride (1462 mg, 5.02 mmol) in pyridine (10 mL) at 20° C. was added N-isobutyl-2,4-dimethylaniline (889 mg, 5.01 mmol) and the reaction mixture was stirred at 20° C. for 2 hours. The reaction mixture was then evaporated in vacuo and redissolved in ethyl acetate. The organic phase was washed with saturated sodium carbonate (25 mL), dried using a hydrophobic frit and evaporated in vacuo to give the required product as a yellow oil, 2.06 g. LCMS [LCMS2] Rt 1.57 min, m/z (ES+) 432/434 (M+H). The reaction mixture was then evaporated in vacuo redissolved in ethyl acetate The organic phase was washed with saturated sodium carbonate (25 mL) dried evaporated in vacuo