4-bromo-2,5-difluoro-N-methylbenzenesulfonamide

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

Procedure: According to general procedure B, 4-bromo-2,5-difluoro-N-methylbenzenesulfonamide (143 mg, 0.5 mmol), 5-cyano-1-methyl-1H-pyrrol-2-ylboronic acid (90 mg, 0.60 mmol), potassium fluoride (96 mg, 1.65 mmol), and tris(dibenzylideneacetone)dipalladium (12 mg, 0.013 mmol) were placed in an oven dried flask under nitrogen and dry THF (1.3 mL) was added. Tri-t-butylphosphine (75 μL, 0.026 mmol, 10 wt % in hexane) was added and the reaction was stirred for 16 hours. Purification afforded 4-(5-cyano-1-methyl-1H-pyrrol-2-yl)-2,5-difluoro-N-methylbenzenesulfonamide (24 mg). HPLC purity 87.6% at 210-370 nm, 8.4 min.; the Xterra® RP18 column, 3.5μ, 150×4.6 mm column, 1.2 mL/min., 85/15-5/95 (ammonium formate buffer pH=3.5/ACN+MeOH) for 10 min., hold 4 min. HRMS: calcd for C13H11F2N3O2S−H+, 310.04673; found (ESI-FTMS, [M−H]−1), 310.04692 were placed in an oven dried flask under nitrogen dry THF (1.3 mL) was added Purification

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

Procedure: According to general procedure C, 4-Bromo-2,5-difluorobenzenesulfonyl chloride (0.20 g, 0.68 mmol) and methylamine were stirred together in dichloromethane (1 mL) for 16 hours. The reaction afforded 4-bromo-2,5-difluoro-N-methylbenzenesulfonamide (0.17 g) after purification. HPLC purity 100.0% at 210-370 nm, 9.2 min.; the Xterra® RP18 column, 3.5μ, 150×4.6 mm column, 1.2 mL/min., 85/15-5/95 (ammonium formate buffer pH=3.5/ACN+MeOH) for 10 min., hold 4 min. HRMS: calcd for C7H6BrF2NO2S−H+, 283.91979; found (ESI-FTMS, [M−H]1−), 283.92003

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

Procedure: According to general procedure C, 4-Bromo-2,5-difluorobenzenesulfonyl chloride (0.20 g, 0.68 mmol) and methylamine were stirred together in dichloromethane (1 mL) for 16 hours. The reaction afforded 4-bromo-2,5-difluoro-N-methylbenzenesulfonamide (0.17 g) after purification. HPLC purity 100.0% at 210-370 nm, 9.2 min.; the Xterra® RP18 column, 3.5μ, 150×4.6 mm column, 1.2 mL/min., 85/15-5/95 (ammonium formate buffer pH=3.5/ACN+MeOH) for 10 min., hold 4 min. HRMS: calcd for C7H6BrF2NO2S−H+, 283.91979; found (ESI-FTMS, [M−H]1−), 283.92003