4-bromo-N,N-diethylbenzenesulfonamide

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

Procedure: To 14.5 g of N,N-diethyl-4-bromobenzenesulfonamide (50 mmol) (prepared by reaction of 4-bromobenzenesulfonyl chloride with diethylamine) was added 13.8 g of tetrabutylammonium chloride (50 mmol), 10.3 g of NaHCO3 (124 mmol), 266 mg of palladium (II) acetate (1.07 mmol) and 100 mL of DMF in the order given. To this suspension was added 8.8 ml of methyl acrylate (98 mmol) and the reaction was stirred 1 hour at 80°. The reaction was cooled, 500 mL of water and 900 mL of ether were added, the layers were separated and the ether layer was filtered to remove Pd (0) and combined with 2 further ether washes of the aqueous phase. The combined ether solutions were dried over MgSO4, filtered, stripped and recrystallized from methanol/ether to yield 9.4 g of methyl 4-(diethylaminosulfonyl)benzene-2-propenoate. Six grams of the propenoate was reduced in ethanol at 3.5 atm over 10% Pd on carbon in a Parr Shaker to produce 5.9 g of product as a yellow oil. It was used in that form in Example 269. The reaction was cooled the layers were separated the ether layer was filtered to remove Pd (0) The combined ether solutions were dried over MgSO4 filtered recrystallized from methanol/ether

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

Procedure: To 14.5 g of N,N-diethyl-4-bromobenzenesulfonamide (50 mmol) (prepared by reaction of 4-bromobenzenesulfonyl chloride with diethylamine) was added 13.8 g of tetrabutylammonium chloride (50 mmol), 10.3 g of NaHCO3 (124 mmol), 266 mg of palladium (II) acetate (1.07 mmol) and 100 mL of DMF in the order given. To this suspension was added 8.8 ml of methyl acrylate (98 mmol) and the reaction was stirred 1 hour at 80°. The reaction was cooled, 500 mL of water and 900 mL of ether were added, the layers were separated and the ether layer was filtered to remove Pd (0) and combined with 2 further ether washes of the aqueous phase. The combined ether solutions were dried over MgSO4, filtered, stripped and recrystallized from methanol/ether to yield 9.4 g of methyl 4-(diethylaminosulfonyl)benzene-2-propenoate. Six grams of the propenoate was reduced in ethanol at 3.5 atm over 10% Pd on carbon in a Parr Shaker to produce 5.9 g of product as a yellow oil. It was used in that form in Example 269. The reaction was cooled the layers were separated the ether layer was filtered to remove Pd (0) The combined ether solutions were dried over MgSO4 filtered recrystallized from methanol/ether

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

Procedure: To 14.5 g of N,N-diethyl-4-bromobenzenesulfonamide (50 mmol) (prepared by reaction of 4-bromobenzenesulfonyl chloride with diethylamine) was added 13.8 g of tetrabutylammonium chloride (50 mmol), 10.3 g of NaHCO3 (124 mmol), 266 mg of palladium (II) acetate (1.07 mmol) and 100 mL of DMF in the order given. To this suspension was added 8.8 ml of methyl acrylate (98 mmol) and the reaction was stirred 1 hour at 80°. The reaction was cooled, 500 mL of water and 900 mL of ether were added, the layers were separated and the ether layer was filtered to remove Pd (0) and combined with 2 further ether washes of the aqueous phase. The combined ether solutions were dried over MgSO4, filtered, stripped and recrystallized from methanol/ether to yield 9.4 g of methyl 4-(diethylaminosulfonyl)benzene-2-propenoate. Six grams of the propenoate was reduced in ethanol at 3.5 atm over 10% Pd on carbon in a Parr Shaker to produce 5.9 g of product as a yellow oil. It was used in that form in Example 269. The reaction was cooled the layers were separated the ether layer was filtered to remove Pd (0) The combined ether solutions were dried over MgSO4 filtered recrystallized from methanol/ether

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

Procedure: According to general procedure B, 4-bromo-N,N-diethylbenzenesulfonamide (117 mg, 0.40 mmol), 5-cyano-1-methyl-1H-pyrrol-2-ylboronic acid (72 mg, 0.48 mmol), potassium fluoride (76 mg, 1.3 mmol), and tris(dibenzylideneacetone)dipalladium(0) (10 mg, 0.01 mmol) were placed in an oven dried flask under nitrogen and dry THF (1.0 mL) was added. Tri-t-butylphosphine (60 μL, 0.02 mmol, 10 wt % in hexane) was added and the reaction was stirred for 16 hours. 4-(5-cyano-1-methyl-1H-pyrrol-2-yl)-N,N-diethylbenzenesulfonamide (27 mg, 21%) was provided after purification. MS (ESI) m/z 317. HPLC purity 100.0% at 210-370 nm, 10.8 min.; the Xterr® 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. were placed in an oven dried flask under nitrogen dry THF (1.0 mL) was added

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

Procedure: According to general procedure B, 4-bromo-N,N-diethylbenzenesulfonamide (117 mg, 0.40 mmol), 5-cyano-1-methyl-1H-pyrrol-2-ylboronic acid (72 mg, 0.48 mmol), potassium fluoride (76 mg, 1.3 mmol), and tris(dibenzylideneacetone)dipalladium(0) (10 mg, 0.01 mmol) were placed in an oven dried flask under nitrogen and dry THF (1.0 mL) was added. Tri-t-butylphosphine (60 μL, 0.02 mmol, 10 wt % in hexane) was added and the reaction was stirred for 16 hours. 4-(5-cyano-1-methyl-1H-pyrrol-2-yl)-N,N-diethylbenzenesulfonamide (27 mg, 21%) was provided after purification. MS (ESI) m/z 317. HPLC purity 100.0% at 210-370 nm, 10.8 min.; the Xterr® 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. were placed in an oven dried flask under nitrogen dry THF (1.0 mL) was added

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

Procedure: According to general procedure B, 4-bromo-N,N-diethylbenzenesulfonamide (117 mg, 0.40 mmol), 5-cyano-1-methyl-1H-pyrrol-2-ylboronic acid (72 mg, 0.48 mmol), potassium fluoride (76 mg, 1.3 mmol), and tris(dibenzylideneacetone)dipalladium(0) (10 mg, 0.01 mmol) were placed in an oven dried flask under nitrogen and dry THF (1.0 mL) was added. Tri-t-butylphosphine (60 μL, 0.02 mmol, 10 wt % in hexane) was added and the reaction was stirred for 16 hours. 4-(5-cyano-1-methyl-1H-pyrrol-2-yl)-N,N-diethylbenzenesulfonamide (27 mg, 21%) was provided after purification. MS (ESI) m/z 317. HPLC purity 100.0% at 210-370 nm, 10.8 min.; the Xterr® 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. were placed in an oven dried flask under nitrogen dry THF (1.0 mL) was added

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

Procedure: According to general procedure C, 4-Bromobenzene sulfonyl chloride (0.40 g, 1.56 mmol) and diethylamine (0.40 mL, 3.90 mmol) were stirred together in dry dichloromethane (5 mL) for 16 hours. 4-bromo-N,N-diethylbenzenesulfonamide (0.12 g) was provided after purification. MS (ESI) m/z 293. HPLC purity 99.2% at 210-370 nm, 9.4 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.

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

Procedure: To 14.5 g of N,N-diethyl-4-bromobenzenesulfonamide (50 mmol) (prepared by reaction of 4-bromobenzenesulfonyl chloride with diethylamine) was added 13.8 g of tetrabutylammonium chloride (50 mmol), 10.3 g of NaHCO3 (124 mmol), 266 mg of palladium (II) acetate (1.07 mmol) and 100 mL of DMF in the order given. To this suspension was added 8.8 ml of methyl acrylate (98 mmol) and the reaction was stirred 1 hour at 80°. The reaction was cooled, 500 mL of water and 900 mL of ether were added, the layers were separated and the ether layer was filtered to remove Pd (0) and combined with 2 further ether washes of the aqueous phase. The combined ether solutions were dried over MgSO4, filtered, stripped and recrystallized from methanol/ether to yield 9.4 g of methyl 4-(diethylaminosulfonyl) benzene-2-propenoate. Six grams of the propenoate was reduced in ethanol at 3.5 atm over 10% Pd on carbon in a Parr Shaker to produce 5.9 g of product as a yellow oil. It was used in that form in Example 269. The reaction was cooled the layers were separated the ether layer was filtered to remove Pd (0) The combined ether solutions were dried over MgSO4 filtered recrystallized from methanol/ether