2-(4-fluorophenyl)ethanesulfonyl chloride

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

Procedure: To an ice cold, stirred solution of 0.2 g of piperidin-4-ylmethyl-carbamic acid tert-butyl ester and 0.2 mL of N,N-diisopropylethyl amine in 20 mL of dichloromethane was added 0.3 g of 2-(4-fluoro-phenyl)-ethanesulfonyl chloride. After stirring overnight, the mixture was diluted with 50 mL of chloroform, washed with 50 mL of saturated sodium carbonate, dried over magnesium sulfate and concentrated to dryness under reduced pressure. Trituration with hexane gave a white solid: washed with 50 mL of saturated sodium carbonate dried over magnesium sulfate concentrated to dryness under reduced pressure Trituration with hexane gave a white solid

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

Procedure: To an ice cold, stirred solution of 0.2 g of piperidin-4-ylmethyl-carbamic acid tert-butyl ester and 0.2 mL of N,N-diisopropylethyl amine in 20 mL of dichloromethane was added 0.3 g of 2-(4-fluoro-phenyl)-ethanesulfonyl chloride. After stirring overnight, the mixture was diluted with 50 mL of chloroform, washed with 50 mL of saturated sodium carbonate, dried over magnesium sulfate and concentrated to dryness under reduced pressure. Trituration with hexane gave a white solid: washed with 50 mL of saturated sodium carbonate dried over magnesium sulfate concentrated to dryness under reduced pressure Trituration with hexane gave a white solid

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

Procedure: A mixture of 2-(4-flourophenyl)ethanesulfonyl chloride (0.7 g, 3.3 mmol) and concentrated aqueous ammonia (0.88 specific gravity, 10 ml) in ethanol (5 ml) was stirred at room temperature overnight. The reaction mixture was diluted with water (10 ml), acidified to pH 4 with citric acid (1.0 M) and then extracted with dichloromethane. The organic extracts were dried by filtering through an organic-only, permeable membrane and then concentrated under vacuum. The residue was purified by chromatography on a Biotage® Flash 40 (s) column (40 g silica) using 10-20% ethyl acetate/dichloromethane as eluant to give the title compound as an off white solid, (0.66 g). extracted with dichloromethane The organic extracts were dried by filtering through an organic-only, permeable membrane concentrated under vacuum The residue was purified by chromatography on a Biotage® Flash 40 (s) column (40 g silica)

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

Procedure: A mixture of 2-(4-flourophenyl)ethanesulfonyl chloride (0.7 g, 3.3 mmol) and concentrated aqueous ammonia (0.88 specific gravity, 10 ml) in ethanol (5 ml) was stirred at room temperature overnight. The reaction mixture was diluted with water (10 ml), acidified to pH 4 with citric acid (1.0 M) and then extracted with dichloromethane. The organic extracts were dried by filtering through an organic-only, permeable membrane and then concentrated under vacuum. The residue was purified by chromatography on a Biotage® Flash 40 (s) column (40 g silica) using 10-20% ethyl acetate/dichloromethane as eluant to give the title compound as an off white solid, (0.66 g). extracted with dichloromethane The organic extracts were dried by filtering through an organic-only, permeable membrane concentrated under vacuum The residue was purified by chromatography on a Biotage® Flash 40 (s) column (40 g silica)

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

Procedure: Phosphorus pentachloride (5.6 g, 27 mmol) was added portionwise over 10 minutes to a stirred suspension of 2-(4-fluorophenyl)ethanesulfonic acid sodium salt (9 mmol, contaminated with sodium bromide, total weight 2.87 g) in dry toluene (15 ml) at room temperature. The reaction mixture was heated under reflux for 90 minutes and was then stirred at room temperature overnight. The reaction mixture was diluted with water (20 ml) and the organic phase was separated. The aqueous phase was extracted with dichloromethane (20 ml) and the organic extracts were combined, dried over magnesium sulfate and concentrated under vacuum to give the title compound as an oil, (0.7 g) Rf 0.92 (dichloromethane). The reaction mixture was heated under reflux for 90 minutes the organic phase was separated The aqueous phase was extracted with dichloromethane (20 ml) dried over magnesium sulfate concentrated under vacuum

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

Procedure: To an ice cold, stirred solution of 0.2 g of piperidin-4-ylmethyl-carbamic acid tert-butyl ester and 0.2 mL of N,N-diisopropylethylamine in 20 mL of dichloromethane was added 0.3 g of 2-(4-fluoro-phenyl)-ethanesulfonyl chloride. After stirring overnight the mixture was diluted with 50 mL of chloroform, washed with 50 mL of saturated sodium carbonate, dried over magnesium sulfate and concentrated to dryness under reduced pressure. Trituration with hexane gave a white solid: washed with 50 mL of saturated sodium carbonate dried over magnesium sulfate concentrated to dryness under reduced pressure Trituration with hexane gave a white solid

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

Procedure: To an ice cold, stirred solution of 0.2 g of piperidin-4-ylmethyl-carbamic acid tert-butyl ester and 0.2 mL of N,N-diisopropylethylamine in 20 mL of dichloromethane was added 0.3 g of 2-(4-fluoro-phenyl)-ethanesulfonyl chloride. After stirring overnight the mixture was diluted with 50 mL of chloroform, washed with 50 mL of saturated sodium carbonate, dried over magnesium sulfate and concentrated to dryness under reduced pressure. Trituration with hexane gave a white solid: washed with 50 mL of saturated sodium carbonate dried over magnesium sulfate concentrated to dryness under reduced pressure Trituration with hexane gave a white solid

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

Procedure: To an ice cold, stirred solution of 0.2 g of piperidin-4-ylmethyl-carbamic acid tert-butyl ester and 0.2 mL of N,N-diisopropylethyl amine in 20 mL of dichloromethane was added 0.3 g of 2-(4-fluoro-phenyl)-ethanesulfonyl chloride. After stirring overnight, the mixture was diluted with 50 mL of chloroform, washed with 50 mL of saturated sodium carbonate, dried over magnesium sulfate and concentrated to dryness under reduced pressure. Trituration with hexane gave a white solid: washed with 50 mL of saturated sodium carbonate dried over magnesium sulfate concentrated to dryness under reduced pressure Trituration with hexane gave a white solid

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

Procedure: A mixture of 2-(4-flourophenyl)ethanesulfonyl chloride (0.7 g, 3.3 mmol) and concentrated aqueous ammonia (0.88 specific gravity, 10 ml) in ethanol (5 ml) was stirred at room temperature overnight. The reaction mixture was diluted with water (10 ml), acidified to pH 4 with citric acid (1.0 M) and then extracted with dichloromethane. The organic extracts were dried by filtering through an organic-only, permeable membrane and then concentrated under vacuum. The residue was purified by chromatography on a Biotage® Flash 40 (s) column (40 g silica) using 10-20% ethyl acetate/dichloromethane as eluant to give the title compound as an off white solid, (0.66 g). extracted with dichloromethane The organic extracts were dried by filtering through an organic-only, permeable membrane concentrated under vacuum The residue was purified by chromatography on a Biotage® Flash 40 (s) column (40 g silica)

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

Procedure: Phosphorus pentachloride (5.6 g, 27 mmol) was added portionwise over 10 minutes to a stirred suspension of 2-(4-fluorophenyl)ethanesulfonic acid sodium salt (9 mmol, contaminated with sodium bromide, total weight 2.87 g) in dry toluene (15 ml) at room temperature. The reaction mixture was heated under reflux for 90 minutes and was then stirred at room temperature overnight. The reaction mixture was diluted with water (20 ml) and the organic phase was separated. The aqueous phase was extracted with dichloromethane (20 ml) and the organic extracts were combined, dried over magnesium sulfate and concentrated under vacuum to give the title compound as an oil, (0.7 g) Rf 0.92 (dichloromethane). The reaction mixture was heated under reflux for 90 minutes the organic phase was separated The aqueous phase was extracted with dichloromethane (20 ml) dried over magnesium sulfate concentrated under vacuum