1-(Phenylsulfonyl)Piperazine Hydrochloride(WXC02506)

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

Procedure: A 250 mL round-bottomed flask was charged with 1-(phenylsulfonyl)piperazine hydrochloride (4.08 g, 15.51 mmol, Example 15, step 1), 5-bromo-2-chloropyrimidine (2.50 g, 12.92 mmol, Sigma-Aldrich, St. Louis, Mo.), and 20 mL of dioxane. To this was added triethylamine (4.50 mL, 32.3 mmol). After stirring at room temperature for 3 h, the mixture was diluted with water (50 mL) and the resulting precipitate was collected by filtration to give 5-bromo-2-(4-(phenylsulfonyl)-1-piperazinyl)pyrimidine (2.50 g) as a white solid. the resulting precipitate was collected by filtration

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 350 ml, pressure vessel was charged with 4-(phenylsulfonyl)piperazine hydrochloride (1.50 g, 5.71 mmol, Example 15, step 1), 2,5-dibromopyridine (1.76 g, 7.42 mmol, Sigma-Aldrich, St. Louis, Mo.), 100 mL of toluene, sodium tert-butoxide (1.37 g, 14.3 mmol), tris(dibenzylideneacetone)dipalladium (0) (0.105 g, 0.114 mmol, Strem Chemical Inc, Newburyport, Mass.), and 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (XantPhos) (0.198 g, 0.343 mmol, Strem Chemical Inc, Newburyport, Mass.). The tube was sealed and heated at 110° C. for 3 h. After that time, the reaction was cooled to room temperature, diluted with water (20 mL) and extracted with EtOAc (2×50 mL). The organic layer was separated, dried (MgSO4) and concentrated to give a yellow solid. This solid was slurried with cold (0° C.) MeOH (25 mL) to give 1-(5-bromo-2-pyridinyl)-4-(phenylsulfonyl)piperazine (0.957 g) as a light yellow solid. The tube was sealed After that time, the reaction was cooled to room temperature extracted with EtOAc (2×50 mL) The organic layer was separated dried (MgSO4) concentrated to give a yellow solid

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A 125 ml, pressure tube was charged with 2,2,2-trifluoro-1-(4-fluorophenyl)ethanone (7.31 g, 38.1 mmol, Sigma-Aldrich, St. Louis, Mo.), 1-(phenylsulfonyl)piperazine hydrochloride (5.00 g, 19.0 mmol), 20 mL of CH3CN, and triethylamine (7.96 mL, 57.1 mmol). The tube was sealed and heated at 110° C. for 3 h. After that time, the mixture was diluted with EtOAc (100 mL) and water (50 mL). The organics were separated, dried (MgSO4) and concentrated to give a white solid. This solid was slurried with hexane (150 mL) to give 2,2,2-trifluoro-1-(4-(4-(phenylsulfonyl)-1-piperazinyl)phenyl)ethanone (3.85 g) as a bright white solid. The tube was sealed The organics were separated dried (MgSO4) concentrated to give a white solid

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

Procedure: A 500 ml, round-bottomed flask was charged with 1-Boc-piperazine (18.55 g, 100 mmol, Sigma-Aldrich, St. Louis, Mo.), triethylamine (18.05 mL, 129 mmol), and 200 mL of CH2Cl2. To this was added benzenesulfonyl chloride (16.05 mL, 124 mmol, Sigma-Aldrich, St. Louis, Mo.). After 15 min, the mixture was diluted with water (150 mL) and the layers were separated. The organics were dried (MgSO4) and concentrated to give a white solid. This solid was dissolved in EtOAc (300 mL) and 150 mL of 4N HCl in dioxane. After 3 h at 65° C., the white precipitate was filtered to give 1-(phenylsulfonyl)piperazine hydrochloride (21.0 g) as a white solid. the layers were separated The organics were dried (MgSO4) concentrated to give a white solid After 3 h at 65° C. the white precipitate was filtered