1,4-thiazinane 1,1-dioxide;hydrochloride

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

Procedure: 2-Chloroethyl chloroformate (0.72 ml, 6.7 mmol) was added dropwise to a solution of 4-methylthiomorpholine-1,1-dioxide (11.0 g, 6.7 mmol) in toluene (10 ml) at 0° C. under N2. After 10 min, the reaction was warmed and maintained at reflux for 2 h. On cooling, the reaction mixture was evaporated, partitioned between EtOAc and H2O, the organic layer separated and washed sequentially with dilute HCl and saturated brine, the organic layer dried over Na2SO4 and evaporated. The residue was taken up in MeOH (10 ml) and heated at reflux for 2 h, after which time the reaction mixture was evaporated and triturated with EtOAc to afford the subtitle compound (415 mg, 36%) as a solid. Rf 0.34 (CH2Cl2/MeOH/0.88NH3 90/10/1, v/v). MS m/z 136 (MH+). the reaction was warmed maintained at reflux for 2 h On cooling the reaction mixture was evaporated partitioned between EtOAc and H2O the organic layer separated washed sequentially with dilute HCl and saturated brine the organic layer dried over Na2SO4 evaporated heated at reflux for 2 h after which time the reaction mixture was evaporated triturated with EtOAc

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

Procedure: A mixture of 3-[2-amino-4-(4-chlorophenyl)-5-thiazolyl]propionic acid (2.67 g), diethyl cyanophosphate (1.69 g), thiomorpholine-1,1-dioxide hydrochloride (1.62 g), triethylamine (2.9 ml) and N,N-dimethylformamide (40 ml) was stirred at room temperature for 3 hrs. The reaction mixture as poured into water, extracted with ethyl acetate, washed with 0.1N aqueous sodium hydroxide solution and water, dried over anhydrous magnesium sulfate and concentrated. The precipitated solid was collected by filtration to give 4-{3-[2-amino-4-(4-chlorophenyl)-5-thiazolyl]propanoyl}thiomorpholine-1,1-dioxide as a colorless powder. Recrystallization from ethanol-isopropyl ether gave colorless prism crystals. melting point: 220–222° C. extracted with ethyl acetate washed with 0.1N aqueous sodium hydroxide solution and water dried over anhydrous magnesium sulfate concentrated The precipitated solid was collected by filtration

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

Procedure: Prepared as described in general procedure (P) using 1,1-dicyclohexyl-3-(5-formyl-thiazol-2-yl)-urea (67 mg. 0.20 mmol), 1,1-dioxo-thiomorpholine hydrochloride (52 mg, 0.30 mmol) and sodium triacetoxyborohydride (51 mg, 0.24 mmol) to afford 16 mg (18%) of the desired product after purification. Prepared

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

Procedure: Prepared as described in general procedure (P) using 1,1-dicyclohexyl-3-(5-formyl-thiazol-2-yl)-urea (67 mg. 0.20 mmol), 1,1-dioxo-thiomorpholine hydrochloride (52 mg, 0.30 mmol) and sodium triacetoxyborohydride (51 mg, 0.24 mmol) to afford 16 mg (18%) of the desired product after purification. Prepared

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

Procedure: 6-[3-(4-Fluoro-phenyl)-5-methyl-isoxazol-4-ylmethoxy]-nicotinic acid (23.0 g, 70.1 mmol) and 1,1-carbonyldiimidazole (15.3 g, 94.6 mol, 1.35 eq.) were dissolved in THF (120 mL) and the resulting solution was stirred for one hour at room temperature. This solution was then added to a suspension of thiomorpholine-1,1-dioxide HCl (16.9 g, 98.5 mmol), DMAP (400 mg, 3.27 mmol) and triethylamine (9.78 g, 96.7 mmol) in THF (120 mL). The resulting mixture was heated to reflux temperature and subsequently stirred at this temperature for 50 hours. The mixture was cooled to room temperature and then treated within one hour with water (300 mL). From the resulting suspension THF was distilled off under reduced pressure and with a jacket temperature of 60° C. and continuously replaced by ethanol (426 g) at constant volume. The suspension was cooled to room temperature and stirred for 2 hours. The crystals were filtered off, washed with a mixture of ethanol (100 mL) and water (100 mL) and subsequently dried at 55° C./<25 mbar until constant weight to afford 28.9 g (92%) of Form B as a colorless solid with purity of 99.7% (area) as measured by HPLC. The resulting mixture was heated to reflux temperature subsequently stirred at this temperature for 50 hours The mixture was cooled to room temperature From the resulting suspension THF was distilled off under reduced pressure and with a jacket temperature of 60° C. The suspension was cooled to room temperature stirred for 2 hours The crystals were filtered off washed with a mixture of ethanol (100 mL) and water (100 mL) subsequently dried at 55° C./<25 mbar until constant weight to afford 28.9 g (92%) of Form B as a colorless solid with purity of 99.7% (area)

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

Procedure: 6-[3-(4-Fluoro-phenyl)-5-methyl-isoxazol-4-ylmethoxy]-nicotinic acid (23.0 g, 70.1 mmol) and 1,1-carbonyldiimidazole (15.3 g, 94.6 mol, 1.35 eq.) were dissolved in THF (120 mL) and the resulting solution was stirred for one hour at room temperature. This solution was then added to a suspension of thiomorpholine-1,1-dioxide HCl (16.9 g, 98.5 mmol), DMAP (400 mg, 3.27 mmol) and triethylamine (9.78 g, 96.7 mmol) in THF (120 mL). The resulting mixture was heated to reflux temperature and subsequently stirred at this temperature for 50 hours. The mixture was cooled to room temperature and then treated within one hour with water (300 mL). From the resulting suspension THF was distilled off under reduced pressure and with a jacket temperature of 60° C. and continuously replaced by ethanol (426 g) at constant volume. The suspension was cooled to room temperature and stirred for 2 hours. The crystals were filtered off, washed with a mixture of ethanol (100 mL) and water (100 mL) and subsequently dried at 55° C./<25 mbar until constant weight to afford 28.9 g (92%) of Form B as a colorless solid with purity of 99.7% (area) as measured by HPLC. The resulting mixture was heated to reflux temperature subsequently stirred at this temperature for 50 hours The mixture was cooled to room temperature From the resulting suspension THF was distilled off under reduced pressure and with a jacket temperature of 60° C. The suspension was cooled to room temperature stirred for 2 hours The crystals were filtered off washed with a mixture of ethanol (100 mL) and water (100 mL) subsequently dried at 55° C./<25 mbar until constant weight to afford 28.9 g (92%) of Form B as a colorless solid with purity of 99.7% (area)

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

Procedure: To a solution of 4-chloro-1-methyl-1H-pyrrolo[3,2-c]pyridine-7-carboxylic acid (726 mg) in dimethylformamide (12 ml) was added 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide (0.73 g), 1-hydroxybenzotriazole (0.52 g), N-ethylmorpholine (0.48 ml) and thiomorpholine 1,1-dioxide hydrochloride (0.66 g). The solution was stirred at room temperature overnight. The reaction was diluted with water and extracted three times with ethyl acetate. The ethyl acetate layers were combined, washed with saturated sodium chloride solution and dried (MgSO4) then evaporated. The residue was triturated with diethyl ether/n-hexane and filtered to afford the title compound as an off-white solid (0.907 g). extracted three times with ethyl acetate washed with saturated sodium chloride solution dried (MgSO4) then evaporated The residue was triturated with diethyl ether/n-hexane filtered

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

Procedure: 17.0 g (99.2 mmol) of thiomorpholine 1,1-dioxide hydrochloride were initially charged in 100 ml of dichloromethane and, while cooling with an ice bath, admixed with 20.7 ml (15.1 g, 148.8 mmol) of triethylamine. 10.0 g (49.6 mmol) of 4-nitrophenyl chloroformate were added in portions. The reaction mixture was stirred at RT for 30 minutes, admixed with water and ethyl acetate and then filtered. The residue was dried under high vacuum. Yield: 12.4 g (83% of theory) while cooling with an ice bath filtered The residue was dried under high vacuum

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

Procedure: Prepared as described in general procedure (P) using 1,1-dicyclohexyl-3-(5-formyl-thiazol-2-yl)-urea (67 mg, 0.20 mmol), 1,1-dioxo-thiomorpholine hydrochloride (52 mg, 0.30 mmol) and sodium triacetoxyborohydride (51 mg, 0.24 mmol) to afford 16 mg (18%) of the desired product after purification. Prepared

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

Procedure: 2-Chloroethyl chloroformate (0.72 ml, 6.7 mmol) was added dropwise to a solution of 4-methylthiomorpholine-1,1-dioxide (1.0 g, 6.7 mmol) in toluene (10 ml) at 0° C. under N2. After 10 min, the reaction was warmed and maintained at reflux for 2 h. On cooling, the reaction mixture was evaporated and partitioned between EtOAc and H2O. The organic layer was separated and washed sequentially with dilute HCl and saturated brine, then dried over Na2SO4 and evaporated. The residue was taken up in MeOH (10 ml) and heated at reflux for 2 h, after which time the mixture was evaporated and triturated with EtOAc to afford the subtitle compound (415 mg, 36%) as a solid. Rf 0.34 (CH2Cl2/MeOH/0.88 NH3 90/10/1, v/v). MS m/z 136 (MH+). the reaction was warmed maintained at reflux for 2 h On cooling the reaction mixture was evaporated partitioned between EtOAc and H2O The organic layer was separated washed sequentially with dilute HCl and saturated brine dried over Na2SO4 evaporated heated at reflux for 2 h after which time the mixture was evaporated triturated with EtOAc

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

Procedure: 2-Chloroethyl chloroformate (0.72 ml, 6.7 mmol) was added dropwise to a solution of 4-methylthiomorpholine-1,1-dioxide (1.0 g, 6.7 mmol) in toluene (10 ml) at 0° C. under N2. After 10 min, the reaction was warmed and maintained at reflux for 2 h. On cooling, the reaction mixture was evaporated, partitioned between EtOAc and H2O, the organic layer separated and washed sequentially with dilute HCl and saturated brine, the organic layer dried over Na2SO4 and evaporated. The residue was taken up in MeOH (10 ml) and heated at reflux for 2 h, after which time the reaction mixture was evaporated and triturated with EtOAc to afford the subtitle compound (415 mg, 36%) as a solid. Rf 0.34 (CH2Cl2/MeOH/0.88NH3 90/10/1, v/v). MS m/z 136 (MH+). the reaction was warmed maintained at reflux for 2 h On cooling the reaction mixture was evaporated partitioned between EtOAc and H2O the organic layer separated washed sequentially with dilute HCl and saturated brine the organic layer dried over Na2SO4 evaporated heated at reflux for 2 h after which time the reaction mixture was evaporated triturated with EtOAc

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

Procedure: 2-Chloroethyl chloroformate (0.72 ml, 6.7 mmol) was added dropwise to a solution of 4-methylthiomorpholine-1,1-dioxide (1.0 g, 6.7 mmol) in toluene (10 ml) at 0° C. under N2. After 10 min, the reaction was warmed and maintained at reflux for 2 h. On cooling, the reaction mixture was evaporated, partitioned between EtOAc and H2O, the organic layer separated and washed sequentially with dilute HCl and saturated brine, the organic layer dried over Na2SO4 and evaporated. The residue was taken up in MeOH (10 ml) and heated at reflux for 2 h, after which time the reaction mixture was evaporated and triturated with EtOAc to afford the subtitle compound (415 mg, 36%) as a solid. Rf 0.34 (CH2Cl2/MeOH/0.88NH3 90/10/1, v/v). MS m/z 136 (MH+). the reaction was warmed maintained at reflux for 2 h On cooling the reaction mixture was evaporated partitioned between EtOAc and H2O the organic layer separated washed sequentially with dilute HCl and saturated brine the organic layer dried over Na2SO4 evaporated heated at reflux for 2 h after which time the reaction mixture was evaporated triturated with EtOAc