3-oxa-9-azabicyclo[3.3.1]nonan-7-one

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: To a stirring mixture of 3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one (408 mg, 2.3 mmol) in dichloromethane (8 mL) was added Et3N (1.2 mL, 9.2 mmol) and 4-chlorobenzenesulfonyl chloride (582 mg, 2.76 mmol). The reaction mixture was stirred at room temperature for 2 h. The reaction mixture was diluted with dichloromethane (50 mL) and washed with a saturated aqueous NaHCO3 solution (15 mL). The aqueous phase was separated and extracted twice with EtOAc (2×25 mL). The combined organic phases were then dried (Na2SO4), filtered, concentrated under vacuum, and the residue was purified on a silica gel column (eluant hexane/EtOAc, 50/50 to 100) to give 510 mg (70%) of 9-(4-chloro-benzenesulfonyl)-3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one as a white solid; Retention time (min)=1.687 min, Method [1], MS (ESI) 316.1 (M+H); 1H-NMR (300 MHz, CDCl3) δ 7.84-7.81 (m, 2H), 7.56-7.51 (m, 2H), 4.28-4.27 (m, 2H), 3.76 (d, J=12.1 Hz, 2H), 3.61 (d, J=11.5 Hz, 2H), 2.65 (dd, J=15.93, 5.49 Hz, 2H), 2.46 (d, J=15.93 Hz, 2H); 13C-NMR (75 MHz, CDCl3) δ 204.3, 140.1, 139.1, 130.1, 128.7, 71.7, 51.7, 44.4 ppm. washed with a saturated aqueous NaHCO3 solution (15 mL) The aqueous phase was separated extracted twice with EtOAc (2×25 mL) The combined organic phases were then dried (Na2SO4) filtered concentrated under vacuum the residue was purified on a silica gel column (eluant hexane/EtOAc, 50/50 to 100)

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

Procedure: To a stirring mixture of 3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one (408 mg, 2.3 mmol) in dichloromethane (8 mL) was added Et3N (1.2 mL, 9.2 mmol) and 4-chlorobenzenesulfonyl chloride (582 mg, 2.76 mmol). The reaction mixture was stirred at room temperature for 2 h. The reaction mixture was diluted with dichloromethane (50 mL) and washed with a saturated aqueous NaHCO3 solution (15 mL). The aqueous phase was separated and extracted twice with EtOAc (2×25 mL). The combined organic phases were then dried (Na2SO4), filtered, concentrated under vacuum, and the residue was purified on a silica gel column (eluant hexane/EtOAc, 50/50 to 100) to give 510 mg (70%) of 9-(4-chloro-benzenesulfonyl)-3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one as a white solid; Retention time (min)=1.687 min, Method [1], MS (ESI) 316.1 (M+H); 1H-NMR (300 MHz, CDCl3) δ 7.84-7.81 (m, 2H), 7.56-7.51 (m, 2H), 4.28-4.27 (m, 2H), 3.76 (d, J=12.1 Hz, 2H), 3.61 (d, J=11.5 Hz, 2H), 2.65 (dd, J=15.93, 5.49 Hz, 2H), 2.46 (d, J=15.93 Hz, 2H); 13C-NMR (75 MHz, CDCl3) δ 204.3, 140.1, 139.1, 130.1, 128.7, 71.7, 51.7, 44.4 ppm. washed with a saturated aqueous NaHCO3 solution (15 mL) The aqueous phase was separated extracted twice with EtOAc (2×25 mL) The combined organic phases were then dried (Na2SO4) filtered concentrated under vacuum the residue was purified on a silica gel column (eluant hexane/EtOAc, 50/50 to 100)

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

Procedure: To a stirring mixture of 9-benzyl-3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one (1.1 g, 4.76 mmol) in EtOAc/HOAc (6 mL, 1:1, v/v) was added palladium on carbon (250 mg). The resulting mixture was stirred at room temperature under an atmosphere of hydrogen for 2 days. The suspension was filtered through Celite and the filtrate was concentrated under vacuum to give a quantitative yield of 3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one as a yellow oil. This crude mixture was converted to the corresponding hydrochloric salt by the addition of HCl (3 mL, 1N aqueous HCl). The mixture was concentrated under reduced pressure and this process was repeated twice. Retention time (min)=0.231, Method [1], MS (ESI) 142.2 (M+H). The suspension was filtered through Celite the filtrate was concentrated under vacuum

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

Procedure: To a stirring mixture of 3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one (408 mg, 2.3 mmol) in dichloromethane (8 mL) was added Et3N (1.2 mL, 9.2 mmol) and 4-chlorobenzenesulfonyl chloride (582 mg, 2.76 mmol). The reaction mixture was stirred at room temperature for 2 h. The reaction mixture was diluted with dichloromethane (50 mL) and washed with a saturated aqueous NaHCO3 solution (15 mL). The aqueous phase was separated and extracted twice with EtOAc (2×25 mL). The combined organic phases were then dried (Na2SO4), filtered, concentrated under vacuum, and the residue was purified on a silica gel column (eluant hexane/EtOAc, 50/50 to 100) to give 510 mg (70%) of 9-(4-chloro-benzenesulfonyl)-3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one as a white solid; Retention time (min)=1.687 min, Method [1], MS (ESI) 316.1 (M+H); 1H-NMR (300 MHz, CDCl3) δ 7.84-7.81 (m, 2H), 7.56-7.51 (m, 2H), 4.28-4.27 (m, 2H), 3.76 (d, J=12.1 Hz, 2H), 3.61 (d, J=11.5 Hz, 2H), 2.65 (dd, J=15.93, 5.49 Hz, 2H), 2.46 (d, J=15.93 Hz, 2H); 13C-NMR (75 MHz, CDCl3) δ 204.3, 140.1, 139.1, 130.1, 128.7, 71.7, 51.7, 44.4 ppm. washed with a saturated aqueous NaHCO3 solution (15 mL) The aqueous phase was separated extracted twice with EtOAc (2×25 mL) The combined organic phases were then dried (Na2SO4) filtered concentrated under vacuum the residue was purified on a silica gel column (eluant hexane/EtOAc, 50/50 to 100)

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

Procedure: To a stirring mixture of 3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one (408 mg, 2.3 mmol) in dichloromethane (8 mL) was added Et3N (1.2 mL, 9.2 mmol) and 4-chlorobenzenesulfonyl chloride (582 mg, 2.76 mmol). The reaction mixture was stirred at room temperature for 2 h. The reaction mixture was diluted with dichloromethane (50 mL) and washed with a saturated aqueous NaHCO3 solution (15 mL). The aqueous phase was separated and extracted twice with EtOAc (2×25 mL). The combined organic phases were then dried (Na2SO4), filtered, concentrated under vacuum, and the residue was purified on a silica gel column (eluant hexane/EtOAc, 50/50 to 100) to give 510 mg (70%) of 9-(4-chloro-benzenesulfonyl)-3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one as a white solid; Retention time (min)=1.687 min, Method [1], MS(ESI) 316.1 (M+H); 1H-NMR (300 MHz, CDCl3) δ 7.84-7.81 (m, 2H), 7.56-7.51 (m, 2H), 4.28-4.27 (m, 2H), 3.76 (d, J=12.1 Hz, 2H), 3.61 (d, J=11.5 Hz, 2H), 2.65 (dd, J=15.93, 5.49 Hz, 2H), 2.46 (d, J=15.93 Hz, 2H); 13C-NMR (75 MHz, CDCl3) δ 204.3, 140.1, 139.1, 130.1, 128.7, 71.7, 51.7, 44.4 ppm. washed with a saturated aqueous NaHCO3 solution (15 mL) The aqueous phase was separated extracted twice with EtOAc (2×25 mL) The combined organic phases were then dried (Na2SO4) filtered concentrated under vacuum the residue was purified on a silica gel column (eluant hexane/EtOAc, 50/50 to 100)

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

Procedure: To a stirring mixture of 9-benzyl-3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one (1.1 g, 4.76 mmol) in EtOAc/HOAc (6 mL, 1:1, v/v) was added palladium on carbon (250 mg). The resulting mixture was stirred at room temperature under an atmosphere of hydrogen for 2 days. The suspension was filtered through Celite and the filtrate was concentrated under vacuum to give a quantitative yield of 3-oxa-9-aza-bicyclo[3.3.1]nonan-7-one as a yellow oil. This crude mixture was converted to the corresponding hydrochloric salt by the addition of HCl (3 mL, 1N aqueous HCl). The mixture was concentrated under reduced pressure and this process was repeated twice. Retention time (min)=0.231, Method [1], MS(ESI) 142.2 (M+H). The suspension was filtered through Celite the filtrate was concentrated under vacuum

Conditions: temp:0.00; pressure:0.00; stir: