tert-butyl N-(triphenyl-lambda5-phosphanylidene)carbamate

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 20.0 g (53.0 mol) of triphenyl(t-butoxycarbonylimino)phosphorane was suspended in 80 mL of toluene, mixed with 8.84 g (60.0 mmol) of anhydrous chloral and heated at 120° C. for 4 hours under reflux. After cooling to room temperature, 300 mL of hexane was added, and the resulting white solid was separated by filtration. The filtrate was concentrated under reduced pressure. The resulting brown liquid was dissolved in 200 mL of chloroform, and simultaneous addition of 3.74 g (50.0 mmol) of potassium carbonate in 20 mL of ice-cold water and 4.94 g (15 mmol) of OXONE (2 KHSC5.KHSC4.K2SC4, supplied from Du Pont) in 40 mL of ice-cold water and 1 hour of stirring under cooling with ice were repeated three times. After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE (2 KHSC5.KHSC4.K2SC4, supplied from Du Pont) and 1 hour of stirring under cooling with ice were repeated three times, similarly. After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE and 1 hour of stirring under cooling with ice were repeated three times, similarly. After removal of the aqueous layer, 11.2 g (150 mmol) of potassium carbonate in 60 mL of ice-cold water and 14.8 g (45 mmol) of OXONE in 120 mL of ice-cold water were added simultaneously, and the reaction solution was stirred for 1 hour of stirring under cooling with ice. After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added, the reaction solution was stirred for 1 hour of stirring under cooling with ice, similarly. After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added, the reaction solution was stirred for 1 hour of stirring under cooling with ice, similarly. After removal of the aqueous layer, the chloroform layer was dried over anhydrous sodium sulfate and filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography using hexane-ethyl acetate {100:0 (volume ratio, hereinafter the same applies) to 80:20} as the eluent to give 10.3 g of the desired product as a pale yellow oil. under reflux After cooling to room temperature the resulting white solid was separated by filtration The filtrate was concentrated under reduced pressure The resulting brown liquid was dissolved in 200 mL of chloroform under cooling with ice After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE (2 KHSC5.KHSC4.K2SC4, supplied from Du Pont) and 1 hour of stirring under cooling with ice After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE and 1 hour of stirring under cooling with ice were added simultaneously the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer the chloroform layer was dried over anhydrous sodium sulfate filtered the filtrate was concentrated under reduced pressure The resulting residue was purified by silica gel column chromatography

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 20.0 g (53.0 mol) of triphenyl(t-butoxycarbonylimino)phosphorane was suspended in 80 mL of toluene, mixed with 8.84 g (60.0 mmol) of anhydrous chloral and heated at 120° C. for 4 hours under reflux. After cooling to room temperature, 300 mL of hexane was added, and the resulting white solid was separated by filtration. The filtrate was concentrated under reduced pressure. The resulting brown liquid was dissolved in 200 mL of chloroform, and simultaneous addition of 3.74 g (50.0 mmol) of potassium carbonate in 20 mL of ice-cold water and 4.94 g (15 mmol) of OXONE (2 KHSC5.KHSC4.K2SC4, supplied from Du Pont) in 40 mL of ice-cold water and 1 hour of stirring under cooling with ice were repeated three times. After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE (2 KHSC5.KHSC4.K2SC4, supplied from Du Pont) and 1 hour of stirring under cooling with ice were repeated three times, similarly. After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE and 1 hour of stirring under cooling with ice were repeated three times, similarly. After removal of the aqueous layer, 11.2 g (150 mmol) of potassium carbonate in 60 mL of ice-cold water and 14.8 g (45 mmol) of OXONE in 120 mL of ice-cold water were added simultaneously, and the reaction solution was stirred for 1 hour of stirring under cooling with ice. After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added, the reaction solution was stirred for 1 hour of stirring under cooling with ice, similarly. After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added, the reaction solution was stirred for 1 hour of stirring under cooling with ice, similarly. After removal of the aqueous layer, the chloroform layer was dried over anhydrous sodium sulfate and filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography using hexane-ethyl acetate {100:0 (volume ratio, hereinafter the same applies) to 80:20} as the eluent to give 10.3 g of the desired product as a pale yellow oil. under reflux After cooling to room temperature the resulting white solid was separated by filtration The filtrate was concentrated under reduced pressure The resulting brown liquid was dissolved in 200 mL of chloroform under cooling with ice After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE (2 KHSC5.KHSC4.K2SC4, supplied from Du Pont) and 1 hour of stirring under cooling with ice After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE and 1 hour of stirring under cooling with ice were added simultaneously the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer the chloroform layer was dried over anhydrous sodium sulfate filtered the filtrate was concentrated under reduced pressure The resulting residue was purified by silica gel column chromatography

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

Procedure: To the solution of t-butyl carbonazidate in diethyl ether, 49.6 g (0.189 mol) of triphenylphosphine was added in small portions under cooling with ice, and the reaction solution was stirred at room temperature for 1 hour, and the precipitated solid was collected by filtration, washed with 200 mL of hexane and dried under reduced pressure to give 67 g of the desired product as white crystals. under cooling with ice the precipitated solid was collected by filtration washed with 200 mL of hexane dried under reduced pressure

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

Procedure: To the solution of t-butyl carbonazidate in diethyl ether, 49.6 g (0.189 mol) of triphenylphosphine was added in small portions under cooling with ice, and the reaction solution was stirred at room temperature for 1 hour, and the precipitated solid was collected by filtration, washed with 200 mL of hexane and dried under reduced pressure to give 67 g of the desired product as white crystals. under cooling with ice the precipitated solid was collected by filtration washed with 200 mL of hexane dried under reduced pressure

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 20.0 g (53.0 mol) of triphenyl(t-butoxycarbonylimino)phosphorane was suspended in 80 mL of toluene, mixed with 8.84 g (60.0 mmol) of anhydrous chloral and heated at 120° C. for 4 hours under reflux. After cooling to room temperature, 300 mL of hexane was added, and the resulting white solid was separated by filtration. The filtrate was concentrated under reduced pressure. The resulting brown liquid was dissolved in 200 mL of chloroform, and simultaneous addition of 3.74 g (50.0 mmol) of potassium carbonate in 20 mL of ice-cold water and 4.94 g (15 mmol) of OXONE (2 KHSC5.KHSC4.K2SC4, supplied from Du Pont) in 40 mL of ice-cold water and 1 hour of stirring under cooling with ice were repeated three times. After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE (2 KHSC5.KHSC4.K2SC4, supplied from Du Pont) and 1 hour of stirring under cooling with ice were repeated three times, similarly. After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE and 1 hour of stirring under cooling with ice were repeated three times, similarly. After removal of the aqueous layer, 11.2 g (150 mmol) of potassium carbonate in 60 mL of ice-cold water and 14.8 g (45 mmol) of OXONE in 120 mL of ice-cold water were added simultaneously, and the reaction solution was stirred for 1 hour of stirring under cooling with ice. After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added, the reaction solution was stirred for 1 hour of stirring under cooling with ice, similarly. After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added, the reaction solution was stirred for 1 hour of stirring under cooling with ice, similarly. After removal of the aqueous layer, the chloroform layer was dried over anhydrous sodium sulfate and filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography using hexane-ethyl acetate {100:0 (volume ratio, hereinafter the same applies) to 80:20} as the eluent to give 10.3 g of the desired product as a pale yellow oil. under reflux After cooling to room temperature the resulting white solid was separated by filtration The filtrate was concentrated under reduced pressure The resulting brown liquid was dissolved in 200 mL of chloroform under cooling with ice After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE (2 KHSC5.KHSC4.K2SC4, supplied from Du Pont) and 1 hour of stirring under cooling with ice After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE and 1 hour of stirring under cooling with ice were added simultaneously the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer the chloroform layer was dried over anhydrous sodium sulfate filtered the filtrate was concentrated under reduced pressure The resulting residue was purified by silica gel column chromatography

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

Procedure: To the solution of t-butyl carbonazidate in diethyl ether, 49.6 g (0.189 mol) of triphenylphosphine was added in small portions under cooling with ice, and the reaction solution was stirred at room temperature for 1 hour, and the precipitated solid was collected by filtration, washed with 200 mL of hexane and dried under reduced pressure to give 67 g of the desired product as white crystals. under cooling with ice the precipitated solid was collected by filtration washed with 200 mL of hexane dried under reduced pressure

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suspension of 1-(5-bromo-2-fluoro-phenyl)-2,2-difluoro-ethanone (16.0 g, 63.2 mmol) and N-(triphenylphosphoranylidene)-carbamic acid 1,1-dimethylethyl ester (CAS 68014-21-1) (26.3 g, 69.6 mmol) in 12 ml toluene was stirred at 100° C. for 2 days. The suspension became clear. After being cooled down somewhat, hexane was added till crystallization of triphenylphosphine oxide started. The mixture was filtered and the filtrate was purified by chromatography on silica gel with hexane/TBME 1-5% to give 11.37 g of the title compound as a yellow liquid. After being cooled down somewhat The mixture was filtered the filtrate was purified by chromatography on silica gel with hexane/TBME 1-5%

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suspension of 1-(5-bromo-2-fluoro-phenyl)-2,2-difluoro-ethanone (16.0 g, 63.2 mmol) and N-(triphenylphosphoranylidene)-carbamic acid 1,1-dimethylethyl ester (CAS 68014-21-1) (26.3 g, 69.6 mmol) in 12 ml toluene was stirred at 100° C. for 2 days. The suspension became clear. After being cooled down somewhat, hexane was added till crystallization of triphenylphosphine oxide started. The mixture was filtered and the filtrate was purified by chromatography on silica gel with hexane/TBME 1-5% to give 11.37 g of the title compound as a yellow liquid. After being cooled down somewhat The mixture was filtered the filtrate was purified by chromatography on silica gel with hexane/TBME 1-5%

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suspension of 1-(5-bromo-2-fluoro-phenyl)-2,2-difluoro-ethanone (16.0 g, 63.2 mmol) and N-(triphenylphosphoranylidene)-carbamic acid 1,1-dimethylethyl ester (CAS 68014-21-1) (26.3 g, 69.6 mmol) in 12 ml toluene was stirred at 100° C. for 2 days. The suspension became clear. After being cooled down somewhat, hexane was added till crystallization of triphenylphosphine oxide started. The mixture was filtered and the filtrate was purified by chromatography on silica gel with hexane/TBME 1-5% to give 11.37 g of the title compound as a yellow liquid. After being cooled down somewhat The mixture was filtered the filtrate was purified by chromatography on silica gel with hexane/TBME 1-5%

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A suspension of 1-(5-bromo-2-fluoro-phenyl)-2,2-difluoro-ethanone (16.0 g, 63.2 mmol) and N-(triphenylphosphoranylidene)-carbamic acid 1,1-dimethylethyl ester (CAS 68014-21-1) (26.3 g, 69.6 mmol) in 12 ml toluene was stirred at 100° C. for 2 days. The suspension became clear. After being cooled down somewhat, hexane was added till crystallization of triphenylphosphine oxide started. The mixture was filtered and the filtrate was purified by chromatography on silica gel with hexane/TBME 1-5% to give 11.37 g of the title compound as a yellow liquid. After being cooled down somewhat The mixture was filtered the filtrate was purified by chromatography on silica gel with hexane/TBME 1-5%

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 20.0 g (53.0 mol) of triphenyl(t-butoxycarbonylimino)phosphorane was suspended in 80 mL of toluene, mixed with 8.84 g (60.0 mmol) of anhydrous chloral and heated at 120° C. for 4 hours under reflux. After cooling to room temperature, 300 mL of hexane was added, and the resulting white solid was separated by filtration. The filtrate was concentrated under reduced pressure. The resulting brown liquid was dissolved in 200 mL of chloroform, and simultaneous addition of 3.74 g (50.0 mmol) of potassium carbonate in 20 mL of ice-cold water and 4.94 g (15 mmol) of OXONE (2KHSO5.KHSO4.K2SO4, supplied from Du Pont) in 40 mL of ice-cold water and 1 hour of stirring under cooling with ice were repeated three times. After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE (2KHSO5.KHSO4.K2SO4, supplied from Du Pont) and 1 hour of stirring under cooling with ice were repeated three times, similarly. After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE and 1 hour of stirring under cooling with ice were repeated three times, similarly. After removal of the aqueous layer, 11.2 g (150 mmol) of potassium carbonate in 60 mL of ice-cold water and 14.8 g (45 mmol) of OXONE in 120 mL of ice-cold water were added simultaneously, and the reaction solution was stirred for 1 hour of stirring under cooling with ice. After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added, the reaction solution was stirred for 1 hour of stirring under cooling with ice, similarly. After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added, the reaction solution was stirred for 1 hour of stirring under cooling with ice, similarly. After removal of the aqueous layer, the chloroform layer was dried over anhydrous sodium sulfate and filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography using hexane-ethyl acetate {100:0 (volume ratio, hereinafter the same applies) to 80:20} as the eluent to give 10.3 g of the desired product as a pale yellow oil. under reflux After cooling to room temperature the resulting white solid was separated by filtration The filtrate was concentrated under reduced pressure The resulting brown liquid was dissolved in 200 mL of chloroform under cooling with ice After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE (2KHSO5 1 hour of stirring under cooling with ice After removal of the aqueous layer, simultaneous addition of aqueous potassium carbonate and aqueous OXONE and 1 hour of stirring under cooling with ice were added simultaneously the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer, aqueous potassium carbonate and aqueous OXONE were simultaneously added the reaction solution was stirred for 1 hour of stirring under cooling with ice After removal of the aqueous layer the chloroform layer was dried over anhydrous sodium sulfate filtered the filtrate was concentrated under reduced pressure The resulting residue was purified by silica gel column chromatography

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

Procedure: To the solution of t-butyl carbonazidate in diethyl ether, 49.6 g (0.189 mol) of triphenylphosphine was added in small portions under cooling with ice, and the reaction solution was stirred at room temperature for 1 hour, and the precipitated solid was collected by filtration, washed with 200 mL of hexane and dried under reduced pressure to give 67 g of the desired product as white crystals. under cooling with ice the precipitated solid was collected by filtration washed with 200 mL of hexane dried under reduced pressure