氧化二苯基(2,2,2-三氟乙基)膦

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A 25 ml portion of THF solution containing 7.8 g of tetrabutylammonium fluoride and 24 g of Molecular Sieve 4A was stirred at room temperature for 12 hours in an atmosphere of argon. After cooling to 0° C., 20 ml of THF solution containing 300 mg of 3-[2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-3-(3-fluorophenyl)-3-oxopropanoyl]benzaldehyde and 1.7 g of diphenyl(2,2,2-trifluoroethyl)phosphine oxide was added dropwise thereto. This was stirred at room temperature for 5 hours. The reaction mixture was filtered, the filtrate was washed with water, dried with anhydrous sodium sulfate and concentrated, and then the thus formed residue was purified by a silica gel column chromatography to obtain 201 mg (57%) of 2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-1-(3-fluorophenyl)-3-{3-[(1Z)-3,3,3-trifluoroprop-1-en-1-yl]phenyl}propane-1,3-dione as a yellow powder from an ethyl acetate-hexane (1:3) eluate. FA: 463 After cooling to 0° C. was added dropwise This was stirred at room temperature for 5 hours The reaction mixture was filtered the filtrate was washed with water dried with anhydrous sodium sulfate concentrated the thus formed residue was purified by a silica gel column chromatography

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A 25 ml portion of THF solution containing 7.8 g of tetrabutylammonium fluoride and 24 g of Molecular Sieve 4A was stirred at room temperature for 12 hours in an atmosphere of argon. After cooling to 0° C., 20 ml of THF solution containing 300 mg of 3-[2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-3-(3-fluorophenyl)-3-oxopropanoyl]benzaldehyde and 1.7 g of diphenyl(2,2,2-trifluoroethyl)phosphine oxide was added dropwise thereto. This was stirred at room temperature for 5 hours. The reaction mixture was filtered, the filtrate was washed with water, dried with anhydrous sodium sulfate and concentrated, and then the thus formed residue was purified by a silica gel column chromatography to obtain 201 mg (57%) of 2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-1-(3-fluorophenyl)-3-{3-[(1Z)-3,3,3-trifluoroprop-1-en-1-yl]phenyl}propane-1,3-dione as a yellow powder from an ethyl acetate-hexane (1:3) eluate. FA: 463 After cooling to 0° C. was added dropwise This was stirred at room temperature for 5 hours The reaction mixture was filtered the filtrate was washed with water dried with anhydrous sodium sulfate concentrated the thus formed residue was purified by a silica gel column chromatography

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Ethyl diphenylphosphinite (b1; 20.0 g) and 1,1,1-trifluoro-2-iodoethane (b2; 36.5 g) were put into a reaction vessel under an argon atmosphere, and stirred at room temperature for 4 days. The resulting mixture was purified by means of fraction-collecting column chromatography using ethyl acetate as the eluent and silica gel as the stationary phase powder, and further purified by recrystallization from a mixed solvent of toluene and heptane (volume ratio of toluene:heptane=1:1), and then dried, whereby 12.6 g of 2,2,2-trifluoroethyl diphenylphosphine oxide (b3) was obtained. The yield based on the compound (b1) was 51.2%. The resulting mixture was purified by means of fraction-collecting column chromatography further purified by recrystallization from a mixed solvent of toluene and heptane (volume ratio of toluene:heptane=1:1) dried

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A 25 ml portion of THF solution containing 7.8 g of tetrabutylammonium fluoride and 24 g of Molecular Sieve 4A was stirred at room temperature for 12 hours in an atmosphere of argon. After cooling to 0° C., 20 ml of THF solution containing 300 mg of 3-[2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-3-(3-fluorophenyl)-3-oxopropanoyl]benzaldehyde and 1.7 g of diphenyl(2,2,2-trifluoroethyl)phosphine oxide was added dropwise thereto. This was stirred at room temperature for 5 hours. The reaction mixture was filtered, the filtrate was washed with water, dried with anhydrous sodium sulfate and concentrated, and then the thus formed residue was purified by a silica gel column chromatography to obtain 201 mg (57%) of 2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-1-(3-fluorophenyl)-3-{3-[(1Z)-3,3,3-trifluoroprop-1-en-1-yl]phenyl}propane-1,3-dione as a yellow powder from an ethyl acetate-hexane (1:3) eluate. FA: 463 After cooling to 0° C. was added dropwise This was stirred at room temperature for 5 hours The reaction mixture was filtered the filtrate was washed with water dried with anhydrous sodium sulfate concentrated the thus formed residue was purified by a silica gel column chromatography

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 4A Molecular sieves (7 g; activated powder) was suspended in 8.8 ml of 1.0M TBAF in THF and stirred overnight at room temperature under nitrogen. To the solution was added methyl 4-formylbenzoate (160 mg; 0.97 mmol) and 2,2,2-trifluoroethyldiphenylphosphine oxide (415 mg; 1.46 mmol) in 10 ml of anhydrous THF. After stirring overnight, the solvents were evaporated to dryness. The residue was dissolved in EtOAc and washed with water and brine. The organic dried over Na2SO4, filtered and evaporated. The residue was dissolved in 10 ml of THF and 10 ml of 1N NaOH and refluxed for 30 minutes. The mixture was acidified with concentrated HCl and extracted three times with EtOAc. The organic layers were washed with brine and dried over Na2SO4, filtered and evaporated to give the desired product as a brown powder (125 mg; 60%). After stirring overnight the solvents were evaporated to dryness The residue was dissolved in EtOAc washed with water and brine The organic dried over Na2SO4 filtered evaporated The residue was dissolved in 10 ml of THF 10 ml of 1N NaOH and refluxed for 30 minutes extracted three times with EtOAc The organic layers were washed with brine dried over Na2SO4 filtered evaporated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of ethyl diphenylphosphonite (1.98 g; 5.8 mmol) and 2,2,2-trifluoroethyl iodide (6.1 g; 29 mmol) was stirred at room temperature under nitrogen for 24 hrs. The excess reagents were removed under vacuum. The residue was purified on silica gel using a 0-100% hexane-ethyl acetate gradient to give the target as a white powder (800 mg; 49%). The excess reagents were removed under vacuum The residue was purified on silica gel using a 0-100% hexane-ethyl acetate gradient to give the target as a white powder (800 mg; 49%)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 4 Å molecular sieves (powder, 16 g) was added to a 1 M solution of TBAF in THF (20 mL, 20 mmol), and the mixture was stirred at room-temperature overnight under an argon atmosphere. To the mixture were added a solution of methyl 2-chloro-4-formylbenzoate (210 mg, 0.0010 mol) and 2,2,2-trifluoroethyldiphenylphosphine oxide (600 mg, 0.0021 mol) in THF (15 mL). After the mixture was stirred for 2 h, the molecular sieves were removed by filtration. The filtrate was concentrated and water (120 mL) was added. The mixture was extracted with AcOEt. The organic extract was washed with brine, dried (Na2SO4), and concentrated. The residue was chromatographed on silica gel with AcOEt [1% HOAc]-hexane to give the product as a white solid. LC-MS: t=3.12 min, m/z=248.9 & 250.9 (M−1). After the mixture was stirred for 2 h the molecular sieves were removed by filtration The filtrate was concentrated water (120 mL) was added The mixture was extracted with AcOEt The organic extract was washed with brine dried (Na2SO4) concentrated The residue was chromatographed on silica gel with AcOEt [1% HOAc]-hexane

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Molecular sieves 4 Å (powder, 24 g) was added to a 1 M solution of TBAF in THF (30 mL, 30 mmol), and the mixture was stirred at room-temperature overnight under an argon atmosphere. To the mixture were added a solution of tert-butyl 2-fluoro-4-formylbenzoate (750 mg, 0.0033 mol) and 2,2,2-trifluoroethyldiphenylphosphine oxide (1.9 g, 0.0067 mol) in THF (30 mL). After the mixture was stirred for 2 h it was filtered. The filtrate was concentrated under vacuum and water (120 mL) was added. The mixture was extracted with AcOEt and the organic extract was washed with brine, dried (Na2SO4), and concentrated under vacuum. The residue was purified by column chromatography on silica gel using AcOEt-hexane (0-15%) as eluent to give (E)-tert-butyl 2-fluoro-4-(3,3,3-trifluoroprop-1-enyl)benzoate as a colorless oil (620 mg, 64%), followed by (Z)-tert-butyl 2-fluoro-4-(3,3,3-trifluoroprop-1-enyl)benzoate as a colorless oil (80 mg, 8%). After the mixture was stirred for 2 h it was filtered The filtrate was concentrated under vacuum and water (120 mL) was added The mixture was extracted with AcOEt the organic extract was washed with brine dried (Na2SO4) concentrated under vacuum The residue was purified by column chromatography on silica gel

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: MS 4 Å (powder, 16 g) was added to a 1 M solution of TBAF in THF (20 mL, 20 mmol), and the mixture was stirred at room-temperature overnight under an argon atmosphere. To the mixture were added a solution of methyl 4-formyl-2-methoxybenzoate (420 mg, 0.0022 mol) and 2,2,2-trifluoroethyldiphenylphosphine oxide (1.23 g, 0.00432 mol) in THF (20 mL). After the mixture was stirred for 2 h, MS 4 Å was removed by filtration. The filtrate was concentrated and water (120 mL) was added. The mixture was extracted with AcOEt. The extract was washed with brine, dried (Na2SO4), and concentrated. The residue was purified by column chromatography on silica gel using AcOEt-hexane (0-15%) as eluent to give (E)-methyl 4-(3,3,3-trifluoroprop-1-enyl)-2-methoxybenzoate as a white solid, followed by (Z)-methyl 4-(3,3,3-trifluoroprop-1-enyl)-2-methoxybenzoate as a colorless oil. After the mixture was stirred for 2 h MS 4 Å was removed by filtration The filtrate was concentrated water (120 mL) was added The mixture was extracted with AcOEt The extract was washed with brine dried (Na2SO4) concentrated The residue was purified by column chromatography on silica gel

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 4 Å molecular sieves (7 g; activated powder) were suspended in 8.8 ml of 1.0 m tbaf in thf and stirred overnight at room temperature under nitrogen. To the solution was added methyl 4-formylbenzoate (160 mg; 0.97 mmol) and 2,2,2-trifluoroethyldiphenylphosphine oxide (415 mg; 1.46 mmol) in 10 ml of anhydrous thf. After stirring overnight, the solvents were evaporated to dryness. The residue was dissolved in EtOAc and washed with water and brine. The organic was dried over Na2SO4, filtered and evaporated. The residue was dissolved in 10 ml of thf and 10 ml of 1N NaOH and refluxed for 30 minutes. The mixture was acidified with concentrated HCl and extracted three times with EtOAc. The organic layers were washed with brine and dried over Na2SO4, filtered and evaporated to give the desired product as a brown powder (125 mg; 60%). M/z=217 (m+1). After stirring overnight the solvents were evaporated to dryness The residue was dissolved in EtOAc washed with water and brine The organic was dried over Na2SO4 filtered evaporated The residue was dissolved in 10 ml of thf and 10 ml of 1N NaOH refluxed for 30 minutes extracted three times with EtOAc The organic layers were washed with brine dried over Na2SO4 filtered evaporated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A 25 ml portion of THF solution containing 7.8 g of tetrabutylammonium fluoride and 24 g of Molecular Sieve 4A was stirred at room temperature for 12 hours in an atmosphere of argon. After cooling to 0° C., 20 ml of THF solution containing 300 mg of 3-[2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-3-(3-fluorophenyl)-3-oxopropanoyl]benzaldehyde and 1.7 g of diphenyl(2,2,2-trifluoroethyl)phosphine oxide was added dropwise thereto. This was stirred at room temperature for 5 hours. The reaction mixture was filtered, the filtrate was washed with water, dried with anhydrous sodium sulfate and concentrated, and then the thus formed residue was purified by a silica gel column chromatography to obtain 201 mg (57%) of 2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-1-(3-fluorophenyl)-3-{3-[(1Z)-3,3,3-trifluoroprop-1-en-1-yl]phenyl}propane-1,3-dione as a yellow powder from an ethyl acetate-hexane (1:3) eluate. FA: 463 After cooling to 0° C. was added dropwise This was stirred at room temperature for 5 hours The reaction mixture was filtered the filtrate was washed with water dried with anhydrous sodium sulfate concentrated the thus formed residue was purified by a silica gel column chromatography