diethoxyphosphorylmethylbenzene

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:

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 −78° C. solution of diethyl benzylphoshonate (91 mg, 0.4 mmol) in THF (5 mL) was added a 2 M solution of LDA and THF (0.2 mL, 0.4 mmol), and the solution was warmed to RT over 20 min. A solution of 1-benzyl-2-isopropyl-5-(tetrahydropyran-2-yloxy)-1H-indole-3-carboxaldehyde (Compound 13, 100 mg, 0.27 mmol) and THF (2 mL) was added, and the solution was stirred for 1 h at ambient temperature. The solution was diluted with EtOAc (50 mL), and washed with brine (10 mL), and dried (Na2SO4), and the solvent was removed under vacuum. Silica gel flash chromatography using 20% EtOAc in hexane gave (E)-1-benzyl-2-isopropyl-3-(2-phenylethen-1-yl)-5-(tetrahydropyran-2-yloxy)-1H-indole (Compound 26) as a colorless oil. washed with brine (10 mL) dried (Na2SO4) the solvent was removed under vacuum

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

Procedure: Benzylphosphonic acid was prepared as follows. 200.40 g (878 mmoles) of diethyl benzylphosphonate was combined with 350 ml of distilled water and 350 ml of concentrated (~12 molar) hydrochloric acid. The resulting suspension was heated to reflux under nitrogen for 20 hours, whereupon a clear colorless solution was obtained. From this solution, 130 ml of aqueous distillate was removed. The residue was allowed to cool, forming a thick white slurry which was cooled in situ with an ice bath. The slurry was then filtered dry under vacuum, but not washed due to its fairly high solubility in water. The wet solid was then dried in a vacuum at 120° C. overnight. 123.37 g (82% yield) was obtained. of concentrated (~12 molar) hydrochloric acid The resulting suspension was heated to reflux under nitrogen for 20 hours, whereupon a clear colorless solution was obtained From this solution, 130 ml of aqueous distillate was removed to cool forming a thick white slurry which was cooled in situ with an ice bath The slurry was then filtered dry under vacuum not washed due to its fairly high solubility in water The wet solid was then dried in a vacuum at 120° C. overnight 123.37 g (82% yield) was obtained

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

Procedure: A solution of diethyl benzylphosphonate in 30 ml of dimethylformamide is added at room temperature to a suspension of 3.7 g of NaH (50% in mineral oil) in 50 ml of dimethylformamide. After stirring at room temperature for 15 minutes a solution of 12.6 g of 7-acetyl-1,1,4,4,6-pentamethyltetralin in 60 ml of dimethylformamide is added dropwise thereto in the course of 2 hours. The reaction mixture is stirred at room temperature overnight and subsequently heated to 60° for a further 1 hour. After cooling the mixture is poured on to ice, extracted with ether, dried and evaporated. After chromatography of the crude product (silica gel, elution agent hexane) and crystallization from hexane there are obtained 3.9 g of 1,2,3,4-tetrahydro-1,1,4,4,7-pentamethyl-6-[(E)-α-methylstyryl]naphthalene in colourless crystals, melting point 75°-77°. is added dropwise in the course of 2 hours subsequently heated to 60° for a further 1 hour After cooling the mixture is poured on to ice extracted with ether dried evaporated After chromatography of the crude product (silica gel, elution agent hexane) and crystallization from hexane

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

Procedure: A solution containing 164 mg of 5-(3,5-dichloro-phenylsulphanyl)-3-methyl-1-phenyl-1H-pyrazole-4-carbaldehyde, 103 mg of diethyl benzylphosphonate and 27 mg of sodium hydride (60% in mineral oil) in 5 ml of anhydrous tetrahydrofuran was stirred under nitrogen at rt for 16 h. The solvent was evaporated and the residue was purified by flash chromatography on silica gel using ethyl acetate/petroleum spirit 40°–60° C. (1:10) for the elution to give 162 mg of 5-(3,5-dichlorophenylthio)-3-methyl-1-phenyl-4-styryl-1H-pyrazole as a pale yellow solid. Mass spectrum (EI) m/z 436 [M]+. The solvent was evaporated the residue was purified by flash chromatography on silica gel ethyl acetate/petroleum spirit 40°–60° C. (1:10) for the elution

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

Procedure: A solution of diethyl benzylphosphonate in 30 ml of dimethylformamide is added at room temperature to a suspension of 3.7 g of NaH (50% in mineral oil) in 50 ml of dimethylformamide. After stirring at room temperature for 15 minutes a solution of 12.6 g of 7-acetyl-1,1,4,4,6-pentamethyltetralin in 60 ml of dimethylformamide is added dropwise thereto in the course of 2 hours. The reaction mixture is stirred at room temperature overnight and subsequently heated to 60° for a further 1 hour. After cooling the mixture is poured on to ice, extracted with ether, dried and evaporated. After chromatography of the crude product (silica gel, elution agent hexane) and crystallization from hexane there are obtained 3.9 g of 1,2,3,4-tetrahydro-1,1,4,4,7-pentamethyl-6-[(E)-αmethylstyryl]naphthalene in colourless crystals, melting point 75°-77°. is added dropwise in the course of 2 hours subsequently heated to 60° for a further 1 hour After cooling the mixture is poured on to ice extracted with ether dried evaporated After chromatography of the crude product (silica gel, elution agent hexane) and crystallization from hexane

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

Procedure: Diethyl benzylphosphonate (5.0 mL, 5.5 g, 24 mmol) was dissolved in absolute EtOH (25 mL), then 50% NaOH (3 mL) was added. The reaction was heated under reflux overnight, allowed to cool to RT, then partitioned between 2N HCl and EtOAc. Washed organic layer with brine, extracted combined aqueous layers with EtOAc, dried combined organic layers over Na2SO4. After filtration and concentration recovered 4.5 g (93%). MS (DCI/NH3) 201/218 (M+H)+/(M+H+NH3)+. The reaction was heated under reflux overnight partitioned between 2N HCl and EtOAc Washed organic layer with brine, extracted dried After filtration and concentration recovered 4.5 g (93%)