2,2,2-trifluoro-1-(2-methylphenyl)ethanone

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: 3.7 g (0.020 mol) of 2,2,2-trifluoro-1-(2-methylphenyl)-ethanone are dissolved in 20 ml of ethanol at 80° C. To the solution are added dropwise 1.4 g (0.020 mol) of hydroxylammonium chloride and 2.7 g (0.033 mol) of sodium acetate dissolved in 10 ml of water. The reaction mixture is refluxed for 5 hours, poured into ice water, and extracted with ethyl acetate. The organic phase is washed with water and brine, dried over MgSO4, and concentrated, yielding 2.7 g of 2,2,2-trifluoro-1-(2-methylphenyl)-ethanone oxime as a white solid. The crude product is used in the next reaction step without further purification. The reaction mixture is refluxed for 5 hours extracted with ethyl acetate The organic phase is washed with water and brine dried over MgSO4 concentrated

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

Procedure: A Grignard reagent is prepared from 25.0 g (0.146 mol) of 2-bromotoluene and 4.3 g (0.175 mol) of magnesium in 100 ml of diethyl ether. The Grignard reagent is added dropwise to a solution of 22.8 g (0.161 mol) ethyl trifluoroacetate in 120 ml of diethyl ether at −78° C. The reaction mixture is allowed to warm to room temperature and stirred for one additional hour. 300 ml of NH4Cl aq and 100 ml of 1N HCl are then added to the mixture. The aqueous phase is removed, the organic phase is washed with NH4Cl aq and brine, dried over MgSO4, and concentrated. The residue is purified by flash chromatography on silica gel with hexane as an eluent, yielding 6.3 g of 2,2,2-trifluoro-1-(2-methylphenyl)-ethanone as colorless liquid. The aqueous phase is removed the organic phase is washed with NH4Cl aq and brine dried over MgSO4 concentrated The residue is purified by flash chromatography on silica gel with hexane as an eluent

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

Procedure: 3.7 g (0.020 mol) of 2,2,2-trifluoro-1-(2-methylphenyl)-ethanone are dissolved in 20 ml of ethanol at 80° C. To the solution are added dropwise 1.4 g (0.020 mol) of hydroxylammonium chloride and 2.7 g (0.033 mol) of sodium acetate dissolved in 10 ml of water. The reaction mixture is refluxed for 5 hours, poured into ice water, and extracted with ethyl acetate. The organic phase is washed with water and brine, dried over MgSO4, and concentrated, yielding 2.7 g of 2,2,2-trifluoro-1-(2-methylphenyl)-ethanone oxime as a white solid. The crude product is used in the next reaction step without further purification. The reaction mixture is refluxed for 5 hours extracted with ethyl acetate The organic phase is washed with water and brine dried over MgSO4 concentrated

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

Procedure: A Grignard reagent is prepared from 25.0 g (0.146 mol) of 2-bromotoluene and 4.3 g (0.175 mol) of magnesium in 100 ml of diethyl ether. The Grignard reagent is added dropwise to a solution of 22.8 g (0.161 mol) ethyl trifluoroacetate in 120 ml of diethyl ether at −78° C. The reaction mixture is allowed to warm to room temperature and stirred for one additional hour. 300 ml of NH4Cl aq and 100 ml of 1N HCl are then added to the mixture. The aqueous phase is removed, the organic phase is washed with NH4Cl aq and brine, dried over MgSO4, and concentrated. The residue is purified by flash chromatography on silica gel with hexane as an eluent, yielding 6.3 g of 2,2,2-trifluoro-1-(2-methylphenyl)-ethanone as colorless liquid. The aqueous phase is removed the organic phase is washed with NH4Cl aq and brine dried over MgSO4 concentrated The residue is purified by flash chromatography on silica gel with hexane as an eluent

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