1,1,1-trifluorohexane-2,4-dione

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

Procedure: The title compound was prepared by a similar method to that of Preparation 9 using 1,1,1-trifluorohexane-2,4-dione and 3,5-dichlorobenzaldehyde. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane gradually changing to pentane:ethyl acetate (5:1, by volume). The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford a mixture of the title compounds (500 mg) as a yellow oil. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford

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

Procedure: To a solution of 1,1,1-Trifluoro-hexane-2,4-dione (1 g, 5.95 mmol) in absolute ethanol (10 mL) was added NH2NH2.xH2O drop-wise at 0° C. The reaction mixture warmed to the room temperature during 1 hour and refluxed overnight. Ethanol was then evaporated, residue dissolved in ethyl acetate (20 mL), washed consecutively with saturated brine solution and water, dried with Na2SO4 and concentrated to give the title compound as colorless oil. at 0° C refluxed overnight Ethanol was then evaporated residue dissolved in ethyl acetate (20 mL) washed consecutively with saturated brine solution and water dried with Na2SO4 concentrated

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

Procedure: To a solution of 1,1,1-Trifluoro-hexane-2,4-dione (1 g, 5.95 mmol) in absolute ethanol (10 mL) was added NH2NH2.xH2O drop-wise at 0° C. The reaction mixture warmed to the room temperature during 1 hour and refluxed overnight. Ethanol was then evaporated, residue dissolved in ethyl acetate (20 mL), washed consecutively with saturated brine solution and water, dried with Na2SO4 and concentrated to give the title compound as colorless oil. at 0° C refluxed overnight Ethanol was then evaporated residue dissolved in ethyl acetate (20 mL) washed consecutively with saturated brine solution and water dried with Na2SO4 concentrated

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

Procedure: The title compound was prepared by a similar method to that of Preparation 9 using 1,1,1-trifluorohexane-2,4-dione and 3,5-dichlorobenzaldehyde. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane gradually changing to pentane:ethyl acetate (5:1, by volume). The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford a mixture of the title compounds (500 mg) as a yellow oil. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford

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

Procedure: The title compound was prepared by a similar method to that of Preparation 9 using 1,1,1-trifluorohexane-2,4-dione and 3,5-dichlorobenzaldehyde. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane gradually changing to pentane:ethyl acetate (5:1, by volume). The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford a mixture of the title compounds (500 mg) as a yellow oil. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford

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

Procedure: The title compound was prepared by a similar method to that of Preparation 9 using 1,1,1-trifluorohexane-2,4-dione and 3,5-dichlorobenzaldehyde. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane gradually changing to pentane:ethyl acetate (5:1, by volume). The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford a mixture of the title compounds (500 mg) as a yellow oil. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford

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

Procedure: To a solution of 1,1,1-Trifluoro-hexane-2,4-dione (1 g, 5.95 mmol) in absolute ethanol (10 mL) was added NH2NH2.xH2O drop-wise at 0° C. The reaction mixture warmed to the room temperature during 1 hour and refluxed overnight. Ethanol was then evaporated, residue dissolved in ethyl acetate (20 mL), washed consecutively with saturated brine solution and water, dried with Na2SO4 and concentrated to give the title compound as colorless oil. at 0° C refluxed overnight Ethanol was then evaporated residue dissolved in ethyl acetate (20 mL) washed consecutively with saturated brine solution and water dried with Na2SO4 concentrated

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

Procedure: A solution of 1,1,1-trifluoro-2,4-hexane-dione (2.4 g, 14.3 mmol), hydrazine hydrate (1.0 g, 19.0 mmol) and acetic acid (1 drop) in water (10 mL) was heated to reflux for 1 h. The reaction mixture was then cooled in an ice bath to form a white precipitate. The precipitate was then filtered, dissolved in chloroform and dried over MgSO4. The resulting solution was concentrated under reduced pressure to provide 1.39 g of the title compound. This compound was of sufficient purity to use in subsequent reactions. to reflux for 1 h The reaction mixture was then cooled in an ice bath to form a white precipitate The precipitate was then filtered dissolved in chloroform dried over MgSO4 The resulting solution was concentrated under reduced pressure

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

Procedure: To a solution of 1,1,1-Trifluoro-hexane-2,4-dione (1 g, 5.95 mmol) in absolute ethanol (10 mL) was added NH2NH2.xH2O drop-wise at 0° C. The reaction mixture warmed to the room temperature during 1 hour and refluxed overnight. Ethanol was then evaporated, residue dissolved in ethyl acetate (20 mL), washed consecutively with saturated brine solution and water, dried with Na2SO4 and concentrated to give the title compound as colorless oil. at 0° C refluxed overnight Ethanol was then evaporated residue dissolved in ethyl acetate (20 mL) washed consecutively with saturated brine solution and water dried with Na2SO4 concentrated

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

Procedure: The title compound was prepared by a similar method to that of Preparation 9 using 1,1,1-trifluorohexane-2,4-dione and 3,5-dichlorobenzaldehyde. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane gradually changing to pentane:ethyl acetate (5:1, by volume). The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford a mixture of the title compounds (500 mg) as a yellow oil. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford

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

Procedure: The title compound was prepared by a similar method to that of Preparation 9 using 1,1,1-trifluorohexane-2,4-dione and 3,5-dichlorobenzaldehyde. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane gradually changing to pentane:ethyl acetate (5:1, by volume). The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford a mixture of the title compounds (500 mg) as a yellow oil. The crude product was purified by flash chromatography on silica gel eluting with a solvent gradient of pentane The product was further purified by flash chromatography eluting with dichloromethane:pentane (1:10, by volume) to afford

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

Procedure: To a solution of 1,1,1-Trifluoro-hexane-2,4-dione (1 g, 5.95 mmol) in absolute ethanol (10 mL) was added NH2NH2.xH2O drop-wise at 0° C. The reaction mixture warmed to the room temperature during 1 hour and refluxed overnight. Ethanol was then evaporated, residue dissolved in ethyl acetate (20 mL), washed consecutively with saturated brine solution and water, dried with Na2SO4 and concentrated to give the title compound as colorless oil. at 0° C refluxed overnight Ethanol was then evaporated residue dissolved in ethyl acetate (20 mL) washed consecutively with saturated brine solution and water dried with Na2SO4 concentrated