2,2,2-trifluoroethyl acetate

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: 85 g (0.85 mol) of trifluoroethanol and 80 ml of diethyl ether were poured to a four-neck flask of 2 liter, and further 129 g (1.27 mmol/1.49 eq) of triethylamine was added thereto. Then, the resultant mixture was ice-cooled and stirred while dropping a solution diluting 100 g (1.27 mol/1.49 eq) of acetyl chloride with 80 ml of diethyl ether by dropping funnel. While dropping, the temperature of the resultant reacted solution was kept between 27 to 35° C. The period of time for dropping was 20 minutes. After that, the resultant mixed solution was stirred for 1.5 hours at room temperature and 350 ml of water was added, then, the reaction was completed. Subsequently, an organic phase was separated by the separatory funnel and dried using magnesium sulfate. Thereafter, purification by distilling was conducted to obtain 88 g of 2,2,2-trifluoroethyl acetate (CH3COOCH2CF3) of which yield was 72.9%. was added cooled the temperature of the resultant reacted solution was kept between 27 to 35° C After that, the resultant mixed solution was stirred for 1.5 hours at room temperature Subsequently, an organic phase was separated by the separatory funnel dried Thereafter, purification by distilling

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

Procedure: To a suspension of 4-nitrobenzylamine hydrochloride (10.0 g) and triethylamine (22.2 ml) in acetonitrile (100 ml) was added trifluoroethyl acetate (12.6 ml) at room temperature and the mixture was stirred for 24 hours. The solvent was removed under reduced pressure, water was added to the mixture and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over magnesium sulfate and concentrated under reduced pressure. The precipitated crystals were collected by filtration. The crystals were washed with hexane, to give N-(4-nitrobenzyl)trifluoroacetoamide (12.79 g) as colorless crystals. The solvent was removed under reduced pressure, water was added to the mixture the mixture was extracted with ethyl acetate The organic layer was washed with saturated brine dried over magnesium sulfate concentrated under reduced pressure The precipitated crystals were collected by filtration The crystals were washed with hexane

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

Procedure: 15.8 g of 3,5-dichloro-2-acetylpyridine are introduced together with 12.0 ml of trifluoroethyl acetate into 125 ml of absolute ether. With stirring, the mixture is cooled using an ice-bath and 46.6 ml of, a 21% sodium ethanolate solution in ethanol are added dropwise. The ice-bath is then removed and the mixture is subsequently stirred overnight at 25° C. After cooling the reaction mixture in an ice-bath and adding dropwise 7.5 ml of glacial acetic acid, the mixture is concentrated in vacuo. 39.0 g of 1-(3,5-dichloro-2-pyridyl)-3-trifluoromethylpropane-1,3-dione are obtained, which can be used directly for the following cyclisation step. the mixture is cooled The ice-bath is then removed After cooling the reaction mixture in an ice-bath adding dropwise 7.5 ml of glacial acetic acid the mixture is concentrated in vacuo

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

Procedure: 15.8 g of 3,5-dichloro-2-acetylpyridine are introduced together with 12.0 ml of trifluoroethyl acetate into 125 ml of absolute ether. With stirring, the mixture is cooled using an ice-bath and 46.6 ml of, a 21% sodium ethanolate solution in ethanol are added dropwise. The ice-bath is then removed and the mixture is subsequently stirred overnight at 25° C. After cooling the reaction mixture in an ice-bath and adding dropwise 7.5 ml of glacial acetic acid, the mixture is concentrated in vacuo. 39.0 g of 1-(3,5-dichloro-2-pyridyl)-3-trifluoromethylpropane-1,3-dione are obtained, which can be used directly for the following cyclisation step. the mixture is cooled The ice-bath is then removed After cooling the reaction mixture in an ice-bath adding dropwise 7.5 ml of glacial acetic acid the mixture is concentrated in vacuo

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

Procedure: To a solution of -butyl 4-(5-acetylpyrimidin-2-yl)piperazine-1-carboxylate (4.5 g, 14.7 mmol) in dichloromethane (80 mL) was added trifluoroethyl acetate (20 mL), and the mixture was stirred at RT for 3 h. LCMS showed the reaction was completed. The reaction mixture was neutralized with sodium carbonate solution and extracted with dichloromethane. The organic layer was dried over sodium sulfate, filtered and concentrated to afford the title compound as a light yellow solid (2.6 g, 86%), which was directly used in the next step without further purification. MS (ES+) C10H14N4O requires: 206, found: 207 [M+H]+. extracted with dichloromethane The organic layer was dried over sodium sulfate filtered concentrated

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

Procedure: To a two-neck round bottom flask purged with argon was added successively 4-(1,4,8,11-tetraazacyclotetradec-1-ylmethyl)-benzoic acid (90 mg, 0.24 mmol), dry methanol (1 ml), dry triethyl amine (0.5 ml) and trifluoroethylacetate (1.7 ml). All following procedures were carried on in argon atmosphere. The mixture was stirred for 60 hours. After that the solvents were removed at reduced pressure and the residue was taken up in dry tetrahydrofurane (5 ml). The THF solution was filtered and the solvent removed at reduced pressure. The residue was dried in vacuo for 4 hours to produce 0.54 g of oily compound. MS m/z 623.5 M[C24H27F9N4O5]+1. To a two-neck round bottom flask purged with argon After that the solvents were removed at reduced pressure The THF solution was filtered the solvent removed at reduced pressure The residue was dried in vacuo for 4 hours

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

Procedure: 85 g (0.85 mol) of trifluoroethanol and 80 ml of diethyl ether were poured to a four-neck flask of 2 liter, and further 129 g (1.27 mmol/1.49 eq) of triethylamine was added thereto. Then, the resultant mixture was ice-cooled and stirred while dropping a solution diluting 100 g (1.27 mol/1.49 eq) of acetyl chloride with 80 ml of diethyl ether by dropping funnel. While dropping, the temperature of the resultant reacted solution was kept between 27 to 35° C. The period of time for dropping was 20 minutes. After that, the resultant mixed solution was stirred for 1.5 hours at room temperature and 350 ml of water was added, then, the reaction was completed. Subsequently, an organic phase was separated by the separatory funnel and dried using magnesium sulfate. Thereafter, purification by distilling was conducted to obtain 88 g of 2,2,2-trifluoroethyl acetate (CH3COOCH2CF3) of which yield was 72.9%. was added cooled the temperature of the resultant reacted solution was kept between 27 to 35° C After that, the resultant mixed solution was stirred for 1.5 hours at room temperature Subsequently, an organic phase was separated by the separatory funnel dried Thereafter, purification by distilling

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: 85 g (0.85 mol) of trifluoroethanol and 80 ml of diethyl ether were poured to a separable flask of 1 liter, and further 129 g (1.27 mol/1.5 eq) of triethylamine was added thereto. Then, the resultant mixture was ice-cooled and stirred while dropping a solution diluting 100 g (1.27 mol/1.5 eq) of acetyl chloride with 80 ml of diethyl ether by dropping funnel. While dropping, the temperature of the solution was kept between 27° C. and 35° C. The period of time for dropping was 20 minutes. After that, the resultant mixed solution was stirred for 1.5 hours at room temperature and 350 ml of water was added, then, the reaction was completed. Subsequently, an organic phase was separated by the reparatory funnel and dried using magnesium sulfate. Thereafter, purification by distilling was conducted to obtain 88 g of 2,2,2-trifluoroethyl acetate of which yield was 73%. was added cooled was kept between 27° C. and 35° C After that, the resultant mixed solution was stirred for 1.5 hours at room temperature Subsequently, an organic phase was separated by the reparatory funnel dried Thereafter, purification by distilling