ethyl 2-(2,4,6-trifluorophenyl)acetate

反応条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 2,4,6-trifluorophenylacetic acid (570 mg, 3.0 mmol), iodoethane (1.56 g, 10 mmol), and potassium carbonate (1.38 g, 10 mmol) in 5 mL of dimethylsulfoxide is stirred at 50° C. for 3 h, and cooled to room temperature. The mixture is partitioned between diethyl ether and water. The organic layer is washed with water, and saturated sodium chloride, dried over magnesium sulfate, and filtered through magnesol. The filtrate is concentrated to give ethyl 2,4,6-trifluorophenylacetate as a light yellow oil (581 mg, 2.66 mmol). cooled to room temperature The mixture is partitioned between diethyl ether and water The organic layer is washed with water, and saturated sodium chloride dried over magnesium sulfate filtered through magnesol The filtrate is concentrated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of ethyl 2,4,6-trifluorophenylacetate (436 mg, 2.0 mmol) in 3 mL of tetrahydrofuran is cooled to −78° C., and lithium diisopropylamide (2.0 M in heptane/tetrahydrofuran/ethylbenzene, 1.0 mL, 2.0 mmol) is added dropwise with stirring. The mixture is stirred at −78° C. for 1 h, and cycloheptanecarboxylic acid chloride (321 mg, 2.0 mmol) is added dropwise. The mixture is warmed to room temperature and acidified with 2 mL of 1.0 N hydrochloric acid. The product is extracted with ethyl acetate. The organic layer is washed with saturated sodium chloride, dried over magnesium sulfate, and concentrated. The residue is chromatographed over silica gel, eluting with a gradient of hexanes to 10% ethyl acetate in hexanes. Concentration provides ethyl 3-cycloheptyl-3-oxo-2-(2,4,6-trifluorophenyl)propanoate as a colorless oil (410 mg). MS: m/z 341.2 (M−H). The mixture is stirred at −78° C. for 1 h The product is extracted with ethyl acetate The organic layer is washed with saturated sodium chloride dried over magnesium sulfate concentrated The residue is chromatographed over silica gel eluting with a gradient of hexanes to 10% ethyl acetate in hexanes Concentration

反応条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 2,4,6-trifluorophenylacetic acid (570 mg, 3.0 mmol), iodoethane (1.56 g, 10 mmol), and potassium carbonate (1.38 g, 10 mmol) in 5 mL of dimethylsulfoxide is stirred at 50° C. for 3 h, and cooled to room temperature. The mixture is partitioned between diethyl ether and water. The organic layer is washed with water, and saturated sodium chloride, dried over magnesium sulfate, and filtered through hydrous magnesium silicate. The filtrate is concentrated to give ethyl 2,4,6-trifluorophenylacetate as a light yellow oil (581 mg, 2.66 mmol). cooled to room temperature The mixture is partitioned between diethyl ether and water The organic layer is washed with water, and saturated sodium chloride dried over magnesium sulfate filtered through hydrous magnesium silicate The filtrate is concentrated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of ethyl 2,4,6-trifluorophenylacetate (436 mg, 2.0 mmol) in 3 mL of tetrahydrofuran is cooled to −78° C., and lithium diisopropylamide (2.0 M in heptane/tetrahydrofuran/ethylbenzene, 1.0 mL, 2.0 mmol) is added dropwise with stirring. The mixture is stirred at −78° C. for 1 h, and cycloheptanecarboxylic acid chloride (321 mg, 2.0 mmol) is added dropwise. The mixture is warmed to room temperature and acidified with 2 mL of 1.0 N hydrochloric acid. The product is extracted with ethyl acetate. The organic layer is washed with saturated sodium chloride, dried over magnesium sulfate, and concentrated to a residue. The residue is chromatographed over silica gel, eluting with a gradient of hexanes to 10% ethyl acetate in hexanes. Concentration provides ethyl 3-cycloheptyl-3-oxo-2-(2,4,6-trifluorophenyl)propanoate as a colorless oil (410 mg). MS: m/z 341.2 (M−H). The mixture is stirred at −78° C. for 1 h The product is extracted with ethyl acetate The organic layer is washed with saturated sodium chloride dried over magnesium sulfate concentrated to a residue The residue is chromatographed over silica gel eluting with a gradient of hexanes to 10% ethyl acetate in hexanes Concentration

反応条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 2,4,6-trifluorophenylacetic acid (570 mg, 3.0 mmol), iodoethane (1.56 g, 10 mmol), and potassium carbonate (1.38 g, 10 mmol) in 5 mL of dimethylsulfoxide is stirred at 50° C. for 3 h, and cooled to room temperature. The mixture is partitioned between diethyl ether and water. The organic layer is washed with water and saturated sodium chloride, dried over magnesium sulfate, and filtered through hydrous magnesium silicate. The filtrate is concentrated to give ethyl 2,4,6-trifluorophenylacetate as a light yellow oil (581 mg, 2.66 mmol). cooled to room temperature The mixture is partitioned between diethyl ether and water The organic layer is washed with water and saturated sodium chloride dried over magnesium sulfate filtered through hydrous magnesium silicate The filtrate is concentrated

反応条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 2,4,6-trifluorophenylacetic acid (570 mg, 3.0 mmol), iodoethane (1.56 g, 10 mmol), and potassium carbonate (1.38 g, 10 mmol) in 5 mL of dimethylsulfoxide is stirred at 50° C. for 3 h, and cooled to room temperature. The mixture is partitioned between diethyl ether and water. The organic layer is washed with water, and saturated sodium chloride, dried over magnesium sulfate, and filtered through magnesol. The filtrate is concentrated to give ethyl 2,4,6-trifluorophenylacetate as a light yellow oil (581 mg, 2.66 mmol). cooled to room temperature The mixture is partitioned between diethyl ether and water The organic layer is washed with water, and saturated sodium chloride dried over magnesium sulfate filtered through magnesol The filtrate is concentrated

反応条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 2,4,6-trifluorophenylacetic acid (570 mg, 3.0 mmol), iodoethane (1.56 g, 10 mmol), and potassium carbonate (1.38 g, 10 mmol) in 5 mL of dimethylsulfoxide is stirred at 50° C. for 3 h, and cooled to room temperature. The mixture is partitioned between diethyl ether and water. The organic layer is washed with water, and saturated sodium chloride, dried over magnesium sulfate, and filtered through magnesol. The filtrate is concentrated to give ethyl 2,4,6-trifluorophenylacetate as a light yellow oil (581 mg, 2.66 mmol). cooled to room temperature The mixture is partitioned between diethyl ether and water The organic layer is washed with water, and saturated sodium chloride dried over magnesium sulfate filtered through magnesol The filtrate is concentrated