4-氯-2-氟苯乙酸乙酯

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Then, 3.6 g of sodium hydride (60% in oil) was suspended in 120 ml of tetrahydrofuran, and the mixture was cooled to 5° C., to which a solution of 17.8 g of ethyl 4-chloro-2-fluorophenylacetate in 120 nm of tetrahydrofliran was slowly added dropwise. The mixture was stirred for 30 minutes with a gradual temperature increase to room temperature, to which 20 ml of ethyl formate was added at room temperature, followed by stirring for 3 hours. Then, the reaction mixture was cooled with ice, to which diluted aqueous hydrochloric acid was added. The reaction mixture was poured into water and extracted with ethyl acetate. The organic layer was washed with saturated sodium chloride solution, dried, and concentrated. The residue was subjected to silica gel column chromatography, which afforded 19.1 g of ethyl 2-(4-chloro-2-fluorophenyl)-2-formylacetate. was slowly added dropwise was added at room temperature by stirring for 3 hours was added extracted with ethyl acetate The organic layer was washed with saturated sodium chloride solution dried concentrated

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Then, 3.6 g of sodium hydride (60% in oil) was suspended in 120 ml of tetrahydrofuran, and the mixture was cooled to 5° C., to which a solution of 17.8 g of ethyl 4-choro-2-fluorophenylacetate in 120 ml of tetrahydrofuran was slowly added drop-wise. The mixture was stirred for 30 minutes with a gradual temperature increase to room temperature, to which 20 ml of ethyl formate was added at room temperature, followed by stirring for 3 hours. Then, the reaction mixture was cooled with ice, to which diluted aqueous hydrochloric acid was added. The reaction mixture was poured into water and extracted with ethyl acetate. The organic layer was washed with saturated sodium chloride solution, dried, and concentrated. The residue was subjected to silica gel column chromatography, which afforded 19.1 g of ethyl 2-(4-chloro-2-fluorophenyl)-2-formylacetate. was added at room temperature by stirring for 3 hours was added extracted with ethyl acetate The organic layer was washed with saturated sodium chloride solution dried concentrated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Then, 15.1 g of 4-chloro-2-fluorophenylacetonitrile was dissolved in 150 ml of ethanol, to which 10 ml of suiliric acid was added, and the mixture was heated under reflux for 65 hours. After completion of the reaction, the reaction mixture was poured into water and extracted with ethyl acetate. The organic layer was washed with saturated sodium chloride solution, dried, and concentrated. The residue was subjected to silica gel column chromatography, which afforded 17.8 g of ethyl 4-chloro-2-fluorophenylacetate. was added the mixture was heated under reflux for 65 hours After completion of the reaction extracted with ethyl acetate The organic layer was washed with saturated sodium chloride solution dried concentrated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Then, 3.6 g of sodium hydride (60% in oil) was suspended in 120 ml of tetrahydrofuran, and the mixture was cooled to 5° C., to which a solution of 17.8 g of ethyl 4-chloro-2-fluorophenylacetate in 120 nm of tetrahydrofliran was slowly added dropwise. The mixture was stirred for 30 minutes with a gradual temperature increase to room temperature, to which 20 ml of ethyl formate was added at room temperature, followed by stirring for 3 hours. Then, the reaction mixture was cooled with ice, to which diluted aqueous hydrochloric acid was added. The reaction mixture was poured into water and extracted with ethyl acetate. The organic layer was washed with saturated sodium chloride solution, dried, and concentrated. The residue was subjected to silica gel column chromatography, which afforded 19.1 g of ethyl 2-(4-chloro-2-fluorophenyl)-2-formylacetate. was slowly added dropwise was added at room temperature by stirring for 3 hours was added extracted with ethyl acetate The organic layer was washed with saturated sodium chloride solution dried concentrated