Methyl 3-bromo-2,4,5-trifluorobenzoate

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

Procedure: 269 g of methyl 3-bromo-2,4,5-trifluoro-benzoate and 108 g of copper cyanide are heated to reflux for 5 hours in 400 ml of dimethylformamide. All volatile constituents of the reaction mixture are then removed by distillation in vacuo. The distillate is then fractionated on a column. 133 g of methyl 3-cyano-2,4,5-trifluoro-benzoate of boiling point 88-89° C./0.01 mbar are obtained. All volatile constituents of the reaction mixture are then removed by distillation in vacuo

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

Procedure: 772 g of 3-bromo-2,4,5-trifluoro-benzoylfluoride are added dropwise with ice-cooling to a mixture of 1460 ml of methanol and 340 g of triethylamine. Stirring is carried out at room temperature for 1 hour. The reaction mixture is concentrated, the residue is taken up in water and methylene chloride, and the aqueous phase is again extracted by shaking with methylene chloride. After drying the organic phase over sodium sulphate, it is concentrated and the residue is distilled in vacuo. 752.4 g of methyl 3-bromo-2,4,5-trifluoro-benzoate of boiling point 122° C./20 mbar are obtained. The reaction mixture is concentrated methylene chloride, and the aqueous phase is again extracted by shaking with methylene chloride After drying the organic phase over sodium sulphate, it is concentrated the residue is distilled in vacuo

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

Procedure: A mixture of 269 g of methyl 3-bromo-2,4,5-trifluorobenzoate, 108 g of copper(I) cyanide and 400 ml of dimethylformainide is heated under reflux for 5 hours. All volatile components are distilled off in vacuo. Fractional distillation of the resulting mixture gives 133 g of the title compound. is heated under reflux for 5 hours All volatile components are distilled off in vacuo Fractional distillation of the resulting mixture

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

Procedure: A mixture of 269 g of methyl 3-bromo-2,4,5-trifluorobenzoate, 108 g of copper(I) cyanide and 400 ml of dimethylformainide is heated under reflux for 5 hours. All volatile components are distilled off in vacuo. Fractional distillation of the resulting mixture gives 133 g of the title compound. is heated under reflux for 5 hours All volatile components are distilled off in vacuo Fractional distillation of the resulting mixture

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

Procedure: 772 g of 3-bromo-2,4,5-trifluoro-benzoyl fluoride are added dropwise to 1460 ml of methanol and 340 g of triethylamin, while cooling with ice. The mixture is stirred at room temperature for 1 hour. The reaction mixture is concentrated in vacuo and the resulting residue is taken up in water and methylene chloride. The water is extracted with methylene chloride once more. The organic phase is dried with Na2CO3 and concentrated in vacuo. The resulting residue is distilled in vacuo. while cooling with ice The reaction mixture is concentrated in vacuo The water is extracted with methylene chloride once more The organic phase is dried with Na2CO3 concentrated in vacuo The resulting residue is distilled in vacuo

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

Procedure: A mixture of 269 g of methyl 3-bromo-2,4,5-trifluorobenzoate, 108 g of copper(I) cyanide and 400 ml of dimethylformamide is heated under reflux for 5 hours. All volatile components are distilled off in vacuo. Fractional distillation of the resulting mixture gives 133 g of the title compound. is heated under reflux for 5 hours All volatile components are distilled off in vacuo Fractional distillation of the resulting mixture

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

Procedure: A mixture of 269 g of methyl 3-bromo-2,4,5-trifluorobenzoate, 108 g of copper(I) cyanide and 400 ml of dimethylformamide is heated under reflux for 5 hours. All volatile components are distilled off in vacuo. Fractional distillation of the resulting mixture gives 133 g of the title compound. is heated under reflux for 5 hours All volatile components are distilled off in vacuo Fractional distillation of the resulting mixture

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

Procedure: 772 g of 3-bromo-2,4,5-trifluoro-benzoyl fluoride are added dropwise to 1460 ml of methanol and 340 g of triethylamin, while cooling with ice. The mixture is stirred at room temperature for 1 hour. The reaction mixture is concentrated in vacuo and the resulting residue is taken up in water and methylene chloride. The water is extracted with methylene chloride once more. The organic phase is dried with Na2CO3 and concentrated in vacuo. The resulting residue is distilled in vacuo. while cooling with ice The reaction mixture is concentrated in vacuo The water is extracted with methylene chloride once more The organic phase is dried with Na2CO3 concentrated in vacuo The resulting residue is distilled in vacuo

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

Procedure: 269 g of methyl 3-bromo-2,4,5-trifluoro-benzoate and 108 g of copper cyanide are heated to reflux for 5 hours in 400 ml of dimethylformamide. All volatile constituents of the reaction mixture are then removed by distillation in vacuo. The distillate is then fractionated on a column. 133 g of methyl 3-cyano-2,4,5-trifluoro-benzoate of boiling point 88-89° C./0.01 mbar are obtained. All volatile constituents of the reaction mixture are then removed by distillation in vacuo

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

Procedure: 772 g of 3-bromo-2,4,5-trifluoro-benzoylfluoride are added dropwise with ice-cooling to a mixture of 1460 ml of methanol and 340 g of triethylamine. Stirring is carried out at room temperature for 1 hour. The reaction mixture is concentrated, the residue is taken up in water and methylene chloride, and the aqueous phase is again extracted by shaking with methylene chloride. After drying the organic phase over sodium sulphate, it is concentrated and the residue is distilled in vacuo. 752.4 g of methyl 3-bromo-2,4,5-trifluoro-benzoate of boiling point 122° C./20 mbar are obtained. The reaction mixture is concentrated methylene chloride, and the aqueous phase is again extracted by shaking with methylene chloride After drying the organic phase over sodium sulphate, it is concentrated the residue is distilled in vacuo

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

Procedure: 269 g of methyl 3-bromo-2,4,5-trifluoro-benzoate and 108 g of copper cyanide are heated to reflux for 5 hours in 400 ml of dimethylformamide. All volatile constituents of the reaction mixture are then removed by distillation in vacuo. The distillate is then fractionated on a column. 133 g of methyl 3-cyano-2,4,5-trifluoro-benzoate of boiling point 88-89° C./0.01 mbar are obtained. All volatile constituents of the reaction mixture are then removed by distillation in vacuo

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

Procedure: 772 g of 3-bromo-2,4,5-trifluoro-benzoylfluoride are added dropwise with ice-cooling to a mixture of 1460 ml of methanol and 340 g of triethylamine. Stirring is carried out at room temperature for 1 hour. The reaction mixture is concentrated, the residue is taken up in water and methylene chloride, and the aqueous phase is again extracted by shaking with methylene chloride. After drying the organic phase over sodium sulphate, it is concentrated and the residue is distilled in vacuo. 752.4 g of methyl 3-bromo-2,4,5-trifluoro-benzoate of boiling point 122° C./20 mbar are obtained. The reaction mixture is concentrated methylene chloride, and the aqueous phase is again extracted by shaking with methylene chloride After drying the organic phase over sodium sulphate, it is concentrated the residue is distilled in vacuo