反应详情

111 g of 3-cyano-2,4,5-trifluoro-benzoic acid, 84 g of oxalyl chloride and a few drops of dimethylformamide in 930 ml of dry methylene chloride are stirred at room temperature for 5 hours. The reaction mixture is concentrated by evaporation and the residue is distilled in vacuo.

1. concentrationThe reaction mixture is concentrated by evaporation
2. distillationthe residue is distilled in vacuo