Prepare a dry, clean 1L four-necked flask. 18g of 3,3,3-trifluoro-2,2-dimethylpropanenitrile was added to it, and 500 ml of a 5 mol/L sodium hydroxide aqueous solution was placed in the flask; stir well; the mixture was heated to a temperature of 90-100 ° C and refluxed overnight. The reaction was terminated until 3,3,3-trifluoro-2,2-dimethylpropanenitrile was completely reacted. Concentrated hydrochloric acid was used to adjust the pH to 1. Continue stirring for 30 minutes, Extracted with 50*3ml of dichloromethane; the organic layers were combined and concentrated to give a white solid (3,3,3-Trifluoro-2,2-dimethylpropionic acid). The yield was 84.3% (GC 98%).
