2-amino-N-(2,2,2-trifluoroethyl) acetamide, which is usually stable in the form of salt, is a key intermediate in the synthesis of fluralaner, a new broad-spectrum veterinary insecticide.
The method of preparing 2-amino-N-(2,2,2-trifluoroethyl) acetamide and its salt is to react the glycine protected by N-phthalyl group with trifluoroethylamine or its salt to form an amide, and remove the protective group under the action of hydrated fibril to obtain the crude product of 2- amino-N-(2,2,2-trifluoroethyl) acetamide.The crude product can be salted with acid to get a salt of 2-amino-N-(2,2, 2-trifluoroethyl) acetamide, and finally add a base to dissociate pure 2-amino-N-(2,2, 2-trifluoroethyl) ethylkuroamine.
