Method for preparing 1-substituted phenyl-4-ethoxycarbonyl-5-(diphenylphosphinyl)amino-1, 2, 3-triazole

The invention provides a method for preparing 1-substituted phenyl-4-ethoxycarbonyl-5-( diphenylphosphinyl)amino-1, 2, 3-triazole, and relates to the field of organic synthesis. The preparation method comprises the following steps of: (1) allowing 1-substituted phenyl-4-ethoxycarbonyl-5-amino-1,2,3-triazole and diphenyl phosphorus chloride to be dissolved in a solvent and adding a small amount of alkali, stirring for 2-5 hours at a temperature of 20 DEG C to 25 DEG C, and then heating to 50-100 DEG C and holding and stirring for 1-3 hours to obtain a reaction mixture; and (2) cooling the reaction mixture to precipitate a precipitate, collecting the precipitate by filtration, washing with water until neutral, and drying in a vacuum to obtain the 1-substituted phenyl-4-ethoxycarbonyl-5-( diphenylphosphinyl)amino-1, 2, 3-triazole. The preparation method provided by the invention is simple, is safe to operate and is environmentally friendly.