Production method of N,O-bistrimethylsilyl trifluoroacetamide

The invention discloses a production method of N,O-bistrimethylsilyl trifluoroacetamide; the production method comprises the steps: introducing ammonia gas to ethyl trifluoroacetate under stirring, carrying out an acylation reaction of ethyl trifluoroacetate, and generating an intermediate of trifluoroacetamide and a byproduct of ethanol; carrying out a reaction of trifluoroacetamide with trimethylchlorosilane in the presence of triethylamine to obtain N,O-bistrimethylsilyl trifluoroacetamide and triethylamine hydrochloride; and separating N,O-bistrimethylsilyl trifluoroacetamide and triethylamine hydrochloride under specific conditions, rectifying N,O-bistrimethylsilyl trifluoroacetamide to obtain the finished product N,O-bistrimethylsilyl trifluoroacetamide. Under the action of ammonia gas, the raw material ethyl trifluoroacetate undergoes the acylation reaction, then the synthesis reaction is carried out under the specific conditions, and the method has the advantages of simple operation, easy control of t