Three derivatives of quaternary ammonium salts of ethanolamine were synthesized by the reaction of N,N-dimethyl ethanolamine with benzyl chloride, lauryl bromide and octadecyl bromide, respectively.

• 以N,N-二甲基甲酰胺为溶剂,乙酸乙酯为催化剂,N,N-二甲基乙醇胺分别与苄基氯、十二烷基溴和十八烷基溴作用,得到了3个N,N-二甲基乙醇胺的季铵盐衍生物。