N,N-二甲基-N′-月桂酰基-1,3-丙二胺的合成

Synthesis of N,N-Dimethyl-N′-lauroyl-1,3-propylenediamine

以月桂酸和N ,N 二甲基 1,3 丙二胺为原料 ,合成了N ,N 二甲基 N′ 月桂酰基 1,3 丙二胺 ,通过改变反应温度、酸胺的量比和投料方式 ,探索反应的优化条件。结果显示 ,当反应温度为 16 0℃、n(月桂酸 )∶n(N ,N 二甲基 1,3 丙二胺 ) =1 0 0∶1 10 ,N ,N 二甲基 1,3 丙二胺按 40min连续滴加时 ,产物的游离酸值最低 ,为 5 5 4mg/g。

N,N Dimethyl N′ lauroyl 1,3 propylenediamine was synthesised with dodecanoic acid and 3 dimethyl aminopropylamine.The optimum reaction conditions were determined.When reaction temperature was 160 ℃,mole ratio of dodecanoic acid to 3 dimethylaminopropylamine was 1 00∶1 10 and time of feeding in 3 dimethylaminopropylamine was 40 min,the free acid value of product was 5 54 mg/g as the lowest.IR spectra of product is the same as that of standard sample.