The preparation of NN-dialkyl-substituted amides of pentane-1,3,5-tricarboxylic acid did not proceed normally owing to formation of anhydride during conversion of the acid to acid chloride with thionyl chloride. Since anhydride formation appeared to involve the central carboxyl groups of two molecules, reduction of the resulting amides gave, in addition to the expected triamines, diamino-alcohols where
戊烷-1,3,5-
三羧酸的NN-二烷基取代的酰胺的制备通常无法进行,这是由于在用亚
硫酰氯将酸转化为酰
氯的过程中形成了酸酐。因为酸酐的形成似乎涉及两个分子的中心羧基,所以除预期的三胺外,所得酰胺的还原还得到了羟基为中心且
氨基为末端的二
氨基醇。当用亚
硫酰氯处理
庚烷-1,3,5,7-四
羧酸时,发生了类似的反应。