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前言最近,报道了用胺催化的十二醇乙氧基化反应。根据以前发表的观点,胺在80℃就能很好地催化反应,含有两个甲基的不对称胺(例如N,N-二甲基辛胺)的催化作用特别好。在这种情况,催化反应需要的游离电子对在空间没有屏蔽。从这类具有有利立体结构的胺可望得到非常高的催化活性。因而,含有桥头氮的奎宁环以及类似的其它分子被选作十二醇乙氧基化的催化剂。实验半微量级乙氧基化,反应产物气相色谱分析,摩尔分布和分布常数的计算都
Introduction Recently, amine catalyzed dodecanol ethoxylation reactions have been reported. According to the previous published opinion, the amine catalyzes the reaction well at 80 ° C and the catalysis of asymmetric amines containing two methyl groups, such as N, N-dimethyloctylamine, is particularly good. In this case, the free electron pairs required for the catalytic reaction are not shielded in space. Very high catalytic activity is expected from such amines with advantageous stereostructures. Thus, quinine rings containing bridgehead nitrogen and similar other molecules are selected as the catalyst for the ethoxylation of dodecanol. Experimental semi-micro-level ethoxylation, gas chromatographic analysis of reaction products, calculation of molar distribution and distribution constant