Synthesis, characterization, and application of a bifunctional coupler containing a five- and a six-membered ring carbonate
作者:Yingchun He、Helmut Keul、Martin Möller
DOI:10.1016/j.reactfunctpolym.2010.11.031
日期:2011.2
5-Ethyl-5-(((2-oxo-1,3-dioxolan-4-yl)methoxy)methyl)-1,3-dioxan-2-one (BC56) bearing a five- and six-membered ring carbonate was successfully synthesized and characterized. In model reactions it was shown that BC56 reacts selectively with 1 eq. of a primary amine at low temperature, only/mainly the six-membered ring carbonate is converted. Ionic, hydrophilic and hydrophobic amines were used to prepare
带有五元和六元环状碳酸酯的5-乙基-5-((((2-oxo-1,3-dioxolan-4-yl)methoxy)甲基)-1,3- dioxan -2-one(BC56)已成功合成和表征。在模型反应中,表明BC56与1当量选择性反应。在低温下,仅/主要是六元环碳酸酯被转化。离子,亲水和疏水胺用于制备功能性偶联剂。在更严格的反应条件下,功能性偶合剂与第二伯胺基的反应产生偶合产物。两者,BC56的缩聚在一步法(程序A)或两步反应(程序B)中与二胺反应生成聚(羟基氨基甲酸酯)或其低聚物。测试了不同的反应条件以合成具有更高分子量的聚(羟基氨基甲酸酯)。溶剂对所得聚合物的分子量影响最大。在极性较低的溶剂(例如THF和CHCl 3)中,分子量较高的聚合物(中号¯w≈10,000G/摩尔)获得; 在具有高极性(例如DMAc和DMF)低聚物的溶剂中(2000<中号¯w<6000G/摩尔)获得了。使用方法