Eight-membered ring cyclic carbonates having an oxygen or an acylated nitrogen at position 6 were prepared by reaction of precursor diols with ethyl chloroformate. The cyclic carbonates undergo organocatalyzed ring opening polymerization. In one instance, the initial polymer formed comprises a carbonate repeat unit having a Boc-protected nitrogen in the polymer backbone. Deprotecting the nitrogen with acid forms a cationic carbonate repeat unit having a positive charged secondary ammonium nitrogen in the polymer backbone.
通过前体二醇与
乙酰氯甲酸酯反应制备了在6位具有氧或酰化氮的八元环环状
碳酸酯。这些环状
碳酸酯经过有机催化的开环聚合。在一个实例中,初始聚合物由具有Boc保护氮的
碳酸酯重复单元组成。用酸去保护氮会形成带有正电荷的次级
铵氮的阳离子
碳酸酯重复单元在聚合物骨架中。