Development and Applications of Transesterification Reactions Catalyzed by N-Heterocyclic Olefins
作者:Marcus Blümel、Janina-Miriam Noy、Dieter Enders、Martina H. Stenzel、Thanh V. Nguyen
DOI:10.1021/acs.orglett.6b00835
日期:2016.5.6
A novel method to utilize N-heterocyclic olefins (NHOs), the alkylidene derivatives of N-heterocycic carbenes, as organocatalysts to promote transesterification reactions has been developed. Because of their strong Brønsted/Lewis basicity, NHOs can enhance the nucleophilicity of alcohols for their acylation reactions with carboxylic esters. This transformation can be employed in industrially relevant
已经开发出一种利用N-杂环卡宾的亚烷基衍生物N-杂环烯烃(NHO)作为有机催化剂来促进酯交换反应的新方法。由于其强大的Brønsted/ Lewis碱性,NHO可以增强醇与羧酸酯的酰化反应的亲核性。这种转化可用于与工业相关的过程中,例如生产生物柴油,从塑料瓶中解聚聚对苯二甲酸乙二醇酯(PET)以便回收利用,以及环酯的开环聚合以形成可生物降解的聚合物,例如聚丙交酯(PLA)和聚己内酯(PCL)。