Amide/Iminium Zwitterionic Catalysts for (Trans)esterification: Application in Biodiesel Synthesis
作者:Ying-Pong Lam、Xinyan Wang、Fei Tan、Wing-Hin Ng、Ying-Lung Steve Tse、Ying-Yeung Yeung
DOI:10.1021/acscatal.9b01959
日期:2019.9.6
organocatalysts based on an amide anion/iminium cation charge pair has been developed. The zwitterions are easily prepared by reacting aziridines with aminopyridines. They are catalytically applicable to transesterifications and dehydrative esterifications. Mechanistic studies reveal that the amide anion and iminium cation work synergistically in activating the reaction partners, with the iminium cationic