The catalytic effect of anion-exchanged supported ionic liquid on aza-Michael-type addition
作者:Mohammad Hadi Ghasemi、Elaheh Kowsari
DOI:10.1007/s11164-016-2840-0
日期:2017.7
An effective synthesis of anion-exchanged supported ionic liquids using diatomaceous earth as solid support and its catalytic effect on the aza-Michael-type addition is described. Anionic polytungstophosphate and bisulfate ion are used in the anion-exchange step in catalyst design. In addition, the aza-Michael-type addition of various amines to 2- and 4-vinyl pyridine was examined in this article. The catalytic system can be separated from the reaction mixture and recycled in subsequent reactions. The structure of anion-exchanged supported ionic liquid on diatomaceous earth was studied by XRD, FT-IR, SEM, TGA and BET techniques. The structure of organic products was determined by 1HNMR, 13CNMR, FTIR, CHN and MASS spectroscopy.
本文描述了一种有效的阴离子交换支持离子液体的合成,采用硅藻土作为固体支撑,并研究其在阿扎-迈克尔型加成反应中的催化效果。在催化剂设计的阴离子交换步骤中,使用了阴离子聚钨酸盐和亚硫酸氢根离子。此外,文章还考察了各种胺与2-和4-乙烯基吡啶的阿扎-迈克尔型加成反应。该催化体系可以从反应混合物中分离并在后续反应中回收利用。通过XRD、FT-IR、SEM、TGA和BET技术研究了在硅藻土上阴离子交换的支持离子液体的结构。通过1H NMR、13C NMR、FTIR、CHN和质谱技术确定了有机产物的结构。