[MerDABCO-BSA][HSO4]2: A novel polymer supported Brønsted acidic ionic liquid catalyst for the synthesis of biscoumarins and ortho-aminocarbonitriles
作者:Pradeep Patil、Archana Yadav、Dattatray Chandam、Rutikesh Gurav、Shankar Hangirgekar、Sandeep Sankpal
DOI:10.1016/j.molstruc.2022.132622
日期:2022.7
polymer supported Brønsted acidic ionic liquid catalyst is synthesized by functionalization of Merrifield resin with DABCO, 1,4-butane sultone and concentrated H2SO4 is reported. The structure of synthesized catalyst was confirmed by FT-IR, SEM, EDX, XRD, XPS, TGA and DTA techniques. The catalytic efficiency of novel Brønsted acidic [MerDABCO-BSA][HSO4]2 was evaluated in the synthesis of biscoumarins
在目前的工作中,报道了一种新型聚合物负载的 Brønsted 酸性离子液体催化剂,该催化剂是通过用 DABCO、1,4-丁磺酸内酯和浓 H 2 SO 4对 Merrifield 树脂进行功能化而合成的。通过FT-IR、SEM、EDX、XRD、XPS、TGA和DTA等技术对合成催化剂的结构进行了确认。在 80 °C 下,在乙醇中由 4-羟基香豆素和芳基醛合成双香豆素时,评估了新型 Brønsted 酸性 [MerDABCO-BSA][HSO 4 ] 2的催化效率。此外,邻氨基腈是由环己酮、丙二腈和芳香醛在乙醇:水(70:30 v/v )中合成的。) 在超声波条件下。该催化剂在热和超声条件下表现出良好的稳定性。回收的催化剂在四个循环中表现出良好的催化效率,而催化活性没有显着下降。本协议具有操作简单、反应时间更短和产品产量更高的优点。