Synthesis of new low-viscous sulfonic acid-functionalized ionic liquid and its application as a Brönsted liquid acid catalyst for the one-pot mechanosynthesis of 4H-pyrans through the ball milling process
作者:Nader Ghaffari Khaligh、Taraneh Mihankhah、Mohd Rafie Johan
DOI:10.1016/j.molliq.2019.01.024
日期:2019.3
solubility in some common solvents. The catalytic activity of new SAIL was demonstrated for the one-pot mechanosynthesis of pyrano[4,3-b]pyrans, dihydropyrano[3,2-c]chromene and tetrahydrobenzo[b]pyrans using planetary ball mill under solvent-free conditions. This current mechanosynthesis methodology for the synthesis of 4H-pyran-annulated heterocyclic scaffolds displays a combination of the synthetic virtues
在本研究中,一种新的低粘度磺酸官能化离子液体(SAIL)即。合成了4,4'-三亚甲基-N,N'-磺酸-二哌啶鎓氯化物,并用FTIR,1D和2D NMR以及质谱进行了表征。然后,确定了新的SAIL的一些特性,包括pH,粘度,密度和在某些常用溶剂中的溶解度。在无溶剂条件下,使用行星式球磨机证明了新SAIL对吡喃并[4,3- b ]吡喃,二氢吡喃并[3,2- c ]色烯和四氢苯并[ b ]吡喃的一锅机械合成具有催化活性。目前用于合成4 H的机械合成方法-吡喃环化的杂环支架结合了常规多组分反应的合成优点,生态效益和简单的机械催化方法的便利性。新的SAIL易于回收利用,可以重复使用多次,而不会造成严重的活动损失。