Preparation, characterization, and application of 1,1′-disulfo-[2,2′-bipyridine]-1,1′-diium chloride ionic liquid as an efficient catalyst for the synthesis of benzimidazole derivatives
作者:Farhad Shirini、Masoumeh Abedini、Mohadeseh Seddighi、Fatemeh Shaabani Arbosara
DOI:10.1007/s11164-014-1852-x
日期:2015.10
In this study, 2,2′-bipyridine was treated with chlorosulfonic acid and 1,1′-disulfo-[2,2′-bipyridine]-1,1′-diium chloride, [BiPy](SO3H)2Cl2, as a new ionic liquid catalyst was obtained and characterized with a variety of techniques including IR, 1H, and 13C NMR, Hammett acidity function as well as mass spectra method. After preparation and characterization, this ionic liquid was used as an efficient
在这项研究中,2,2'-联吡啶用氯磺酸和1,1'-二磺基-[2,2'-联吡啶] -1,1'-氯化二氯化钠[BiPy](SO 3 H)2 Cl处理如图2所示,获得了一种新型离子液体催化剂,并通过多种技术进行了表征,包括IR,1 H和13C NMR,哈米特酸度函数以及质谱法。经过制备和表征,该离子液体被用作绿色和温和合成苯并咪唑衍生物的有效催化剂。另外,该试剂能够有效地催化由包括肟和半咔唑酮在内的醛的受保护衍生物制备苯并咪唑衍生物。所有反应均在温和条件下以优异的产率进行。