Multi-component synthesis of highly substituted imidazoles catalyzed by nanorod vanadatesulfuric acid
作者:Masoud Nasr-Esfahani、Morteza Montazerozohori、Tooba Abdizadeh
DOI:10.1515/chempap-2015-0156
日期:2015.1.1
as a recyclable and eco-benign catalyst, was used for one-pot synthesis of 2,4,5-trisubstituted imidazoles and 1,2,4,5-tetrasubstituted imidazoles using aldehydes, benzil, benzoin or 9,10-phenanthrenequinone and ammonium acetate or aniline under solvent-free conditions providing high to excellent yields. VSA is easily prepared by a simple reaction of chlorosulfonic acid and sodium metavanadate in high
纳米棒钒酸硫酸盐(VSA NRs)作为可循环利用的生态友好型催化剂,用于通过醛,苯甲腈,安息香一锅法合成2,4,5-三取代的咪唑和1,2,4,5-四取代的咪唑或在无溶剂条件下的9,10菲醌和乙酸铵或苯胺可提供高到极好的收率。通过简单的高纯度氯磺酸和偏钒酸钠的反应即可轻松制备VSA。与常规方法相比,本方案具有许多优点,例如方法简单,反应时间短,产率高,易于后处理,催化剂的可回收性和可再利用性以及产物的简单纯化。