Zirconyl chloride: an efficient recyclable catalyst for synthesis of 5-aryl-2-oxazolidinones from aziridines and CO2 under solvent-free conditions
作者:Ying Wu、Liang-Nian He、Ya Du、Jin-Quan Wang、Cheng-Xia Miao、Wei Li
DOI:10.1016/j.tet.2009.05.034
日期:2009.8
Zirconyl chloride was found to be an efficient catalyst for the cycloaddition reaction of aziridines with CO2, thus leading to the preferential formation of 5-aryl-2-oxazolidinones under solvent-free conditions. The methodology could be extended to various substituted aziridines with high conversion and chemo-, regio-, and stereoselectivity. Furthermore, the catalyst could be reused over five times
发现氧化锆氯化物是氮丙啶与CO 2的环加成反应的有效催化剂,因此导致在无溶剂条件下优先形成5-芳基-2-恶唑烷酮。该方法可以扩展到具有高转化率和化学,区域和立体选择性的各种取代的氮丙啶。此外,该催化剂可以重复使用五次,而不会显着降低活性。有趣的是,回收的催化剂与新鲜催化剂相比显示出更高的活性,大概是由于其形态变化。这种廉价且水分稳定的催化剂的使用使该方案实用,对环境无害且在经济上具有吸引力。