Efficient and eco-friendly process for the synthesis of N-substituted 4-methylene-2-oxazolidinones in ionic liquids
作者:Qinghua Zhang、Feng Shi、Yanlong Gu、Jing Yang、Youquan Deng
DOI:10.1016/j.tetlet.2005.06.116
日期:2005.8
The carbonylation of amines with propargylic alcohol using CO2 as carbonyl source to yield N-substituted 4-methylene-2-oxazolidinones could efficiently proceed in ionicliquids, and various 4-methylene oxazolidinones with high yields could be obtained under relatively mild conditions. This result showed that ionicliquid might be an effective catalyst and reaction medium for the activation of CO2,
tetrabutylphosphonium imidazol ([P4444][Im]) as a catalyst was described. Catalysis studies indicate that this catalytic system is an effective catalyst for the conversion of CO2 into oxazolidinones at room temperature and ambientpressure without any solvent. The results provide a useful way to design novel noble metal-free catalyst systems for the transformation of CO2 into other valuable compounds.
最近,从可持续化学的角度来看,在不使用贵金属催化剂的情况下将二氧化碳 (CO2) 有效地化学固定为高价值化学品已变得极具吸引力。在这项工作中,描述了通过将 CuI 和四丁基鏻咪唑 ([P4444][Im]) 作为催化剂以原子经济和环境友好的方式进行的炔丙醇、苯胺和 CO2 的一锅三组分反应。催化研究表明,该催化体系是在室温和环境压力下无需任何溶剂即可将 CO2 转化为恶唑烷酮的有效催化剂。结果为设计用于将 CO2 转化为其他有价值的化合物的新型不含贵金属的催化剂系统提供了一种有用的方法。