The Synthesis of 2-Aminobenzoxazoles Using Reusable Ionic Liquid as a Green Catalyst under Mild Conditions
作者:Ya Zhou、Zhiqing Liu、Tingting Yuan、Jianbin Huang、Chenjiang Liu
DOI:10.3390/molecules22040576
日期:——
A facile, green, and efficient method for the direct oxidative amination of benzoxazoles using heterocyclic ionic liquid as catalyst has been developed. The reaction proceeded smoothly at room temperature and gave the desirable 2-aminobenzoxazoles with good to excellent yields (up to 97%). The catalyst 1-butylpyridinium iodide can be easily recycled and reused with similar efficacies for at least four cycles.
一种简便、绿色且高效的方法已被开发,用于使用杂环离子液体作为催化剂直接氧化胺化苯并噁唑。反应在室温下顺利进行,并得到理想的2-氨基苯并噁唑,产率良好到优秀(最高可达97%)。催化剂四丁基吡啶碘化物可以方便地回收并重复使用,至少可维持四个循环的相似效果。