The Synthesis of 2-Aminobenzoxazoles Using Reusable Ionic Liquid as a Green Catalyst under Mild Conditions
Ya Zhou,
Zhiqing Liu,
Tingting Yuan,
Jianbin Huang,
Chenjiang Liu
Affiliations
Ya Zhou
School of Chemistry and Chemical Engineering, Xinjiang University and Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Urumqi 830046, China
Zhiqing Liu
School of Chemistry and Chemical Engineering, Xinjiang University and Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Urumqi 830046, China
Tingting Yuan
School of Chemistry and Chemical Engineering, Xinjiang University and Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Urumqi 830046, China
Jianbin Huang
School of Chemistry and Chemical Engineering, Xinjiang University and Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Urumqi 830046, China
Chenjiang Liu
School of Chemistry and Chemical Engineering, Xinjiang University and Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Urumqi 830046, China
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.
