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Research on Chemical Intermediates

, Volume 42, Issue 3, pp 2035–2045 | Cite as

Reusable proline-based ionic liquid catalyst for the simple synthesis of 2-arylbenzothiazoles in a biomass medium

  • Zhi-Yu Yu
  • Qiu-Sheng Fang
  • Jia Zhou
  • Zhi-Bin SongEmail author
Article

Abstract

A simple, efficient, and eco-friendly aerobic procedure for synthesis of 2-substituted benzothiazoles catalyzed by facile prepared [N2222][Pro] in a biomass medium (ethyl lactate) has been developed. The reactions afford the target 2-arylbenzothiazoles in good to excellent yields (>80 %) under air condition and was observed without use of chromatography. In addition, this proline-based ionic liquid catalyst can be easily recycled six times without loss of catalytic activity in gram scale synthesis.

Keywords

Ionic liquids Amino acid 2-Arylbenzothiazoles Aerobic condensation 

Notes

Acknowledgments

This work is supported by the Department of Education of Jiangxi Province and Key Laboratory of Functional Small Organic Molecules, Ministry of Education (No. GJJ13214, KLFS-KF-201229).

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Zhi-Yu Yu
    • 1
  • Qiu-Sheng Fang
    • 1
  • Jia Zhou
    • 1
  • Zhi-Bin Song
    • 1
    Email author
  1. 1.Key Laboratory of Functional Small Organic Molecules, Ministry of Education, College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchangPeople’s Republic of China

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