Chin. J. Org. Chem. ›› 2013, Vol. 33 ›› Issue (11): 2417-2422.DOI: 10.6023/cjoc201305012 Previous Articles     Next Articles

Notes

离子液体1-甲基咪唑硫酸氢盐催化合成取代吡咯衍生物

吴长春a, 臧洪俊a, 李大庆a, 於年琴a, 程博闻a, 于楷b   

  1. a 天津工业大学环境与化学工程学院 天津改性与功能纤维重点实验室 天津 300387;
    b 铁岭港华燃气有限公司 铁岭 112002
  • 收稿日期:2013-05-13 修回日期:2013-07-06 发布日期:2013-07-19
  • 通讯作者: 臧洪俊 E-mail:chemhong@126.com
  • 基金资助:

    天津市自然科学基金(No. 11JCZDJC21300)资助项目.

1-Methylimidazolium Hydrogen Sulfate: An Efficient Catalyst for the Synthesis of Substituted Pyrroles

Wu Changchuna, Zang Hongjuna, Li Daqinga, Yu Nianqina, Cheng Bowena, Yu Kaib   

  1. a Department of Environmental and Chemistry Engineering, Tianjin Polytechnic University, Tianjin 300387;
    b Ganghua Gas Limited Company, Tieling 112002
  • Received:2013-05-13 Revised:2013-07-06 Published:2013-07-19
  • Supported by:

    Project supported by the Natural Science Foundation of Tianjin City (No. 11JCZDJC21300).

Using ionic liquid [HMIM]HSO4 as a eco-friendly catalyst, a variety of N-substituted pyrroles were synthesized by the reaction of 2, 5-hexanedione and primary amines in methanol at reflux. The new compounds were characterized by 1H NMR, FT-IR, mass spectra and elemental analysis. The influence of different catalysts and catalyst loading were investigated, and the optimal reaction conditions were then obtained. A possible mechanism was also proposed. Furthermore, the recycling experiment of the catalyst was conducted and the green catalytic system can be recycled for several times with no decreases in yields and reaction rates. The present methodology offers several advantages such as mild conditions, short reaction time, excellent yields, and recyclable catalyst.

Key words: pyrroles, ionic liquid, 2,5-hexanedione, amine, eco-friendly catalyst