1-Methylimidazolium hydrogen sulfate catalyzed convenient synthesis of 2,5-dimethyl-N-substituted pyrroles under ultrasonic irradiation

Daqing Li; Hongjun Zang; Changchun Wu; NianQin Yu

doi:10.1016/j.ultsonch.2013.01.019

1-Methylimidazolium hydrogen sulfate catalyzed convenient synthesis of 2,5-dimethyl-N-substituted pyrroles under ultrasonic irradiation

Ultrason Sonochem. 2013 Sep;20(5):1144-8. doi: 10.1016/j.ultsonch.2013.01.019. Epub 2013 Feb 10.

Authors

Daqing Li¹, Hongjun Zang, Changchun Wu, NianQin Yu

Affiliation

¹ Department of Environmental and Chemistry Engineering, Tianjin Polytechnic University, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, 300160 Tianjin, China.

PMID: 23485559
DOI: 10.1016/j.ultsonch.2013.01.019

Abstract

Ionic liquid [HMIM]HSO4 was found to be an efficient catalyst for the synthesis of N-substituted pyrroles through the reaction of 2,5-hexanedione with amines under ultrasonic irradiation at room temperature. These reactions proceed with good yields under short reaction time. Furthermore, the green catalytic system can be recycled specific times with no decreases in yields and reaction rates.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Catalysis
Imidazoles / chemistry*
Molecular Structure
Pyrroles / chemical synthesis*
Pyrroles / chemistry
Sonication*

Substances

Imidazoles
Pyrroles
1-methylimidazole