期刊论文详细信息
Journal of Chemical Sciences | |
Highly efficient solvent-free synthesis of pyranopyrazoles by a Brønsted-acidic ionic liquid as a green and reusable catalyst | |
Esan Bahramzade2  Javad Ebrahimi13  Amir Habibi1  Ali Mohammadi24  Vahid Pakjoo1  | |
[1] Department of Chemistry, Islamic Azad University, Mashhad Branch, P.O. Box 9187147578, Mashhad, Iran$$;Department of Chemistry, Islamic Azad University, Mashhad Branch, P.O. Box 9187147578, Mashhad, Iranv$$;Young Researchers Club, Islamic Azad University, Mashhad Branch, P.O. Box 9187147578, Mashhad, Iran$$;Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, P.O. Box 91775, Mashhad, Iran$$ | |
关键词: Pyranopyrazoles; solvent-free synthesis; multicomponent reaction; ionic liquid; heterogeneous catalysts.; | |
DOI : | |
来源: Indian Academy of Sciences | |
【 摘 要 】
A simple, green and efficient protocol for synthesis of dihydropyrano[2,3-c]pyrazole derivatives is developed by a four component reaction of various benzaldehydes, ethyl acetoacetate, hydrazine hydrate and malononitrile in the presence of 3-methyl-1-(4-sulphonic acid)butylimidazolium hydrogen sulphate [(CH2)4SO3HMIM][HSO4], an acidic ionic liquid and as a catalyst, under solvent-free conditions. The key advantages of this process are high yields, shorter reaction times, easy work-up, purification of products by non-chromatographic method and the reusability of the catalyst.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912040508432ZK.pdf | 147KB | download |