期刊
TETRAHEDRON LETTERS
卷 53, 期 35, 页码 4687-4691出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2012.06.086
关键词
Nano structured ZnO; 4H-Pyrans; 3,4-Dihydropyridin-2-one; Organic acid catalyzed rearrangement
资金
- University of Calcutta
- CSIR, New Delhi, India [09/028(0768)/2010]
- UGC
- DST-FIST, India
A green and highly efficient protocol has been developed for the synthesis of 4H-pyran scaffolds installing a one-pot three-component coupling reaction of an aldehyde, malononitrile, and a 1,3-diketo compound using nano structured ZnO as the catalyst in aqueous alcoholic medium. A greener method to synthesize 3,4-dihydropyridin-2-one has also been developed by rearranging 4H-pyran derivatives in aqueous medium applying p-TSOH as the right catalyst source. A wide spectrum of functional groups was tolerated in both the developed synthetic protocols with good to excellent yield of the targeted molecules. (c) 2012 Elsevier Ltd. All rights reserved.
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