Journal
TETRAHEDRON LETTERS
Volume 50, Issue 52, Pages 7300-7303Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2009.10.032
Keywords
Dimedone; Cyclohexane-1.3-dione; Phthalhydrazide; H2SO4; Ionic liquid; Water-ethanol; Indazolophthalazine
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Funding
- CSIR, New Delhi, India
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Sulfuric acid-catalyzed, three-component, one-pot condensation of phthalhydrazide, aromatic aldehydes and 1,3-dicarbonyl compounds has been reported for the synthesis of a series of 2H-indazolo[2,1-b] phthalazine-triones in water-ethanol or in ionic liquid. The protocol proves to be efficient and environmentally benign in terms of high yields, low reaction times, ease of recovery, and reusability of reaction medium (ionic liquid). (C) 2009 Elsevier Ltd. All rights reserved.
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