Journal
TETRAHEDRON LETTERS
Volume 53, Issue 18, Pages 2345-2351Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2012.02.114
Keywords
Multicomponent reaction; 3-Aminocoumarin; Cyclic 1,3-dicarbonyl compounds; Aromatic aldehydes; p-Toluenesulfonic (p-TSA); Chromeno[3,4-b]quinoline derivatives
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Funding
- IIT Guwahati
- Department of Science and Technology, New Delhi
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One-pot synthesis of chromeno[3,4-b]quinoline derivatives have been achieved in good yields through Michael Initiated Ring Closure (MIRC) by employing three-component condensation of aromatic aldehydes, 3-aminocoumarins, and cyclic 1,3-diketones in the presence of catalytic amount of p-toluenesulfonic (p-TSA) acid in ethanol under reflux condition. The salient features of this protocol are: simple reaction procedure, shorter reaction time, good yields, avoidance of aqueous work-up, and column-chromatographic separation. The merit of this process is highlighted by its high bond efficiency of producing three new bonds and one stereocenter in a single operation. (C) 2012 Elsevier Ltd. All rights reserved.
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