Journal
TETRAHEDRON LETTERS
Volume 47, Issue 49, Pages 8761-8764Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2006.10.006
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We describe here the first example in which a 1,2,3-triazole ring acts as a diene towards DMAD in microwave-assisted solvent-free Diels-Alder cycloadditions. The extrusion of a molecule of a nitrile affords pyrazole derivatives as the products. The yields can be markedly increased by using a recyclable supported Lewis acid catalyst, which can be reused at least five times without a decrease in the yield. (c) 2006 Elsevier Ltd. All rights reserved.
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