Journal
TETRAHEDRON
Volume 66, Issue 1, Pages 146-151Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2009.11.039
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6,7-Dialkynyl-1,3-dimethylpteridine-2,4(1H,3H)-diones and 2,3-dialkynylquinoxalines have been shown to react with sodium azide in DMF at room temperature giving rise 9,11-dimethyl- [1,2,3]triazolo[1',5';1,2]pyrido[4,3-g]pteridine-8,10(9H,11H)-diones and [1,2,3]triazolol[1',5';1,2]pyrido[3,4-b]quinoxalines. A novel tandem cyclization involves 1,3-dipolar cycloaddition of an azide ion to the carbon-carbon triple bond followed by intramolecular nucleophilic addition of the intermediate 1,2,3-triazole N-anion to another C C bond. (C) 2009 Elsevier Ltd. All rights reserved.
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