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Communication | Regular issue | Vol 51, No. 3, 1999, pp.481-487
Published online, 1st January, 1970
DOI: 10.3987/COM-98-8423
New Syntheses of 4(5)-Aryl-5(4)-(2-chromonyl)-1,2,3-triazoles from 2-Styrylchromones and Sodium Azide

Artur M. S. Silva,* Judite S. Vieira, José A. S. Cavaleiro, Tamás Patonay, Albert Lévai, and José Elguero

*Department of Chemistry, Universit y of Aveiro, 3810 Aveiro, Portugal

Abstract

The reactions of 2-α-bromostyrylchromones or 2-styrylchromones with sodium azide afforded 4(5)-aryl-5(4)-(2-chromonyl)-1,2,3-triazoles. In the case of 2-α-bromostyrylchromones, the unexpected 1-aryl-5-(2-chromonylmethyl)tetrazoles have been obtained as minor products and the mechanism of its formation is discussed. The bromination/dehydrobromination reactions of 2-styrylchromones were also studied.