New syntheses of 4(5)-aryl-5(4)-(2-chromonyl)-1,2,3-triazoles from 2-styrylchromones and sodium azide

Authors
Silva, AMS Vieira, JS Cavaleiro, JAS Patonay, T Levai, A Elguero, J
Citation
Ams. Silva et al., New syntheses of 4(5)-aryl-5(4)-(2-chromonyl)-1,2,3-triazoles from 2-styrylchromones and sodium azide, HETEROCYCLE, 51(3), 1999, pp. 481-487
Citations number
8
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
HETEROCYCLES
ISSN journal
03855414 → ACNP
Volume
51
Issue
3
Year of publication
1999
Pages
481 - 487
Database
ISI
SICI code
0385-5414(19990301)51:3<481:NSO4F2>2.0.ZU;2-F
Abstract
The reactions of 2-alpha-bromostyrylchromones or 2-styrylchromones with sod ium azide afforded 4(5)-aryl-5(4)-(2-chromonyl)-1,2,3-triazoles. In the cas e of 2-alpha-bromostyrylchromones, the unexpected 1-aryl-5-(2-chromonylmeth yl)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.