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.