1H-1,2,4-Triazolo-5-diazonium Salts in the Synthesis of New 6H-Benzopyrano[4,3-e][1,2,4]triazolo[5,1-c][1,2,4]triazin-6-ones and [1,2,4]Triazolo[5',1':3,4][1,2,4]triazino[6,5-c]quinolin-6(7H)-ones

Abstract

A convenient approach to the synthesis of new 2-R-6H-benzopyrano[4,3-е][1,2,4]triazolo[5,1-c][1,2,4]triazin-6-ones and 2-R-[1,2,4]triazolo[5',1':3,4][1,2,4]triazino[6,5-c]quinolin-6(7H)-ones, based on the condensation of 3-R-1H-1,2,4-triazolo-5-diazonium salts with 2H-1-benzopyran-2,4(3H)-dione and quinoline-2,4(1H,3H)-dione, is developed.