Cyclocondensation reactions of heterocyclic carbonyl compounds.. Synthesis of 2,6‐bis(6‐azauracil‐5‐yl)aniline and its use for synthesis of some other polynuclear 1,2,4‐triazines

Abstract

Abstract 5‐(2‐Aminophenyl)‐6‐azauracil 1 was converted to 7‐(6‐azauracil‐5‐yl)isatin 3 , semicarbazone 4 of which was recyclized to 2,6‐bis(6‐azauracil‐5‐yl)aniline 5 . This one served as a starting compound for preparation of other noncondensed two nuclear heterocycles 7, 9, 10 and condensed 1,2,4‐triazines 11 and 12 as well.