THE MOLECULAR DESIGN AND OPTICAL CHARACTERISATION OF SOME NOVEL CONDENSED AND BRIDGE HEAD HETEROCYCLIC QUINONE DYES

Abstract

First senes of novel unsymmetrical condensed heterocyclic quinone dyes and related cyanine analogous incorporating naphth [2,3 -b] pyrazol (isoxazole) or (pyrimidine); 2-metalo naphth [2,3-b]-1 ,3 -oxa (thia) zine; uni(bi) nuclear naphth (2,3-b) thiazole (thiadiazine)-4,9 (5, I 0)­ dione; thia (oxa) zolo [2,3-b] benz (pyrid) oxazine [2,3-b] heterocyclic quinone, N-phenyl oxazolo [2,3-b] benzoxazine [2', 31 -b1]-4,11 -dione, N-phenyl pyrazolo (2, 3-b) oxazine-1,4

(benzoxazine) covering mono 3 [4(1)], 4 (4), 2(2), 2 (4) methine, azamethine, bis mono 2,2 (4,4) methine, tri-3 [2(4)] methine, meso substituted tri-2[2(4)] methine, 6-styryl cyanines were prepared.