Studies on Synthesis and Application of Stilbene Dyes

A series of 4-(2-phenyl-4-oxo-3-quinazolinyl)-[4’-(4-aryalazo)-phenyl]-stilbene-2, 2’-disulfonic acid derivatives (3) have been obtained by reaction of various coupling agents (a-o) with diazonium salt containing 4-oxo-quinazolin moiety (2). The diazonium salt (2) is obtained by the reaction of 4-(2- phenyl-4-oxo-3-quinazolinyl)-4’-aminostilbene-2, 2’-disulfonic acid with NaNO2 and HCl. The newly synthesized molecules have been characterized by spectral and analytical techniques. The synthesized molecule exhibit good dyeing characteristics.