Synthesis and spectral characterization of some new azo benzothiazole derivative and relative compounds

Abstract

A series of azo benzothiazole derivatives (2a–m) were prepared by coupling of the appropriate arylamine diazonium salts with 2-(benzo[d]thiazole-2-yl)-3-oxo-pentadinitriles (1). Also, the cyclization of azo derivatives (2d, 2h) with malononitrile in refluxing DMF afforded pyridazine carbonitrile derivatives (3a,b). Moreover, the azo derivatives (2a–m) underwent cyclization on refluxing in DMF to afford pyridazine derivatives (6a–m). All the newly synthesized compounds were characterized by both analytical and spectral analyses. Dyeing performance of the synthesized dyes on polyester fibers has been assessed. Most of the dyes showed good affinity to polyester fibers. No details regarding the synthesis and dyeing performance of such dyes are reported before in the literature.

Keywords:

• Dyes
• polyester
• benzothiazole
• chemical reactions
• dyes performance