Synthesis Of A New And FirstTriazadibenzo[A,N]Triphenodithiazine

Abstract

A new angular triazadibenzo[a,n]triphenodithiazine is synthesized and characterized by spectroscopic methods. The new compound 1,15,17-triazadibenzo[a,n]triphenodithiazine-5,11-dione was obtained by base catalyzed condensation reaction of 2,6-diaminopyridine-3,5-dithiol with 7-chloro-5,8-dioxoquinoline in anhydrous sodium carbonate. 2,6-diaminopyridine-3,5-dithiol was prepared by alkaline hydrolysis of 2,6-diamino-3,5-dithiacyanopyridine in 40% KOH solution while 7-chloro-5,8-dioxoquinoline was prepared by 4 reaction steps conversion of 8-hydroxyquinoline to 5-amino-7-chloro-8-hydroxyquinoline which was subsequently oxidized with acidified potassium dichromate.

Keywords: 2,6-Diaminopyridine-3,5-dithiol, 7-Chloro-5,8-dioxoquinoline, anhydrous sodium carbonate, alkaline hydrolysis, condensation reaction.