Disperse dyes' derivatives from compact condensed system 2-aminothiazolo[5,4-c]pyridine: Synthesis and characterization

This paper presents the synthesis of new disperse dyes' derivatives from compact condensed system 2-aminothiazolo[5,4-c]pyridine. These dyes have been characterized by elemental analysis, melting points, IR, UV–VIS and NMR spectroscopic methods. The separation and purification of synthesized compounds by TLC and HPLC methods are also presented. The tinctorial properties of obtained disperse dyes were tested upon some polyacrylic fibres by painting. A large scale of full-bodied brightness shadow was obtained, generally based on the nature of diazotized amine. The resulting paintings have very good fastness to wet treatments. The fastness to light is dependent on the structure of diazo thermal fastness by coupling agent. The relationships between chemical structures of disperse dyes and perspiration/light fastness are discussed.