Synthesis of acid dyes derived from 2-aminothiazoles and their dyeing performance on wool and silk fabrics was written by Iyun, O. R. A.;Bello, K. A.;Jauro, A.. And the article was included in Journal of Chemical Society of Nigeria in 2012.Synthetic Route of C15H12N2S This article mentions the following:
Monoazo acid dyes based on 2-aminoheterocycles were prepared using J-, Nevile and Winther’s-, and H-acids with 4-sulfonic-phenyl-3-methyl-5-pyrazolone as the coupling components. The synthesized dyes were applied on wool and silk fabrics. The dyes were found to give a wide range of color shades with very good depth, brightness, and levelness. The visible absorption spectra and phys. properties of the dyes were also investigated. The percentage dyebath exhaustion on the fabrics was found to be excellent and the dyed fabrics showed very good fastness to light and washing. In the experiment, the researchers used many compounds, for example, 4,5-Diphenylthiazol-2-amine (cas: 6318-74-7Synthetic Route of C15H12N2S).
4,5-Diphenylthiazol-2-amine (cas: 6318-74-7) belongs to thiazole derivatives. The higher aromaticity of thiazole is due to delocalization of a lone pair of sulfur electrons across the ring, which is evidenced by chemical shifts of ring hydrogen at δ 7.27 and 8.77 ppm (C2 and C4), indicating diamagnetic ring current. Electrophilic attack at nitrogen depends on the presence of electron density at nitrogen as well as the position and nature of substituent linked to the thiazole ring.Synthetic Route of C15H12N2S
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica