Synthesis and investigations of the absorption spectra of hetarylazo disperse dyes derived from 2,4-quinolinediol was written by Sener, Izzet;Karci, Fikret;Ertan, Nermin;Kilic, Emine. And the article was included in Dyes and Pigments in 2005.Synthetic Route of C4H6N2S This article mentions the following:
Synthesis of 9 hetarylazoquinoline dyes was achieved by diazotization of nine heterocyclic amines using nitrosyl sulfuric acid and then coupling with 2,4-quinolinediol. These dyes were characterized by UV-visible, FT-IR, and 1H NMR spectroscopic techniques and elemental anal. Visible absorption spectra of the dyes are discussed in terms of the effects of varying pH and solvent on the absorption ability of azoquinolines. The colors of the dyes were discussed with respect to the nature of the heterocyclic ring and to the substituents thereon. Temperature and concentration effects on the visible absorption maxima of the dyes are also reported. In the experiment, the researchers used many compounds, for example, 2-Methylthiazol-5-amine (cas: 89281-44-7Synthetic Route of C4H6N2S).
2-Methylthiazol-5-amine (cas: 89281-44-7) belongs to thiazole derivatives. Thiazoles are a class of five-membered rings containing nitrogen and sulfur with excellent antitumor, antiviral and antibiotic activities. There are numerous natural products that possess a thiazole ring with broad pharmacological activities. Thiamine, also known as vitamin B1, possesses a thiazole ring linked with 2-methylpyrimidine-4-amine as hydrochloride salt.Synthetic Route of C4H6N2S
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica