Oegretir, Cemil published the artcileDetermination and Evaluation of Acid Dissociation Constants of Some Substituted 2-Aminobenzothiazole Derivatives, Safety of 4-(Naphthalen-1-yl)thiazol-2-amine, the publication is Journal of Chemical & Engineering Data (2008), 53(2), 422-426, database is CAplus.
The acid dissociation constants of some 4- and/or 6-substituted 2-aminobenzothiazole and 4-substituted thiazole derivatives were determined spectroscopically. With the exception of a few, the first protonation was found to occur on the amino group. In some mols. where prototropic tautomerism is possible, a change-over in the protonation mechanism was observed The first protonation under these circumstances was found to occur on the imino nitrogen atom. The second protonation takes place on the thiazole ring nitrogen atom.
Journal of Chemical & Engineering Data published new progress about 56503-96-9. 56503-96-9 belongs to thiazole, auxiliary class Thiazole,Amine,Naphthalene, name is 4-(Naphthalen-1-yl)thiazol-2-amine, and the molecular formula is C13H10N2S, Safety of 4-(Naphthalen-1-yl)thiazol-2-amine.
Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/thiazole,
Thiazole | chemical compound | Britannica