Ionization constants of 5- and 6-substituted benzothiazolones was written by Antonova, A.;Simov, D.. And the article was included in Monatshefte fuer Chemie in 1976.Name: 6-Chlorobenzo[d]thiazol-2(3H)-one This article mentions the following:
The ionization constants of benzothiazolone and its 5- and 6-substituted derivatives in 20 volume% EtOH are determined spectrophotometrically. The influence of the polar effects of the substituents on the ionization of the benzothiazolone is due mainly to the induction effect, confirmed by the correlation between exptl. pKa values and the Taft σ0-constants of the substituents. In the experiment, the researchers used many compounds, for example, 6-Chlorobenzo[d]thiazol-2(3H)-one (cas: 62266-81-3Name: 6-Chlorobenzo[d]thiazol-2(3H)-one).
6-Chlorobenzo[d]thiazol-2(3H)-one (cas: 62266-81-3) belongs to thiazole derivatives. The thiazole ring has been identified as a central feature of numerous natural products, perhaps the most famous example of which is epothilone. Thiazole sulfonation occurs only under forcing conditions: the action of oleum at 250 °C for 3 hours in the presence of mercury(II) sulfate leads to 65% formation of 5-thiazole sulfonic acid.Name: 6-Chlorobenzo[d]thiazol-2(3H)-one
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica