The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Synthesis of heterocyclic compounds of nitrogen. XXI. 2-Chloro-6-nitrobenzothiazole》. Authors are Takahashi, Torizo; Taniyama, Hyozo.The article about the compound:2-Chloro-6-nitrobenzo[d]thiazolecas:2407-11-6,SMILESS:O=[N+](C1=CC=C2N=C(Cl)SC2=C1)[O-]).Safety of 2-Chloro-6-nitrobenzo[d]thiazole. Through the article, more information about this compound (cas:2407-11-6) is conveyed.
The NO2 group in 1 isomer of nitro-2-mercaptobenzothiazole (I), obtained by the nitration of 2-mercaptobenzothiazole, was proved to be at the 6-position by the following method. I with PCl5 and POCl3 gave nitro-2-chlorobenzothiazole (II), yellow needles, m. 190-1°. 2-Amino-6-nitrobenzothiazole, yellow needles, m. 245°, was prepared from p-nitroaniline, (NH4)2SCN, and Br, diazotized and decomposed to 2-chloro-6-nitrobenzothiazole, yellow needles, m. 189-90°, identical with II; it can be concluded that I was 2-mercapto-6-nitrobenzothiazole. II can also be obtained by the nitration of 2-chlorobenzothiazole.
Compound(2407-11-6)Safety of 2-Chloro-6-nitrobenzo[d]thiazole received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(2-Chloro-6-nitrobenzo[d]thiazole), if you are interested, you can check out my other related articles.
Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI