The author of 《Non-directed copper-catalyzed regioselective C-H sulfonylation of phenothiazines》 were Liu, Caiyan; Shen, Yongli; Yuan, Kedong. And the article was published in Organic & Biomolecular Chemistry in 2019. Name: 4-Chlorobenzenesulfonyl chloride The author mentioned the following in the article:
A simple and general method for the synthesis of phenothiazinyl sulfones I [R = n-Bu, Ph, Bn, etc.; R1 = cyclopropyl, 4-MeC6H4, 2-naphthyl, etc.; R2 = H, SMe, Cl; R3 = H, Cl] was developed via copper-catalyzed regioselective C-H sulfonylation of phenothiazines with sulfonyl chlorides. The broad scope of aryl/alkyl sulfonyl chlorides was applicable to produce C3 sulfonylation products of phenothiazines in moderate to good yields. The further transformation of the sulfonylation products was successful, which afforded valuable polyheterocycles. The experimental part of the paper was very detailed, including the reaction process of 4-Chlorobenzenesulfonyl chloride(cas: 98-60-2Name: 4-Chlorobenzenesulfonyl chloride)
4-Chlorobenzenesulfonyl chloride(cas: 98-60-2) belongs to organochlorine compounds. The wide structural variety and divergent chemical properties of organochlorides lead to a broad range of names, applications, and properties. Organochlorine compounds have wide use in many applications, though some are of profound environmental concern, with TCDD being one of the most notorious.Name: 4-Chlorobenzenesulfonyl chloride
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics