In 2022,Xu, Zekun; Jiang, Jun; Lu, Qianqian; Chen, Jingyun; Chen, Shufang; Shi, Liyang; Yimei Zhao published an article in Journal of Organometallic Chemistry. The title of the article was 《Photoredox Catalyzed Sulfonylation of Multisubstituted Allenes with Ru(bpy)3Cl2 or Rhodamine B》.COA of Formula: C6H4Cl2O2S The author mentioned the following in the article:
A highly regio- and stereoselective sulfonylation of allenes was developed that provided direct access to α,β-substituted unsaturated sulfones I [R1 = Ph, 4-ClC6H4, 4-MeC6H4, etc.; R2 = H, Ph; R3 = Ph, 4-MeC6H4, 4-ClC6H4, etc.; R4 = Me, CH2C(O)OEt]. By means of visible-light photoredox catalysis, the free radicals produced by p-toluenesulfonic acid reacted with multisubstituted allenes to obtain Markovnikov-type vinyl sulfones with Ru(bpy)3Cl2 or Rhodamine B as photocatalyst. The yield of this reaction could reach up to 91%. A series of unsaturated sulfones would be used for further transformation to some valuable compounds After reading the article, we found that the author used 4-Chlorobenzenesulfonyl chloride(cas: 98-60-2COA of Formula: C6H4Cl2O2S)
4-Chlorobenzenesulfonyl chloride(cas: 98-60-2) belongs to organochlorine compounds. Alkanes and aryl alkanes may be chlorinated under free radical conditions, with UV light. COA of Formula: C6H4Cl2O2S However, the extent of chlorination is difficult to control. Aryl chlorides may be prepared by the Friedel-Crafts halogenation, using chlorine and a Lewis acid catalyst.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics