Wu, Zhuoxiong; Yu, Hui published an article in 2022. The article was titled 《Synthesis of (E)-α-chloromethyl vinyl sulfones by 1, 2-radical difunctionalization of allenes with sodium sulfinates and iron(III) chloride hexahydrate》, and you may find the article in Tetrahedron Letters.Formula: C4H3ClO2S2 The information in the text is summarized as follows:
An efficient radical chlorosulfonylation of allenes was disclosed and vinylsulfones were prepared smoothly under mild conditions. By using sodium sulfinates as radical precursors, iron(III) chloride hexahydrate (FeCl3.6H2O) as oxidant and chloride source, allenes were converted into (E)-α-chloromethyl vinylsulfones I [R = Me, Ph, 4-FC6H4, etc., R1 = Ph, R2 = H, X = Cl, Br; R = Ph, R1 = 2-MeC6H4, 4-FC6H4, 4-ClC6H4, etc., R2 = H, Me, X = Cl] via regioselective 1,2-radical difunctionalization process in moderate to good yields. In addition to this study using Thiophene-2-sulfonyl chloride, there are many other studies that have used Thiophene-2-sulfonyl chloride(cas: 16629-19-9Formula: C4H3ClO2S2) was used in this study.
Thiophene-2-sulfonyl chloride(cas: 16629-19-9) is a member of sulfonyl chlorides. Sulfonyl chlorides are reactive sulfonic acid derivatives similar in properties and reactivity to acid chlorides of carboxylates. The sulfonic acid group, however, is a highly hindered molecule, containing a tetrahedral configuration of substituents. Formula: C4H3ClO2S2
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics