Zhou, Nengneng; Kuang, Kaimo; Wu, Meixia; Wu, Sixin; Xia, Ziqin; Xu, Qiankun; Zhang, Man published their research in Organic Chemistry Frontiers in 2021. The article was titled 《Visible-light-induced radical cascade cyclization of 1-(allyloxy)-2-(1-arylvinyl)benzenes with sulfonyl chlorides for the synthesis of sulfonated benzoxepines》.SDS of cas: 16629-19-9 The article contains the following contents:
A visible light photocatalyzed cascade sulfonylation/cyclization of 1-(allyloxy)-2-(1-arylvinyl)benzenes I (X = O; R1 = H, 4-F, 5-Me, 3,4-benzo, etc.; R2 = Ph, 2-MeC6H4, 4-BrC6H4, etc.; R3 = H, Me) and their analogs I (X = CH2, NTs; R1 = R3 = H; R2 = Ph) with sulfonyl chlorides R4SO2Cl (R4 = Me, cyclopropyl, 4-MeC6H4, 1-naphthyl, 2-thienyl, etc.) for the construction of sulfonated benzoxepines and analogs II has been developed. In the presence of Eosin Y (2.0 mol%) as a photocatalyst and Na2CO3 as a base, the reactions proceed smoothly to afford seven-membered rings in good yields. This transformation features wide substrate scope, the use of easily accessible materials and excellent functional group tolerance. After reading the article, we found that the author used Thiophene-2-sulfonyl chloride(cas: 16629-19-9SDS of cas: 16629-19-9)
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. SDS of cas: 16629-19-9
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics