COA of Formula: C4H3ClO2S2In 2022 ,《Visible-Light-Catalyzed Tandem Radical Addition/1,5-Hydrogen Atom Transfer/Cyclization of 2-Alkynylarylethers with Sulfonyl Chlorides》 was published in Organic Letters. The article was written by Li, Long; Li, Jiao-Zhe; Sun, Yong-Bin; Luo, Chun-Mei; Qiu, Hui; Tang, Keqi; Liu, Hongxin; Wei, Wen-Ting. The article contains the following contents:
A novel visible-light-catalyzed tandem radical addition/1,5-hydrogen atom transfer/cyclization cascade of 2-alkynylarylethers 2-(CHC)-3-R-4-R1-C6H2OCH(R2)R3 (R = H, Me, Cl, C(O)OMe, etc.; R1 = H, C(O)OMe; R2 = Me, Et, Ph; R3 = Me, Et; R2R3 = -(CH2)5-, -(CH2)4-, -(CH2)3OCH2-) with sulfonyl chlorides R4S(O)2Cl (R4 = Ph, 4-bromophenyl, 4-methylphenyl, 4-methoxyphenyl, thiophen-2-yl) in 2-methyltetrahydrofuran was developed under photocatalyst- and additive-free conditions. This reaction relies on unique energy transfer and solvent-radical relay strategies to generate sulfonyl radicals for the preparation of a series of sulfonyl-functionalized dihydrobenzofurans I in moderate to high yields catalyzed by visible light or solar radiation.Thiophene-2-sulfonyl chloride(cas: 16629-19-9COA of Formula: 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. COA of Formula: C4H3ClO2S2
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics