In 2022,Khamis, Noha; Clarkson, Guy J.; Wills, Martin published an article in Dalton Transactions. The title of the article was 《Heterocycle-containing Noyori-Ikariya catalysts for asymmetric transfer hydrogenation of ketones》.Formula: C4H3ClO2S2 The author mentioned the following in the article:
Synthesis of a range of N-(heterocyclesulfonyl)-functionalized Noyori-Ikariya catalysts was described. These complexes were prepared through a short sequence starting from C2-sym. 1,2-diphenylethylene-1,2-diamine and were characterized by a range of methods including X-ray crystallog. These complexes were active catalysts for the asym. transfer hydrogenation of a range of ketones to afford alcs. RCHOHR1 [R = Ph, 4-ClC6H4, 2-thienyl, etc.; R1 = Me, CH2Cl, CH2Ph] with high ee in most cases and notably good results for ortho-substituted acetophenones. In the part of experimental materials, we found many familiar compounds, such as Thiophene-2-sulfonyl chloride(cas: 16629-19-9Formula: C4H3ClO2S2)
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