《Insight into catalytic properties of supported palladium nanoparticles catalyzed ortho-directed sulfonylation》 was published in Youji Huaxue in 2020. These research results belong to Li, Pengshuai; Wu, Yun; Bai, Chaolumen; Bao, Yongsheng. Product Details of 16629-19-9 The article mentions the following:
Catalyzed by supported palladium nanoparticles, an ortho-directed sulfonylation reaction between 2-phenylpyridine and arylsulfonyl chlorides has been developed. The full oxidation-state change of palladium was detected in the XPS anal. of the supported palladium nanoparticles catalyst before and after reaction, which confirmed that Pd-catalyzed ortho-directed sulfonylation reaction was performed via a PdII/IV catalytic cycle instead of Pd0/II. The hot filtration test and other tests of catalysts further confirmed the hypothesis. This report afforded the most straightforward approach to confirm the variation of valence of palladium in ortho-directed sulfonylation reaction. In the experimental materials used by the author, we found Thiophene-2-sulfonyl chloride(cas: 16629-19-9Product Details of 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. Product Details of 16629-19-9
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics