Palladium-Catalyzed Direct Arylation of Methyl Sulfoxides with Aryl Halides
作者:Tiezheng Jia、Ana Bellomo、Kawtar EL Baina、Spencer D. Dreher、Patrick J. Walsh
DOI:10.1021/ja4009776
日期:2013.3.13
The palladium-catalyzed α-arylation of unactivated sulfoxides has been developed. The weakly acidic α-protons of sulfoxides are reversibly deprotonated by LiOtBu, and a palladium phosphine complex facilitates the arylation. A variety of aryl methyl sulfoxides were coupled with arylbromides. More challenging coupling partners, such as alkyl methyl sulfoxides (including dimethyl sulfoxide) and aryl chlorides
Copper-Catalyzed Sulfinyl Cross-Coupling Reaction of Sulfinamides
作者:Mengting Kou、Ziqiang Wei、Zhen Li、Bin Xu
DOI:10.1021/acs.orglett.2c03414
日期:2022.11.25
A copper-catalyzed sulfinyl cross-coupling reaction of sulfinamides with aldehyde-derived N-tosylhydrazones is described. This approach enables facile access for the construction of structurally diverse sulfoxides via novel and efficient S–N/S–Cbond interconversions, features broad substrate scope, and accommodates various functional groups as well as pharmacophores. Moreover, the given sulfinyl cross-coupling
Copper-catalyzed asymmetric sulfoxidation of aryl benzyl and aryl alkyl sulfides, using aqueous hydrogen peroxide as the oxidant, has been investigated. A relationship between the steric effects of the sulfide substituents and the enantioselectivity of the oxidation has been observed, with up to 93% ee for 2-naphthylmethyl phenyl sulfoxide, in modest yield in this instance (up to 30%). The influence
Palladium-Catalyzed Double CH Activation Directed by Sulfoxides in the Synthesis of Dibenzothiophenes
作者:Rajarshi Samanta、Andrey P. Antonchick
DOI:10.1002/anie.201100775
日期:2011.5.23
SO shows where to go: A novel double CH activation of aromatic compounds with a sulfoxide as a directing group results in the highly regioselective synthesis of polysubstituted dibenzothiophenes (see scheme). The reaction cascade consists of palladium‐catalyzed double CH activation and a Pummerer rearrangement followed by palladium‐catalyzedCS bond formation.