Allyl sulfones construction via copper catalysis from α-methylstyrene derivatives and sulfonyl chlorides
作者:Lixia Liu、Chengming Wang
DOI:10.1016/j.tetlet.2021.153553
日期:2022.1
Allyl sulfones are synthesized via Cu-catalyzed ligand-free regioselective sulfonylation reaction from easily obtained α-methylstyrene derivatives and sulfonyl chlorides. This redox-neutral protocol also features a low-cost metal catalyst, broad substrate scope, good functional group tolerance and could be smoothly amplified to a gram scale. The allylic sulfone products can be used in diverse radical
Sodium arylsulfinates are treated with manganese(III) 2-pyridinecarboxylate or cerium(IV) tetrabutylammonium nitrate to generate sulfonyl radicals, which react with various olefins giving the addition products.
Sulfonylation and Phosphinylation of Olefinic Compounds with Radical Species Generated by the Oxidation of Sodium Sulfinates and Diphenylphosphine Oxide
Sodiumarenesulfinates are oxidized with manganese(III) 2-pyridinecarboxylate or ammonium cerium(IV) nitrates to generate sulfonyl radicals, which add to olefinic compounds to afford sulfonylated products in good yield. When 1-vinyl cyclic alcohols are used as sulfonyl radical acceptors, sulfonylation proceeds with ring-enlargement. Diphenylphosphinyl radical can also be generated by treating diphenylphosphine
Visible-light induced oxidant-free oxidative cross-coupling for constructing allylic sulfones from olefins and sulfinic acids
作者:Guoting Zhang、Lingling Zhang、Hong Yi、Yi Luo、Xiaotian Qi、Chen-Ho Tung、Li-Zhu Wu、Aiwen Lei
DOI:10.1039/c6cc04109d
日期:——
An oxidant-free dehydrogenative sulfonylation of [small alpha]-methyl-styrene derivatives was developed for the construction of allylic sulfones by using eosin Y as a photosensitizer in conjunction with a cobaloxime catalyst. The process...
KI-Catalyzed Allylic Sulfonation of α-Methylstyrene Derivatives with Sulfonylhydrazides via Electrochemistry
作者:Xinghua Zhang、Shuang Xu、Xiang Yang、Wan Pang
DOI:10.1021/acs.joc.3c00147
日期:2023.6.2
A direct allylic C–H bond activation of α-methylstyrene derivatives with sulfonylhydrazines for the synthesis of allylic sulfones has been developed under exogenous oxidant- and metal-catalyst-free electrochemical conditions. Using the transfer of electrons in the current instead of a stoichiometric chemical oxidant, a series of valuable allylic sulfones were accessed with a wide substrate scope and