Ammonium iodide-induced sulfonylation of alkenes with DMSO and water toward the synthesis of vinyl methyl sulfones
作者:Xiaofang Gao、Xiaojun Pan、Jian Gao、Huawen Huang、Gaoqing Yuan、Yingwei Li
DOI:10.1039/c4cc07606k
日期:——
A novel ammonium iodide-induced sulfonylation of alkenes with DMSO and water toward the synthesis of vinyl methylsulfones is described. The process proceeded smoothly under metal-free conditions with high stereoselectivity and good functional group tolerance. The reaction mechanism was revealed to proceed through a domino reaction of oxidation and elimination after the radical addition to alkenes
Sulfonylative alkoxyhydroxylation of 2-arylpropenes
作者:Huei-Sin Wang、Yan-Shin Wu、Meng-Yang Chang
DOI:10.1016/j.tet.2017.09.047
日期:2017.11
2-arylpropenes 1 affords oxygenated sulfonylcumenes 4 in moderate yields via a sequential route: (i) NBS-mediated allylic bromination of 2-arylpropenes 1 in CH2Cl2, (ii) sodium sulfinates 2-promoted nucleophilic substitution of the resulting styryl bromides in a co-solvent of alcohol and water, and (iii) V2O5/H2O2 mediated alkoxyhydroxylation of corresponding styryl sulfones 3 in alcohol. The synthetic route provides
一键式三步合成2-芳基丙烯1的磺酰化烷氧基羟基化反应可通过以下顺序以中等收率得到含氧的磺酰基枯烯4:(i)NBS介导的CH 2 Cl 2中2-芳基丙烯1的烯丙基溴化,(ii)亚磺酸钠2醇和水的共溶剂中苯乙烯基溴化物的亲核取代反应得到促进;以及(iii)V 2 O 5 / H 2 O 2介导的相应苯乙烯基砜3的烷氧基羟化反应在酒精中。合成路线通过两个碳-氧和一个碳-硫键的形成为2-芳基丙烯1的1,2,3-三氟官能化提供了高效的方法。
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
Copper-Catalyzed Decarboxylative Functionalization of Conjugated β,γ-Unsaturated Carboxylic Acids
作者:Wei Zhang、Chengming Wang、Qiu Wang
DOI:10.1021/acscatal.0c03621
日期:2020.11.20
Copper-catalyzed decarboxylative coupling reactions of conjugated β,γ-unsaturated carboxylic acids have been achieved for allylic amination, alkylation, sulfonylation, and phosphinoylation. This approach was effective for a broad scope of amino, alkyl, sulfonyl, and phosphinoyl radical precursors as well as various conjugated β,γ-unsaturated carboxylic acids. These reactions also feature high regioselectivity
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...