Visible-light-induced decarboxylative sulfonylation of cinnamic acids with sodium sulfinates by using Merrifield resin supported Rose Bengal as a catalyst
作者:Pinhua Li、Guan-Wu Wang
DOI:10.1039/c9ob00790c
日期:——
decarboxylative sulfonylation of cinnamic acids with sodium sulfinates for the synthesis of vinyl sulfones was developed. The reaction proceeded smoothly in the presence of Merrifield resin supported Rose Bengal ammonium salt as a photocatalyst and tert-butyl hydroperoxide (70% in water) as an oxidant in aqueous DMSO solution at roomtemperature under green LED (530-535 nm) irradiation under an air atmosphere
Electron Donor–Acceptor Complex Enabled Decarboxylative Sulfonylation of Cinnamic Acids under Visible-Light Irradiation
作者:Qian-Qian Ge、Jia-Sheng Qian、Jun Xuan
DOI:10.1021/acs.joc.9b00552
日期:2019.7.5
Visible-light-induced decarboxylative sulfonylation of cinnamicacids with aryl sulfonate phenol esters enabled by the electron donor–acceptor complex is developed. The method offers a mild and green approach for the synthesis of vinyl sulfones with excellent functional group compatibility under photocatalyst and oxidant-free conditions.
A copper-catalyzedreaction protocol for the dehydrogenation of ethylbenzenes into styrene derivatives has been developed. This reaction procedure proceeded well under mild reaction conditions, providing a practical and efficient strategy for the rapid assembly of biologically and pharmaceutically significant molecules, such as vinyl sulfone. Simple alkyl arenes were functionalized via consecutive
已经开发出铜催化的用于将乙苯脱氢成苯乙烯衍生物的反应方案。该反应过程在温和的反应条件下进行得很好,为生物学和药学上重要的分子(如乙烯基砜)的快速组装提供了实用而有效的策略。在存在N-磺酰基苯并[ d ]咪唑的情况下,通过连续的β-消除作用将简单的烷基芳烃官能化,具有广泛的底物范围和良好的官能团耐受性。
CAN Mediated Reaction of Aryl Sulfinates with Alkenes and Alkynes: Synthesis of Vinyl Sulfones, β-Iodovinyl Sulfones and Acetylenic Sulfones
作者:Vijay Nair、Anu Augustine、T. D. Suja
DOI:10.1055/s-2002-34838
日期:——
Cerium(IV) ammonium nitrate (CAN) mediated reaction of arylsulfinates and sodium iodide with alkenes afforded vinylsulfones in very good yields. Alkynes underwent similar reaction to give β-iodovinyl sulfones, which on treatment with potassium carbonate afforded the corresponding acetylenic sulfones in high yields.
Copper(II)-Catalyzed Chemo- and Stereocontrolled Synthesis of (E)-Vinyl Sulfones and (Z)-β-Chlorovinyl Sulfones from Terminal Alkynes and Arylsulfonyl Hydrazides
chemoselectivity as well as stereoselectivity. A facile copper(II)-catalyzed regio- and stereocontrolled synthesis of vinyl sulfones from terminal alkynes and arylsulfonyl hydrazides is described. Depending on the source of copper(II), two different kinds of vinyl sulfones, (E)-vinyl sulfones and (Z)-β-chlorovinyl sulfones were obtained and the addition of cyclohexanone played an important role in the