<i>E</i>-Selective synthesis of vinyl sulfones <i>via</i> silver-catalyzed sulfonylation of styrenes
作者:Qingwen Gui、Kang Han、Zhuoliang Liu、Zhaohong Su、Xiaoli He、Hongmei Jiang、Bufan Tian、Yangyan Li
DOI:10.1039/c8ob01502c
日期:——
An efficient and highly E-selective protocol for the synthesis of vinyl sulfones is described. This simple protocol demonstrates the first synthesis of vinyl sulfonesvia a silver-catalyzed C–S bond coupling reaction. In addition, the success of the reaction was found to be critically dependent on the use of TEMPO as the additive.
Visible Light-Mediated Metal-Free Synthesis of Vinyl Sulfones from Aryl Sulfinates
作者:Andreas Uwe Meyer、Stefanie Jäger、Durga Prasad Hari、Burkhard König
DOI:10.1002/adsc.201500142
日期:2015.6.15
Visiblelight and eosin Y catalyze the synthesis of vinyl sulfones from aryl sulfinates and alkenes by a photoredox process. The reaction scope is broad in aryl sulfinates and alkenes and the general and simple procedure provides a metal‐free alternative for the synthesis of synthetically valuable vinyl sulfones.
Aerobic Copper-Catalyzed Synthesis of (<i>E</i>)-Vinyl Sulfones by Direct C–S Bond Oxidative Coupling
作者:Xiao Liang、Mingteng Xiong、Heping Zhu、Kexin Shen、Yuanjiang Pan
DOI:10.1021/acs.joc.9b01400
日期:2019.9.6
Copper-catalyzed aerobic oxidative C–Sbond coupling reaction between thiophenols and aryl-substituted alkenes for (E)-vinyl sulfones synthesis is reported here. With air utilized as a green oxidant, this transformation not only produces various vinyl sulfones in moderate to good yields but also possesses a simple and ecofriendly system. To clarify the mechanism, kinetic experiments has been investigated
Selective sulfonylation and oxosulfonylation of alkenes with sulfinates have been developed via anodic oxidation in an undivided cell. The novel electrosynthetic method provided β-keto sulfones and vinyl sulfones with good to excellent yields in the absence of any transition metal catalyst and oxidants. Mechanism studies show that two different pathways involved in these two transformations.
Aromatization of tetrahydrocyclopropa[<i>a</i>]naphthalenes: An alternative synthesis of 1<i>H</i>-Cyclopropa[<i>a</i>]naphthalene
作者:Paul Müller、GéRald Bernardinelli、Huong Can Godoy-Nguyen Thi
DOI:10.1002/hlca.19890720723
日期:1989.11.1
1H-Cyclopropa[a]naphthalene (1a) is accessible via reduction of the dichloro compound 1c with LiAlH4/AlCl3. Several derivatives of tetrahydrocyclopropa[a]naphthalene were synthesized. However, contrary to their 1,1-dihalogeno analogues, they afforded no cycloproparenes upon attempted aromatization.
通过用LiAlH 4 / AlCl 3还原二氯化合物1c可得到1 H-环丙烷[ a ]萘(1a)。合成了四氢环丙烷[ a ]萘的几种衍生物。然而,与它们的1,1-二卤代类似物相反,它们在试图进行芳构化时没有提供环丙烷。