Electrosynthesis of vinyl sulfones from alkenes and sulfonyl hydrazides mediated by KI: Аn electrochemical mechanistic study
作者:Alexander O. Terent'ev、Olga M. Mulina、Dmitry A. Pirgach、Alexey I. Ilovaisky、Mikhail A. Syroeshkin、Nadezhda I. Kapustina、Gennady I. Nikishin
DOI:10.1016/j.tet.2017.10.047
日期:2017.12
sulfones were prepared from alkenes and sulfonyl hydrazides via electrochemical oxidative sulfonylation. The reaction proceeds in an experimentally convenient undivided electrochemical cell equipped with graphite and iron electrodes employing KI as a redox catalyst and a supporting electrolyte. Applying extremely high current density up to 270 mA/cm2 permits rapid synthesis in a compact reactor and
由烯烃和磺酰肼通过电化学氧化磺酰化反应制备了各种乙烯基砜。该反应在配备了石墨和铁电极且使用KI作为氧化还原催化剂和支持电解质的实验方便的未分隔电化学电池中进行。施加高达270 mA / cm 2的极高电流密度,可以在紧凑的反应器中以小表面积电极快速合成。利用循环伏安法提出了一种可能的反应机理。在该反应中阳极和阴极过程的结合使得可以在温和的条件下以中等至高的产率获得产物。
Revealing the metal-like behavior of iodine: an iodide-catalysed radical oxidative alkenylation
作者:Shan Tang、Yong Wu、Wenqing Liao、Ruopeng Bai、Chao Liu、Aiwen Lei
DOI:10.1039/c4cc00644e
日期:——
Catalytic HI elimination similar to the β-hydride elimination of transition metals was realized for the radical alkenylation of sulfonyl hydrazides.
类似于过渡金属的β-氢化物消除反应,对磺酰基肼的自由基烯基化实现了催化HI消除反应。
Stereoselective Synthesis of (E)-Alkenyl Sulfones from Alkenes or Alkynes via Copper-Catalyzed Oxidation of Sodium Sulfinates
作者:Nobukazu Taniguchi
DOI:10.1055/s-0030-1260544
日期:2011.6
Alkenyl sulfones can be stereoselectively synthesized from alkenes or alkynes using sodium sulfinates. The reaction can be performed by a copper-catalyzedoxidation of sodium sulfinates in air. The reaction of alkenes gives (E)-alkenyl sulfones via anti addition of sulfonyl cation and elimination process. Furthermore, the employment of alkynes produces (E)-β-haloalkenyl sulfones in the presence of
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.