Ni-Catalyzed Reductive Allylation of α-Chloroboronates to Access Homoallylic Boronates
作者:Yixian Lou、Jian Qiu、Kai Yang、Feng Zhang、Chenglan Wang、Qiuling Song
DOI:10.1021/acs.orglett.1c01213
日期:2021.6.18
transition-metal-catalyzed allylation reaction is an efficient strategy for the construction of new carbon–carbon bonds alongside allyl or homoallylic functionalization. Herein we describe a Ni-catalyzed reductive allylation of α-chloroboronates to efficiently render the corresponding homoallylic boronates, which could be readily converted into valuable homoallylic alcohols or amines or 1,4-diboronates
过渡金属催化的烯丙基化反应是在烯丙基或均烯丙基官能化的同时构建新碳-碳键的有效策略。在本文中,我们描述了 α-氯硼酸酯的 Ni 催化还原烯丙基化,以有效地生成相应的高烯丙基硼酸酯,其可以很容易地转化为有价值的高烯丙基醇或胺或 1,4-二硼酸酯。该反应具有广泛的底物范围和良好的官能团兼容性,是对现有制备高烯丙基硼酸酯方法的补充。
Highly Regio- and Stereoselective Palladium(0)-Catalyzed Addition of Organoboronic Acids with 1,2-Allenic Sulfones, Sulfoxides, or Alkyl- or Aryl-Substituted Allenes in the Presence of Acetic Acid: An Efficient Synthesis of <i>E</i>-Alkenes
作者:Shengming Ma、Hao Guo
DOI:10.1055/s-2007-983822
日期:2007.9
reaction conditions were established to enable the palladium(0)-catalyzed addition of organoboronicacids with 1,2-allenic sulfones, sulfoxides, or alkyl- or aryl-substituted allenes in the presence of acetic acid. This reaction provides a new way for the stereoselective synthesis of tri- or tetrasubstituted E-alkenes. With arylboronic acids, the reactions of 1,2-allenic sulfones, sulfoxides, and alkyl-substituted
New Reactions of Quaternary Ammonium Salts Derived from Vinamidinium Salt Reduction Products and A Reassignment of Structure
作者:John T. Gupton、Dale A. Krolikowski、Richard H. Yu、Ken J. Barr、Steven J. Duranceau
DOI:10.1080/00397919208019298
日期:1992.4
Abstract The structure of a vinamidinium salt reduction product is revised and some reactions of related allylic ammoniumsalts with sulfur nucleophiles is presented.
Regiodivergent sulfonylation of terminal olefins <i>via</i> dearomative rearrangement
作者:Ever A. Blé-González、Stephen R. Isbel、Olatunji S. Ojo、Patrick C. Hillesheim、Matthias Zeller、Alejandro Bugarin
DOI:10.1039/d3nj03595f
日期:——
Sulfones are fascinating and highly used functional groups, but current syntheses still have limitations. Here, a regiodivergent transition metal-free approach towards sulfones [(E)-allylic sulfones and α-sulfonylmethyl styrenes] is reported. The method employs commercially available olefins, bases, additives, solvents, and sodium sulfinates (RSO2Na) and produces adducts in good yields. Considering
砜是令人着迷且广泛使用的官能团,但目前的合成仍然存在局限性。在此,报道了一种针对砜[( E )-烯丙基砜和α-磺酰甲基苯乙烯]的区域分散的无过渡金属方法。该方法使用市售烯烃、碱、添加剂、溶剂和亚磺酸钠(RSO 2 Na)并以良好的产率生产加合物。考虑到发生多达 4 个反应(溴化、脱芳香重排、E2 和 S N 2),这种方法非常有效。关键加合物的结构通过X射线晶体学证实。
Electroreductive Nickel-Catalyzed Allylation of Aryl Chlorides
作者:Xin Fu、Tingting Ran、Yu Zhou、Jie Liu
DOI:10.1021/acs.joc.2c02926
日期:2023.5.5
allylation viaelectrochemical promoted Ni-catalyzed reductive carbon–carbon bond formation. Readily available (hetero)aryl chlorides with a variety of allylic sulfones are used as electrophiles in this electroreductive coupling. This Ni-catalyzed modular approach displays generally good functional group tolerance and broad substrate scope. This reaction allows a series of allyliccompounds to be created