Nickel-Catalyzed Direct Synthesis of Aryl Olefins from Ketones and Organoboron Reagents under Neutral Conditions
作者:Chuanhu Lei、Yong Jie Yip、Jianrong Steve Zhou
DOI:10.1021/jacs.7b02742
日期:2017.5.3
Nickel-catalyzed addition of arylboron reagents to ketones results in aryl olefins directly. The neutral condition allows acidic protons of alcohols, phenols, and malonates to be present, and fragile structures are also tolerated.
Construction of Polysubstituted Olefins through Ni-Catalyzed Direct Activation of Alkenyl CO of Substituted Alkenyl Acetates
作者:Chang-Liang Sun、Yang Wang、Xiao Zhou、Zhen-Hua Wu、Bi-Jie Li、Bing-Tao Guan、Zhang-Jie Shi
DOI:10.1002/chem.200902785
日期:2010.5.25
Reliable companion: For the first time cross‐coupling between alkenyl acetates and arylboroxines/PhZnCl has been developed via Ni catalysis. Alkenyl acetates could be well‐differentiated from aryl acetates (see scheme). This reliable method provides a convenient pathway to construct polysubstituted styrene derivatives.
A metal-free hexafluoroisopropanol-mediated hydro-phosphorothiolation of styrenes and donor–acceptor cyclopropanes with S-hydrogen phosphorothioates in a Markovnikov fashion has been developed under ambient reaction conditions to afford a library of S-alkyl phosphorothioates. Notably, this strategy provides a simple and efficient way to produce biologically significant kitazin and iprobenfos derivatives
Hydroarylation of Alkenes by Protonation/Friedel–Crafts Trapping: HFIP-Mediated Access to Per-aryl Quaternary Stereocenters
作者:Christian D.-T. Nielsen、Andrew J. P. White、David Sale、Jordi Bures、Alan C. Spivey
DOI:10.1021/acs.joc.9b02393
日期:2019.11.15
a combination of HFIP and an organic sulfonic acid, alkenes behave as Brønsted bases and protonate to give carbocations which can be trapped by electron-rich arenes. The reaction constitutes a Friedel-Crafts hydroarylation which proceeds with Markovnikov selectivity and is orthogonal to traditional metal-catalyzed processes. Intermolecular transfer hydrogenation and hydrothiolation under analogous conditions