Palladium-catalyzed phosphine-, copper-free and aerobic Sonogashira coupling in aqueous media
作者:Chun Liu、Fanying Bao、Qijian Ni
DOI:10.3998/ark.5550190.0012.b06
日期:——
protocol for the Sonogashiracoupling of aryl iodides with terminal alkynes has been developed using Pd2(dba)3 (dba=dibenzylideneacetone) as the catalyst under aqueous, copper-free and aerobic conditions. The coupling of aryl iodides with aromatic terminal alkynes provided good to excellent yields and moderate to good yields were achieved using aliphatic terminal alkynes as one of the coupling partners. Aqueous
One-Pot Synthesis of Multisubstituted 2-Aminoquinolines from Annulation of 1-Aryl Tetrazoles with Internal Alkynes via Double C–H Activation and Denitrogenation
作者:Lei Zhang、Liyao Zheng、Biao Guo、Ruimao Hua
DOI:10.1021/jo502192b
日期:2014.12.5
An efficient, one-pot synthesis of multisubstituted 2-aminoquinolines from 1-aryl tetrazoles and internal alkynes has been developed. The reaction involves cyclization of 1-aryl tetrazoles with internal alkynes via rhodium(III)-catalyzed double C–H activation and copper(II)-mediated denitrogenation.
Nickel-Catalyzed Arylative Carboxylation of Alkynes with Arylmagnesium Reagents and Carbon Dioxide Leading to Trisubstituted Acrylic Acids
作者:Sheng Wang、Chanjuan Xi
DOI:10.1021/acs.orglett.8b01693
日期:2018.7.6
Nickel-catalyzed arylcarboxylation of alkynes with arylmagnesium reagents and carbondioxide (CO2, 1 atm) was realized in one pot. Various trisubstitutedacrylicacids within an aryl group at the β-position have been prepared efficiently with good regioselectivity under mild conditions. The resulting products could be further transformed to benzoannelated cycles retaining CO2 as a one-carbon synthon
Copper-Catalyzed Chemo-, Regio-, and Stereoselective Multicomponent 1,2,3-Trifunctionalization of Internal Alkynes
作者:Weilin Wang、Youliang Wang
DOI:10.1021/acs.orglett.2c00499
日期:2022.3.11
diaryliodonium salts promoted multicomponent 1,2,3-trifunctionalization of alkynes, where both the acetylenic bond and the adjacent nonactivated propargylic C(sp3)–H bond were functionalized synergistically to generate α-arylated enones with high chemo-, regio-, and stereoselectivity. A broad spectrum of diaryliodonium salts and internal alkynes could be utilized in this protocol, and a diverse collection of
Highly regioselective Lewis acid-catalyzed [3+2] cycloaddition of alkynes with donor–acceptor oxiranes by selective carbon–carbon bond cleavage of epoxides
作者:Renrong Liu、Mei Zhang、Junliang Zhang
DOI:10.1039/c1cc15669a
日期:——
A novel, efficient, highly regioselective Sc(OTf)3-catalyzed [3+2] cycloaddition of electron-rich alkynes with donorâacceptor oxiranes via highly chemoselective CâC bond cleavage under mild conditions was developed.