Palladium-Free Synthesis of Conjugated Enynes by Direct Olefination of Terminal Alkynes Using Vinyl Bromides
作者:Yunyun Liu、Jianguo Yang、Weiliang Bao
DOI:10.1002/ejoc.200900954
日期:2009.11
A series of conjugatedenynes were successfully synthesized by the direct copper-catalyzed coupling reaction of vinylbromides and alkynes. The reaction proceeds smoothly in DMF at 110 °C to give the corresponding products in good to excellent yields. The protocol is tolerant to a broad range of functional groups on the substrates. Moreover, the products were furnished as specific E isomers, as the
Ligand-accelerating low-loading copper-catalyzed effective synthesis of (E)-1,3-enynes by coupling between vinyl halides and alkynes performed in water
作者:Peng Sun、Hong Yan、Linhua Lu、Defu Liu、Guangwei Rong、Jincheng Mao
DOI:10.1016/j.tet.2013.06.063
日期:2013.8
The useful conjugated enynes could be easily prepared via low-loading (0.0001 mol %) copper-catalyzed coupling between vinylhalides and terminal alkynes. It is noteworthy that this reaction could be preformed in water without using any co-solvents and the desired 1,3-enynes could be obtained with good yields. In the catalytic reaction, ligand-acceleration effect was markable.
CuI-Catalyzed Suzuki−Miyaura and Sonogashira Cross-Coupling Reactions Using DABCO as Ligand
作者:Jin-Heng Li、Ji-Lan Li、De-Ping Wang、Shao-Feng Pi、Ye-Xiang Xie、Man-Bo Zhang、Xi-Chao Hu
DOI:10.1021/jo0623742
日期:2007.3.1
presence of TBAB, CuI-catalyzedSuzuki−Miyauracross-coupling of vinyl halides and aryl halides with arylboronic acids was conducted smoothly to afford the corresponding diarylethenes and polyaryls in moderate to good yields usingDABCO (1,4-diazabicyclo[2.2.2]octane) as the ligand. We also found that the inexpensive CuI/DABCO catalytic system was effective for Sonogashiracross-couplings of aryl halides
Copper(i)-catalyzed synthesis of 1,3-enynes via coupling between vinyl halides and alkynes or domino coupling of vinyl halides
作者:Yan Zhu、Tingyi Li、Xiaoming Qu、Peng Sun、Hailong Yang、Jincheng Mao
DOI:10.1039/c1ob06210g
日期:——
1,3-Enynes were easily prepared from coupling between vinylhalides and alkynes or domino coupling of vinylhalides in the presence of copper iodide. It is noteworthy that the double-bond geometry of the vinylhalides was retained during the reaction. This ligand-free protocol is potentially useful and practical.