Copper(I) and phase transfer catalysed allylic substitution by terminal alkynes
作者:Tuyêt Jeffery
DOI:10.1016/s0040-4039(00)99654-0
日期:1989.1
The Cu(I) catalysed allylic substitution of (un)substituted allyl halides by alk-1-ynes can proceed smoothly at or near room temperature under solid-liquid phasetransfer conditions.
Palladium-Catalyzed Decarboxylative Coupling of Alkynyl Carboxylic Acids with Benzyl Halides or Aryl Halides
作者:Wen-Wu Zhang、Xing-Guo Zhang、Jin-Heng Li
DOI:10.1021/jo1010284
日期:2010.8.6
synthesis of internal benzyl alkynes and 1,2-diarylalkynes has been developed via palladium-catalyzed decarboxylative coupling reactions of alkynyl carboxylic acids with benzyl chlorides or arylhalides. In the presence of Pd(OAc)2 and Xphos (L3), alkynyl carboxylic acids smoothly underwent the reaction with various benzyl halides, providing the corresponding benzyl alkynes in moderate to good yields. It
Facile coupling of propargylic, allylic and benzylic alcohols with allylsilane and alkynylsilane, and their deoxygenation with Et3SiH, catalyzed by Bi(OTf)3 in [BMIM][BF4] ionic liquid (IL), with recycling and reuse of the IL
作者:G. G. K. S. Narayana Kumar、Kenneth K. Laali
DOI:10.1039/c2ob26046h
日期:——
substituted propargylicalcohol 1e with allyl-TMS gave the skeletally intact 1,5-enyne and a ring opened derivative as a mixture. Coupling of propargylic/allylic alcohol 1f with allyl-TMS resulted in allylation at both benzylic (2 isomers) and propargylic positions, as major and minor products respectively. The scope of this methodology for allylation of a series of allylic and benzylic alcohols was explored
Cu(I)-Catalyzed Carboxylative Coupling of Terminal Alkynes, Allylic Chlorides, and CO<sub>2</sub>
作者:Wen-Zhen Zhang、Wen-Jie Li、Xiao Zhang、Hui Zhou、Xiao-Bing Lu
DOI:10.1021/ol102172v
日期:2010.11.5
A highly selective synthesis of a variety of functionalized allylic 2-alkynoates was realized via the carboxylative coupling of terminalalkynes, allylic chlorides, and CO2 catalyzed by the N-heterocyclic carbene copper(I) complex (IPr)CuCl. The catalyst can be easily recovered without any loss in activity and product selectivity.
Regioselective and Redox‐Neutral Cp*Ir
<sup>III</sup>
‐Catalyzed Allylic C−H Alkynylation
作者:Shobhan Mondal、Tobias Pinkert、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.202015249
日期:2021.3.8
bromoalkynes via intermolecular allylicC−Halkynylation. The developed mild reaction conditions tolerate a broad range of common functional groups, even enabling selective alkynylation of allylicC−H bonds in the presence of other prominent directing groups. Mechanistic experiments including the isolation of a catalytically active IrIII‐allyl species support an intermolecular allylicC−H activation followed by
在本文中,我们报道了Cp * Ir III催化的高度区域选择性和氧化还原中性方案,用于通过分子间烯丙基CH-H烷基化反应从未活化的烯烃和溴炔烃构建1,4-烯炔。发达的温和反应条件可以耐受广泛的通用官能团,甚至可以在存在其他重要的导向基团的情况下选择性烯丙基CH键进行炔基化反应。包括分离具有催化活性的Ir III-烯丙基物种的机械实验支持分子间烯丙基CH活化,然后进行亲电炔基化。