Copper-Mediated Selective Cross-Coupling of 1,1-Dibromo-1-alkenes and Heteronucleophiles: Development of General Routes to Heterosubstituted Alkynes and Alkenes
site-selective, double, or alkynylative cross-coupling, therefore providing divergent and straightforward entries to numerous building blocks such as bromoenamides, ynamides, ketene N,N-acetals, bromoenol ethers, ynol ethers, keteneO,O-acetals, or vinylphosphonates and further expanding the copper catalysis toolbox with useful and versatile processes.
entry to the corresponding β-silylenamides and -acrylates, which were formed with high levels of regio- and stereoselectivities. A highly efficient catalytic silylcupration of activated alkynes is reported. Upon reaction with silylboronates and methanol in THF at room temperature in the presence of copper(I) fluoride tris(triphenylphosphine), a range of ynamides and propiolates were found to undergo a
Metal-free hydroacyloxylation and hydration reactions of ynamides: synthesis of α-acyloxyenamides and N-acylsulfonamides
作者:Shijie Xu、Jianquan Liu、Donghua Hu、Xihe Bi
DOI:10.1039/c4gc01328j
日期:——
Two types of highly efficient and operationally simple reactions of ynamides under metal-free conditions are developed, including hydroacyloxylation and hydration, which afforded highly functionalized α-acyloxyenamides and pharmaceutically important N-acylsulfonamides in good to excellent yields.
Reactivity of Functionalized Ynamides with Tetracyanoethylene: Scope, Limitations and Optoelectronic Properties of the Adducts
作者:Marie Betou、Raphaël J. Durand、Dr Antoine Sallustrau、Claire Gousset、Erwann Le Coz、Yann R. Leroux、Dr Loïc Toupet、Elzbieta Trzop、Thierry Roisnel、Yann Trolez
DOI:10.1002/asia.201700353
日期:2017.6.19
The reactivity of functionalized ynamides and arylynamines with tetracyanoethylene at room temperature has been evaluated. In most cases, the corresponding 1,1,4,4-tetracyanobutadienes (TCBDs) have been obtained in good to excellent yields, following a sequence of [2+2]cycloaddition and [2+2]retroelectrocyclization. The influence of diverse functional groups on the yield of the reaction has been investigated