Ambient arylmagnesiation of alkynes catalysed by ligandless nickel(ii)
作者:Fei Xue、Jin Zhao、T. S. Andy Hor
DOI:10.1039/c3cc45202f
日期:——
A simple and efficient catalytic arylmagnesiation of diarylacetylenes and aryl(alkyl)acetylenes is accomplished by NiCl2·6H2O at r.t. in the absence of stabilising ligands. The corresponding tetra-substituted alkenes can be obtained in good yields by subsequent treatment with different electrophiles.
Palladium- and Nickel-Catalyzed Kumada Cross-Coupling Reactions of <i>gem</i>-Difluoroalkenes and Monofluoroalkenes with Grignard Reagents
作者:Wenpeng Dai、Juan Xiao、Guanyi Jin、Jingjing Wu、Song Cao
DOI:10.1021/jo5022234
日期:2014.11.7
A novel Kumada–Tamao–Corriu cross-couplingreaction of gem-di- or monofluoroalkenes with Grignard reagents, with or without β-hydrogen atoms, in the presence of a catalytic amount of palladium- or nickel-based catalysts has been developed. The reaction is performed under mild conditions (room temperature or reflux in diethyl ether for 1–2 h) and leads to di-cross- or mono-cross-coupled products in