Formation of polysubstituted chlorocyclopropanes from electrophilic olefins and activated trichloromethyl compounds
作者:Sylvain Oudeyer、Eric Léonel、Jean Paul Paugam、Christine Sulpice-Gaillet、Jean-Yves Nédélec
DOI:10.1016/j.tet.2005.11.001
日期:2006.2
Chlorocyclopropanes and bicyclic chlorocyclopropanes are prepared in non basic conditions by electroreductive or Mg-promoted Barbier activation of PhCCl3 or Cl3CCO2Me in the presence of acyclic or cyclic α,β-unsaturated carbonyl compounds.
Cyclopropane formation by nickel-catalysed electroreductive coupling of activated olefins and unactivated gem-dibromo compounds
作者:Stéphane Sengmany、Eric Léonel、Jean Paul Paugam、Jean-Yves Nédélec
DOI:10.1016/s0040-4020(01)01133-4
日期:2002.1
Cyclopropylderivatives have been prepared with good yields by transition-metal catalysed electroreductive coupling of activatedolefins and unactivated gem-dibromo compounds. This electrolysis is characterized by the use of a Fe/Ni catalyst system, acetonitrile as the solvent and a catalytic amount of triphenylphosphine as ligand. This procedure is a good alternative to the classical preparations
Seven MIRC reactions of methyl dichloroacetate with alkenes containing electron-withdrawing groups were used to make 1-chlorocyclopropanecarboxylates. (C) 2012 Elsevier Ltd. All rights reserved.
Cyclopropane formation by electroreductive coupling of activated olefins and gem-polyhalo compounds
作者:Eric Léonel、Jean Paul Paugam、Sylvie Condon-Gueugnot、Jean-Yves Nédélec
DOI:10.1016/s0040-4020(98)00059-3
日期:1998.3
be involved to lead to the products. The radical anion of the olefin can react with the halo compound by electron-tranfer followed by radical coupling, or be reduced into the dianion which reacts by nucleophilicdisplacement.