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
Cyclopropyl derivatives have been prepared with good yields by transition-metal catalysed electroreductive coupling of activated olefins 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
通过过渡金属催化的活化烯烃和未活化的宝石-二溴化合物的电还原偶联,已经以良好的收率制备了环丙基衍生物。该电解的特征在于使用Fe / Ni催化剂体系,乙腈作为溶剂,催化量的三苯基膦作为配体。该方法是从活化烯烃经典制备环丙基衍生物的一个很好的选择(Simmons-Smith反应,重氮甲烷的1,3-偶极加成,磷和硫的硫化物的1,4-加成)。