INSERTION D'ALLENES. VI. IDENTIFICATION DU SITE REACTIONNEL DES COMPLEXES ANIONIQUES RESULTANT DE LA REACTION D'ALLENES AVEC DES ACYL FERRATES DANS LEURS REACTIONS AVEC CERTAINS ELECTROPHILES. FORMATION DE COMPLEXES η4-TRIMETHYLENE METHANE DU FER. ISOMERISATION D'UN LIGAND η4-TR...

Article abstract of DOI:10.1016/S0022-328X(00)86668-1

Aninos derived from the reaction between allenes and an alkylferrate are potential ambident nucleophiles which could react either at the metallic fragment site or at the oxo ligand oxygen atom.This last centre, which was already interacting preferentially with the cation Na⁺ in the starting metalate, has been shown to react with electrophiles such as trimethylsilyl chloride or H⁺.Neutral iron η⁴-trimethylenemethene is produced in high yield.With H⁺, the kinetic product is subsequently isomerised into a η⁴heterodiene complex.