Oligomerisations electro-assistees —II: Dimerisation de la phenyl-1-pentene-2-one-3

With Li⁺ or TBA⁺ as counter ion the electrodimerization of phenylpent-2-en-3-one occurs by a 0.2 F initiation. This reaction is regio- and stereospecific with Li⁺, the radical autocatalytic reaction gave 100% yield of a new dimer. If TBA⁺ is used the primary step is an ion-substrate reaction giving two isomers in equal proportion. All reaction products were structurally determined by 2D-NMR (SECSY or COSY and NOESY sequence).