Utilisation de membranes echangeuses d'ions en electrosynthese organique. : V. Additions de michael induites par des bases électrogénérées au contact d'un électrolyte solide.

Abstract

The addition of carbon acids to acrylonitrile or methyl acylate can be initiated by means of bases electrogenerated in aprotic media in the absence of supporting-electrolyte, at the interface between a porous cathode and a solid polymer electrolyte. The consumption of electricity is below 10 -2 faraday per mole. Putting to the test donors with decreasing acidity (2-nitropropane, malononitrile, diethyl malonate, ethyl cyanacetate, 2-methylcyclohexanone, fluorene) allows to estimate the basicity level that can be reached at such an interface. The influence of different factors (such as the nature of the ion exchange membrane, the basicity of the second side of the membrane, the presence of a probase) on the rates and yields of the reactions has been investigated.