Boron compounds to inhibit formation of tar during the 'ene' reaction of an ethylenically unsaturated alpha, beta dicarboxylic acid compound and an ethylenically unsaturated hydrocarbon

摘要

A process for the production of a substituted alpha, beta dicarboxylic acid compound substantially free of tar and other resinous reaction byproducts comprising the reaction at conditions favoring the ENE reaction of an ethylenically unsaturated hydrocarbon and an ethylenically unsaturated alpha, beta dicarboxylic acid compound in the presence of a boron compound.