The influence of a non-micelle-forming surfactant on the electrocatalytic hydrogenation of carvone and limonene in aqueous medium at Raney nickel electrodes
作者:Valérie Beraud、Marc Thomalla、Jean Lessard
DOI:10.1139/v97-184
日期:1997.11.1
and limonene (8) at a Raneynickel cathode was studied in aqueous solutions containing a non-micelle-forming surfactant (didodecyldimethylammonium bromide, DDAB). The efficiency of ECH of these substrates was markedly increased compared to that observed previously with micelle-forming surfactants, and this for very low DDAB concentrations, as a consequence of the strong adsorption of DDAB on the electrode
double bond migration, hydrogenation of which leads to the products. For the carvomenthene epoxides the results are similar to those found in the 4-t-butyl series with competition between cisaddition and trans addition of hydrogen. The presence of the isopropenyl group leads to slower reactionrates in comparison with t-butyl analogues.