Catalytic Properties of the Pd/C - Triethylamine System
Résumé
In the presence of Pd/C and a catalytic amount of triethylamine, allylic alcohols are isomerized into the corresponding carbonyl compounds. The isomerization is accompanied by Pd/C-catalyzed redox processes to give the saturated alcohol and the corresponding α,β-unsaturated ketone. Pd/C also catalyses the conjugate reduction of activated double bonds, using triethylamine as the source of the two newly incorporated hydrogen atoms, probably via a hydrido complex. During the reaction, the triethylamine undergoes unexpected Pd/C-catalyzed oligomerization to produce elongated aliphatic tertiary amines and ethylamine, which, in the conjugate reduction of α,β-unsaturated esters, resulted in the formation of the reduced ethylamides following a domino transamidation.