Reactions CO-H 2: carbonylation reductive du dimethyl-ether et de l'acetate de methyle en presence de catalyseurs au ruthenium et au cobalt

Abstract

CO-H 2 reactions with dimethyl ether in the presence of Ru catalysts afford mainly methanol and ethanol. In acetic acid the corresponding acetates are formed. With the same catalysts the reductive carbonylation of methyl acetate gives ethyl acetate, formed by esterification of ethanol synthesized in the reaction by acetic acid issued from methyl acetate. In this reductive carbonylation the binary association of Ru-Co catalysts leads to a net increase in the yield of ethyl acetate. An iodide promotor and a proton donor are essential to the reaction. The reductive carbonylation of dimethyl ether and methyl acetate is a homogeneous catalytic reaction and proceeds via a common mechanism.