Telomerization of dienes

A method for preparing a heterogeneous catalyst precursor suitable for the telomerization of C4-8 hydrocarbyl dienes with an oxygenated compound containing active hydrogen atom compounds consisting essentially of impregnating a solid alumina or titanium oxide support with a C1-4 carboxylate, halide or acetylacetonate of a metal selected from the group consisting of Pd and Pt from a medium selected from the group consisting of water, C1-4 alcohols, C1-4 ketones, C1-4 carboxylic acids, and C6-10 aromatic hydrocarbyl compounds which are unsubstituted or substituted by one or more C1-4 alkyl radicals, to provide from 0.05 to 5 weight % of said metal based on the total weight of oxide support used, drying the impregnated catalyst at a temperature from 20° C. to 100° C. and a pressure of less than or equal to 101 kPa for a minimum of 2 hours, and heating the resulting impregnated support in an oxidizing atmosphere at a temperature from 450° C. to 850° C. for a time not less than 2 hours.