| abstract |
Method comprising the method steps: a) presentation of an ethylenically unsaturated compound; b) adding a ligand-metal complex comprising Pd and a bidentate phosphine ligand, or adding a bidentate phosphine ligand and a compound comprising Pd; c) adding an alcohol; d) supplying CO; e) heating the reaction mixture, wherein the ethylenically unsaturated compound is converted to an ester, wherein less than 0.1 mol%, based on the molar amount of the ethylenically unsaturated compound, Brønsted acids having an acid strength of pks≤3 are added to the reaction mixture, characterized in that the phosphine ligand is substituted on at least one phosphorus atom with at least one heteroaryl radical. |