Preparation of unsaturated diester precursor for sebacic acid

Details Preparation of unsaturated diester precursor for sebacic acid Preparation of unsaturated diester precursor for sebacic acid

C - Chemistry, Metallurgy

07

C

260/480.4

C07C 69/52 (2006.01) C07C 69/50 (2006.01) C07C 69/602 (2006.01)

Patent

CA 1140575

Abstract of the Disclosure A process for producing an unsaturated diester useful as a precursor for sebacic acid which comprises contacting, in a reaction inert medium, methyl-2,4-pentadienoate at a temperature of 30 to 150°C under an inert atmosphere with a catalytic amount of a homogeneous palladium (II) complex of the formula Image wherein Q is phosphorous or arsenic; R is alkyl, trichloroalkyl, tribromoalkyl or trifluoroalkyl having from 1 to 6 carbon atoms or aryl having 6 to 12 carbon atoms and R1 is alkyl, aminoalkyl or alkoxy having 1 to 6 carbon atoms or aryl or aryloxy having 6 to 12 carbon atoms. The foregoing precursor may subsequently be hydrogenated to dimethyl sebacate and sebacic acid may then be obtained by acid-catalyzed hydrolysis of dimethyl sebacate.

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