Patent ID: 9023626
Filing Date: 2015-05-05
Classification: C07C,C12P

Abstract:
1. A process for the synthesis of diacids or diesters of general formula ROOC—(CH 2 ) n —(CH═CH) a —(CH 2 ) m COOR 1 , wherein n and m, which are identical or different, each represent an integer such that their sum is between 6 and 15, a is 0 or 1 and R and R 1 are either H or an alkyl radical comprising from 1 to 4 carbon atoms, starting from long-chain natural monounsaturated fatty acids or esters comprising at least 10 adjacent carbon atoms per molecule, of formula CH 3 —(CH 2 ) p —CH═CH(CH 2 ) q —COOR, in which R represents H or an alkyl radical comprising from 1 to 4 carbon atoms and p and q, which are identical or different, are between 2 and 11, comprising: oxidizing, in a first step, by fermentation by a microorganism comprising oxygenase enzymes, said long-chain natural monounsaturated fatty acid or ester to give at least one monounsaturated dicarboxylic acid or dicarboxylate, and thereafter, subjecting, in a second step, the product from the first step to cross-metathesis with a compound of formula R wherein the diacids or diesters of general formula ROOC—(CH