| 摘要 |
1. Process for the preparation of carboxylic acids or alkali salt derivatives thereof of formula (I) see diagramm : EP0222145,P7,F1 wherein X stands for a hydrogen or an alkali metal atom, and R**1 and R**2 are identical or different and represent each a linear or branched, saturated or unsaturated alkyl radical, characterized in that : A. an alkoxide formula (II) see diagramm : EP0222145,P7,F2 wherein Me stands for an alkali metal atom, in solution in an inert organic solvent under the reaction conditions, is treated with CO at a pressure of between 35 and 450 bar and at a temperature of between 120 and 160 degrees C, the thus obtained alkaline carboxylate is then treated with water and the resulting aqueous solution is finally acidified to give the desired acid, or B. an alkoxide of formula (II), in solution in an inert organic solvent under the reaction conditions, in the presence of a ligand of alkali metal cations, is treated with CO at a pressure of between 40 and 80 bar and at a temperature of 15 to 45 degrees C, the thus obtained alkali carboxylate is then treated with water and the resulting aqueous solution is finally acidified to give the desired acid. |
