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Publication of GB1052088ApublicationCriticalpatent/GB1052088A/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
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Abstract
1,052,088. Unsaturated carboxylic acids. VSESOJUZNY NAUCHNO - ISSLEDOVATELSKY INSTITUTE NEFTEKHIMICHESKIKH PROTSESSOV. July 9, 1964. No. 28438/64. Heading C2C. Unsaturated carboxylic acids are prepared from di-olefines, water, and carbon monoxide, in the presence of metal carbonyls at 100- 300‹ C. and at pressures above 20 atmospheres and in which process pyridine or quinoline is introduced to the reaction zone. Examples describe the preparation of the trans-isomer of 3-pentenic acid from butadiene, and heptenic acid from hexadiene-1,5.
Process for isolating 2-hydroxynaphthalene carboxylic acids from a reaction mixture of an alkali metal salt of 2-hydroxynaphthalene with carbon dioxide