| 摘要 |
1495245 Carboxylation process MONTEDISON SpA 24 March 1976 [28 March 1975] 11916/76 Heading C2C A process for carboxylating a ketone, ester, nitroparaffin or nitrile substrate comprises reacting said substrate with CO 2 and an alkali metal phenate in a linear or cyclic ester, cyclic ether, cyclic sulphone, tertiary aliphatic or cycloaliphatic amine or a saturated or unsaturated heterocyclic base. The preferred reaction temperature is 40‹ to 60‹ C. The phenate may be prepared in situ from the corresponding phenol and alkali metal hydroxide and the water formed being eliminated azeotropically with excess solvent. |
