| 摘要 |
PURPOSE:To obtaining the titled compound by reacting a carboxylic acid with vinyl acetate in the presence of a palladium slat and a cupric salt, to prevent deterioration in catalytic activity, to keep the activity with a minimum amount and to improve yield advantageously, by carrying out the reaction in the presence of a specific compound. CONSTITUTION:In reacting an aromatic or aliphatic carboxylic acid with vinyl acetate in the presence of extremely reduced amounts of a palladium salt and a cupric slat, a lithium halide and an alkali secondary phosphate or an alkali tertiary phosphate are added to the reaction mixture and the reaction is carried out at 70 deg.C - the reflux temperature of the reaction mixture to give the aimed compound. Lithium chloride, etc., may be cited as the lithium halide and the amount of it used is about 1-2 millimol based on 1 mol raw material acid and the amount of the alkali secondary phosphate or tertiary phosphate used is preferably 0.01-0.3 mol. Palladium acetate is used as the palladium salt and the amount used is 0.01-0.03 mol% based on 1 mol raw material acid. |
