石炭酸誘導体のカルボキシル化反応(第3報) : ジメチルホル厶アミド中における石炭酸アルカリ塩よりパラオキシ安息香酸,サリチル酸の合成(その1)

概要

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In a previous report, the synthesis of p-hydroxybenzoic acid and salicylic acid from alkali phenoxides and carbon dioxide in aprotic-polar solvents was reported. In the present study, the effects of reaction conditions on the yields and the rule of orientation under atmospheric pressure were examined in a typical aprotic-polar solvent, N, N-dimethylfomamide. Stabilities of the alkali salts of p-hydroxybenzoic acid and salicylic acid in the solvent were also tested. It was found that the potassium and sodium salicylates were rather stable, whereas the salts of p-hydroxybenzoic acid, except its dipotassium salt, were rather unstable and readily decomposed into phenol and carbon dioxide.
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