邻乙氧基苯甲酸的简便合成

A Convenient Synthesis of o-Ethoxybenzoic Acid

水杨酸甲酯和溴乙烷在过量乙醇钠乙醇溶液中 ,40℃反应 8h ,皂化后 ,10 %H2 SO4 酸化至pH为 3 .5～ 4.0 ,蒸馏得质量分数高于 98%的邻乙氧基苯甲酸 ,收率为 92 %。

Methyl salicylate and bromoethane in alcohol was stirred for 8h at 40℃ in the presence of excessive sodium ethylate, saponified and then treated with 10% of H 2SO 4 to pH 3.5～4.0. Distillation of the mixture gave o ethoxybenzoic acid with 98% of the purity and 92% of the yield.