Zhu Wan-ren
2008
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Journal
Chinese Journal of Synthetic Chemistry
Abstract
Ethyl p-hydroxybenzoate(3) was synthesized by the esterification of p-hydroxybenzoic acid(1) and ethanol(2) using nanosolid superacid SO2-_4/Fe_2O_3 as a catalyst.The appropriate reaction conditions at 84 ℃~86 ℃ for 3 h were as follows: 1 was 25 mmol;n(1) ∶n(2) was 1 ∶4;w(catalyst) was 3.73%;toluene was 15 mL.The yield of 3 was 93.3% under the conditions.