Synthesis Process of 4-Nitrobenzoic Acid Methyl Ester
The production route for synthesizing 4-nitrobenzoic acid methyl ester from 4-nitrobenzoic acid was optimized.The effects of catalyst,solvent,temperature and recycling times of mother liquor on the reaction were investigated.The optimum conditions as fol-lows:oleum as catalyst,dimethyl carbonate as solvent,reacted at reflux temperature for 10 h,and mother liquor recycled 5 times.Under these conditions,the yield could reach up to 94.7%.
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