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本发明公开了一种3,5-二甲基-4-硝基吡啶-N-氧化物的合成方法,属于化工领域。该方法是将3,5-二甲基吡啶-N-氧化物与浓硫酸混合形成混合液,在温度为0℃~60℃条件下,将硝酸钾的硫酸溶液滴加到所述的混合液中,然后在温度为60℃~120℃的条件下反应0.5~12小时,制备得到3,5-二甲基-4-硝基吡啶-N-氧化物。本发明的3,5-二甲基-4-硝基吡啶-N-氧化物的合成方法采用硝酸钾为硝化试剂,代替浓硝酸或发烟硝酸,反应时间
The invention discloses a method for synthesizing 3,5-dimethyl-4-nitropyridine-N-oxide, belonging to the chemical field. The method is that 3,5-dimethylpyridine-N-oxide is mixed with concentrated sulfuric acid to form a mixed solution, and the sulfuric acid solution of potassium nitrate is added dropwise to the mixed solution under the condition of a temperature of 0 DEG C to 60 DEG C , And then reacted at a temperature of 60 ° C to 120 ° C for 0.5 to 12 hours to prepare 3,5-dimethyl-4-nitropyridine-N-oxide. The method for synthesizing 3,5-dimethyl-4-nitropyridine-N-oxide of the present invention uses potassium nitrate as a nitration reagent, instead of concentrated nitric acid or fuming nitric acid, and the reaction time