带乙酰胺基苯并氧化呋咱化合物的合成及其热分解

Syntheses and Thermal Decomposition of Benzofuroxans Substituted by Acetylamino Groups

从间氯苯胺和间二氯苯胺出发,经酰化、硝化、叠氮化和脱氮4步反应,合成了5-乙酰胺基-6-硝基苯并氧化呋咱(e)和7-乙酰胺基苯并二氧化呋咱(j),而(e)和(j)未见文献报道,其结构得到了元素分析、红外光谱、核磁共振氢谱和质谱的确定。文章还利用差热仪研究了目标化合物的热分解,获得了热分解动力学参数:表观活化能E,表观指前因子A和反应速度常数K。

5 - Acetylamino - 6 - nitorbenzofaroxan (e) and 7- acetylamino benzodifu-roxan(j)have been synthesized for the first time from m-chloroaniline and m-dich-loroaniline through four steps of reaction, i.e . acetylation, nitration, azidation and pyrolysis . The molecular structures of (e) and (j) have been determined applying methods of elemental analysis, IR, NMR and MS spectroscopy . With the technique of differential thermal analysis (DTA) were obtained the kinetic parameters of thermal decomposition of (e) and (j) : their activated energy E , pre- exponential factor A and rate constants k .