不敏感炸药1-甲基-2,4,5-三硝基咪唑的合成

以咪唑为原料,通过两步硝化制得1,4-二硝基咪唑,然后在氯苯中热重排得2,4-二硝基咪唑,将2,4-二硝基咪唑进一步硝化并制得2,4,5-三硝基咪唑的钾盐,最后将钾盐甲基化,得到1-甲基-2,4,5-三硝基咪唑.采用红外光谱、元素分析、核磁的方法对其结构进行表征.用DSC进行了热分解研究.同时优化了2,4-二硝基咪唑的重排工艺:反应温度为120℃～125℃.反应时间为4h,1,4-二硝基咪唑和氯苯的物质的量比为1:30.对2,4,5-三硝基咪唑不稳定性进行了分析.

Synthesis and characterization of 1-methyl-2,4,5-trinitroimidazole

1-methyl-2,4,5-trinitroimidazole(MTNI) is an important polynitro imidazole compoundd.It was synthesized with imidazole as primary substance,by nitrateion obtaining 1,4-dinitroimidazole,and then thermal rearrangement in chlorobenzene,obmining 2,4-dinitroimidazole.Natration 2,4-dinitroimidazole and make it become Potassium 2,4,5-trinitroimidazolate.The last,Potassium 2,4,5-trinitroimidazolate was methylated,obtaining 1-methyl-2,4,5-trinitroimidazole.Its structure was characterized by IR elemental analysis and H1NMR.Thermal decomposition of 1-methy1-2,4,5-trinitroimidazole Was studied by DSC.Meanwhile,investingating thermal rearrangement,The optimum parameters were as follows;n(1,4-dinitroimidazole)/n(chlorobenzene)=1:30,reaction temperature 120℃～125℃.reaction time 4h.And explain why 2,4,5-trinitroimidazole was unstable.