Synthesis and properties of 5-substituted 1-dinitromethyl-3-nitro-1 H-1,2,4-triazoles
摘要:
Denitration of 5-R-substituted 3-nitro-1-trinitromethyl-1H-1,2,4-triazoles (R = CH(3), Cl, Br, N(3), NH(2)) by the action of potassium iodide or hydroxylamine, followed by treatment with sulfuric acid, gave the corresponding 1-dinitromethyl derivatives which were shown to be very strong CH acids (pK(a) -0.55 to -1.62).
A number of 5-R-substituted 3-nitro-1-trinitromethyl-1H-1,2,4-triazoles (R = Me, Cl, Br, N(3), NH(2), NO(2)) were synthesized by nitration of the corresponding omega-(5-R-3-nitro-1H-1,2,4-triazol-1-yl)alkan-2-ones with mixtures of concentrated sulfuric and nitric acids.
Thermal ring-openingreaction of N-(R-dinitromethyl)-5-nitrotetrazoles (R=NO2, F, Cl) yielded highly reactive N-(R-dinitromethyl)-nitrilimine intermediates under mild conditions. These species underwent facile and regiospecific reaction with nitriles and acetylenes to afford the corresponding nitrotriazoles and nitropyrazoles in 50–90% yields. Treatment of N-(chlorodinitromethyl)-5-nitrotetrazole with
N-(R-二硝基甲基)-5-硝基四唑(R = NO 2,F,Cl)的热开环反应在温和条件下产生了高反应性的N-(R-二硝基甲基)-硝胺中间体。这些物种与腈和乙炔进行易位和区域特异性反应,以50-90%的产率提供相应的硝基三唑和硝基吡唑。用过量的叠氮化物处理N-(氯二硝基甲基)-5-硝基四唑得到分子式为C 2 N 14的独特化合物。根据分析数据,将其分配为二叠氮基亚甲基羰基肼基二叠氮化物的结构。