作者:Alexander M. Kuvshinov、Valentina I. Gulevskaya、Vladimir V. Rozhkov、Svyatoslav A. Shevelev
DOI:10.1055/s-2000-7120
日期:——
An efficient synthesis of 2-R-4,6-dinitro-2H-indazoles (R = aryl or substituted amine) from 2,4,6-trinitrotoluene was elaborated. The proposed method includes formation of C-(2,4,6-trinitrophenyl)-N-R-azomethines 1 (a - g) from TNT or the product of its transformation 2,4,6-trinitrobenzaldehyde (TNBA) with the further regiospecific substitution of the ortho-nitro group in 1 (a - g) by the azido group under the action of NaN3. Thermolysis of the azides 2 (a - g) gives previously unknown 2-R-4,6-dinitro-2H-indazoles 3 (a - g) in high yields.
阐述了从 2,4,6-三硝基甲苯有效合成 2-R-4,6-二硝基-2H-吲唑(R = 芳基或取代胺)的方法。所提出的方法包括从 TNT 或其转化产物 2,4,6-三硝基苯甲醛 (TNBA) 形成 C-(2,4,6-三硝基苯基)-N-R-偶氮甲碱 1 (a - g),并进一步进行区域特异性取代1(a-g)中的邻硝基在NaN3的作用下被叠氮基取代。叠氮化物 2 (a - g) 的热分解以高产率得到以前未知的 2-R-4,6-二硝基-2H-吲唑 3 (a - g)。