Nitropyrazoles 14. Synthesis of 1,3,4-trinitropyrazole and its behavior in the nucleophilic substitution reactions. General method of synthesis of 5-substituted 3,4-dinitropyrazoles
作者:I. L. Dalinger、T. I. Cherkasova、G. P. Popova、T. K. Shkineva、I. A. Vatsadze、S. A. Shevelev、M. I. Kanishchev
DOI:10.1007/s11172-010-0024-4
日期:2009.2
For the first time pyrazole containing three nitro groups in the pyrazole cycle, viz., 1,3,4-tri-nitropyrazole, was obtained by N-nitration of 3,4-dinitropyrazole. 1,3,4-Trinitropyrazole enters the cine-substitution reaction of N-nitro group under the action of 0-, N-, and C-nucleophyls under mild conditions. Thus, general method of synthesis of 5-substituted 3,4-dinitropyrazoles containing free NH fragment was worked out.
通过 3,4-二硝基吡唑的 N-硝化反应,首次获得了吡唑循环中含有三个硝基的吡唑,即 1,3,4-三硝基吡唑。在温和的条件下,1,3,4-三硝基吡唑在 0-、N- 和 C-核苷酸的作用下进入 N-硝基的 cine 取代反应。因此,我们找到了合成含有游离 NH 片段的 5-取代 3,4-二硝基吡唑的一般方法。