Kinetics of hydrolysis of five-membered C-nitroheterocycles: pyrazole, imidazole, 1,2,4-triazole, and isoxazole derivatives
作者:L. A. Trukhacheva、V. I. Levina、N. B. Grigor’ev、A. P. Arzamastsev、I. L. Dalinger、I. A. Vatsadze、G. P. Popova、S. A. Shevelev、V. G. Granik
DOI:10.1007/s11172-006-0195-1
日期:2005.12
dinitro derivatives of five-membered heterocycles, viz., pyrazole, imidazole, 1,2,4-triazole, and isoxazole, is accompanied by the elimination of the nitro group in the form of a nitrite anion. The hydrolysis kinetics was studied by the polarographic and photometric methods. The experimentally determined hydrolysis rate constants depend on the nature of the heterocycle. A possible mechanism for hydrolytic
五元杂环的单和二硝基衍生物(即吡唑、咪唑、1,2,4-三唑和异恶唑)的碱性水解伴随着硝基以亚硝酸根阴离子的形式被消除。通过极谱法和光度法研究了水解动力学。实验确定的水解速率常数取决于杂环的性质。根据计算出的反应热力学参数(ΔG≠、ΔH≠、ΔS≠),提出了所研究化合物水解转化的可能机制。