Synthesis and properties of 1-dinitromethyl-3-R-1,2,4-triazoles
摘要:
Reductive denitration of 1-trinitromethyl-3-R-1,2,4-triazoles by KI or NH2OH followed by the treatment of the formed 1-dinitromethyl-3-R-1,2,4-triazoles salts with sulfuric acid yielded dinitromethyl compounds (R = H, N-3, Cl, NO2), sufficiently strong CH-acids (pK(a) 1.37-0.12) whose typical reactions are similar to those of gem-dinitrocompounds from the aliphatic series. The spectral data and the analysis of correlation relations between pK(a) of 1-dinitromethyl-3-R-1,2,4-triazoles and the substituent constants confirm that their structure is analogous to that of the majority of compounds belonging to the mentioned series.
Synthesis of Trinitromethyl- and Dinitromethyl-Substituted Azoles Using Nitrate Salts in Sulfuric Acid
作者:Jean'ne Shreeve、Venugopal Thottempudi
DOI:10.1055/s-0031-1289736
日期:2012.4
Synthesis of trinitromethyl and dinitromethyl-substituted azoles employing a mild and efficient nitration method has been developed using a mixture of sulfuric acid and an inorganic nitrate salt XNO3, where X = NH4 +, Na+, K+. This methodology exhibits clear advantages over the more popular mixed acids nitration approach. Various nitro functionalities such as C-trinitromethyl, N-trinitromethyl, and
Kinetics of thermal decomposition of polyfunctional substituted azido-1,2,4-triazoles
作者:L. A. Kruglyakova、R. S. Stepanov
DOI:10.1134/s1070363212090216
日期:2012.9
regularities and the mechanism of the limiting step of thermaldecomposition of the polyfunctional substituted 1,2,4-triazoles in the melt and in solutions of inert solvents were established. The activation parameters of the limiting step were determined. Polyfunctional substituents are found to show little effect on the rate of thermaldecomposition of azide group in the azole ring.