The reactions of 3-nitro-4-R-furazans with ammonia were studied. The effect of the substituent R on the specific features of the nucleophilic substitution reaction observed was considered. The nitro group attached to the furazan ring can act as both the leaving group and the activating group facilitating the displacement of the second substituent (for example, OR' or N(NO2)R').
Synthesis of macrocyclic systems from 4,4′-diamino-3,3′-bi-1,2,5-oxadiazole and 3(4)-amino-4(3)-(4-amino-1,2,5-oxadiazol-3-yl)-1,2,5-oxadiazole 2-oxides
作者:M. A. Epishina、A. S. Kulikov、N. N. Makhova
DOI:10.1007/s11172-008-0101-0
日期:2008.3
Oxidative cyclocondensation of 4,4′-diamino-3,3′-bi-1,2,5-oxadiazole and isomeric 3(4)-amino-4(3)-(4-amino-1,2,5-oxadiazol-3-yl)-1,2,5-oxadiazole 2-oxides under the action of dibro-moisocyanurate gave 12- and 18-membered macrocyclic systems containing two or three bifurazanyl or furazanylfuroxanyl moieties linked by azo bridges. The latter were oxidized into azoxy groups with Caro’s acid in 20% oleum.
作者:Dennis Fischer、Thomas M. Klapötke、Marius Reymann、Jörg Stierstorfer
DOI:10.1002/chem.201400362
日期:2014.5.19
give corresponding 3,3′‐dinitramino‐4,4′‐bifurazane (4), 3,3′‐dinitramino‐4,4′‐azofurazane (5) and 3,3′‐dinitramino‐4,4′‐azoxyfurazane (6), respectively. The neutral compounds show very imposing explosive performance but possess lower thermal stability and higher sensitivity than hexogen (RDX). More than 40 nitrogen‐rich compounds and metal salts were prepared. Most compounds were characterized by low‐temperature
Synthesis, Characterization and Properties of Ureido‐Furazan Derivatives
作者:Tobias S. Hermann、Thomas M. Klapötke、Burkhard Krumm、Jörg Stierstorfer
DOI:10.1002/jhet.3109
日期:2018.4
razan and 3,4‐dinitroureido‐furazan. Furthermore, furazan derivatives linked to a second amino‐oxadiazole were synthesized. All compounds were intensively characterized by X‐ray diffraction measurements, NMR spectroscopy, vibrational spectroscopy (IR, Raman), BAM sensitivity tests and differential thermal analysis. The energetic properties were calculated using Explo5 6.03.
作者:Aleksei B. Sheremetev、Andrei S. Kozeev、Nadezhda V. Palysaeva、Kyrill Yu. Suponitsky
DOI:10.1039/d3nj03371f
日期:——
An efficient, one-pot protocol for the synthesis of aminofurazans from readily available and inexpensive bromomethyl ketones has been developed. Alkyl, aryl and heteroaryl aminofurazans have been synthesized and characterized by multinuclear NMR and single crystal X-ray crystallography.