An efficient access to (1H-tetrazol-5-yl)furoxan ammonium salts via a two-step dehydration/[3+2]-cycloaddition strategy
摘要:
A general, highly effective two-step approach for direct synthesis of (1H-tetrazol-5-yl)furoxan ammonium salts with various functional substituents based on initial effective synthesis of cyanofuroxans by dehydration of furoxancarboxylic acid amides by the action of (CF3CO)(2)O/Py followed by [3+2]-cycloaddition of cyanofuroxans to ammonium azide, generated in situ from TMSN3 and NH4F, has been developed. (C) 2015 Elsevier Ltd. All rights reserved.
Design of hybrid heterocyclic systems with a furoxanylpyridine core via tandem hetero-Diels–Alder/retro-Diels–Alder reactions of (1,2,4-triazin-3-yl)furoxans
作者:Leonid L. Fershtat、Alexander A. Larin、Margarita A. Epishina、Igor V. Ovchinnikov、Alexander S. Kulikov、Ivan V. Ananyev、Nina N. Makhova
DOI:10.1039/c6ra05110c
日期:——
Two convenient, facile, regioselective and highly effective one-pot protocols for the synthesis of previously unknown hybrid heterocyclic systems with the furoxanylpyridine core based on the tandem inverse-electron-demand hetero-Diels–Alder/retro-Diels–Alder reactions of the tailor-made (1,2,4-triazin-3-yl)furoxans with 1-(pyrrolidino)cyclohexene and norbornadiene have been developed. The methods comprise
Oxidation of <i>o</i>-dioxime by (diacetoxyiodo)benzene: green and mild access to furoxans
作者:Qi Zhang、Cheng Zhao、Xun Zhang、Chunlin He、Siping Pang
DOI:10.1039/d1nj05510k
日期:——
widely used in the field of high energy density materials because of its excellent properties such as high density, high standard enthalpy of formation and high nitrogen content. However, its existing synthesis methods are still restricted by the problems of difficult substrate preparation and manual handling of hazardous reagents. Herein, we disclosed a mildoxidation strategy to efficiently obtain
A series of new energetic salts based on 4‐nitro‐3‐(5‐tetrazole)furoxan (HTNF) has been synthesized. All of the salts have been fully characterized by nuclear magnetic resonance (1H and 13C), infrared (IR) spectroscopy, elemental analysis, and differential scanning calorimetry (DSC). The crystal structures of neutral HTNF (3) and its ammonium (4) and N‐carbamoylguanidinium salts (9) have been determined
合成了一系列基于4-硝基-3-(5-四唑)呋喃聚糖(HTNF)的新的高能盐。所有盐均已通过核磁共振(1 H和13 C),红外(IR)光谱,元素分析和差示扫描量热法(DSC)进行了全面表征。中性HTNF(3)及其铵(4)和N-氨基甲酰基胍盐(9)的晶体结构已通过单晶X射线衍射分析确定。发现3及其9种盐的密度为1.63至1.84 g cm -3。冲击敏感度已通过锤击测试确定,结果范围从2 J(非常敏感)到> 40 J(不敏感)。理论性能计算(高斯03和EXPLO 5.05)提供爆轰压力和速度的离子化合物4 - 12在范围25.5-36.2 GPA和7934-8919米每秒-1,分别,这使得它们竞争性的高能材料。
4-(Nitroalkyl- and dinitroalkyl-ONN-azoxy)-3-cyanofuroxans and some of their derivatives
作者:V. V. Parakhin、N. I. Shlykova、O. A. Luk´yanov
DOI:10.1007/s11172-017-1734-7
日期:2017.2
Dibromoisocyanurate-mediated reaction of 4-amino-3-cyanofuroxans with pseudonitroles of aliphatic, alicyclic, and heterocyclic series (including pseudonitroles bearing ethylcarboxyl or additional nitro group) resulted in 4-(nitroalkyl- and dinitroalkyl-ONN-azoxy)-3-cyanofuroxans. Subsequent chemical transformations gave 4-(1,3-dinitrooxy-2-nitropropyl-2-ONN-azoxy)-3-cyano- and 4-carbamoylfuroxans, as well as 4-(1,1-dinitroethyl-ONN-azoxy)-3-(1H-tetrazol-5-yl)furoxans.