?-hydroaxyalkyl(benzyl)furozans and ?-hydroxyalkyl(benzyl)furoxans synthesis and reactivity
摘要:
A general,and simple preparative method for the synthesis of alpha-hydroxyalkyl(benzyI)furazan and -furoxan derivatives is proposed. The method involves reduction of acyl or ethoxycarbonyl substituents in these heterocyclic compounds with NaBH4 in ethanol. Based on the alcohols thus prepared, a number of previously unknown functional derivatives (alpha-nitroxyalkyl-,alpha-haloalkyl-, and alpha-azidoalkylfurazans and -furoxans) have been synthesized.
A Facile and Versatile Synthesis of Energetic Furazan‐Functionalized 5‐Nitroimino‐1,2,4‐Triazoles
作者:Zhen Xu、Guangbin Cheng、Hongwei Yang、Xuehai Ju、Ping Yin、Jiaheng Zhang、Jean'ne M. Shreeve
DOI:10.1002/anie.201701659
日期:2017.5.15
An analogue‐oriented synthetic route for the formulation of furazan‐functionalized 5‐nitroimino‐1,2,4‐triazoles has been explored. The process was found to be straightforward, high yielding, and highly efficient, and scalable. Nine compounds were synthesized and the physicochemical and energetic properties, including density, thermal stability, and sensitivity, were investigated, as well as the energetic
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
The First Synthesis of Furoxan and 1,3,4-Oxadiazole Ring Ensembles
作者:Aleksey O. Finogenov、Alexander S. Kulikov、Margarita A. Epishina、Igor V. Ovchinnikov、Yu. V. Nelyubina、Nina N. Makhova
DOI:10.1002/jhet.1048
日期:2013.1
Previously unknown furoxan and 1,3,4‐oxadiazole ringensembles incorporating two, three, and five furoxan and 1,3,4‐oxadiazole rings in different combinations were for the first time synthesized from accessible azides and hydrazides of furoxancarboxylic acids. An interdependence of furoxan and 1,3,4‐oxadiazole rings on their geometric parameters was revealed by the X‐ray diffraction method.
α,β-Unsaturated Carboxylic Acid Derivatives. XV. The Reaction of Ethyl 3-Nitro-2-alkenoate with Bromine Azide or Bromine, and Transformations of the Products
The reaction of ethyl (Z)-3-nitro-2-alkenoate (1) with one or two equivalents of bromine azide gave a one-to-one mixture of ethyl (E)-2-azido-3-nitro-2-alkenoate (3) and 4-ethoxycarbonyl-1,2,5-oxadiazole 2-oxide (5), or ethyl 3-bromo-2,2-diazido-3-nitroalkanoate (6), respectively, and the subsequent thermal and photochemical reactions of (E)-3 gave 2-ethoxycarbonyl-3-nitro-l-azirine, together with