61295-92-9Relevant academic research and scientific papers
An efficient strontium-based combustion inhibitor of ammonium perchlorate with a 2D-MOF structure
Huang, Yao,Peng, Rufang,Jin, Bo
, p. 11068 - 11074 (2021/07/06)
In this study, a new strontium 2D-MOF, {[Sr(AFCA)2(H2O)2]·2H2O}n(AFCA = 4-aminofurazan-3-carboxylic acid), was successfully prepared by slow evaporation at room temperature. Its structure was characterized by X-ray single-crystal diffractometry. DTA as an efficient thermal analysis method was used in this study to have a better understanding of the thermal decomposition of ammonium perchlorate (AP). The Kissinger and the Ozawa-Doyle methods were also applied to determine the apparent activation energy (E) and the pre-exponential factor (A) of AP thermal decomposition. After the addition of {[Sr(AFCA)2(H2O)2]·2H2O}nin AP, there is an increase of 85.97 °C in the LTD stage of AP thermal decomposition and an insignificant decrease of 24.32 °C in the HTD stage. With the help of the TG-DSC-DTG method, we analyse the catalytic mechanism of AP in the LTD stage in detail. {[Sr(AFCA)2(H2O)2]·2H2O}ncan act as an efficient combustion inhibitor for AP thermal decomposition.
A Safer Synthesis of the Explosive Precursors 4-Aminofurazan-3-Carboxylic Acid and its Ethyl Ester Derivative
Johnson, Eric C.,Miller, Christopher W.,Orlicki, Joshua A.,Sabatini, Jesse J.,Sausa, Rosario C.
, p. 599 - 603 (2020/04/20)
A safe and efficient one-pot synthesis of 4-aminofurazan-3-carboxylic acid and its hydrogen chloride gas-free conversion to the ethyl ester derivative are described. Previous syntheses of these intermediates were plagued with mischaracterization issues, low yields, and/or dangerous exothermic profiles. The safe scale-up of these materials not only provides benefits to the energetic materials community but may also be of importance to the pharmaceutical and agrochemicals industries.
New Route to Polynuclear Ni(II) and Cu(II) Complexes with Bridging Oxime Groups That Are Inaccessible by Conventional Preparations
Opalade, Adedamola A.,Gomez-Garcia, Carlos J.,Gerasimchuk, Nikolay
, p. 678 - 693 (2019/02/14)
A series of new polynuclear complexes of divalent Ni and Cu with 2-cyano-2-oximino-acetic acid (later AACO2-) were obtained as the result of the ligand modification reaction in the process of complexation, using 2-cyano-2-oximino-acetates such as methyl- (later as MeCO), and ethyl- (as ECO later on). Synthesized compounds were characterized by spectroscopic methods, thermal analysis, magnetochemistry, and X-ray crystallography. Crystal data revealed the formation of the dimeric [Ni(AACO)(H2O)3]2·H2O (1), trimeric K2[Ni3(AACO)4(H2O)4]·4H2O (2), and K2[Cu3(AACO)4(H2O)4]·4H2O (3) complexes, with bridging NO-groups cyanoxime dianions. In the latter two compounds, the AACO2- anions adopt cis-arrangements around metal centers. One mononuclear complex of K2[Cu(AACO)2(H2O)]·2H2O (4) composition was isolated and characterized as well, where the cyanoxime forms the trans-complex 4. There is moderate-to-strong antiferromagnetic coupling between metal centers in polynuclear complexes. Data of thermal analysis studies revealed high-energy properties for dehydrated complexes 3 and 4, which violently decompose at ～200 °C. These compounds may be viewed as room temperature completely safe, but heat-triggered actuators, because of their pronounced mechanical action upon leaving the system (crucible). Final products of thermal decomposition are Ni and NiO for 1, and the mixture of NiO and K2O for 2, with metallic copper for 3 and 4.
Thionation of a cyanoxime derivative to form the sulphur-containing derivative, a novel ligand for complexation with transitional metal ions
Hung, Truong Ngoc,ádám, Adél,Varga, Gábor,Dudás, Csilla,Kele, Zoltán,Sipos, Pál,Pálinkó, István
, p. 475 - 478 (2017/02/23)
2-Cyano-2-(hydroxyimino)dithioacetic acid was prepared starting from cyanoacetic acid methylester via 2-cyano-2-(hydroxyimino)acetic acid methylester. Before thionation, the ester had to be hydrolyzed. The optimum conditions for each reaction were identified. P4S10 was found to be the efficient thionation reactant resulting in the formation of the dithionated product. Its structure was verified with IR, NMR and mass spectrometric measurements.
Crystal structures of the "two" 4-aminofurazan-3-carboxylic acids
Willer, Rodney L.,Storey, Robson F.,Frisch, Mark,Deschamps, Jeffery R.
experimental part, p. 227 - 231 (2012/05/05)
The crystal structures of the two compounds reported to be 4-aminofurazan-3-carboxylic acid have been determined. The compound reported by Sheremetev et al. (J Heterocycl Chem 2005, 42, 519) is the actual 4-aminofurazan-3-carboxylic acid. The compound reported by Meyer (Org Prep Proced Int 2004, 36, 361) is the interesting complex formed from a molecule of the acid and a molecule of the potassium salt of the acid..
Synthesis of cyanopyrroles
Cheng, Lingjiang,Lightner, David A.
, p. 46 - 48 (2007/10/03)
Regioselective synthesis of α-cyanopyrroles (vs. α- alkoxycarbonylpyrroles) using oximinocyanoacetate esters in a Knorr-type reductive condensation with β-diketones can be directed by the presence of water. Thus, methyl oximinocyanoacetate was reacted with pentane-2,4-dione in hot acetic acid in the presence of zinc dust to give exclusively 3,5- dimethylpyrrole-2-carbonitrile when the acetic acid was wet; whereas, in glacial acetic acid only methyl 3,5-dimethylpyrrole-2-carboxylate was isolated (~40% yield).
Enchainements heteroatomiques et leurs produits de cyclisation. VI. Nouvelle synthese de cephemes: acetyl-3 methyl-7 phtalimido-7 oxo-8 thia-5 aza-1 bycyclooctenes-2 diastereomers
Roze, Jean-Claude,Pradere, Jean-Paul,Duguay, Guy,Guevel, Andre,Quiniuo, Herve,Poignant, Serge
, p. 1169 - 1175 (2007/10/02)
The total synthesis of two diastereomeric cephems is described with three original steps in excellent yields: construction of the 1,3-thiazine ring via a (4+2) cycloaddition reaction, regioselective hydrogenation of the carbon-nitrogen double bond, and la
