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).
Crystal structures of the “two” 4-aminofurazan-3-carboxylic acids
作者:Rodney L. Willer、Robson F. Storey、Mark Frisch、Jeffery R. Deschamps
DOI:10.1002/jhet.821
日期:2012.1
The crystalstructures 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
已经确定了据报道为4-氨基呋喃-3-羧酸的两种化合物的晶体结构。Sheremetev等报道的化合物。(J Heterocycl Chem 2005,42,519)是实际的4-氨基呋喃赞纳3-羧酸。Meyer报告的化合物(Org Prep Proced Int 2004,36,361)是一种有趣的络合物,由酸的分子和酸的钾盐分子形成。J.杂环化学。(2012)。
New Route to Polynuclear Ni(II) and Cu(II) Complexes with Bridging Oxime Groups That Are Inaccessible by Conventional Preparations
作者:Adedamola A. Opalade、Carlos J. Gomez-Garcia、Nikolay Gerasimchuk
DOI:10.1021/acs.cgd.8b01262
日期:2019.2.6
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
A Safer Synthesis of the Explosive Precursors 4-Aminofurazan-3-Carboxylic Acid and its Ethyl Ester Derivative
作者:Christopher W. Miller、Eric C. Johnson、Rosario C. Sausa、Joshua A. Orlicki、Jesse J. Sabatini
DOI:10.1021/acs.oprd.0c00068
日期:2020.4.17
A safe and efficient one-pot synthesis of 4-aminofurazan-3-carboxylic acid and its hydrogen chloride gas-free conversion to the ethyl esterderivative 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
An efficient strontium-based combustion inhibitor of ammonium perchlorate with a 2D-MOF structure
作者:Yao Huang、Rufang Peng、Bo Jin
DOI:10.1039/d0nj06239a
日期:——
pre-exponential factor (A) of AP thermaldecomposition. After the addition of [Sr(AFCA)2(H2O)2]·2H2O}n in AP, there is an increase of 85.97 °C in the LTD stage of AP thermaldecomposition 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}n can act as an efficient