Building Heterocyclic Systems with RC(OR)2+ Carbocations in Recyclable Brønsted Acidic Ionic Liquids: Facile Synthesis of 1-Substituted 1H-1,2,3,4-Tetrazoles, Benzazoles and Other Ring Systems with CH(OEt)3 and EtC(OEt)3 in [EtNH3][NO3] and [PMIM(SO3H)][O
作者:Gopalakrishnan Aridoss、Kenneth K. Laali
DOI:10.1002/ejoc.201100128
日期:2011.5
IL-1/CH(OEt) 3 . The latter was also formed from 2-aminobenzoic acid in IL-1/CH(OEt) 3 . Mechanistic implications are addressed. The reported protocols enable rapid assembly of a host of heterocyclic systems in high yields with the added advantage of recycling and reuse of the ILs.
Synthetic manifestation of nitro substituted tetrazole-N-(hetero)aryl derivatives and energetic studies
作者:Nagarjuna Kommu、M. Balaraju、Vikas D. Ghule、Akhila K. Sahoo
DOI:10.1039/c6ta10621h
日期:——
substituted tetrazole-N-aryl/heteroaryl derivatives is discussed here. The energetic functional groups –NO2, –NHNO2 and –N3 are reliably inserted into the molecular backbone, making the tetrazole-N-aryl derivatives highly energetic and insensitive to heat and impact. For example, the tetrazole derivatives 7 and 8, bearing a –NO2 or a –NHNO2 group, exhibit energetic properties close to RDX, but with enhanced
HClO<sub>4</sub>-SiO<sub>2</sub> as an Efficient and Reusable Heterogeneous Catalyst for the Synthesis of 1-substituted Tetrazoles
作者:Siavash Bahari、Akbar Rezaei
DOI:10.2174/157017861101140113161526
日期:2014.1.31
An efficient and direct protocol is described for the preparation of 1-substituted 1H-1,2,3,4-tetrazoles by the reaction
of primary amines, triethyl orthoformate and sodium azide in the presence of catalytic amount of silica-supported
perchloric acid under solvent-free and heterogeneous conditions. The thermal solvent-free green procedure offers advantages
such as simple methodology, easy work-up, high yield, recovery and reusability of catalyst.
Preparation of Fe<sub>3</sub>
O<sub>4</sub>
@5,10-dihydropyrido[2,3-<i>b</i>
]quinoxaline-7,8-diol copper complex: A capable nanocatalyst for the green synthesis of 1-substituted 1<i>H</i>
-tetrazoles
Fe3O4 magnetic nanoparticles functionalized with 5,10‐dihydropyrido[2,3‐b]quinoxaline‐7,8‐diol were synthesized as was their complex with copper as a novel nanomagnetic iron oxide catalyst via a simple and green method, and characterized using various techniques. The capability of the catalyst was evaluated in the one‐pot three‐component synthesis of different tetrazoles, which showed very good results
通过一种简单且绿色的方法合成了以5,10-二氢吡啶并[2,3- b ]喹喔啉-7,8-二醇官能化的Fe 3 O 4磁性纳米粒子,以及它们与铜的配合物,作为新型纳米磁性氧化铁催化剂,并且使用各种技术进行表征。在不同四唑的单锅三组分合成中评估了催化剂的能力,结果显示了很好的效果。温和的反应条件,良好的可重用性和简单的磁性处理使该方法对于四唑的有效合成很有趣。
Synthesis of Tetrazoles from Amines Mediated by New Copper Nanocatalyst
作者:M. Ariannezhad、D. Habibi、S. Heydari
DOI:10.1134/s1070428019100208
日期:2019.10
New copper nanocatalyst was prepared by coating Fe3O4 magnetic nanoparticles with tetraethyl orthosilicate (TEOS), followed by functionalization with 3-chloropropyl(trimethoxy)silane and 4H-1,2,4-tri-azol-4-amine and complexation with copper(II) chloride. The new catalyst was characterized by various spectroscopic methods and was successfully used in the synthesis of 1-aryl-1H-tetrazoles by reaction
通过用原硅酸四乙酯(TEOS)涂覆Fe 3 O 4磁性纳米粒子,然后用3-氯丙基(三甲氧基)硅烷和4 H -1,2,4-三氮唑-4-胺官能化并络合来制备新型铜纳米催化剂与氯化铜(II)。该新催化剂通过各种光谱学方法进行了表征,并在无溶剂条件下于100°C下通过芳族胺与叠氮化钠和原甲酸三乙酯的反应成功地用于合成1-芳基-1 H-四唑。