Synthesis and Characterization of 5-Cyanotetrazolide-Based Ionic Liquids
摘要:
AbstractNew salts based on imidazolium, pyrrolidinium, phosphonium, guanidinium, and ammonium cations together with the 5‐cyanotetrazolide anion [C2N5]− are reported. Depending on the nature of cation–anion interactions, characterized by XRD, the ionic liquids (ILs) have a low viscosity and are liquid at room temperature or have higher melting temperatures. Thermogravimetric analysis, cyclic voltammetry, viscosimetry, and impedance spectroscopy display a thermal stability up to 230 °C, an electrochemical window of 4.5 V, a viscosity of 25 mPa s at 20 °C, and an ionic conductivity of 5.4 mS cm−1 at 20 °C for the IL 1‐butyl‐1‐methylpyrrolidinium 5‐cyanotetrazolide [BMPyr][C2N5]. On the basis of these results, the synthesized compounds are promising electrolytes for lithium‐ion batteries.
Heteropolyacid catalyzed click synthesis of 5-substituted 1H-tetrazoles from [bmim]N3 and nitriles under solvent-free conditions
摘要:
A simple and solvent-free route for the synthesis of 5-substituted 1H-tetrazoles is reported. In this method, 5-substituted 1H-tetrazoles are synthesized from nitriles and [bmim]N-3 with heteropolyacid (H3PW12O40) as a catalyst under solvent-free conditions.
Green and Facile Synthesis of 1,4-Disubstituted 1,2,3-Triazoles via a Click Reaction of &#945;-Bromo Ketones, [bmim]N<sub>3</sub> and Terminal Acetylenes
An efficient and green one pot method is reported for regioselective synthesis of 1,4-disubstituted 1,2,3-
triazoles. In this method, β-ketoazides are generated via in situ reaction between α-bromo ketones and 1-butyl-3-
methylimidazolium azide [bmim]N3 in aqueous ethanol and reacted with terminal acetylenes using Cu-CuSO4 at room
temperature to afford 1,4-disubstituted 1,2,3-triazoles.
Expanded perlite: an inexpensive natural efficient heterogeneous catalyst for the green and highly accelerated solvent-free synthesis of 5-substituted-1H-tetrazoles using [bmim]N<sub>3</sub> and nitriles
作者:Roya Jahanshahi、Batool Akhlaghinia
DOI:10.1039/c5ra21481e
日期:——
A versatile, green and highly accelerated protocol for preparing 5-substituted-1H-tetrazoles is reported using expanded perlite as a heterogeneous catalyst.
Magnetically separable Fe<sub>3</sub>O<sub>4</sub>@chitin as an eco-friendly nanocatalyst with high efficiency for green synthesis of 5-substituted-1H-tetrazoles under solvent-free conditions
作者:Monireh Zarghani、Batool Akhlaghinia
DOI:10.1039/c6ra07252f
日期:——
application of this new nanocatalyst allows the synthesis of a variety of tetrazoles through the reaction of nitriles with 1-butyl-3-methylimidazolium azide ([bmim][N3]) undersolvent-freeconditions. This synthetic pathway is a green protocol offering significant advantages, such as excellent yield of products in short reaction times, mild reaction conditions, minimization of chemical waste, easy preparation
本研究描述了一种高效,环保且简单的方法,该方法可合成磁铁矿-甲壳质(Fe 3 O 4 @甲壳质)作为绿色可回收催化剂,催化合成5-取代-1 H-四唑。Fe 3 O 4几丁质最初是使用水热合成法制备的。随后,使用诸如FT-IR,XRD,SEM,TEM,VSM和TGA等不同的光谱,显微镜和热重技术研究了制备的纳米催化剂的结构,形态和磁性。获得的结果表明,Fe 3 O 4几丁质纳米颗粒表现出均匀的立方体形状并且被良好地单分散。而且,磁测量显示合成的纳米催化剂具有超顺磁性特征。这种新型纳米催化剂的应用使得腈在无溶剂条件下通过腈与1-丁基-3-甲基咪唑鎓叠氮化物([bmim] [N 3 ])的反应可以合成多种四唑。该合成途径是绿色的方法,具有显着的优势,例如在短的反应时间内获得优异的产品收率,温和的反应条件,化学废物的最小化,催化剂的易于制备及其在不影响效率的情况下最多可循环使用六个循环。
A facile and efficient [bmim]N3 catalyzed direct oxidative esterification of arylaldehydes with alcohols
作者:Hassan Valizadeh、Mina Ahmadi
DOI:10.1016/j.crci.2012.08.004
日期:2012.11
Résumé Task-specific ionic liquid, [bmim]N3 was used as an effective catalyst and reaction medium for the direct oxidative esterification of arylaldehydes with alcohols. The oxidative esterification reaction of a variety of arylaldehydes took place smoothly with some primary and secondary alcohols in [bmim]N3. Satisfactory results were obtained with arylaldehydes containing electron withdrawing groups. Tertiary alcohols did not react under these conditions.
Pyridine based ionic fluoride for catalyzing indole and tetrazole formation
申请人:King Abdulaziz University
公开号:US10577327B2
公开(公告)日:2020-03-03
A pyridine based ionic liquid with a fluoride counter anion which catalyzes Fischer indole reaction and click chemistry. Methods of preparing the ionic liquid, and methods of utilizing the ionic liquid as a catalyst to synthesize indoles/indolenines and tetrazoles are also provided.