磁性可分离的Fe 3 O 4 @几丁质是一种环保型纳米催化剂,在无溶剂条件下高效地绿色合成5取代的1 H-四唑†
摘要:
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。
Synthesis, molecular docking and xanthine oxidase inhibitory activity of 5-aryl-1H-tetrazoles
作者:Itrat Fatima、Humaira Zafar、Khalid Mohammed Khan、Syed Muhammad Saad、Sumaira Javaid、Shahnaz Perveen、M. Iqbal Choudhary
DOI:10.1016/j.bioorg.2018.04.021
日期:2018.9
5-Aryl-1H-tetrazoles (1–24) were synthesized and screened for their xanthine oxidase (XO) inhibitory activity using allopurinol as standard inhibitor (IC50 = 2.0 ± 0.01 µM). Six compounds 3, 4, 5, 9, 21, and 24 exhibited significant to weak activities with IC50 values in the range of 7.4–174.2 µM. Active compounds were further subjected to kinetic and molecular docking studies to deduce their modes
Cu(<scp>ii</scp>) immobilized on Fe<sub>3</sub>O<sub>4</sub>@APTMS-DFX nanoparticles: an efficient catalyst for the synthesis of 5-substituted 1H-tetrazoles with cytotoxic activity
functionalized magnetic nanoparticles (Cu(II)/Fe3O4@APTMS-DFX) as a novel magnetically recyclable heterogeneouscatalyst is able to catalyze the [3 + 2] cycloaddition reactions of various organic nitriles with sodiumazide. Using this method, a series of 5-substituted-1H-tetrazoles under mild conditions in DMSO were prepared. The reaction involves mild reaction conditions with efficient transformation
Cu(<scp>ii</scp>) immobilized on aminated epichlorohydrin activated silica (CAES): as a new, green and efficient nanocatalyst for preparation of 5-substituted-1H-tetrazoles
作者:Nasrin Razavi、Batool Akhlaghinia
DOI:10.1039/c4ra15148h
日期:——
Reusable nanocatalyst was prepared and characterized an efficient and environmentally benign method of 5-substituted-1H-tetrazole synthesis was introduced.
A rapid metal free synthesis of 5-substituted-1H-tetrazoles using cuttlebone as a natural high effective and low cost heterogeneous catalyst
作者:Sara S. E. Ghodsinia、Batool Akhlaghinia
DOI:10.1039/c5ra08147e
日期:——
5-substituted-1H-tetrazoles is described by [3 + 2] cycloadditionreaction of nitriles with sodium azide. The reaction was catalyzed by cuttlebone in DMSO at 110 °C. Cycloadditionreaction of nitriles with sodium azide happened in the presence of mesoporous cuttlebone by “electrophilic activation” of nitriles through hydrogen bond formation between the cuttlebone and nitrile. Cuttlebone as a natural low cost
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.