Copper and nickel immobilized on cytosine@MCM‐41: as highly efficient, reusable and organic–inorganic hybrid nanocatalysts for the homoselective synthesis of tetrazoles and pyranopyrazoles
In this work, a green approach is reported for efficientsynthesis of biologically active tetrazole and pyranopyrazole derivatives in the presence of Cu‐Cytosine@MCM‐41 and Ni‐Cytosine@MCM‐41 (copper (II) and nickel (II) catalyst on the modified MCM‐41 using cytosine). The synthesis of tetrazoles and pyranopyrazoles in the presence of these catalysts was performed in greensolvents such as water or
First report of the direct supporting of palladium-arginine complex on boehmite nanoparticles and application in the synthesis of 5-substituted tetrazoles
作者:Bahman Tahmasbi、Arash Ghorbani-Choghamarani
DOI:10.1002/aoc.3644
日期:2017.7
Boehmite nanoparticles are aluminium oxide hydroxide (γ‐AlOOH) particles, which were prepared using a simple and inexpensive procedure in water at room temperature and further modified using arginine. Subsequently palladium particles were immobilized on their surface to prepare Pd‐Arg@boehmite. This novel nanostructured compound was fully characterized using thermogravimetric analysis, X‐ray diffraction
Anchoring Ni (II) on Fe<sub>3</sub>
O<sub>4</sub>
@tryptophan: A recyclable, green and extremely efficient magnetic nanocatalyst for one-pot synthesis of 5-substituted 1<i>H</i>
-tetrazoles and chemoselective oxidation of sulfides and thiols
prepared nanocatalyst was applied for the oxidation of sulfides, oxidative coupling of thiols and synthesis of 5‐substituted 1H‐tetrazoles. The use of non‐toxic, green and inexpensive materials, easy separation of magnetic nanoparticles from a reaction mixture using a magnetic field, efficient and one‐pot synthesis, and high yields of products are the most important advantages of this nanocatalyst.
通过将镍作为过渡金属固定在色氨酸包覆的Fe 3 O 4纳米颗粒上,成功地合成了绿色,新颖且极其高效的纳米催化剂。使用傅立叶变换红外光谱,透射电子显微镜,扫描电子显微镜,能量色散X射线光谱,热重分析,电感耦合等离子体发射光谱,振动样品磁力分析和X射线衍射对这种纳米结构材料进行了表征。制备的纳米催化剂可用于硫化物的氧化,硫醇的氧化偶联和5取代1 H的合成-四唑。这种无毒,绿色和廉价的材料的使用,使用磁场易于从反应混合物中分离磁性纳米颗粒,高效且一锅法合成以及高收率的产品是这种纳米催化剂的最重要优势。
Immobilization of a nickel complex onto functionalized Fe3O4 nanoparticles: a green and recyclable catalyst for synthesis of 5-substituted 1H-tetrazoles and oxidation reactions
gravimetric analysis and vibrating sample magnetometer measurements. The catalytic behavior of the prepared nanohybrid as an efficient catalyst was successfully probed in the oxidation of sulfides, oxidative coupling of thiols and synthesis of 5-substituted1H-tetrazoles. This method was found to have significant advantages, including high yield, green reaction conditions, short reaction time, easy separation
Boehmite nanoparticles were immobilized with a new type of nickel complex and applied for the synthesis of 5-substituted 1H-tetrazole derivatives in PEG-400.