Click approach to the novel 1,2,3-triazolium phosphotungstate organic–inorganic hybrids for the highly promoted synthesis of spirooxindoles
作者:Layla A. Taib、Mosadegh Keshavarz、Abolfath Parhami
DOI:10.1007/s11164-021-04632-2
日期:2022.2
SO3H-functionalized ionic hybrid catalysts have a cationic organic triazolium with phosphotungstate anion and are water-soluble with appropriate thermal stability. Their catalytic activity was explored for the synthesis of spirooxindoles via the three‐component reaction of 1,3‐dicarbonyl compounds, barbituric acid, and isatin derivatives. The synthesis of desired spirooxindole products was performed in acceptable
Ion-pair immobilization of l-prolinate anion onto cationic polymer support and a study of its catalytic activity for one-pot synthesis of spiroindolones
作者:Mosadegh Keshavarz
DOI:10.1007/s13738-015-0765-y
日期:2016.3
of l-proline with amberlite IRA900OH at 60 °C. l-Proline anion was exchanged with hydroxyl anion and immobilized via ionic interaction between carboxylate group of l-prolinate and quaternary ammonium cation of the cationic amberlite support. The prepared heterogeneousorganocatalyst was well characterized using FTIR, TGA, DTG, XRD and elemental analysis techniques. This heterogeneous catalyst was used
引入了一种新颖的清洁简单的技术,用于1-脯氨酸有机催化剂的杂化。该程序基于将1-脯氨酸非共价固定在阴离子交换树脂amberlite IRA900OH(AmbIRA900OH)的表面上,作为一种有效,便宜且可商购的阳离子聚合物载体。通过在60℃下用琥珀石IRA900OH处理1-脯氨酸的MeOH / H 2 O溶液来实现1-脯氨酸在琥珀石IRA900OH表面上的离子对固定。l-脯氨酸阴离子与羟基阴离子交换并通过l的羧酸根之间的离子相互作用固定-阳离子扁长石载体的脯氨酸和季铵阳离子。使用FTIR,TGA,DTG,XRD和元素分析技术对制备的多相有机催化剂进行了很好的表征。该多相催化剂被用作合成螺螺吲哚酮衍生物的有效可回收催化剂,并获得了良好的优良产率。5次运行后,催化剂的效率几乎完全保持,并且有机催化剂向反应混合物中的浸出量非常低。
Zinc(II)‐poly(urea‐formaldehyde) supported on magnetic nanoparticles: A hybrid nanocatalyst for green synthesis of spiropyrans, spiroxanthenes, and spiropyrimidines
作者:Mohammad Ali Bodaghifard、Zahra Mousavi
DOI:10.1002/aoc.5859
日期:2020.10
Zinc‐poly(urea‐formaldehyde) supported on magneticnanoparticles (MNPs@SiO2@PUF@Zn) was successfully used for the synthesis of spirooxindolopyran and spirooxindoloxanthene derivatives in aqueous medium as an environmentally benign condition. High yields, short reaction times, green solvent, reusability without significant reduction in catalytic activity, and simple separation of the catalyst using an external magnet
将金属离子固定在无机载体上具有非常有趣的生物学,工业和催化应用。在这项研究中,通过将醋酸锌固定在磁性CoFe 2 O 4 @SiO 2上负载的聚脲甲醛表面上,成功制造了CoFe 2 O 4 @SiO 2 @ PUF @ Zn(OAc)2纳米结构。纳米颗粒通过一层一层的组装。杂化纳米颗粒的结构通过傅里叶变换红外光谱,X射线衍射,热重分析,能量色散X射线光谱,电感耦合等离子体原子发射光谱,振动样品磁力分析,Brunauer-Emmett-Teller表面积分析,扫描进行表征电子显微镜和透射电子显微镜。磁性纳米颗粒(MNPs @ SiO 2)上负载的锌-聚(脲醛)(PUF @ Zn)作为一种环境友好的条件,已成功地用于在水性介质中合成螺并氧杂并吡喃和螺并恶多恶并蒽衍生物。该方法的优点是高收率,较短的反应时间,绿色溶剂,可重用性而不会显着降低催化活性,使用外磁体简单地分离催化剂以及环境相容性。
Efficient and Convenient Polyethylene Glycol (PEG)-Mediated Synthesis of Spiro-oxindoles
作者:Harshadas Mitaram Meshram、Dachepally Aravind Kumar、Busam Ramalinga Vara Prasad、Palakuri Ramesh Goud
DOI:10.1002/hlca.200900273
日期:2010.4
Polyethyleneglycol (PEG) has been reported as an efficient and convenient medium for the three‐component synthesis for spiro‐oxindole.