Ultrasound irradiation and green synthesized CuO-NiO-ZnO mixed metal oxide: An efficient sono/nano-catalytic system toward a regioselective synthesis of 1-aryl-5-amino-1<i>H</i>-tetrazoles
作者:Monireh Atarod、Javad Safari、Hamid Tebyanian
DOI:10.1080/00397911.2020.1761396
日期:2020.7.2
N-arylcyanamides and sodium azide using sono/nano-catalytic system. The mixed metal oxide nanoparticles (NPs) (CuO, NiO, and ZnO NPs) were prepared with utilizing aqueous leaves extracts of the Rheum ribes. In this study, the effect of the reaction condition was investigated on the catalytic activity and selectivity of mixed metal oxide NPs for the synthesis of aminotetrazole derivatives. In this regard, various
<i>Tert</i>-Butyl Nitrite Mediated Expeditious Methylsulfoxidation of Tetrazole-amines with DMSO: Metal-free Synthesis of Antifungal Active Methylsulfinyl-1<i>H</i>-tetrazole Derivatives
A tert‐butyl nitrite mediated methyl‐sulfoxidation of tetrazole‐amines in neat DMSO or methyl‐sulfinyl derivatives is revealed for the first time. The reaction exhibits good group tolerance, as well as highly selectivity to sulfinyl substitutions. This new protocol provides an expeditious and operationally simple procedure for C−S(O) bond construction. Preliminary bioactivity evaluation on selected
Tandem regioselective synthesis of tetrazoles and related heterocycles using iodine
作者:Ramesh Yella、Nilufa Khatun、Saroj Kumar Rout、Bhisma K. Patel
DOI:10.1039/c0ob01007c
日期:——
carbodiimides). The in situ generated heterocumulene on subsequent treatment with sodium azide at room temperature gave corresponding tetrazoles. The product regioselectivity for unsymmetrical 1,3-disubstituted thioureas was found to be correlated with the basicities (pKa's) of the parent amines attached to the thiourea. Aryl-sec-alkyl unsymmetrical thioureas gave thioamido guanidino products rather than the 5-aminotetrazoles
chitosan (as a linear polysaccharide) with a coppercomplex to expand the areas of its potential applications is an important scientific task. The present work reports the application of Cu(II)-5-amino-1H-tetrazole complex immobilized on modified magnetic chitosan as an effective catalyst (Fe3O4@Chitosan-Tet-Cu(II)) for C-N bond cross-coupling reaction between 5-aminotetrazole and aryl halides under
用铜络合物对壳聚糖(作为线性多糖)进行功能化以扩大其潜在应用领域是一项重要的科学任务。目前的工作报告了固定在改性磁性壳聚糖上的 Cu(II)-5-amino-1 H-四唑配合物作为CN 键交叉的有效催化剂 (Fe 3 O 4 @Chitosan-Tet-Cu(II)) 的应用。 5-氨基四唑和芳基卤化物在无配体条件下在二恶烷溶剂中的偶联反应。通过FT-IR、EDS、TEM、HRTEM、VSM、FFT、XRD、TG-DTG、ICP-MS和元素映射分析对制备的磁性纳米催化剂进行了表征。1-Aryl-5-amino-1 H-四唑以高产率生产。这种催化过程的优点包括方法简单、避免使用有害催化剂、反应时间短、产率高、易于处理和环境友好。Fe 3 O 4 @Chitosan-Tet-Cu(II) 催化剂即使在连续七次循环后仍表现出高效率和可重复使用性/可回收性,催化活性损失很小。