Cu(ii) immobilized on aminated epichlorohydrin activated silica (CAES): as a new, green and efficient nanocatalyst for preparation of 5-substituted-1H-tetrazoles
Novel Hybrid Thioamide Ligand Supported Copper Nanoparticles on SBA-15: A Copper Rich Robust Nanoreactor for Green Synthesis of Triazoles and Tetrazoles in Water Medium
作者:Fatemeh Pourhassan、Hossein Eshghi
DOI:10.1007/s10562-019-03031-y
日期:2020.5
groups via Willgerodt-Kindlerreaction. This porous material proved to be an effective host for the immobilization of inexpensive Cu(II) ions. The catalytically active Cu(I) species were generated automatically due to the reductive nature of thioamide modified surface of catalyst without use of any toxic reducing agents. The well stabilized Cu(I) species into the nano-channels of SBA-15 were used for synthesis
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
A simple and efficient protocol has been developed for the synthesis of 5-substituted 1H-tetrazole derivatives in good to excellent yields from various oximes and sodium azide by using indium(III) chloride as a Lewis acid catalyst. The present method has significant advantages, such as an inexpensive catalyst, low catalyst loading, mild reaction conditions, and simple experimental procedures.
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.