描述了一种方便的程序,用于制备1-(1-丙磺酸基)-3-甲基咪唑鎓硫氰酸盐作为新型的布朗斯台德酸性离子液体硫氰化剂和高效的多相催化剂。该催化剂用于在温和的H2O2和EtOH:H2O(1:1 v / v)的氧化剂存在下对吲哚,苯胺,吡咯及其衍生物(芳族和杂芳族有机化合物)进行区域选择性硫氰化。这些反应在温和且简单的条件下进行,从而以高产率和短反应时间提供区域选择性产物。
Ferric(III) Chloride-Promoted Electrophilic Thiocyanation of Aromatic and Heteroaromatic Compounds
作者:J. S. Yadav、B. V. Reddy、A. D. Krishna、Ch. Suresh Reddy、A. V. Narsaiah
DOI:10.1055/s-2005-861852
日期:——
Indoles, oxindoles and aromatic amino compounds undergo smooth thiocyanation with ammonium thiocyanate in the presence of anhydrous FeCl 3 in dichloromethane under mild conditions to afford the corresponding 3-indolyl and 4-aryl thiocyanates, respectively, in high yields with excellent selectivity. The use of ferric chloride makes it quite simple, more convenient and practical. This new method offers
Determination of the promoting effect of nano SiO<sub>2</sub>and H<sub>3</sub>PO<sub>4</sub>@nano SiO<sub>2</sub>in the thiocyanation of<i>N</i>-containing aromatic compounds under solvent-free conditions
作者:Kobra Nikoofar、Samareh Gorji
DOI:10.1080/17415993.2015.1004066
日期:2015.3.4
Silica nanoparticles/ammonium thiocyanate (nano SiO2/NH4SCN) and H3PO4 embedded on nano silica (H3PO4@nano SiO2) in the presence of NH4SCN were found to be effective systems for the thiocyanation of some arylamines and indoles to afford their corresponding thiocyanated adducts at 70 degrees C under solvent-free conditions. The recovery and reusability of nano SiO2 as a prompting system have been investigated. A simple procedure for the synthesis of H3PO4@nano SiO2 has also been represented. In addition, a plausible mechanism of thiocyanation has also been suggested.
AlCl<sub>3</sub>-Promoted Thiocyanation of <i>N</i>-Containing Aromatic and Heteroaromatic Compounds Under Solvent-Free Conditions
作者:Kobra Nikoofar、Samareh Gorji
DOI:10.1080/10426507.2014.978321
日期:2015.7.3
Aluminum chloride/Ammonium thiocyanate (AlCl3/NH4SCN) was found to be an effective system for the thiocyanation of some arylamines and indoles to afford the corresponding thiocyanated adducts at room temperature under solvent-free conditions. The efficacy of this combined reagent was also examined in the thiocyanation of pyrrole and isatin. A plausible mechanism of thiocyanation has also been suggested.
Electrochemical thiocyanation of nitrogen-containing aromatic and heteroaromatic compounds
作者:Lida Fotouhi、Kobra Nikoofar
DOI:10.1016/j.tetlet.2013.02.106
日期:2013.6
An efficient and convenient anodic thiocyanation of nitrogen-containing (hetero)aromatic compounds is described under constant current conditions in the presence of ammonium thiocyanate in methanol at room temperature. We have examined the in situ thiocyanation of various aromatic compounds in the presence of electrochemically generated thiocyanogen at a graphite electrode (the anode) in an undivided cell. (C) 2013 Elsevier Ltd. All rights reserved.