A mild, simple and convenient procedure for the synthesis of bis(indolyl)methane derivatives was described using N-sulfonic acid poly(4-vinylpyridinium) chloride as an efficient, cheap, and reusable catalyst under mild conditions.
V
<sub>2</sub>
O
<sub>5</sub>
based quadruple nano‐perovskite as a new catalyst for the synthesis of bis and tetrakis heterocyclic compounds
作者:Tamer K. Khatab、Amr Mohamed Abdelghany、Hanan A. Soliman
DOI:10.1002/aoc.4783
日期:2019.5
In this article, we presented a novel, efficient and facile approach for using strontium titanate supported catalyst in organic synthesis. Bis and tetrakis of coumarin, indole and xanthene derivatives can effortlessly have prepared using V2O5/perovskite nanoparticles (NPs) under solvent‐free condition. V2O5/perovskite in (NPs) was prepared and identified using Fourier transform infrared spectroscopy
在本文中,我们提出了一种新颖,高效且简便的方法,用于在有机合成中使用钛酸锶负载型催化剂。使用V 2 O 5 /钙钛矿纳米颗粒(NPs)在无溶剂条件下可以轻松制备香豆素,吲哚和and吨衍生物的二元和四元化合物。V 2 O 5使用傅里叶变换红外光谱(FTIR),X射线衍射(XRD)和支持能量色散X射线的扫描电子显微镜(SEM / EDAX)制备和鉴定/钙钛矿(NPs)。由强XRD峰计算得出的晶体尺寸与透射电子显微镜研究结果相符,在50-60 nm之间。EDAX分析和作图图像揭示了合成催化剂中所有成分的均匀分布及其计算的比率。
PEG-SO<sub>3</sub>H as a Catalyst for the Preparation of Bis-Indolyl and Tris-Indolyl Methanes in Aqueous Media
作者:V. Jhansi Rani、K. Veena Vani、C. Venkata Rao
DOI:10.1080/00397911.2010.551700
日期:2012.7.15
Abstract A facile, efficient, and green synthesis of bis-indolyl and tris-indolyl methanes has been developed by one-pot condensation of indole with structurally diverse aldehydes and ketones in the presence of poly(ethylene glycol)–bound sulfonicacid as catalyst at room temperature. GRAPHICAL ABSTRACT
Two novel binuclear sulfonic-functionalized ionic liquids: Influence of anion and carbon-spacer on catalytic efficiency for one-pot synthesis of bis(indolyl)methanes
from pyrazinium, piperazinium, benzimidazolium, imidazolium mono- or di-cation containing chloride and hydrogen sulfate as counter anion under optimized conditions. It was proved that the new ionic liquids containing two sulfonic imidazole moieties with four-carbon spacer as well as hydrogen sulfate as acidic counter anion were superior to the previously reported ionic liquids.
合成了两种新的具有四碳间隔基的双核磺酸官能化离子液体,并通过FTIR,MS,1 H和13对其结构进行了表征1 H NMR; 然后确定特定任务的新型离子液体水溶液的一些物理性质和pH值。研究了它们在温和条件下的双溶剂催化活性,以合成双(吲哚基)甲烷。在优化的条件下,将这些离子液体的催化活性与衍生自吡嗪鎓,哌嗪鎓,苯并咪唑鎓,咪唑鎓单或二阳离子的氯化物和硫酸氢盐作为抗衡阴离子的某些离子液体进行了比较。事实证明,含有两个带有四个碳间隔基的磺酸咪唑部分以及硫酸氢盐作为酸性抗衡阴离子的新型离子液体优于以前报道的离子液体。
In situ generation of Iron(<scp>iii</scp>) dodecyl sulfate as Lewis acid-surfactant catalyst for synthesis of bis-indolyl, tris-indolyl, Di(bis-indolyl), Tri(bis-indolyl), tetra(bis-indolyl)methanes and 3-alkylated indole compounds in water
Iron(III) dodecyl sulfate as Lewis acid-surfactant catalyst was prepared in situ and effectively used in the synthesis of bis(indolyl)methanes and Michael reactions of indoles with α,β-unsaturated carbonyl compounds in water. Also, this method was used for the synthesis of 1,1,3-tri-indolyl compounds, producing good to excellent yield at room temperature.