Indole-based distinctive chemosensors for ‘naked-eye’ detection of CN and HSO4−, associated with hydrogen-bonded complex and their DFT study
摘要:
Colorimetric detection of anions (HSO4- and CN-) was achieved via analyte triggered colour changing of the dipodal and tripodal sensors in CH3CN-H2O (1:1). The sensors exhibited very sharp visual colour changes and fluorescence quenching-enhancing effect upon addition of the HSO4- and CN-. The large downfield shift of the NH proton signals in H-1-NMR complexation studies and quantum chemical DFT calculations proved the formation of hydrogen-bonded complexes where no proton transfer mechanism was found.
BF<sub>3</sub>-grafted Fe<sub>3</sub>O<sub>4</sub>@Sucrose nanoparticles as a highly-efficient acid catalyst for syntheses of Dihydroquinazolinones (DHQZs) and Bis 3-Indolyl Methanes (BIMs)
core and grafting of boron trifluoride (BF3) onto the new surface. The catalytic activity of these nanoparticles was tested in syntheses of Dihydroquinazolinones (DHQZs) and Bis (3‐Indolyl) Methanes (BIMs) as two fruitful pharmaceutical structures. Acidic capacity, FT‐IR, XRD, VSM, TGA and SEM–EDX tests are carried out on such novel nanoparticles (NPs). Catalyst has shown more acidic capacity per one
当前的论文表示将蔗糖固定在Fe 3 O 4核上并将三氟化硼(BF 3)接枝到新表面上。在二氢喹唑啉酮(DHQZs)和双(3-吲哚基)甲烷(BIM)的合成中,作为两种卓有成效的药物结构,测试了这些纳米颗粒的催化活性。对这种新型纳米颗粒(NP)进行了酸性容量,FT-IR,XRD,VSM,TGA和SEM-EDX测试。与以前报道的磺化同系物相比,催化剂每1克NP的酸容量更高。
One-pot conversion of aromatic compounds to the corresponding bis(indolyl)methanes by the Vilsmeier–Haack reaction
Résumé Various electron-rich aromatics could be smoothly converted into the corresponding bis(indolyl)methanes in good to moderate yields by treatment of electron-rich aromatics with POCl3 and DMF, followed by treatment with indole at room temperature. The present article is the first report on a novel metal-free one-pot method for the preparation of bis(indolyl)methanes from electron-rich aromatics.
Sulfonated Organic Heteropolyacid Salts: Recyclable Green Solid Catalysts for the Highly Efficient and Green Synthesis of Bis(indolyl)methanes in Water
作者:Seyed M. Vahdat、Samad Khaksar、Saeed Baghery
DOI:10.2174/157017812800221690
日期:2012.2.1
In the present study, we introduce two nonconventional ionic liquids [MIMPS]3PW12O40 (a) and [TEAPS]3PW12O40 (b) as green solid acid catalysts for the efficient synthesis of bis(indolyl)methanes. The reaction of indole with aldehydes or ketones in water afforded the corresponding bis(indolyl)methanes in excellent yields. This reaction has been carried out in the presence of 1 mol% of catalysts at room temperature. The reusability of the catalysts was demonstrated by a six-run test. Additionally, the catalysts pose several advantages including mild reaction conditions, cleaner reactions and shorter reaction times.
Lithium Perchlorate Catalyzed Reactions of Indoles: An Expeditious Synthesis of Bis(indolyl)methanes
作者:Jhillu S. Yadav、Basi V. Subba Reddy、Ch. V. S. R. Murthy、G. Mahesh Kumar、Ch. Madan
DOI:10.1055/s-2001-12777
日期:——
Lithium perchlorate is found to catalyze efficiently the electrophilic substitution reactions of indoles with aldehydes and ketones in diethyl ether to afford the corresponding bis(indolyl)methanes in high yields. LiOTf is also found to be an efficient catalyst for the synthesis of these compounds.
An Efficient and Practical Process for the Synthesis of Bis(indolyl)methanes Catalyzed by Zirconium Tetrachloride
作者:Yong-Mei Wang、Zhan-Hui Zhang、Liang Yin
DOI:10.1055/s-2005-869959
日期:——
Zirconiumtetrachloride is used as a catalyst for the elec- trophilic substitution reaction of indole with aldehydes or ketones at ambienttemperature to afford the corresponding bis(indolyl)meth- anes in good to excellent yields.