Results 21 to 30 of about 2,334 (173)

Fe3o4 nanoparticles: A highly efficient and easily reusable catalyst for the one-pot synthesis of xanthene derivatives under solvent-free conditions [PDF]

Journal of the Serbian Chemical Society, 2013
Magnetically separable Fe3O4 nanoparticles supply environmentally friendly procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene and 1,8-dioxo-octahydro-xanthene derivatives.
Ghasemzadeh Ali Mohammad, Safaei-Ghomi Javad, Zahedi Safura   +2 more
doaj   +1 more source

Ag Nanoparticles Stabilized on Cyclodextrin Polymer Decorated with Multi-Nitrogen Atom Containing Polymer: An Efficient Catalyst for the Synthesis of Xanthenes

Molecules, 2020
In attempt to broaden the use of cyclodextrin polymer for catalytic purposes, a novel covalent hybrid system was prepared through growth of multi-nitrogen atom containing polymer (PMelamine) derived from reaction of ethylenediamine and 2,4,6-trichloro-1 ...
Samahe Sadjadi, Fatemeh Ghoreyshi Kahangi, Masoumeh Dorraj, Majid M. Heravi   +3 more
doaj   +1 more source

Synthesis of Xanthones, Thioxanthones and Acridones by a Metal-Free Photocatalytic Oxidation Using Visible Light and Molecular Oxygen

Molecules, 2021
9H-Xanthenes, 9H-thioxanthenes and 9,10-dihydroacridines can be easily oxidized to the corresponding xanthones, thioxanthones and acridones, respectively, by a simple photo-oxidation procedure carried out using molecular oxygen as oxidant under the ...
Alejandro Torregrosa-Chinillach, Rafael Chinchilla   +1 more
doaj   +1 more source

An Insight Into the Potentiation Effect of Potassium Iodide on aPDT Efficacy

Frontiers in Microbiology, 2018
Antimicrobial photodynamic therapy (aPDT) is gaining a special importance as an effective approach against multidrug-resistant strains responsible of fatal infections. The addition of potassium iodide (KI), a non-toxic salt, is recognized to increase the
Cátia Vieira, Ana T. P. C. Gomes, Mariana Q. Mesquita, Nuno M. M. Moura, M. Graça P. M. S. Neves, M. Amparo F. Faustino, Adelaide Almeida   +6 more
doaj   +1 more source

Electrochemical Regioselective Cross-Dehydrogenative Coupling of Indoles with Xanthenes

, 2021
An electrochemical cross-dehydrogenative coupling of indoles with xanthenes has been established at room temperature. This coupling reaction could proceed in the absence of any catalyst or external oxidant, and generate the indole derivatives in moderate
Pinhua Li (1457875), Hongji Li (1504102), Tao Miao (1652005), Hongqiang Liu, Hongqiang Liu (1923511), Hongji Li, Hui Gao (169623), Xinyu Chen, Tao Miao, Pinhua Li, Hui Gao, Xinyu Chen (47670)   +11 more
core   +1 more source

Design, Synthesis and Antiviral Potential of 14-Aryl/Heteroaryl-14<em>H</em>-dibenzo<em>[a,j]</em>xanthenes Using an Efficient Polymer-Supported Catalyst

Molecules, 2012
Polyethyleneglycol bound sulfonic acid (PEG-OSO₃H), a chlorosulphonic acid-modified polyethylene glycol was successfully used as an efficient and eco-friendly polymeric catalyst in the synthesis of 14-aryl/heteroaryl-14<em>H ...
Ola Lasekan, Mungara Anil Kumar, Palanisamy Arulselvan, Shaik Ibrahim Khalivulla, Balam Satheesh Krishna, Kalla Reddi Mohan Naidu   +5 more
doaj   +1 more source

Divergent synthesis of fused Benzo-xanthene and oxazine derivatives via Cu-catalyst

Journal of Saudi Chemical Society, 2022
Cu-Cu2O combination showed synergic effects in catalyzing intramolecular Ullmann coupling reaction for halo-Betti bases to afford fused benzo-xanthenes from both electron-rich and electron-deficient aromatic systems in good yield under mild reaction ...
Meshari A Alsharif, Naseem Ahmed, Mohammed Issa Alahmdi, Sayeed Mukhtar, Humaira Parveen, Rami J. Obaid, Abdulraheem S.A. Almalki   +6 more
doaj   +1 more source

Defined Dinuclear Nickel Sites on Mesoporous Silica Translate Molecular Surface Mimics to Heterogeneous Catalysis

Angewandte Chemie, EarlyView.
The cooperative reactivity characteristic of molecular dinuclear nickel complexes is transferred to mesoporous silica through a systematic immobilization strategy. The resulting material preserves the key features of the bimetallic motif within a robust heterogeneous framework, demonstrating how molecular design principles can be translated into well ...
Jitpisut Poolwong, Adrian Jenner, Eric Juriatti, Mustafa Turan, Manfred Manßen   +4 more
wiley   +2 more sources

Supramolecular Mechanophore Additives Enable Mechanochromic Hydrogels

Angewandte Chemie, EarlyView.
A supramolecular loop‐forming mechanophore featuring a quencher and an emitter is incorporated as a water‐soluble macromolecular additive into hydrogels. In the stress‐free state, intramolecular charge‐transfer interactions fold the loop and quench fluorescence.
Iulia Scarlat, Jess M. Clough, Christoph Weder   +2 more
wiley   +2 more sources

A Facile and Catalyst-free Synthesis of Hexahydroacridine-1,8(2H,5H )-dione and Octahydroacridin-10(1H )-yl)thiourea Derivatives: Inter- and Intramolecular Aza-Michael addition

Heterocyclic Communications, 2020
An easy and convenient technique for the one-pot synthesis of novel compounds of hexahydroacridine-1,8(2H,5H)-dione and octahydroacridin-10(1H)-yl) thiourea derivatives has been developed by the reaction of the octahydro-1H-xanthenes with hydroxylamine ...
Pesyan Nader Noroozi, Akhteh Narmin, Batmani Hana, Anıl Barış, Şahin Ertan   +4 more
doaj   +1 more source