Results 21 to 30 of about 1,749 (157)

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

Ozonation of Xanthene [PDF]

Bulletin of the Chemical Society of Japan, 1984
Abstract The ozonation of xanthene was studied using an oxygen stream. Ozone attacks the methylene group of xanthene via a 1,3-dipolar insertion reaction to give the hydrotrioxide intermediate, followed by a loss of singlet oxygen to form xanthydrol.
Masaki Matsui, Yoshihiko Miyamoto, Katsuyoshi Shibata, Yoshimi Takase   +3 more
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Methyl 9H-xanthene-9-carboxylate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2008
The title compound, C(15)H(12)O(3), was obtained unintentionally as the by-product of an attempted recrystallization from methanol of propantheline bromide, an anti-muscarinic drug. The xanthone unit is folded, with a dihedral angle of 24.81 (9)° between the benzene rings.
Douglas R. MacFarlane, Jelena Turanjanin, Pamela M. Dean   +2 more
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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

A Convenient Preparation of Xanthene Dyes. [PDF]

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Youjun, Yang, Jorge O, Escobedo, Alexander, Wong, Corin M, Schowalter, Michael C, Touchy, Lijuan, Jiao, William E, Crowe, Frank R, Fronczek, Robert M, Strongin   +8 more
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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

(E)-2-Methoxy-9-(2-methoxy-9H-xanthen-9-ylidene)-9H-xanthene [PDF]

Acta Crystallographica Section E Structure Reports Online, 2013
The title compound, C28H20O4, was synthesized by a bimolecular Zn-HCl reduction in glacial acetic acid using the meth-oxy-substituted xanthone as a starting material. The crystal structure shows that the 2,2'-meth-oxy-bixanthenyl-idene unit is an E-type conformation anti-folded conformer. The mol-ecule lies on an inversion center. The meth-oxy group is
Xiang-Yu Tian, Qin-Hua Song
openaire   +3 more sources

Xanthene Dyes

, 2014
Citation: 'xanthene dyes' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.X06695 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial
Paul Wright, Updated by Staff
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The Synthesis of Substituted Tetrahydro‐1H‐xanthen‐1‐ones and Xanthenes.

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Mahesh L. Patil, Hanumant B. Borate
openaire   +1 more source