Results 31 to 40 of about 12,440 (225)

Xanthenedione derivatives, new promising antioxidant and acetylcholinesterase inhibitor agents [PDF]

, 2014
Natural and synthetic xanthone derivatives are well-known for their ability to act as antioxidants and/or enzyme inhibitors. This paper aims to present a successful synthetic methodology towards xanthenedione derivatives and the study of their ...
Barreto, Maria do Carmo, Leal, Stephanie B., Pinto, Diana C. G. A., Seca, Ana M. L., Silva, Artur M. S.   +4 more
core   +2 more sources

3′,6′-Bis(diethylamino)-3H-spiro[2-benzothiophene-1,9′-xanthene]-3-thione

Acta Crystallographica Section E, 2008
The title compound, C28H30N2OS2, was obtained by thionation of 3′,6′-bis(diethylamino)-3H-spiro[isobenzofuran-1,9′-xanthene]-3-one with 2,4-bis(p-methoxyphenyl)-1,3-dithiadiphosphetane disulfide (Lawesson's reagent).
Bing-Yuan Su, Xin-Qi Zhan, Jian-Nan Guo, Yue-Feng Zhou, Hong Zheng   +4 more
doaj   +1 more source

9-(7-Fluoro-4-oxo-4H-chromen-3-yl)-3,3,6,6-tetramethyl-2,3,4,5,6,7,8,9-octahydro-1H-xanthene-1,8-dione

Acta Crystallographica Section E, 2012
In the title compound, C26H25FO5, the terminal cyclohexane rings of the xanthene ring system adopt half-boat conformations. The 4H-chromene ring make a dihedral angle of 87.94 (5)° with the xanthene ring system and its carbonyl O atom ...
Mohammad Asad, Chuan-Wei Oo, Hasnah Osman, Hoong-Kun Fun, Suhana Arshad   +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
openaire   +2 more sources

Asymmetric and Reduced Xanthene Fluorophores: Synthesis, Photochemical Properties, and Application to Activatable Fluorescent Probes for Detection of Nitroreductase

Molecules, 2019
Xanthene fluorophores, including fluorescein, rhodol, and rhodamines, are representative classes of fluorescent probes that have been applied in the detection and visualization of biomolecules.
Kunal N. More, Tae-Hwan Lim, Julie Kang, Hwayoung Yun, Sung-Tae Yee, Dong-Jo Chang   +5 more
doaj   +1 more source

Crystal structure, Hirshfeld surface and frontier molecular orbital analysis of 9-(3-bromo-4-hydroxy-5-methoxyphenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione

Acta Crystallographica Section E: Crystallographic Communications, 2021
In the fused ring system of the title compound, C24H27BrO5, the mean plane and maximum deviations of the central pyran ring are 0.0384 (2) and 0.0733 (2) Å, respectively.
N. Suresh Babu, V. Sughanya, D. Praveenkumar, M. L. Sundararajan   +3 more
doaj   +1 more source

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

9-(2-Hydroxy-6-oxocyclohex-1-en-1-yl)-2,3,4,9-tetrahydro-1H-xanthen-1-one

Acta Crystallographica Section E, 2013
In the xanthene ring system in the title compound, C19H18O4, the 4H-pyran ring has a maximum deviation of 0.110 (2) Å from planarity and the cyclohexene ring exhibits a puckered conformation [puckering parameters QT = 0.452 (3 ...
Shaaban K. Mohamed, Mehmet Akkurt, Antar A. Abdelhamid, Aamer Saeed, Ulrich Flörke   +4 more
doaj   +1 more source

9-(4-Hydroxybutyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione

Molbank, 2016
The title compound 9-(4-hydroxybutyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione was synthesized in 72% yield through a simple, convenient and environmentally friendly one-pot reaction between dimedone and 3,4-dihydro-2H-pyran in
Camilo A. Navarro, Cesar Sierra, Cristian Ochoa-Puentes   +2 more
doaj   +1 more source