Results 21 to 30 of about 4,473 (184)

Multicomponent synthesis of novel azo-linked 9-Aryl-1H-xanthene-1,8(2H)-diones using ionic liquid [BDBDMIm]HSO4 [PDF]

شیمی کاربردی روز, 2019
The synthesis of ten novel azo dyes derived from 9-Aryl-1H-xanthene-1,8(2H)-dione derivatives from one equivalent of azo-linked salicylaldehydes and two equivalent of dimedone in the presence of 3,3'-(butane-1,4-diyl)bis(1,2-dimethyl-1H-imidazol-3-ium ...
mohammad nikpassand, leila Zare Fekri
doaj   +1 more source

Synthesis and One‐Electron Reduction of Donor‐Acceptor‐Stabilized SiII–EII–SiII Trimetallylenes (E = Ge, Sn, Pb)

Angewandte Chemie, EarlyView.
The first isolable trimetallylenes (SiII)2EII (E = Ge, Sn, Pb) with pπ‐type silanylidenyl donors have been synthesized, having donor–acceptor electronic structures that give rise to near‐infrared absorption and enable access to bis(silanylidenyl)‐supported GeI and SnI radical anions upon one‐electron reduction with elemental potassium. ABSTRACT Herein,
Chaopeng Hu, Shenglai Yao, Christian Lorent, Matthias Driess   +3 more
wiley   +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

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

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

Synthesis, resolution and crystal structures of two enantiomeric rhodamine derivatives

Acta Crystallographica Section E: Crystallographic Communications, 2017
The title molecule, rac-6′-bromo-3′-diethylamino-3H-spiro[2-benzofuran-1,9′-xanthen]-3-one, C24H20BrNO3, was synthesized and the two enantiomers which formed were separated. The structures of all three compounds were determined and compared with those of
Clifton J. Stephenson, Joel T. Mague, Nathaniel Kamm, Nathalie Aleman, Dayla Rich, Quynh-Nhu Dang, Ha Van Nguyen   +6 more
doaj   +1 more source

Synthesis and biological evaluation of 9-aryl-1,8-dioxo-octahydroxanthene derivatives as antileishmanial agents

Results in Chemistry, 2023
In the current research, we designed and synthesized various derivatives of 9-aryl-1,8-dioxo-octahydroxanthene using flow chemistry technique and explored in vitro study for antileishmanial activity against the promastigote as well as amastigote form of ...
Kamlesh Lodha, Deepak Wavhal, Namdeo Bhujbal, Priyanka Mazire, Sneha Bhujbal, Ashlesha Korde, Kamini Bagul, Amit Roy, Rohan Meshram, Vaishali Shinde   +9 more
doaj   +1 more source

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