Results 201 to 210 of about 5,075 (257)
Role of DKxanthenes in <i>Myxococcus</i>-Nematode Interactions. [PDF]
J Microbiol BiotechnolHyun H, Kim G, Park C, Ka Y, Cho K.
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Synthesis and in vitro study of 14-aryl-14H-dibenzo[a.j]xanthenes as cytotoxic agents
Bioorganic and Medicinal Chemistry Letters, 2009 A simple and expedient method for the synthesis of a series of 14-aryl-14H-dibenzo[a.j]xanthenes is described through a one-pot condensation of b-naphthol with aryl aldehydes catalysed by TaCl5 under solvent-free conventional heating.
Asish K Bhattacharya +2 more
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ChemistrySelect, 2023
Abstract Xanthene dyes exhibit remarkable photophysical properties and photostability. Their ability to switch fluorescence on/off depending on the external environment makes them a promising candidate for imaging/sensing/tracking/labeling probes. However, their emission ≤600 nm and Stokes shift ∼34 nm restrict their use in biological
Zeba Khan, Nagaiyan Sekar
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Abstract Xanthene dyes exhibit remarkable photophysical properties and photostability. Their ability to switch fluorescence on/off depending on the external environment makes them a promising candidate for imaging/sensing/tracking/labeling probes. However, their emission ≤600 nm and Stokes shift ∼34 nm restrict their use in biological
Zeba Khan, Nagaiyan Sekar
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Acta Crystallographica Section C Crystal Structure Communications, 1996
In xanthene-9-carboxylic acid, C14H10O3, hydrogen bonding is of the cyclic dimer type but involves two crystallographically inequivalent molecules and does not occur about a center of symmetry. The carboxylic H atoms are ordered. The dihedral angle (fold angle) of the xanthene core is 14.2 (1) degree for molecule A and 11.3 (2) degrees for molecule B ...
A C, Blackburn, A J, Dobson, R E, Gerkin
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In xanthene-9-carboxylic acid, C14H10O3, hydrogen bonding is of the cyclic dimer type but involves two crystallographically inequivalent molecules and does not occur about a center of symmetry. The carboxylic H atoms are ordered. The dihedral angle (fold angle) of the xanthene core is 14.2 (1) degree for molecule A and 11.3 (2) degrees for molecule B ...
A C, Blackburn, A J, Dobson, R E, Gerkin
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Xanthene-Bridged Cofacial Bisporphyrins
Inorganic Chemistry, 2000The synthesis and characterization of cofacial bisporphyrins juxtaposed by xanthene-bridged pillars are presented. The one-pot preparation of the xanthene dialdehyde avoids the lengthy bridge synthesis accompanying other cofacial porphyrin systems, thus allowing for the facile preparation of homobimetallic zinc (10), copper (11), and nickel (12 ...
C J, Chang +4 more
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Chromatography of Xanthene Dyes
Nature, 1960RECENTLY, Lima and Pieroni1have directed attention to the heterogeneous character of the dye rose bengal, which, when labelled with iodine-131, is used in tests of hepatic function2,3. Applying the ethanol–ammonia solvent system of Ishida et al. 4, they claim resolution of this dye into four components, three coloured and one colourless.
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Revista de Chimie, 2008
This paper examined the synthesis pathways for new compounds starting from raw materials on the anhydride type reacting with polyphenols. The compounds have been characterized through spectral analysis, with estimation yields for each reaction. Basic material syntheses are also presented.
Lucian Iscrulescu +4 more
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This paper examined the synthesis pathways for new compounds starting from raw materials on the anhydride type reacting with polyphenols. The compounds have been characterized through spectral analysis, with estimation yields for each reaction. Basic material syntheses are also presented.
Lucian Iscrulescu +4 more
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CLEAVAGE OF XANTHENE ETHERS: A NEW ROUTE TO 9-SUBSTITUTED XANTHENES
Canadian Journal of Chemistry, 19649,9-(Tetrachloro-o-phenylenedioxy) xanthene (IIa) and its thio-analogue (IIb) are cleaved by hydrazines to give the corresponding hydrazones of xanthone and thiaxanthone, respectively, together with tetrachlorocatechol. The unsaturated nitriles (Va), (Vb), and (Vc) are produced similarly by the action of malononitrile and cyanoacetic ester ...
N. Latif, I. Fathy, N. Mishriky
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