Topic
Xanthene
About: Xanthene is a research topic. Over the lifetime, 2132 publications have been published within this topic receiving 34803 citations. The topic is also known as: Xanthene & dibenzo[a,e]pyran.
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TL;DR: An efficient one-pot condensation of β-naphthol, aldehydes, and cyclic 1,3-dicarbonyl compounds has been achieved with molecular iodine as a catalyst, thus a variety of tetrahydrobenzo [a]xanthene-11-one and diazabenzo[a]anthracene-9,11-dione derivatives were prepared in good yields.
18 citations
TL;DR: In this article, it was proved that xanthene dyes had an inhibitory effect on human UGT1A6 activity by the combination of Xanthene structure and halogens on its.
Abstract: We have reported that erythrosine (ET), a xanthene dye, inhibited uridine 5-diphosphate (UDP)glucuronosyltransferase 1A6 (UGT1A6). In order to clarify the structure-inhibition relationships of these xanthene dyes, the inhibitory effect of xanthene dye on human UGT1A6 activity was investigated, such as acid red (AR), ET, phloxine (PL), and rose bengal (RB). ET, PL, and RB strongly inhibited human UGT1A6 activity, with IC50 values = 0.05, 0.04, and 0.015 mM, respectively. Meanwhile, AR had almost no effect (IC50 value = 1.7 mM). ET, PL and RB have four halogen atoms on their xanthene backbone, unlike AR. Meanwhile, some contrast media with high halogens on those aromatic compounds, such as ioxaglic acid, iodixanol, meglumine iotalamate, and diatriazole sodium, did not inhibit human UGT1A6 activity. These results suggest that halogens enhance the inhibitory effect of xanthene dyes. In this study, it was proved that xanthene dyes had an inhibitory effect on human UGT1A6 activity by the combination of xanthene structure and halogens on its. Part of this inhibition by xanthene dyes depends the reaction of 1 O2 originated on xanthene dyes by light irradiation, because the inhibition was prevented by 1 O2 quenchers, such as NaN3 and histidine, and in the dark.
18 citations
TL;DR: Aqueous solubilities of xanthene (C13H10O), anthrone (C14H 10O), xanthone (C 13H8O2), thioxanthone, 9,10-anthraquinone, and 9, 10-phenanthrenequinone were measured at temperatures from 313 K to the solute melting point and pressures close to 5 MPa by a dynamic method combined with gas chromatography/mass spectrometry as discussed by the authors.
Abstract: Aqueous solubilities of xanthene (C13H10O), anthrone (C14H10O), xanthone (C13H8O2), thioxanthone (C13H8OS), 9,10-anthraquinone (C14H8O2), and 9,10-phenanthrenequinone (C14H8O2) were measured at temperatures from 313 K to the solute melting point and pressures close to 5 MPa by a dynamic method combined with gas chromatography/mass spectrometry The experimental solubilities were used to estimate the activity coefficients of the solutes in the aqueous solutions at saturation Relative rates of increase of solute solubility (mole fraction) with temperature ranged from 0049 K−1 to 0056 K−1
18 citations
TL;DR: In this article, the synthesis of a new class of cationic dye is described, whose chromophoric system is formally related to that of the Cationic xanthene dyes in which one of the aminophenyl rings is replaced by a 2-aminothiazole ring.
18 citations
TL;DR: The polymer end-capped by nitrobenzene units, which act as fluorescence quenchers, exhibited the photo-excited energy transfer from the layered oligophenylenes to the terminal units.
Abstract: We report syntheses of phenylene-, biphenylene-, and terphenylene-layered polymers with a xanthene scaffold by the modified Suzuki-Miyaura coupling reaction Their optical properties were studied in detail The polymer end-capped by nitrobenzene units, which act as fluorescence quenchers, exhibited the photo-excited energy transfer from the layered oligophenylenes to the terminal units
18 citations