Cancer is still among the leading health issues today, considering cost, effectiveness, complexity of detection/treatment modalities and survival rates. One most important criteria for higher rates early sensitive diagnosis disease that can direct treatment effectively. Florescence imaging agents emerged as an alternative due to current state art their spatial temporal resolution, high sensitiv...

1,3-Dibromo-5,5-dimethylhydantoin (DBH), as a cheap and commercially available reagent, is efficiently able to catalyze the synthesis of polyhydroquinoline derivatives and 12-aryl-8,9,10,12-tetrahydro[a] xanthene-11-ones via one-pot multi-component reactions. This novel synthetic method has the advantages of low cost and availability of the catalyst, short reaction times, high to excellent yiel...

Thermal rearrangement of spirans (14) and (31) yields the xanthones (16,34) and diphenylrnethane (15, 32), respectively. The structure for xanthone (16), isolated from thermolysis, has been established by reduction to xanthene (20) followed by reoxidation to give xanthone (16). Alternatively, methylation of the diphenylmethane (15) followed by heating with selenium dioxide also yields xant...

Following previous studies on anthraquinone and acridine-based G-quadruplex ligands, here we present a study of similar aromatic cores, with the specific aim of increasing G-quadruplex binding and selectivity with respect to duplex DNA. Synthesized compounds include two and three-side chain xanthone and xanthene derivatives, as well as a dimeric "bridged" form. ESI and FRET measurements suggest...

The title compound, C(19)H(26)O(3), was synthesized directly from the condensation of 5,5-dimethyl-cyclo-hexane-1,3-dione with malononitrile catalysed by palladium chloride: there are two molecules in the asymmetric unit.

Photoactivatable “caged” fluorophores enable numerous advanced biological imaging experiments, including photoactivated localization microscopy (PALM) and related super-resolution imaging techniques. Of the extant fluorophore scaffolds, caged rhodamines and fluoresceins display properties that are exceptionally well suited for superresolution microscopy, exhibiting high contrast and photon yiel...

The syntheses of two functionalized xanthenes are described which after deprotonation represent ligands for dinuclear metal complexes. For the previously prepared [Xanthdim]H2 – which after deprotonation leads to a ligand with two adjacent β -diiminato binding sites – a significantly improved synthetic procedure is described involving the Pd catalyzed coupling of two diethyl malonate moieties t...