A novel hybrid consisting of quinazoline and adenine moieties has been synthesized as a precursor of a potential biologically active target compound. The structure of 9-(4-methoxyquinazolin-2-yl)-9H-purin-6-amine (2) was characterized and confirmed using the following spectroscopic methods: LC-UV-MS, 1H-NMR, 13C-NMR and HSQC-NMR.

Dual emission light-emitting dendrimers composed of phosphorescent fac-tris[2-phenylpyridyl]iridium(III) [Ir(ppy)3] cores and thermally activated delayed fluorescence-based (TADF-based) dendrons have been prepared. The TADF-based are designed to green or blue emission. show solvatochromism, with the switching between phosphorescence TADF depending on medium in which measurement is undertaken. T...

Reactions of 5-(9H-carbazol-9-yl)-isophthalate and metal salts provide laminar metal organic frameworks (MOFs) wherein interlayer interactions of the pendant carbazoles engender extended aromatic stacks or non-stacked structures with enhanced solid-state emission. These studies emphasize that MOFs serve as versatile supramolecular platforms to direct the aggregation and electroptical behaviours...

Abbreviations used: Acm, acetamidomethyl; Boc, tert-butoxycarbonyl; Bzl, benzyl; Bzl(4-Me), 4-methylbenzyl; DPDS, di(2-pyridyl)disulfide; DMSO, dimethylsulfoxide; Fmoc, 9-fluorenylmethoxycarbonyl; Mob, 4-methoxybenzyl; Npys, 3-nitro-2-pyridylsulfanyl; Pys, 2-pyridylsulfanyl; StBu, tert-butylsulfanyl; sec, selenocysteine; tBu, tert-butyl; TFA, trifluoroacetic acid; TfOH, trifluoromethanesulfonic...

Polyfluorene with p-carborane in the backbone was synthesized from the new monomer 1,12-bis(7-bromo-9,9-dihexyl-9H-fluoren-2-yl)-closo-1,12-dicarbodecaborane to give a high MW, soluble, blue-emitting material characterized by NMR, UV-vis, and fluorescence spectroscopy.

Two new compounds, 6'-O-caffeoyl-p-hydroxyacetophenone-4-O-beta-D-glucopyranoside(1) and 6-amino-9-[1-(3,4-dihydroxyphenyl)ethyl]-9H-purine (2) were isolated from the aerial parts of Artemisia capillaris Thunb. The structures were established on the basis of spectral data.

Activation of the A2A adenosine receptor (A(2A)R) during reperfusion of various tissues has been found to markedly reduce ischemia-reperfusion injury. In this study, we used bone marrow transplantation (BMT) to create chimeric mice that either selectively lack or selectively express the A(2A)R on bone marrow-derived cells. Bolus i.p. injection of the selective A2A agonist, 4-[3-[6-amino-9-(5-cy...

[structure: see text] A new fluorophore, tri(9,9-diethyl-9H-fluorenyl)amine, was synthesized by the Buchwald-Hartwig reaction of 2-aminofluorene, and based on this molecule three more fluorophores were prepared that exhibit a very large intrinsic three-photon absorption in the near-IR region, which scales as a third power of the bridge length.

The ethyl acetate extract of the roots of Moutabea guianensis gave 1,6-dihydroxy-4,7,8-trimethoxy-9H-xanthen-9-one (1), a new xanthone. The isolation was accomplished by column chromatography on silica gel and the structural elucidation of this compound was established by spectroscopic analyses including 1D and 2D NMR and HRESIMS.