BN-Phenanthrene- and BN-Pyrene-Based Fluorescent Uridine Analogues

Two unprecedented fluorescent nucleosides that feature
BN-doped
polycyclic aromatic hydrocarbons are presented. One of them, having
a BN-modified phenanthrene moiety incorporated, shows blue fluorescence
but suffers from poor stability under aqueous conditions. The other
nucleoside comprises an internally BN-doped pyrene as the chromophore.
It shows green fluorescence in various solvents and is stable under
aqueous and alkaline conditions.