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The imidazo[1,2-a]pyridinium heterocyclic system was used to prepare styryl dyes. Improved synthetic methods were proposed for the parent imidazo[1,2-a]pyridines and their corresponding quaternary salts. The standard method for preparing styrylcyanines was modified for the synthesis of the target imidazo[1,2-a]pyridinium dyes. Spectral-luminescent properties of the obtained dyes in free state and...
Fifteen novel mono-, di- and tricationic monomeric monomethine cyanine dyes, bearing mercapto and thioacetyl substituents, useful for nucleic acid detection are described. All derivatives absorb in the region 417–508nm and have molar absorptivities of 61 000–101 300lmol −1 cm −1 . The products were characterized by 1 H NMR, HPLC–MS and elemental analysis.
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