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Novel water-soluble (99m)Tc(I)/Re(I)-porphyrin conjugates as potential multimodal agents for molecular imaging.

Journal of inorganic biochemistry (2013-03-12)
Cinzia Spagnul, Roger Alberto, Gilles Gasser, Stefano Ferrari, Vanessa Pierroz, Alberta Bergamo, Teresa Gianferrara, Enzo Alessio
RESUMO

The synthesis and characterization of two novel water soluble porphyrins with three meso pyridyl rings and one peripheral chelator - either a diethylenetriamine unit (4) or a bipyridyl fragment (8) - for binding to the {(99m)Tc(CO)3}(+) moiety is reported. In 8, despite the presence of a flexible and hydrophilic PEG-like linker that connects the bpy unit to the macrocycle, good water solubility was only obtained by methylation of the pyridyl N atoms that provided three extra positive charges. Furthermore, the water-soluble conjugates of 4 and 8 with either one fac-{Re(CO)3}(+) (9 and 10, respectively) or one fac-{(99m)Tc(CO)3}(+) fragment (9a and 10a, respectively) are described.

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Sigma-Aldrich
Rhenium, powder, 99.995% trace metals basis
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