Synthesis of the first ferrocene-labeled dideoxynucleotide and its use for 3'-redox end-labeling of 5'-modified single-stranded oligonucleotides.
BIOCONJUGATE CHEMISTRY(2001)
Abstract
The target ferrocene-labeled dideoxynucleotide compound 5-[N-(beta -ferracenyl-propanoyl)3-amino-propynl-yl] -2',3'-dideoxyuridine 5'-triphosphate, Fc-ddUTP, was synthesized and tested with terminal deoxynucleotidyl transferase for enzymatic S'-redox-active end-labeling of 5'-phosphorylated single-stranded oligodeoxynucleotides. Starting from readily available 5-iodouridine and 3-ferrocenylpropanoic acid, the synthetic strategy elaborated here follows a mild multistep route. Each step involves reliable methods, and all ferrocene intermediates can be easily purified. Enzymatic 3'-ferrocene end-labeling of 5'-phosphorylated oligonucleotides is remarkably efficient, and 3'-ferrocene-labeled oligonucleotides can thus be prepared in sufficient amounts for further use in surface modifications.
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Key words
Ferrocene
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