Solid-Phase Synthesis of <i>P</i>‑Boronated
Oligonucleotides by the <i>H</i>‑Boranophosphonate
Method
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Abstract
Recently, <i>P</i>-boronated
oligonucleotides have been
attracting much attention as potential therapeutic oligonucleotides.
In this study, we developed <i>H</i>-boranophosphonate oligonucleotide
bearing a borano group and hydrogen atom on the internucleotidic phosphorus
and demonstrated that this novel <i>P</i>-boronated oligonucleotide
is a versatile precursor to various <i>P</i>-boronated oligonucleotides
such as boranophosphate, boranophosphorothioate, and boranophosphoramidate.
The method was also applicable to the synthesis of a locked nucleic
acid-modified boranophosphate oligonucleotide, which exhibited a dramatically
enhanced affinity to complementary oligonucleotides