Abstract
The synthesis of oligonucleotide (ON) analogs, which can be used as antisense molecules, has recently gained much attention. Here, we report the synthesis and properties of an ON analog containing acyclic thymidine and cytidine analogs with a 4-pentyl-1,2-diol instead of the d-ribofuranose moiety. The incorporation of these analogs into the ON improved its nuclease resistance to 3′-exonucleases. Furthermore, it was found that the incorporation of the acyclic thymidine analog into a DNA/RNA duplex accelerates the RNA cleavage of a DNA/RNA duplex by Escherichia coli RNase H.
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