Abstract
The syntheses of 2'-O-(pyren-1-ylmethyl)uridine phosphoramidite, 2'-O-(pyren-1-ylmethyl)adenosine phosphoramidite, and multiple pyrene-attached oligo-RNAs are described in this unit. The 2'-O-(pyren-1-ylmethyl)nucleosides are converted into the corresponding 2'-O-(pyren-1-ylmethyl)nucleoside 3'-phosphoramidites, which can be incorporated into the specific position of oligo-RNAs by solid-phase oligonucleotide synthesis. The multiple pyrene-attached oligo-RNA forms an A-form duplex with a complementary multiple pyrene-attached oligo-RNA; the pyrenes are associated with π-stacking along the outside of the duplex.
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