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The susceptibility of highly fluorescent luminarine nucleosides to acid promoted anomerization reactions has been studied in order to select a derivative with suitable properties for chemical synthesis of luminarine-labeled oligo(deoxy)ribonucleotides. Both O-acetylated derivatives Ia-c and parent luminarosine IIa, as well as 2'-O-meth-ylluminarosine IIb, and 2'-deoxyluminarosine IIc undergo anomerization...
Chemical synthesis of 2'-0-[13C methyl-rCGCGCG and 5-methyl-rCGCGCG using support-aided phosphoramidite method is presented. 2'-0-Methyl guanosine derivative was separated from its 3'-0-methyl counterpart using transient 5',3'-0-silylation with l,3-dichloro-l,l,3,3-tetraisopropyldisiloxane (Markiewicz reagent). The hexamers were obtained in a purity suitable for NMR studies.
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