34218-83-2Relevant articles and documents
An efficient and facile methodology for bromination of pyrimidine and purine nucleosides with sodium monobromoisocyanurate (SMBI)
Maity, Jyotirmoy,Stromberg, Roger
, p. 12740 - 12750 (2013/11/06)
An efficient and facile strategy has been developed for bromination of nucleosides using sodium monobromoisocyanurate (SMBI). Our methodology demonstrates bromination at the C-5 position of pyrimidine nucleosides and the C-8 position of purine nucleosides. Unprotected and also several protected nucleosides were brominated in moderate to high yields following this procedure.
Synthesis and characterization of RNA containing a rigid and nonperturbing cytidine-derived spin label
Hoebartner, Claudia,Sicoli, Giuseppe,Wachowius, Falk,Gophane, Dnyaneshwar B.,Sigurdsson, Snorri Th.
, p. 7749 - 7754 (2012/11/07)
The nitroxide-containing nucleoside Cm is reported as the first rigid spin label for paramagnetic modification of RNA by solid-phase synthesis. The spin label is well accommodated in several RNA secondary structures as judged by its minor effect on the thermodynamic stability of hairpin and duplex RNA. Electron paramagnetic resonance (EPR) spectroscopic characterization of mono-, bi-, and trimolecular RNA structures shows that Cm will be applicable for advanced EPR studies to elucidate structural and dynamic aspects of folded RNA.
Tritium labeling of full-length small interfering RNAs
Christensen, Jesper,Natt, Francois,Hunziker, Juerg,Krauser, Joel,Andres, Hendrik,Swart, Piet
experimental part, p. 189 - 196 (2012/09/22)
A simple procedure is described for full-length single internal [ 3H]-radiolabeling of oligonucleotides. Previous labeling strategies have been applied to large molecular weight compounds such as proteins and oligonucleotides, for example, iodination and 111In labeling via covalently bounded chelators. However, a procedure has not yet been reported for single internal radiolabeling of oligonucleotides that preserves the molecular structure (3H replacing a 1H). In following our strategy, the radiolabel can be strategically placed within a stable and predetermined internal position of the siRNA. This placement was accomplished by placing a 5-bromouridine or 5-bromo-2'-O-methyluridine phosphoramidite building block into the middle of the antisense strand using standard phosphoramidite chemistry. The deprotected full-length antisense strand was tritium labeled by bromine/tritium exchange, catalyzed by palladium on charcoal in the predetermined 5-position of either uridine or 2'-O-methyluridine. Internal placement of the building block within the oligonucleotide sequence and label placement at 5-position decreases the likelihood of the label to be readily cleaved from the oligonucleotide in vivo, and loss of the label by spontaneous tritium/hydrogen exchange. The tritiated single-stranded and double-stranded RNAs were also shown to be radio and chemically stable for at least 6 months at -80 °C. This allows more than sufficient time to conduct pharmaceutical formulation and pharmacokinetic studies. Copyright