作者:Natalya Ramzaeva、Helmut Rosemeyer、Peter Leonard、Klaus Mühlegger、Frank Bergmann、Herbert von der Eltz、Frank Seela
DOI:10.1002/1522-2675(20000607)83:6<1108::aid-hlca1108>3.0.co;2-9
日期:2000.6.7
The 2'-deoxypseudouridine (5) was functionalized at N(1) with methyl acrylate by Michael addition. The resulting methyl 2'-deoxypseudouridine-1-propanoate (6) was converted to the phosphoramidite 8 and to the amino-functionalized derivative 9, which was transformed into the fluorescein-labeled phosphoramidites 14 and 16. Fluorescent oligonucleotides were synthesized either from these building blocks or by post-synthetic modification of oligomers containing 2'-deoxypseudouridine subunits. The stability of oligonucleotide duplexes was determined from the melting profiles, measured by UV- or VIS-light absorbance, as well as from the fluorescence emission spectra. While small spacer residues did not affect the thermal stability of the 2'-deoxypseudouridine-containing duplexes, large dye residues led to destabilization.