One-step synthesis of novel tricyclic isomeric azidonucleosides
摘要:
Several tricyclic azido-isonucleosides were formed in high yields by the treatment of pyrimidine isonucleosides with triphenylphosphine, tetrabromomethane, and sodium azide. The regioselective ring opening of these tricyclic azido-isonucleosides was also investigated. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis and Duplex Stabilization of Oligonucleotides Consisting of Isonucleosides
摘要:
Novel oligonucleotide analogues built from isonucleosides were synthesized by the phosphoramidite approach on an automated DNA synthesizer. The phosphoramidite building blocks were synthesized by phosphitylation of the corresponding protected isonucleosides. The oligonucleotide analogues C - G containing the isonucleoside 1-3 were studied with respect to their hybridization properties and enzymatic stability. The oligomers bearing an isonucleoside at the end of the strands all proved stable towards snake-venom phosphodiesterase, but only the oligomers D-G exhibit acceptable duplex stability when hybridized with complementary d(A(14)).