Synthesis of Modified Nucleotide Building Blocks Containing Electrophilic Groups in the 2′-Position
摘要:
Chemical syntheses of 2'-O-(allyloxycarbonyl)methyladenosine, 2'-O(methoxycarbonyl)methyladenosine and 2'-O-(2,3-dibenzoyloxy)propyluridine 3'-2-cyanoethyl-N,N-diisopropyl phosphoramidite building blocks are described. These monomers were used successfully to incorporate carboxylic acid, 1,2-diol and aldehyde functionalities into synthetic oligonucleotides.
作者:T. S. Zatsepin、A. V. Kachalova、E. A. Romanova、D. A. Stetsenko、M. J. Gait、T. S. Oretskaya
DOI:10.1023/a:1009579002330
日期:——
A newuridinederivative, 2'-O-(2,3-dihydroxypropyl)uridine, and its 3'-phosphoramidite were obtained for direct introduction into oligonucleotides during automated chemicalsynthesis. Oligonucleotides 10 to 15 nt long harboring 2'-O-(2,3-dihydroxypropyl)uridine residues were synthesized; periodate oxidation of these oligomers gave oligonucleotides containing 2'-O-(2-oxoethyl)uridine residues. The
Dinucleotides containing two allyl groups by combinations of allyl phosphotriesters, 5-allyl-, 2′-O-allyl- and 2′-arabino-O-allyl uridine derivatives as substrates for ring-closing metathesis
作者:Philip Børsting、Morten Freitag、Poul Nielsen
DOI:10.1016/j.tet.2004.09.023
日期:2004.11
Five different dinucleotides, each containing two allyl groups in various positions, were prepared and studied as substrates for ring-closing metathesis reactions. These dinucleotides were designed from appropriate nucleoside building blocks combining four different positions for the allyl group; the allyl phosphotriester linkage, 5-allyl-2' -deoxyuridine, and ribo- as well as arabino-configured 2'-O-allyluridine. Thus, convenient procedures for these building blocks were developed. From the dinucleotides, two new cyclic nucleotide structures were obtained; one connecting two adjacent nucleobase moieties and the other forming an unsaturated four-carbon linkage between the phosphate moiety and the adjacent pyrimidine nucleobase. The latter cyclic dinucleotide was also prepared with a saturated four-carbon linkage using a tandem ring-closing metathesis-hydrogenation procedure. This compound was found to be significantly more stable towards a nucleophilic ring-opening than its unsaturated counterpart. (C) 2004 Elsevier Ltd. All rights reserved.