Synthesis of all four nucleoside-based β-amino acids as protected precursors for the synthesis of polyamide-DNA with alternating α-amino acid and nucleoside-β-amino acids
作者:Seema Bagmare、Manojkumar Varada、Anjan Banerjee、Vaijayanti A. Kumar
DOI:10.1016/j.tet.2012.11.028
日期:2013.1
A simple approach is described for the synthesis of all four orthogonally protected nucleoside-β-amino acids from commercially available starting materials. Synthesis of a model tetrameric DNA sequence in 5′–3’direction employing trityl strategy and glycine as α-aminoacid alternating with nucleoside-β amino acids is described.
α-<scp>l</scp>-<i>ribo</i>-Configured Locked Nucleic Acid (α-L-LNA): Synthesis and Properties
作者:Mads D. Sørensen、Lisbet Kværnø、Torsten Bryld、Anders E. Håkansson、Birgit Verbeure、Gilles Gaubert、Piet Herdewijn、Jesper Wengel
DOI:10.1021/ja0168763
日期:2002.3.1
The syntheses of monomeric nucleosides and 3‘-O-phosphoramidite building blocks en route to α-l-ribo-configured lockednucleicacids (α-L-LNA), composed entirely of α-L-LNA monomers (α-l-ribo configuration) or of a mixture of α-L-LNA and DNA monomers (β-d-ribo configuration), are described and the α-L-LNA oligomers are studied. Bicyclic 5-methylcytosin-1-yl and adenin-9-yl nucleoside derivatives have
2'-HYDROXYL-PROTECTED RIBONUCLEOSIDE DERIVATIVE AND MANUFACTURING METHOD OF SAME
申请人:Kaneka Corporation
公开号:EP2258709A1
公开(公告)日:2010-12-08
The present invention relates to a method for producing a 2'-hydroxy-protected nucleoside derivative by reacting a ribonucleoside with an acylating reagent in the presence of a metal complex consisting of a copper compound and an optically active ligand. By the method according to the present invention, a 2'-hydroxy-protected ribonucleoside derivative, which is an important intermediate for producing an oligonucleoside, can be easily produced with good regioselectivity from a nucleoside derivative of which 2',3'-hydroxy groups are not protected.
Oligonucleotide-folate conjugates are described wherein folates are conjugated to one or more sites on an oligonucleotide including the 2′-, 3′-, 5′-, nucleobase and internucleotide linkage sites. The folate can be attached via the &agr;- or &ggr;-carboxylate, optionally through a linking group. Methods for the regiospecific synthesis of the conjugates are diclosed. Also disclosed are nucleosidic and non-nucleosidic linkers conjugated to folic acid and related folates.
Methods for selective acylation of nucleosides and nucleotides are provided. The methods can provide monoacylated products and are useful for forming N-acylated nucleosides, nucleotides, and dimers and oligomers thereof.