Novel isomeric dideoxynucleosides as potential antiviral agents
摘要:
Novel isomeric dideoxynucleosides with S,S absolute stereochemistry and involving the transposition of the base moiety from the normal 1'- to the 2'-position have been regiospecifically and stereospecifically synthesized. The synthetic approaches involved either direct coupling with inversion at the 2-position of a preformed dideoxygenated sugar using the base moiety as nucleophile (for purine isodideoxynucleosides) or construction of the base moiety onto a stereochemically defined amino sugar precursor (pyrimidine isodideoxynucleosides). These compounds possess extremely high stability with respect to ''glycosidic'' bond cleavage and enzymatic deamination. Antiviral data suggest that the most active compound was levorotatory S,S-isodideoxyadenosine.
Novel isomeric dideoxynucleosides as potential antiviral agents
摘要:
Novel isomeric dideoxynucleosides with S,S absolute stereochemistry and involving the transposition of the base moiety from the normal 1'- to the 2'-position have been regiospecifically and stereospecifically synthesized. The synthetic approaches involved either direct coupling with inversion at the 2-position of a preformed dideoxygenated sugar using the base moiety as nucleophile (for purine isodideoxynucleosides) or construction of the base moiety onto a stereochemically defined amino sugar precursor (pyrimidine isodideoxynucleosides). These compounds possess extremely high stability with respect to ''glycosidic'' bond cleavage and enzymatic deamination. Antiviral data suggest that the most active compound was levorotatory S,S-isodideoxyadenosine.
The Barton–McCombie deoxygenation is one of the most important transformations in the toolbox of organic chemists which has been the subject of a number of methodological developments. In this study, we report a photocatalyzed redox deoxygenation of secondary and tertiary alcohols from thiocarbamate precursors under visible light activation. The iridium complex Ir(ppy)3 proved to be the most efficient
The invention provides unsaturated phosphonates of Formula I or a tautomer or pharmaceutically accepatble salt thereof, as described herein, as well as pharmaceutical compositions comprising the compounds, and therapeutic methods comprising administering the compounds. The compounds have anti-viral properties and are useful for treating viral infections (e.g. HCV) in animals (e.g. humans).
Deoxygenation of 5-O-benzoyl-1,2-isopropylidene-3-O-imidazolylthiocarbonyl-α-d-xylofuranose using dimethyl phosphite: an efficient alternate method towards a 3′-deoxynucleoside glycosyl donor
An efficient radical deoxygenation reaction of thiocarbonylimidazolyl activated glycoside analogue using dimethyl phosphite as hydrogen source and radical chain carrier was performed as a key step in a multi step synthesis towards a common 3-deoxy glycosyl donor for 3'-deoxynucleosides. This method has safety and cost advantages compared to the generally used radical reduction reagents. (c) 2008 Elsevier Ltd. All rights reserved.
US8324179B2
申请人:——
公开号:US8324179B2
公开(公告)日:2012-12-04
[EN] NUCLEOSIDE ANALOGS FOR ANTIVIRAL TREATMENT<br/>[FR] ANALOGUES NUCLÉOSIDIQUES POUR TRAITEMENT ANTIVIRAL
申请人:GILEAD SCIENCES INC
公开号:WO2008100447A2
公开(公告)日:2008-08-21
[EN] The invention provides unsaturated phosphonates of Formula I or a tautomer or pharmaceutically accepatble salt thereof, as described herein, as well as pharmaceutical compositions comprising the compounds, and therapeutic methods comprising administering the compounds. The compounds have anti-viral properties and are useful for treating viral infections (e.g. HCV) in animals (e.g. humans). [FR] La présente invention concerne des phosphonates insaturés de formule (I) ou un tautomère ou un sel pharmaceutiquement acceptable de ceux-ci, ainsi que des compositions pharmaceutiques comportant les composés, et des procédés thérapeutiques comprenant l'administration des composés. Les composés présente des propriétés antivirales et sont utiles pour traiter des infections (par exemple, le VHC) chez des animaux (par exemple, des humains).