[EN] 2',4'-BRIDGED NUCLEOSIDES FOR HCV INFECTION<br/>[FR] NUCLÉOSIDES 2', 4'-PONTÉS POUR L'INFECTION PAR LE VHC
申请人:IDENIX PHARMACEUTICALS INC
公开号:WO2014066239A1
公开(公告)日:2014-05-01
Provided herein are compounds, compositions and methods for the treatment of Flaviviridae infections, including HCV infections. In certain embodiments, compounds and compositions of nucleoside derivatives are disclosed, which can be administered either alone or in combination with other anti-viral agents. In certain embodiments, the compounds are 2',4'-bridged nucleosides which display remarkable efficacy and bioavailability for the treatment of, for example, HCV infection in a human. In certain embodiments, the 2',4'-bridged nucleosides are of Formula 3001:(I) (3001); or a pharmaceutically acceptable salt, solvate, stereoisomeric form, tautomeric form or polymorphic form thereof, where PD, B, W, X, RA, RB, RC and RD are as described herein.
Synthesis and Photophysical Studies on N1-(2′-O,4′-C-Methyleneribofurano-nucleoside-3′-yl)-C4-(coumarin-7-oxymethyl)-1,2,3-triazoles
作者:Smriti Srivastava、Vipin K. Maikhuri、Rajesh Kumar、Kapil Bohra、Harbansh Singla、Jyotirmoy Maity、Ashok K. Prasad
DOI:10.1016/j.carres.2018.09.007
日期:2018.12
A series of eight N1-(2'-O,4'-C-methylene-β-D-ribofuranonucleoside-3'-yl)-C4-(coumarin-7-oxymethyl)-1,2,3-triazoles have been synthesized by Cu(I)-catalyzed azide-alkyne cycloaddition reaction of 3'-azido-3'-deoxy-2'-O,4'-C-methyleneuridine and 3'-azido-3'-deoxy-2'-O,4'-C-methylene-5-methyluridine with 7-propargyloxy coumarins in 82-88% yields. The synthesized coumarintriazolyl-bicyclonucleoside conjugates
Chemo-enzymatic synthesis of bicyclic 3′-azido- and 3′-amino-nucleosides
作者:Manish Kumar、Vivek K. Sharma、Carl E. Olsen、Ashok K. Prasad
DOI:10.1039/c4ra06805j
日期:——
Conformationally locked 3â²-azido-3â²-deoxythymidine analogues of T, U, A and C containing a 2â²-O,4â²-C-methylene linked bicyclic furanose moiety has been efficiently synthesized following a greener chemo-enzymatic convergent route. Thus, one of the two diastereotopic hydroxyl groups of 3-azido-3-deoxy-4-C-hydroxymethyl-1,2-O-isopropylidene-α-D-ribofuranose has been regioselectively acetylated using Novozyme®-435 in quantitative yield. The selective enzymatic acetylation can be carried out with the same efficiency using Novozyme®-435 for 10 cycles of reaction. The monoacetylated sugar derivative was converted to bicyclic 3â²-azidonucleosides in four steps in overall yields of 60 to 68%. It has been demonstrated that 3â²-azido-3â²-deoxy-2â²-O,4â²-C-methylenethymidine can easily be converted into 3â²-amino-3â²-deoxy-2â²-O,4â²-C-methylenethymidine in 95% yield, which is an important monomer for the synthesis of therapeutically useful sugar-modified oligonucleotides.