[EN] N- [ (2 ' R) -2 ' -DEOXY-2 ' -FLUORO-2 ' -METHYL-P-PHENYL-5 ' -URIDYLYL] -L-ALANINE 1-METHYLETHYL ESTER AND PROCESS FOR ITS PRODUCTION<br/>[FR] ESTER DE N-[(2 ' R) -2' -DÉSOXY-2' -FLUORO-2' -MÉTHYL-P-PHÉNYL-5' -URIDYLYL]-L-ALANINE 1-MÉTHYLÉTHYLE ET SON PROCÉDÉ DE PRODUCTION
申请人:PHARMASSET INC
公开号:WO2010135569A1
公开(公告)日:2010-11-25
Disclosed herein are nucleoside phosphoramidates of formula 4 and their use as agents for treating viral diseases. These compounds are inhibitors of RNA-dependent 5 RNA viral replication and are useful as inhibitors of HCV NS5B polymerase, as inhibitors of HCV replication and for treatment of hepatitis C infection in mammals. Disclosed is also a process for preparing compound represented by formula 4: (Formula 4) wherein P* represents a chiral phosphorus atom, which comprises: a) reacting an isopropyl-alanate, (Formula A), a di-X'-phenylphosphate, (Formula B), 2'-deoxy-2f-fluoro-2'-C-methyluridine, (Formula 3), and a base to obtain a first mixture comprising 4; wherein X is a conjugate base of an acid, n is 0 or 1, and X' is a halogen, b) reacting the first mixture with a protecting compound to obtain a second mixture comprising 4; and c) optionally subjecting the second mixture to crystallization, chromatography or extraction in order to obtain 4.
Rate-determining carbonyl hydration in the intramolecular hydrolysis of phenacyl phosphonate esters: isotopic probes and activation parameters
作者:Ildiko M. Kovach、Qinjian Zhao、Matthew Keane、Rachel Reyes
DOI:10.1021/ja00076a001
日期:1993.11
with alkoxy substituents not containing a β-carbonyl group. This is consistent with an intramolecular displacement of 4-nitrophenol by the anion of the carbonyl hydrate. 18 O incorporation into the hydrolysis product of the 4-CH 3 derivative from H 2 18 O in alkaline solution is 5 indicates a rapid protonic equilibrium between the carbonyl hydrate and the medium but slower equilibration of the carbonyl
4-硝基苯基 4-取代苯甲酰基甲基膦酸酯(CH 3 、H、CH 2 O、NO 2 和 Cl)在水性缓冲液中的分解速度比具有不含 β-羰基的烷氧基取代基的类似物快 1-4 个数量级。这与羰基水合物的阴离子对 4-硝基苯酚的分子内置换是一致的。18 O 结合到碱性溶液中 H 2 18 O 的 4-CH 3 衍生物的水解产物中是 5 表明羰基水合物和介质之间的快速质子平衡,但羰基 O 与介质的平衡比环化慢
<i>P</i>-CHIRAL OLIGONUCLEOTIDES. 2D ROESY NMR ASSIGNMENT OF ABSOLUTE CONFIGURATION AT PHOSPHORUS AND CONFORMATIONAL ANALYSIS OF 5′-<i>O</i>-MONOMETHOXYTRITYL-(2′-<i>O</i>-DEOXYRIBONUCLEOSIDE) 3′-<i>O</i>-[<i>O</i>-(4-NITROPHENYL)]METHANEPHOSPHONATES
作者:Stefan Jankowski、Agnieszka B. Olejniczak、Zbigniew J. Lesnikowski
DOI:10.1081/ncn-120003181
日期:2002.4.15
methodology for the assignment of the absoluteconfiguration at the phosphorus atom in diastereomerically pure Rp and Sp 5'-O-monomethoxytrityl-2'-O-deoxynucleoside 3'-O-(O-4-nitrophenyl) methanephosphonate (3) was established. The method utilizes 2D ROESY NMR and can be used for the stereochemical analysis of other P-chiral mononucleotides. Configurational analysis shows that the major conformation of the sugar