A practical synthesis of 2'-deoxy-2'-fluoro-5-methyl-beta-L-arabinofuranosyl uracil (14, L-FMAU) was developed from L-arabinose. L-Arabinose was converted to L-ribose 5, which was used for the synthesis of bromosugar 12 via 2,3,5-O-tribenzoyl-1-O-acetyl-beta-L-ribofuranose 8, which was subjected to condensation with silylated thymine and the resulting protected L-FMAU 13 was deprotected to afford L-FMAU in 14 steps in 8 % overall yield.
Process for the preparation of 2'-halo-beta-L-arabinofuranosyl nucleosides
申请人:——
公开号:US20030060622A1
公开(公告)日:2003-03-27
The present invention is directed to the process for the preparation of 2′-deoxy-2′-halo-&bgr;-L-arabinofuranosyl nucleosides, and in particular, 2′-deoxy-2′-fluoro-&bgr;-L-arabinofuranosyl thymine (L-FMAU), from L-arabinose, which is commercially available and less expensive than L-ribose or L-xylose, in ten steps. All of the reagents and starting materials are inexpensive and no special equipment is required to carry out the reactions.
[EN] L-NUCLEOSIDES FOR THE TREATMENT OF HEPATITIS B-VIRUS AND EPSTEIN-BAR VIRUS<br/>[FR] NUCLEOSIDES - L POUR LE TRAITEMENT DES VIRUS DE L'HEPATITE B ET EPSTEIN-BAR
申请人:UNIVERSITY OF GEORGIA RESEARCH FOUNDATION, INC.
公开号:WO1995020595A1
公开(公告)日:1995-08-03
(EN) A method for the treatment of a host, and in particular, a human, infected with HBV or EBV is provided that includes administering an HBV- or EBV- treatment amount of an L-nucleoside of formula(I) wherein R is a purine or pyrimidine base. In one preferred embodiment, the active compound is 2'-fluoro-5-methyl-$g(b)-L-arabinofuranosyluridine (also referred to as L-FMAU). This compound is a potent antiviral agent against HBV and EBV and exhibits low cytotoxicity. Other specific examples of active compounds include N1-(2'-deoxy-2'-fluoro-$g(b)-L-arabinofuranosyl)-5-ethyluracil, N1-(2'-deoxy-2'-fluoro-$g(b)-L-arabinofuranosyl)-5-iodocytosine), and N1-(2'-deoxy-2'-fluoro-$g(b)-L-arabinofuranosyl)-5-iodouracil.(FR) Méthode de traitement d'un hôte (humain en particulier) infecté par le VHB ou le VEB et consistant à lui administrer une dose adéquate d'un nucléoside-L de formule (I) dans laquelle R est une base purique ou pyrimidique. Dans un mode préféré de réalisation, le principe actif est une 2'-fluoro-méthyl-$g(b)-L-arabinofuranosyluridine (L-FMAU), composé antiviral puissant contre le VHB et le VEB, présentant une faible cytotoxicité. D'autres exemples spécifiques de composés actifs comprennent le N1-(2'-désoxy-2'-fluoro-$g(b)-L-arabinofuranosyl)-5-éthyluracyl; le N1-(2'-désoxy-2'-fluoro-$g(b)-L-arabinofuranosyl)-5-iodocytosine; et le N1-(2'-déoxy-2'-fluoro-$g(b)-L-arabinofuranosyl)-5-iodouracil.
A compound, and a pharmaceutical composition comprising an effective mount to treat HBV or EBV of a compound, of the formula: ##STR1## wherein R is selected from the group consisting of 5-methyluracil, adenine and cytosine, and R' is hydrogen, acyl, or alkyl or a monophosphate, diphosphate or triphosphate ester, or its pharmaceutically acceptable salt.