NOVEL PROCESS FOR THE PREPARATION OF (2R)-2-DEOXY-2-FLUORO-2-METHYL-D-ERYTHRO-PENTONO-GAMMA-LACTONE AND (2S)-2-DEOXY-2-FLUORO-2-METHYL-D-ERYTHRO-PENTONO-GAMMA-LACTONE
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United States of America Patent
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Issued Date -
Jul 24, 2008
app pub date -
Jan 15, 2008
filing date -
Jan 23, 2007
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Abstract
The present invention provides novel methods for preparing compounds (2R)-2-deoxy-2-fluoro-2-methyl-D-erythro-pentono-.gamma.-lactone (11) and (2S)-2-deoxy-2-fluoro-2-methyl-D-erythro-pentono-.gamma.-lactone (12), which are intermediates for preparing a key intermediate 3,5-di-O-acyl-2-fluoro-2-C-methyl-D-ribono-.gamma.-lactone (B), for the preparation of 1-(2-deoxy-2-fluoro-2-C-methyl-.beta.-D-ribofuranosyl)cytosine (A), which is a potent and selective anti-hepatitis C virus agent.
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