Method and compositions for the synthesis of dioxolane nucleosides with .beta. configuration
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United States of America Patent
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Jul 13, 1999
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app pub date -
Jun 26, 1997
filing date -
Dec 14, 1995
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Abstract
The present invention relates to methods and compositions for preparing biologically important nucleoside analogues containing 1,3-dioxolane sugar rings. In particular, this invention relates to the stereoselective synthesis of the beta (cis) isomer by glycosylating the base with an intermediate of formula (II) below a temperature of about -10.degree. C. ##STR1## wherein R.sub.1 and L are defined herein.
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