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US5922867A Method and compositions for the synthesis of dioxolane nucleosides with .beta. configuration 失效
用β配置合成二氧戊环核苷的方法和组合物

Method and compositions for the synthesis of dioxolane nucleosides with
.beta. configuration
摘要:
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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