| 摘要 |
A process for preparing 2',3'-didehydro-2',3'-dideoxynucleosides and 2',3'-dideoxynucleosides is described, which comprises the reductive elimination reaction of a compound of formula in which X, Y, P' is H or a protecting group and B is a natural or modified, optionally substituted purine or pyrimidine base or a five- or six-membered monocyclic or eleven- or twelve-membered bicyclic, optionally substituted heterocyclic system containing at least one nitrogen atom, by reaction with zinc metal and a suitable activating agent, characterized in that the divalent zinc is removed by precipitation, from an organic phase, of the corresponding zinc sulfide, by adding a solution of a mineral sulfide to the organic phase.
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