Abstract
The syntheses of four selenonucleosides, namely 4'-beta-selenoadenosine, -cytidine, -thymidine, and -uridine are described. Commercially available D-ribonolactone was converted to the key intermediate 1,4-anhydro-4-seleno-D-ribitol in seven steps in overall excellent yield. Oxidation of the seleno-d-ribitol with MCPBA gave a single diastereomeric selenoxide in excellent yield, which upon Pummerer reaction in the presence of silylated purine or pyrimidine bases gave stereoselectively the corresponding 4'-beta-selenonucleosides. The stereochemistry at the anomeric center was determined by means of 1D-NOE experiments.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Adenosine / analogs & derivatives*
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Adenosine / chemical synthesis
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Cytidine / analogs & derivatives
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Cytidine / chemical synthesis
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Glycosylation
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Nucleosides / chemical synthesis*
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Organoselenium Compounds / chemical synthesis*
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Selenium / chemistry*
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Stereoisomerism
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Thymidine / analogs & derivatives
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Thymidine / chemical synthesis
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Uridine / analogs & derivatives
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Uridine / chemical synthesis
Substances
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4'-selenoadenosine
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4'-selenocytidine
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4'-selenothymidine
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4'-selenouridine
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Nucleosides
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Organoselenium Compounds
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Cytidine
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Selenium
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Adenosine
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Thymidine
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Uridine