4-Thiofuranoid glycals: versatile synthons for stereoselective synthesis of 4'-thionucleosides |
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Authors: | Haraguchi Kazuhiro Takahashi Haruhiko Tanaka Hiromichi |
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Institution: | School of Pharmaceutical Sciences, Showa University, Shinagawa-ku, Tokyo, Japan. harakazu@pharm.showa-u.ac.jp |
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Abstract: | Beta-anomers of 4'-thionucleosides have been synthesized stereoselectively, through PhSeCl- or N-iodosuccimide (NIS)-initiated electrophilic glycosidation to 3,5-O-(di-t-butylsilylene)-4-thiofuranoid glycal (1). This synthetic method has been applied to the synthesis of those analogues branched at the anomeric position using 1-C-carbon-substituted 3,5-O-(tetraisopropyldisiloxane-1,3-diyl)-4-thiofuranoid glycals (11-14) prepared based on lithiation of 10. |
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