C-ヌクレオシドおよびその関連化合物の合成
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Formycin, showdomycin, pyrazomycin, oxazinomycin are known as C-nucleoside antibiotics. In this review, synthetic methods of C-nucleosides are cited. Especially, synthetic studies on C-nucleoside analogs are summarized.<BR>Aldoses are reacted with carbonyl reagents or diamines and further cyclization affords C-nucleoside analogs. Ethynyl derivatives of sugar are cyclized with cycloaddition reaction to obtain heterocycles. On one hand, Schiff bases or diazo- compounds of sugar also cyclized with acetylenic compounds. Ketoisothiocyanate of sugar derivative is reacted with nucleophilic reagents to give C-nucleoside analogs. Sugar lactones react with lithiated compounds to afford 1-hydroxy C-nucleo-side analogs under stereoselective control.
- 社団法人 有機合成化学協会の論文
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