A new direct glycosylation of pyrimidine, pyrazole, imidazole and purine heterocycles via their N-tetrahydropyranyl (THP) derivatives
作者:Stefano Manfredini、Pier Giovanni Baraldi、Rita Bazzanini、Mario Guarneri、Daniele Simoni
DOI:10.1039/c39940000583
日期:——
Pyrimidine, pyrazole, imidazole and purine N-tetrahydropyranyl (THP) derivatives have been converted in one-pot and in a regio- and stereo-selective manner into the corresponding β-D-2′,3′,5′-tri-O-benzoyl ribofuranosyl nucleoside derivatives on treatment with 1-β-acetyl-2′,3′,5′-tri-O-benzoyl-ribofuranose, hexamethyldisilazane (HMDS), trimethylsilyl chloride (TMSCI), and trimethylsilyl triflate (TMST).
嘧啶、哌唑、咪唑和嘌呤N-四氢吡喃基(THP)衍生物在一锅反应中以区域和立体选择性方式转化为相应的β-D-2′,3′,5′-三-O-苯甲酰核糖苷衍生物,反应中使用了1-β-乙酰-2′,3′,5′-三-O-苯甲酰核糖、六甲基二硅氮烷(HMDS)、三甲基氯硅烷(TMSCI)和三甲基硅烷三氟甲磺酸盐(TMST)。