6-(Phenethylamino)-9H-purine-2-carbonitrile 、
(2R,3R,4R,5S)-5-(acetyloxy)-4-(benzoyloxy)-2-(methoxymethyl)tetrahydro-3-furanyl benzoate 、
(2R,3R,4R,5R)-5-(acetyloxy)-4-(benzoyloxy)-2-(methoxymethyl)tetrahydro-3-furanyl benzoate 、
硫酸胺 、
六甲基二硅氮烷 、
三甲基溴硅烷 在
溴化铋 (2R,3R,4R,5R)-4-(Benzoyloxy)-5-[2-cyano-6-(phenethylamino)-9H-purin-9-yl]-2-(methoxymethyl)tetrahydro-3-furanyl benzoate 、 silica gel 、
methanol-dichloromethane 作用下,
以
二氯甲烷 、
乙腈 为溶剂,
以This gave the title compound (7.9 g) as a white foam的产率得到(2R,3R,4R,5R)-4-(Benzoyloxy)-5-[2-cyano-6-(phenethylamino)-9H-purin-9-yl]-2-(methoxymethyl)tetrahydro-3-furanyl benzoate