(2R,3R)-dimethyl 5-acetoxy-1,4-dioxane-2,3-dicarboxylate 、
N-Benzoyl-N,9-bis(trimethylsilyl)adenin 在
三氟甲磺酸三甲基硅酯 作用下,
以
乙腈 为溶剂,
生成
(2R,3R,5R)-dimethyl 5-(benzamido-9H-purin-9-yl)-1,4-dioxane-2,3-dicarboxylate 、 (2R,3R,5S)-dimethyl 5-(benzamido-9H-purin-9-yl)-1,4-dioxane-2,3-dicarboxylate