三甲基氰硅烷 、 [(2R,3R,4R)-3-benzoyloxy-4-fluoro-5-hydroxy-4-methyl-5-(4-methylsulfanylthieno[3,4-d]pyrimidin-7-yl)oxolan-2-yl]methyl benzoate 在
三氟甲磺酸三甲基硅酯 作用下,
以
乙腈 为溶剂,
生成
[(2R,3R,4R,5R)-3-benzoyloxy-5-cyano-4-fluoro-4-methyl-5-(4-methylsulfanylthieno[3,4-d]pyrimidin-7-yl)oxolan-2-yl]methyl benzoate