甲基溴化镁 、 、
((2R,3R,5R)-3-fluoro-5-methoxy-4-oxotetrahydrofuran-2-yl)methyl benzoate 、
水 、
((2R,3R,4R,5R)-3-fluoro-4-hydroxy-5-methoxy-4-methyltetrahydrofuran-2-yl)methyl benzoate 在
四氯化钛 乙醚 、
Sodium sulfate-III 作用下,
以
乙醚 为溶剂,
反应 6.0h,
以to give 170 mg (0.6 mmol, 26%) of ((2R,3R,4S,5R)-3-fluoro-4-hydroxy-5-methoxy-4-methyltetrahydrofuran-2-yl)methyl benzoate and ((2R,3R,4R,5R)-3-fluoro-4-hydroxy-5-methoxy-4-methyltetrahydrofuran-2-yl)methyl benzoate as an inseparable gummy solid的产率得到((2R,3R,4S,5R)-3-fluoro-4-hydroxy-5-methoxy-4-methyltetrahydrofuran-2-yl)methyl benzoate