{(2S,4S,6S)-4-[(tert-butyldiphenylsilyl)oxy]-6-[((2R,4S,6S)-4-hydroxy-6-(tosyloxymethyl)tetrahydro-2H-pyran-2-yl)methyl]tetrahydro-2H-pyran-2-yl}methyl 4-methylbenzenesulfonate 在
sodium iodide 作用下,
以
丙酮 为溶剂,
反应 2.0h,
以84%的产率得到(2R,4S,6S)-2-{[(2S,4S,6S)-4-(tert-butyldiphenylsilyl)oxy-6-(iodomethyl)tetrahydro-2H-pyran-2-yl]methyl}-6-(iodomethyl)tetrahydro-2H-pyran-4-ol