tert-Butyl-((2S,3S,4S,6S)-6-fluoro-4-methoxy-2-methyl-tetrahydro-pyran-3-yloxy)-dimethyl-silane 、
(2S,3S,4S,6S)-4-Methoxy-2-methyl-6-phenylsulfanyl-tetrahydro-pyran-3-ol 在
4 A molecular sieve 、 silver perchlorate 、 tin(ll) chloride 作用下,
以
乙醚 为溶剂,
以65%的产率得到tert-Butyl-[(2S,3S,4S,6S)-4-methoxy-6-((2S,3S,4S,6S)-4-methoxy-2-methyl-6-phenylsulfanyl-tetrahydro-pyran-3-yloxy)-2-methyl-tetrahydro-pyran-3-yloxy]-dimethyl-silane