1,4-Bis-[(4S,5S,6S)-4,5-bis-(tert-butyl-dimethyl-silanyloxy)-6-methyl-5,6-dihydro-4H-pyran-2-yl]-2-bromo-cyclohexa-2,5-diene-1,4-diol 在
silica gel 、 zinc(II) chloride 作用下,
以
乙醚 为溶剂,
生成 (3S,4S,5S)-1-{5-[(4S,5S,6S)-4,5-Bis-(tert-butyl-dimethyl-silanyloxy)-6-methyl-5,6-dihydro-4H-pyran-2-yl]-3-bromo-2-hydroxy-phenyl}-3,4-bis-(tert-butyl-dimethyl-silanyloxy)-5-hydroxy-hexan-1-one