1-[(4S,5S,6S)-4,5-Bis-(tert-butyl-dimethyl-silanyloxy)-6-methyl-5,6-dihydro-4H-pyran-2-yl]-4-(tert-butyl-dimethyl-silanyloxy)-4-(5,6-dihydro-4H-pyran-2-yl)-cyclohexa-2,5-dienol                                                                                                                                                              在
                                                                                                                                                                                 zinc(II) chloride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醚                                                                                  为溶剂,
                                                                                                                                                                                        以99%的产率得到(2S,3S,4S)-3,4-Bis-(tert-butyl-dimethyl-silanyloxy)-6-[4-(tert-butyl-dimethyl-silanyloxy)-3-(5,6-dihydro-4H-pyran-2-yl)-phenyl]-2-methyl-3,4-dihydro-2H-pyran