(-)-(E)-2-Bromo-1-<(2R,3S)-4-<(tert-butyldimethylsilyl)oxy>-2,2-(ethylenedioxy)-6-hydroxy-5-methyl-1-hexylidene>-2-cyclohexene 在
tris(6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionato)ytterbium
正丁基锂 作用下,
生成 (E)-(4R,6R)/(E)-(4S,6S)-10-<(2S,3S)-4-<(tert-Butyldimethylsilyl)oxy>-2,2-(ethylenedioxy)-6-hydroxy-5-methyl-1-hexylidene>-4-ethoxy-3-oxabicyclo<4.4.0>non-1-ene