(3S,6S)-6-allyl-3-methyltetrahydro-2H-pyran-2-yl acetate 、
phenyl (3R,5S,7E)-5-(benzyloxy)-3-{[tert-butyl(dimethyl)silyl]oxy}-9-[(trimethylsilyl)oxy]deca-7,9-dienoate 在
三氟化硼乙醚 、
bismuth (III) nitrate pentahydrate 作用下,
以
二氯甲烷 、
乙腈 为溶剂,
以78%的产率得到phenyl [(2R,4S,6S)-6-{3-[(2R,3S,6S)-6-allyl-3-methyltetrahydro-2H-pyran-2-yl]-2-oxopropyl}-4-(benzyloxy)tetrahydro-2H-pyran-2-yl]acetate