(4R)-4-((2R,3R,4S,5S,6S)-4-(benzyloxy)-6-methoxy-3,5-dimethyltetrahydro-2H-pyran-2yl)-1-(2,5,5-trimethyl-1,3-dioxan-5-yl)pentan-3-ol 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以60%的产率得到(1R,3S,4R,5R,6R,7S,8S)-4,6,8-trimethyl-7-phenylmethoxy-3-[2-(2,5,5-trimethyl-1,3-dioxan-2-yl)ethyl]-2,9-dioxabicyclo[3.3.1]nonane