(4R,6R)-6-[(1R,3aR,7aR)-4-(bromomethylidene)-7a-methyl-2,3,3a,5,6,7-hexahydro-1H-inden-1-yl]-4-[tert-butyl(dimethyl)silyl]oxy-3,3-dimethyl-2-methylideneheptan-1-ol 在
氢氟酸 、
manganese(IV) oxide 作用下,
以
乙腈 、
二氯甲烷 为溶剂,
反应 25.0h,
以91%的产率得到(5S)-5-[(2R)-2-[(1R,3aR,7aR)-4-(bromomethylidene)-7a-methyl-2,3,3a,5,6,7-hexahydro-1H-inden-1-yl]propyl]-4,4-dimethyl-3-methylideneoxolan-2-one