9α,11α-epoxy-isoarborinyl acetate 在
三氟化硼乙醚 作用下,
以
苯 为溶剂,
反应 0.5h,
以0.003 g的产率得到Acetic acid (3S,3aS,5aR,7aR,9S,11aS,13aR,13bS)-3-isopropyl-3a,5a,8,8,11a,13a-hexamethyl-2,3,3a,4,5,5a,7,7a,8,9,10,11,11a,13,13a,13b-hexadecahydro-1H-cyclopenta[a]chrysen-9-yl ester