(2R,4aS,6aS,6bR,8aS,10S,12aS,13aS,14aS,14bR)-methyl 10-acetoxy-6b-hydroxy-2,4a,6a,9,9,12a,14a-heptamethyl-13-oxodocosahydrobenzo[f]naphtho[2,1-a]azulene-2-carboxylate 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 18.0h,
以92%的产率得到(2R,4aS,6aS,6bR,8aS,10S,12aS,13aS)-methyl 10-acetoxy-2,4a,6a,6b,9,9,12a-heptamethyl-13-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,13,13a,14-icosahydrobenzo[f]naphtho[2,1-a]azulene-2-carboxylate