Benzoic acid (1S,2S,3R,5R,7S,8S,10R,13S)-10-acetoxy-1-hydroxy-5-methanesulfonyloxy-8,12,15,15-tetramethyl-4-methylene-9-oxo-7-(2,2,2-trichloro-ethoxycarbonyloxy)-13-triisopropylsilanyloxy-tricyclo[9.3.1.03,8]pentadec-11-en-2-yl ester 在
lithium bromide 作用下,
以
丙酮 为溶剂,
以79%的产率得到Benzoic acid (1S,2S,3S,5S,7S,8S,10R,13S)-10-acetoxy-5-bromo-1-hydroxy-8,12,15,15-tetramethyl-4-methylene-9-oxo-7-(2,2,2-trichloro-ethoxycarbonyloxy)-13-triisopropylsilanyloxy-tricyclo[9.3.1.0
3,8]pentadec-11-en-2-yl ester