Acetic acid (2S,5R,6S)-5-acetoxymethyl-2-isopropyl-1-methyl-3-oxo-1,2,3,4,5,6-hexahydro-benzo[e][1,4]diazocin-6-yl ester 在
benzyltrimethylammonium tribromide 、
calcium carbonate 作用下,
以
甲醇 、
二氯甲烷 为溶剂,
反应 2.0h,
以90%的产率得到[(2S,5R,6S)-6-acetyloxy-8-bromo-1-methyl-3-oxo-2-propan-2-yl-2,4,5,6-tetrahydro-1,4-benzodiazocin-5-yl]methyl acetate