4-[2-[[(3R,5S)-7-chloro-5-(2,3-dimethoxyphenyl)-1-(3-hydroxy-2,2-dimethylpropyl)-2-oxo-1,2,3,5-tetrahydro-4,1-benzoxazepin-3-yl]acetylamino]ethyl]benzoate 、
sodium hydroxide 、
乙醇 在
methyl 、
乙酸乙酯 、
Sodium sulfate-III 、
甲醇乙酸乙酯 作用下,
以
水 为溶剂,
反应 0.5h,
以to obtain 4-[2-[[(3R,5S)-7-chloro-5-(2,3-dimethoxyphenyl)-1-(3-hydroxy-2,2-dimethylpropyl)-2-oxo-1,2,3,5-tetrahydro-4,1-benzoxazepin-3-yl]acetylamino]ethyl]benzoic acid (0.25 g, 0.400 mmol, 49%) as a colorless amorphous powder的产率得到4-[2-[[(3R,5S)-7-chloro-5-(2,3-dimethoxyphenyl)-1-(3-hydroxy-2,2-dimethylpropyl)-2-oxo-1,2,3,5-tetrahydro-4,1-benzoxazepin-3-yl]acetylamino]ethyl]benzoic acid