ethyl (2-{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]-1-hydroxyethyl}-1,3-thiazol-4-yl)acetate 在
manganese dioxide silica gel 、
ethyl acetate n-hexane 作用下,
以
四氢呋喃 为溶剂,
反应 96.0h,
以to obtain ethyl (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]acetyl}-1,3-thiazol-4-yl)acetate (71 mg, 0.11 mmol, 48%) as a white crystal的产率得到ethyl (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]acetyl}-1,3-thiazol-4-yl)acetate