(E)-3-[{4-Chloro-2-[(4-fluoro-2-methoxy-phenyl)-hydroxy-methyl]-phenyl}-(2,2-dimethyl-propyl)-carbamoyl]-acrylic acid ethyl ester 在
potassium carbonate 作用下,
以
乙醇 为溶剂,
以83%的产率得到[(3R,5S)-7-Chloro-1-(2,2-dimethyl-propyl)-5-(4-fluoro-2-methoxy-phenyl)-2-oxo-1,2,3,5-tetrahydro-benzo[e][1,4]oxazepin-3-yl]-acetic acid ethyl ester