(E)-3-[{4-Chloro-2-[(2,5-dimethoxy-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78%的产率得到[(3R,5S)-7-Chloro-5-(2,5-dimethoxy-phenyl)-1-(2,2-dimethyl-propyl)-2-oxo-1,2,3,5-tetrahydro-benzo[e][1,4]oxazepin-3-yl]-acetic acid ethyl ester