(E)-3-[{2-[(2-Bromo-phenyl)-hydroxy-methyl]-4-chloro-phenyl}-(2,2-dimethyl-propyl)-carbamoyl]-acrylic acid ethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
potassium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                                                        以82%的产率得到[(3R,5S)-5-(2-Bromo-phenyl)-7-chloro-1-(2,2-dimethyl-propyl)-2-oxo-1,2,3,5-tetrahydro-benzo[e][1,4]oxazepin-3-yl]-acetic acid ethyl ester