2-(4-bromo-phenyl)-4-(tert-butyl-dimethyl-silanyloxy)-butyric acid ethyl ester 、
tert-butyl (2-acrylamidophenyl)carbamate 以gives key building block 2-{4-[2-(2-tert-butoxycarbonylamino-phenylcarbamoyl)-vinyl]-phenyl}-4-hydroxy-butyric acid ethyl ester (II)的产率得到(E)-2-{4-[2-(2-tert-butoxycarbonylamino-phenylcarbamoyl)-vinyl]-phenyl}-4-(tert-butyl-dimethyl-silanyloxy)-butyric acid ethyl ester