[(S)-2-(4-Benzyloxy-3,5-dibromo-phenyl)-1-((S)-1-{4-cyano-5-[1-(2-hydroxy-phenyl)-vinyl]-oxazol-2-yl}-2-methyl-propylcarbamoyl)-ethyl]-carbamic acid tert-butyl ester 在
silver orthophosphate 、 tris(dibenzylideneacetone)dipalladium (0) 作用下,
以
四氢呋喃 为溶剂,
以41%的产率得到[(Z)-(8S,11S)-16-Benzyloxy-15-bromo-5-cyano-3-(2-hydroxy-phenyl)-8-isopropyl-10-oxo-18-oxa-6,9-diaza-tricyclo[11.3.1.1
4,7]octadeca-1(17),2,4,6,13,15-hexaen-11-yl]-carbamic acid tert-butyl ester