methyl (2S)-3-(3-iodo-4-methoxyphenyl)-2-[[(2S)-2-[[(2S)-3-(3-iodo-4-methoxyphenyl)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoyl]amino]-4-methylpentanoyl]amino]propanoate 在
(1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride 、
potassium acetate 、
联硼酸频那醇酯 作用下,
以
二甲基亚砜 为溶剂,
以45%的产率得到(8S,11S,14S)-14-tert-Butoxycarbonylamino-11-isobutyl-3,19-dimethoxy-10,13-dioxo-9,12-diaza-tricyclo[14.3.1.1
2,6]henicosa-1(19),2(21),3,5,16(20),17-hexaene-8-carboxylic acid methyl ester