benzyl (5R)-5-[(2S)-2-[[(2S)-3-(5-iodo-2-propan-2-yloxyphenyl)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoyl]amino]-3-[[(2S)-1-methoxy-1-oxo-3-[2-propan-2-yloxy-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]propan-2-yl]amino]-3-oxopropyl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylate 在
[3-(1,3-(MeO)2-C
6H
3-)C
6H
4-Cy
2P]2PdCl
2 四丁基氟化铵 、
potassium carbonate 作用下,
以
水 、
甲苯 为溶剂,
反应 0.5h,
以50%的产率得到(8S,11S,14S)-11-((R)-3-Benzyloxycarbonyl-2,2-dimethyl-oxazolidin-5-ylmethyl)-14-tert-butoxycarbonylamino-5,17-diisopropoxy-10,13-dioxo-9,12-diaza-tricyclo[14.3.1.1
2,6]henicosa-1(19),2,4,6(21),16(20),17-hexaene-8-carboxylic acid methyl ester