methyl (2S)-2-[[(2R)-2-[[(2R)-2-(3,5-dihydroxy-4-methoxyphenyl)-2-[[(2S)-2-[[(2R)-3-(4-fluoro-3-nitrophenyl)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoyl]amino]propanoyl]amino]acetyl]amino]-2-(4-methoxyphenyl)acetyl]amino]-3-(4-fluoro-3-nitrophenyl)propanoate 在
cesium fluoride 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以60%的产率得到methyl (14S,17R,20R,23S,26R)-35-methoxy-17-(4-methoxyphenyl)-23-methyl-26-[(2-methylpropan-2-yl)oxycarbonylamino]-10,30-dinitro-16,19,22,25-tetraoxo-2,8-dioxa-15,18,21,24-tetrazapentacyclo[26.2.2.29,12.13,7.05,20]pentatriaconta-1(30),3(35),4,6,9,11,28,31,33-nonaene-14-carboxylate