(2S)-2-[[(2S)-2-[[2-[2-[[(2S)-1-[2-[2-[[(2S)-2-aminopropanoyl]amino]phenyl]anilino]-1-oxo-3-phenylpropan-2-yl]carbamoyl]phenyl]benzoyl]amino]-3-phenylpropanoyl]amino]-3-methylbutanoic acid;2,2,2-trifluoroacetic acid 在
N,N′-二叔丁基碳二亚胺 、
1-羟基苯并三唑 、
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以70%的产率得到(10S,27S,30S,33S)-10,27-dibenzyl-33-methyl-30-propan-2-yl-8,11,26,29,32,35-hexazapentacyclo[34.4.0.02,7.013,18.019,24]tetraconta-1(40),2,4,6,13,15,17,19,21,23,36,38-dodecaene-9,12,25,28,31,34-hexone