methyl (S)-(1-{[(2S,3S,5S)-5-amino-3-hydroxy-6-phenyl-1-[4-(pyridin-2-yl)phenyl]hexan-2-yl]amino}-3,3-dimethyl-1-oxobutan-2-yl)carbamate 、
(2S,3S)-3-methyl-2-{3-[(6-methyl-2-pyridinyl)methyl]-2,4-dioxo-1-imidazolidinyl}pentanoic acid trifluoroacetate 在
N,N-二异丙基乙胺 、
3-(二乙氧基邻酰氧基)-1,2,3-苯并三嗪-4-酮 作用下,
以
四氢呋喃 为溶剂,
反应 2.0h,
以64%的产率得到methyl (1S)-1-[({(1S,2S,4S)-2-hydroxy-4-[((2S,3S)-3-methyl-2-{3-[(6-methyl-2-pyridinyl)methyl]-2,4-dioxo-1-imidazolidinyl}pentanoyl)amino]-5-phenyl-1-[4-(2-pyridinyl)benzyl]pentyl}amino)carbonyl]-2,2-dimethylpropylcarbamate