methyl (1S)-1-[({(1S,3S,4S)-4-{[(2S)-2-amino-3,3-dimethylbutanoyl]amino}-3-hydroxy-5-phenyl-1-[4-(2-pyridinyl)benzyl]pentyl}amino)carbonyl]-2,2-dimethylpropylcarbamate trifluoroacetate 、
1-chlorocarbonyl-1-methyl ethyl acetate 在
三乙胺 作用下,
以
1,4-二氧六环 为溶剂,
反应 1.0h,
以82%的产率得到methyl (1S,4S,6S,7S,10S)-7-benzyl-1,10-di-tert-butyl-6-hydroxy-14,14-dimethyl-2,9,12,15-tetraoxo-4-(4-pyridin-2-ylbenzyl)-13-oxa-3,8,11-triazahexadec-1-ylcarbamate