N2-(2-((2R,5S)-5-(((S)-2-amino-4-(tert-butoxy)-4-oxobutanamido)methyl)-1,4-dibenzyl-3,6-dioxopiperazin-2-yl)acetyl)-Nw-((4-methoxy-2,3,6-trimethylphenyl)sulfonyl)-L-arginylglycine 在
N-羟基-7-氮杂苯并三氮唑 、
N,N-二异丙基乙胺 、
Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 1.0h,
以58%的产率得到tert-butyl 2-((1S,5S,11S,15R)-16,18-dibenzyl-11-(3-(3-((4-methoxy-2,3,6-trimethylphenyl)sulfonyl)guanidino)propyl)-4,7,10,13,17,19-hexaoxo-3,6,9,12,16,18-hexaazabicyclo[13.2.2]nonadecan-5-yl)acetate