4-((4-((3,4-difluoro-2-((2-fluoro-4-iodophenyl)amino)benzamido)oxy)butyl)amino)-4-oxobutanoic acid 、
[(2S,5R,8S,11S)-8-(4-Amino-butyl)-11-(3-guanidino-propyl)-5-(4-hydroxy-benzyl)-3,6,9,12,15-pentaoxo-1,4,7,10,13-pentaaza-cyclopentadec-2-yl]-acetic acid 在
benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
反应 0.5h,
以52%的产率得到2-((2S,5R,8S,11S)-8-(1-(3,4-difluoro-2-((2-fluoro-4-iodophenyl)amino)phenyl)-1,9,12-trioxo-3-oxa-2,8,13-triazaheptadecan-17-yl)-11-(3-guanidinopropyl)-5-(4-hydroxybenzyl)-3,6,9,12,15-pentaoxo-1,4,7,10,13-pentaazacyclopentadecan-2-yl)acetic acid