2'-[((S)-2-{(S)-2-[(R)-2-{(S)-2-Amino-3-[4-(2,6-dichloro-benzyloxy)-phenyl]-propionylamino}-3-(1H-indol-3-yl)-propionylamino]-6-benzyloxycarbonylamino-hexanoylamino}-3-methyl-butyrylamino)-methyl]-biphenyl-3-carboxylic acid 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 14.0h,
以81%的产率得到{4-[(11S,14S,17R,20S)-20-[4-(2,6-Dichloro-benzyloxy)-benzyl]-17-(1H-indol-3-ylmethyl)-11-isopropyl-10,13,16,19,22-pentaoxo-9,12,15,18,21-pentaaza-tricyclo[21.3.1.0
2,7]heptacosa-1(26),2,4,6,23(27),24-hexaen-14-yl]-butyl}-carbamic acid benzyl ester