NH2-D-Val-D-Leu-NMe-Phe-Leu-Leu-OH 在
O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、
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
二氯甲烷 为溶剂,
以8.8%的产率得到(3R,6R,9S,12S,15S)-15-benzyl-3,9,12-triisobutyl-6-isopropyl-1-methyl-1,4,7,10,13-pentaazacyclopentadecane-2,5,8,11,14-pentaone