4-[(4'-{(R)-3-[3-((R)-2-Hydroxy-propylamino)-3-methyl-butyrylamino]-2-oxo-2,3,4,5-tetrahydro-benzo[b]azepin-1-ylmethyl}-biphenyl-2-carbonyl)-amino]-butyric acid 在
4-二甲氨基吡啶 、
N,N'-二环己基碳二亚胺 作用下,
以
氯仿 为溶剂,
反应 24.0h,
以56%的产率得到(12R,19R)-8,9,13,14,15,16,18,19,20,21-decahydro-12,15,15-trimethyl-6H-28,31-etheno-19,26-methano-dibenz[l,t][1,4,8,14,23]oxatetraazacycloheptacosine-5,10,17,34(7H,12H,27H)-tetrone