(5S,8R,11R)-11-((tert-butoxycarbonyl)amino)-8-(3,5-dichloro-4-hydroxyphenyl)-16-hydroxy-15-iodo-6-methyl-7,10-dioxo-2-oxa-6,9-diaza-1(1,3),3(1,4)-dibenzenacycloundecaphane-5-carboxylic acid 、
D-对羟基苯甘氨酸甲酯盐酸盐 在
N-羟基-7-氮杂苯并三氮唑 、
碳酸氢钠 、
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 作用下,
以
四氢呋喃 为溶剂,
以59%的产率得到methyl (R)-2-((5S,8R,11R)-11-((tert-butoxycarbonyl)amino)-8-(3,5-dichloro-4-hydroxyphenyl)-16-hydroxy-15-iodo-6-methyl-7,10-dioxo-2-oxa-6,9-diaza-1(1,3),3(1,4)-dibenzenacycloundecaphane-5-carboxamido)-2-(4-hydroxyphenyl)acetate