2,3,5,6-四氟苯酚 、
4-[[7-[(1,5-dicarboxy-3-methylpentan-3-yl)amino]-4-(9H-fluoren-9-ylmethoxycarbonylamino)-4-methyl-7-oxoheptanoyl]amino]-4-methylheptanedioic acid 在
4-甲基苯磺酸吡啶 、
N,N'-二环己基碳二亚胺 作用下,
以
二氯甲烷 为溶剂,
反应 16.0h,
以76%的产率得到bis(2,3,5,6-tetrafluorophenyl) 4-[[4-(9H-fluoren-9-ylmethoxycarbonylamino)-4-methyl-7-[[4-methyl-1,7-dioxo-1,7-bis(2,3,5,6-tetrafluorophenoxy)heptan-4-yl]amino]-7-oxoheptanoyl]amino]-4-methylheptanedioate