Tert-butyl 4-[[ethyl-[4-[[ethyl-[4-(ethylaminomethyl)benzoyl]amino]methyl]benzoyl]amino]methyl]benzoate 、
4-[[[4-[[[4-[[[4-[[[4-[[[4-[[Benzoyl(ethyl)amino]methyl]benzoyl]-ethylamino]methyl]benzoyl]-ethylamino]methyl]benzoyl]-ethylamino]methyl]benzoyl]-ethylamino]methyl]benzoyl]-ethylamino]methyl]benzoic acid 在
(1-cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylaminomorpholinocarbenium hexafluorophosphate 、
三乙胺 作用下,
以
二氯甲烷 、
N,N-二甲基甲酰胺 为溶剂,
反应 72.0h,
以55%的产率得到Tert-butyl 4-[[[4-[[[4-[[[4-[[[4-[[[4-[[[4-[[[4-[[[4-[[benzoyl(ethyl)amino]methyl]benzoyl]-ethylamino]methyl]benzoyl]-ethylamino]methyl]benzoyl]-ethylamino]methyl]benzoyl]-ethylamino]methyl]benzoyl]-ethylamino]methyl]benzoyl]-ethylamino]methyl]benzoyl]-ethylamino]methyl]benzoyl]-ethylamino]methyl]benzoate