、
3,5-Bis-{2-[3,5-bis-(2-tert-butoxycarbonylamino-ethoxy)-benzoylamino]-ethoxy}-benzoic acid 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
乙腈 为溶剂,
以81%的产率得到N-[2-[3-[2-[[[3,5-bis[2-[[[3,5-bis[2-[[hydroxy-[(2-methylpropan-2-yl)oxy]methylidene]amino]ethoxy]phenyl]-hydroxymethylidene]amino]ethoxy]phenyl]-hydroxymethylidene]amino]ethoxy]-5-methoxycarbonylphenoxy]ethyl]-3,5-bis[2-[[[3,5-bis[2-[[hydroxy-[(2-methylpropan-2-yl)oxy]methylidene]amino]ethoxy]phenyl]-hydroxymethylidene]amino]ethoxy]benzenecarboximidic acid