N,N-bis-[2-(2-bromopropionylaminoacetylamino)ethyl]-5-[(2-bromopropionyl)methylamino]-2,4,6-triiodoisophthalic acid amide 、
Tribenzyl 1,4,7,10-Tetraazacyclododecane-1,4,7-tricarboxylate 在
sodium carbonate 作用下,
以
乙腈 为溶剂,
反应 20.0h,
以43%的产率得到2,4,6-triiodo-5-(2-{10-[1,4,7-tris-(benzyloxycarbonyl)-1,4,7,10-tetraazacyclododecanyl]}-propionyl)methylaminoisophthalic acid N,N-bis-(3,6-diaza-4,7-dioxo-8-methyloctane-1,5-diyl-{10-[1,4,7-tris-(benzyloxycarbonyl)-1,4,7,10-tetraazacyclododecanyl]})amide