[1,4,7-tris(ethoxycarbonylmethyl)]1,4,7,10-tetraazacyclododecane hydrobromide 、 2-[1,4,7-tris(tert-butoxycarbonylmethyl)-1,4,7,10-tetraazacyclododecan-1-yl]-N-[4-(2-chloroacetylaminophenyl)]acetamide 在
碳酸氢钠 作用下,
以
乙腈 为溶剂,
以69%的产率得到2-[1,4,7-tris(tert-butoxycarbonylmethyl)-1,4,7,10-tetraazacyclododecan-1-yl]-({acetaminophenylcarbamoyl}methyl)-[1,4,7,10-tetraazacyclododec-1-yl]acetic acid ethyl ester