4-prop-2-ynylcarbamoyl-2-(4,7,10-tris-carboxymethyl-1,4,7,10-tetraaza-cyclododec-1-yl)-butyric acid 、
二乙基氨基甲烷膦酸酯 在
benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 36.0h,
以88%的产率得到{[2-(4,7-bis-{[(diethoxy-phosphorylmethyl)-carbamoyl]-methyl}-10-{1-[(diethoxyphosphorylmethyl)-carbamoyl]-3-prop-2-ynylcarbamoyl-propyl}-1,4,7,10-tetraazacyclododec-1-yl)-acetylamino]-methyl}-phosphonic acid diethyl ester