A compound of the formula: wherein R
1
is selected from H, methyl, ethyl, carboxyl protecting groups and hydrophilic moieties, R
2
and R
3
are independently selected from H, methyl, ethyl and carboxyl protecting groups, R
4
is selected from H, methyl, ethyl, hydrophilic moieties and carboxyl protecting groups, and R
5
is an aryl, heteroaryl, alkyl or a combination of these groups and is substituted with a carbonyl group, an aminooxy group or a functional group suitable for participating in a cycloaddition reaction. The compounds of the invention may be useful as bifunctional chelating agents which allow chemoselective attachment to targeting molecules.
该化合物的
化学式为:其中R1选自H、甲基、乙基、羧基保护基和亲
水基;R2和R3分别选自H、甲基、乙基和羧基保护基;R4选自H、甲基、乙基、亲
水基和羧基保护基;R5是芳基、杂芳基、烷基或这些基团的组合,并且被一个羰基、
氨氧基或适用于参与环加成反应的官能团所取代。该发明的化合物可用作双功能
螯合剂,可允许与靶向分子进行
化学选择性的连接。