申请人:NeoRx Corporation
公开号:US05175256A1
公开(公告)日:1992-12-29
Novel labeling reagents are useful for radiolabeling proteins such as antibodies with radionuclide metals such as .sup.99m Tc, .sup.186 Re, and .sup.188 Re. The reagents are of the following formula: ##STR1## wherein: each X is independently chosen from O, S, NH, or NR.sub.2, wherein R.sub.2 is a protecting group or an electron withdrawing group; R.sub.1 represents a protecting group, wherein each R.sub.1 is a separate protecting group or the two R.sub.1 symbols are taken together to represent a single protecting group; and each T is independently chosen from hydrogen, lower alkyl groups of from 1 to about 6 carbon atoms, electron withdrawing groups, and lower alkyl groups of from 1 to about 6 carbon atoms substituted with electron withdrawing group(s).
新型标记试剂对于使用放射性同位素金属(如.sup.99m Tc,.sup.186 Re和.sup.188 Re)对蛋白质(如抗体)进行放射性标记非常有用。该试剂具有以下结构式:##STR1## 其中:每个X独立地选择自O,S,NH或NR.sub.2,其中R.sub.2是保护基或电子提取基;R.sub.1表示保护基,其中每个R.sub.1是单独的保护基或两个R.sub.1符号在一起表示单个保护基;每个T独立地选择自氢,1至约6个碳原子的较低烷基,电子提取基和1至约6个碳原子的较低烷基,其上取代有电子提取基。