申请人:Immunomedics, Inc.
公开号:EP0220899A1
公开(公告)日:1987-05-06
A selective bifunctional sequential linker has the formula
Y=C=N-Q-A-C(O)-Z
wherein Q is a homoaromatic or heteroaromatic ring system; A is a single bond or an unsubstituted or substituted divalent C1-30 bridging group; Y is O or S; and Z is Cl, Br, I, N₃, N-succinimidyloxy, imidazolyl, 1-benzotriazolyloxy, OAr where Ar is an electron-deficient activating aryl group, or OC(O)R where R is -A-Q-N=C=Y or C4-20 tertiary-alkyl. A method for activating an amine function towards reaction with a second amine involves reacting the amine with the foregoing linker. The resultant isocyanate or isothiocyanate derivative can then be reacted with a second amine to form a urea or thiourea conjugate.
The linker is useful for producing conjugates of ligands with amine-containing polymers and/or proteins, especially for forming antibody conjugates with chelators, drugs, enzymes, detectable labels and the like.
一种选择性双官能团顺序连接剂的结构式为
Y=C=N-Q-A-C(O)-Z
其中 Q 是同芳香族或杂芳香族环系;A 是单键或未取代或取代的二价 C1-30 桥基;Y 是 O 或 S;Z 是 Cl、Br、I、N₃、N-琥珀酰亚胺氧基、咪唑基、1-苯并三唑氧基、OAr(其中 Ar 是缺电子活化芳基)或 OC(O)R(其中 R 是-A-Q-N=C=Y 或 C4-20 叔烷基)。活化胺功能以与第二胺反应的方法包括使胺与前述连接剂反应。生成的异氰酸酯或异硫氰酸酯衍生物可与第二胺反应,形成脲或硫脲共轭物。
该连接剂可用于生产配体与含胺聚合物和/或蛋白质的共轭物,特别是与螯合剂、药物、酶、可检测标签等形成抗体共轭物。