In some embodiments, the present invention pertains to a method for conjugating a first compound to a second compound wherein the conjugation involves an electrophilic moiety. The method comprises reacting the first compound with the second compound to form a conjugate. The improvement in embodiments of the present invention comprises adding a nucleophilic reagent to the conjugate wherein the nucleophilic reagent forms a neutral product upon reaction with unreacted electrophilic moieties of the conjugate. In some embodiments, the nucleophilic reagent is substantially non-reactive with disulfide bonds in the event that the conjugate comprises disulfide bonds. The conjugate formed is doubly deactivated because the other moiety for linking to the electrophilic moiety is also deactivated.
在某些实施方案中,本发明涉及一种将第一化合物与第二化合物共轭的方法,其中共轭涉及亲电分子。该方法包括使第一化合物与第二化合物反应形成共轭物。本发明实施例中的改进包括向共轭物中加入亲核试剂,其中亲核试剂与共轭物中未反应的亲电分子反应后形成中性产物。在某些实施方案中,如果共轭物包含二
硫键,亲核试剂基本上不与二
硫键反应。形成的共轭物是双重失活的,因为用于连接亲电分子的另一个分子也失活了。