New thiol and disulfide-containing maytansinoids bearing a mono or di-alkyl substitution on the α-carbon atom bearing the sulfur atom are disclosed. Also disclosed are methods for the synthesis of these new maytansinoids and methods for the linkage of these new maytansinoids to cell-binding agents. The maytansinoid-cell-binding agent conjugates are useful as therapeutic agents, which are delivered specifically to target cells and are cytotoxic. These conjugates display vastly improved therapeutic efficacy in animal tumor models compared to the previously described agents.
公开了一种新的含有巯基和二
硫键的马丹霉素衍
生物,其α-碳原子上带有
硫原子的位置上具有单烷基或双烷基取代。还公开了制备这些新马丹霉素衍
生物的方法以及将这些新马丹霉素衍
生物与细胞结合剂连接的方法。马丹霉素-细胞结合剂共轭物作为治疗剂具有特异性地传递到目标细胞并具有细胞毒性。与先前描述的药物相比,这些共轭物在动物肿瘤模型中显示出极大的治疗效果。