2-Nitroimidazole dual-function bioreductive drugs: studies on the effects of regioisomerism and side-chain structural modifications on differential cytotoxicity and radiosensitization by aziridinyl and oxiranyl derivatives
作者:Matthew A. Naylor、Michael D. Threadgill、Paul Webb、Ian J. Stratford、Miriam A. Stephens、E. Martin Fielden、Gerald E. Adams
DOI:10.1021/jm00097a015
日期:1992.9
of a cyclohexane side chain in 1,2-cis-2,3-trans-3-aziridin-1-yl-2-hydroxy-1-(2-nitroimidazol+ ++-1- yl)cyclohexane (26) abolished hypoxia-selective toxicity and unexpectedly reduced radiosensitizing efficiency. Of the aziridines, 1-(2-nitro-1-imidazolyl)-2-methyl-3-(1-aziridinyl)-2-propanol (20) was comparable in efficacy to 1 as a bioreductively-activated cytotoxin with slightly lower aerobic toxicity;
已经制备了一系列侧链终止于或含有氮丙啶基和环氧乙烷基团的 2-硝基咪唑,并在体外评估了这些化合物作为缺氧选择性生物还原活化的细胞毒素,并测试了选定的化合物对缺氧哺乳动物细胞的放射增敏特性。化合物是具有附加甲基的强效双功能 2-硝基咪唑 α-[(1-氮丙啶基)-甲基]-2-硝基-1H-咪唑-1-乙醇 (RSU-1069, 1) 类似物的区域异构体或不同侧链长度和类型的相关环氧乙烷。环氧乙烷基衍生物几乎没有差异毒性,测试的那些作为放射增敏剂效果较差,虽然这些性质受侧链长度的影响,但差异并不大。与 1 相关但侧链长度增加的氮丙啶基化合物不稳定。1在不同区域的甲基化对放射增敏作用的影响很小,并且作为差异细胞毒药物与1相比没有明显的优势。发现 C-3 的进行性甲基化会增加毒性但会降低缺氧选择性。在 1,2-cis-2,3-trans-3-aziridin-1-yl-2-hydroxy-1-(2-nitroimidazol+