Hypoxia-Selective Antitumor Agents. 10. Bis(nitroimidazoles) and Related Bis(nitroheterocycles): Development of Derivatives with Higher Rates of Metabolic Activation under Hypoxia and Improved Aqueous Solubility
作者:Michael P. Hay、Ho H. Lee、William R. Wilson、Peter B. Roberts、William A. Denny
DOI:10.1021/jm00011a013
日期:1995.5
analogues could not be prepared by direct reduction of precursor amides such as 4 and were most conveniently synthesized by aza-Wittig condensation of the appropriate azide and aldehyde components. The amine-linked compounds were more cytotoxic than 4, with the symmetrical bis(2-nitroimidazole) derivatives (13 and 14) up to 9-fold more potent. They showed hypoxic selectivities comparable to that of 4 (ca
先前描述的化合物N- [2-(2-甲基-5-硝基咪唑-1H-基)乙基] -4-(2-硝基咪唑-1H-基)丁酰胺的一系列类似物(4),一种新型的低氧细胞已经制备了细胞毒素和放射增敏剂,并对其体外的低氧选择性细胞毒性和低氧细胞放射增敏进行了评估。设计新的衍生物以克服4的低水溶性和在低氧条件下的缓慢杀灭动力学。硝基杂环单元对溶解度有显着影响,其中3-硝基三唑的溶解度是相应的2-硝基咪唑的约6倍。具有一系列中性接头链(多羟基,链烷磺酰胺和双酰胺)的类似物仅显示出略微改善的溶解度,无法完全评估。然而,一系列带有阳离子胺连接基的类似物具有足够的水溶性(最高280 mM)。不能通过直接还原前体酰胺(例如4)来制备胺类似物,并且最方便地通过适当的叠氮化物和醛组分的氮杂-维蒂希缩合合成胺类似物。胺连接的化合物比4具有更高的细胞毒性,对称的双(2-硝基咪唑)衍生物(13和14)的效力最高可达9倍。他们表现出的