Design and Synthesis of 2-Nitroimidazoles with Variable Alkylating and Acylating Functionality
作者:Thomas Winters、Anthony Sercel、Carla Suto、William Elliott、Wilbur Leopold、Judith Leopold、Hollis Showalter
DOI:10.1248/cpb.c13-00903
日期:——
The synthesis of a small series of 2-nitroimidazoles in which the β-amino alcohol side chain was amidated with a range of alkylating/acylating functionality is described. Synthetic methodologies were developed that generally provided for selective N-acyl versus N,O-bisacyl products. In vitro, target analogs showed minimal radiosensitization activity, with only a few exhibiting a sensitizer enhancement ratio (SER) >2.0 and C1.6 values comparable to reference agents RB-6145 and RSU-1069. In an assay to determine potential to alkylate biomolecules, representative analogs showed <1% of the alkylating activity of RSU-1069. In vivo, one analog showed an enhancement ratio of 1.6 relative to vehicle control when tested in B6C3F1 mice with an implanted KHT sarcoma. The data reinforce prior findings that there is a correlation between alkylation potential and in vivo activity.
描述了一小系列 2-硝基咪唑的合成,其中 β-氨基醇侧链被酰胺化,具有一系列烷基化/酰化功能。开发了通常提供选择性 N-酰基与 N,O-双酰基产物的合成方法。在体外,目标类似物表现出最小的放射增敏活性,只有少数表现出与参考剂 RB-6145 和 RSU-1069 相当的增敏剂增强比 (SER) >2.0 和 C1.6 值。在一项测定生物分子烷基化潜力的测定中,代表性类似物显示 RSU-1069 的烷基化活性<1%。在体内,当在植入 KHT 肉瘤的 B6C3F1 小鼠中进行测试时,一种类似物相对于载体对照显示出 1.6 的增强比。这些数据强化了先前的发现,即烷基化潜力和体内活性之间存在相关性。