作者:William J. Ehlhardt、Bernard B. Beaulieu、Peter Goldman
DOI:10.1021/jm00397a009
日期:1988.2
relative biological activity of 4- and 5-nitroimidazoles examined previously. In contrast, all three nitroso compounds are considerably more bactericidal than their analogous nitro compounds under both aerobic and anaerobic conditions, a finding that provides direct evidence that reduction of the nitro group is responsible for activation of the nitroimidazoles. Further evidence is also consistent with
据信甲硝唑和相关的5-硝基咪唑通过硝基的还原而被活化,并且活性物质具有中等氧化态的氮官能度。然而,已证明难以治疗性地制备和分离5-硝基咪唑的活性形式。为了解决这个问题,我们从4(5)-nitroso-5(4)-制备了1-methyl-4-phenyl-5-nitrosoimidazole(3)和1-methyl-4-nitroso-5-phenylimidazole(5)-苯基咪唑(1)。我们还制备了同源的硝基咪唑。发现DNA修复缺陷的大肠杆菌突变体对1-甲基-4-苯基-5-硝基咪唑(4)和甲硝唑均敏感,但对1-甲基-4-硝基-5-苯基咪唑(6)具有相当的抵抗力。 ,与先前研究的4-和5-硝基咪唑的相对生物学活性相符的发现。相反,在需氧和厌氧条件下,所有三种亚硝基化合物均比其类似的硝基化合物具有更大的杀菌作用,这一发现提供了直接的证据,即硝基的还原是硝基咪唑活化的原因。尽管更保守的解释是简