作者:Alessandro Manfrin、Nadine Borduas-Dedekind、Kate Lau、Kristopher McNeill
DOI:10.1021/acs.joc.8b02684
日期:2019.3.1
present in the environment and in natural waters. From previous studies, they seem susceptible to oxidation by singlet oxygen (1O2); therefore, we designed and synthesized model oxazole- and thiazole-peptides and measured their 1O2 bimolecular reaction rate constants, showing slow photooxidation under environmental conditions. We reasoned their stability through the electron-withdrawing effect of the carboxamide
恶唑和噻唑通常在非核糖体肽(NRP)和核糖体合成的翻译后修饰肽(RiPPs)中发现,它们是环境和天然水中存在的重要生物分子。从以前的研究来看,它们似乎很容易被单线态氧(1O2)氧化。因此,我们设计并合成了模型恶唑和噻唑肽,并测量了它们的1O2双分子反应速率常数,在环境条件下显示出缓慢的光氧化作用。我们通过羧酰胺取代基的吸电子作用推论了它们的稳定性。阐明了反应产物并支持了涉及环加成反应然后进行一系列重排的反应机理。RiPP的第一个1O2双分子反应速率常数,