series of monodeuterated benzylic and allylic ethers were subjected to oxidative carbon–hydrogen bond cleavage to determine the impact of structural variation on intramolecular kinetic isotope effects in DDQ-mediated cyclization reactions. These values are compared to the corresponding intermolecular kinetic isotope effects that were accessed through subjecting mixtures of non-deuterated and dideuterated
对一系列单
氘代苄基醚和
烯丙基醚进行氧化碳氢键断裂,以确定结构变化对
DDQ 介导的环化反应中分子内动力学同位素效应的影响。将这些值与通过将非
氘化和双
氘化底物的混合物置于反应条件下获得的相应分子间动力学同位素效应进行比较。结果表明,碳氢键断裂是速率决定因素,自由基阳离子很可能是反应机制中的关键中间体。