Oxazines are an important class of compounds in oxazine ligands and medical chemistry. Here, we describe a linear-selective allylation of imines with allyl electrophiles via cross-electrophile coupling reactions, followed by cyclization with halogenated reagents, providing a new strategy to afford oxazine compounds with a tetrasubstituted carbon center. Mechanistic studies indicate that α-amino carbanion
恶嗪是恶嗪
配体和医学
化学中的一类重要化合物。在这里,我们描述了通过交叉亲电子偶联反应,
亚胺与烯丙基亲电子试剂的线性选择性烯丙基化,然后用卤化试剂环化,提供了一种提供具有四取代碳中心的恶嗪化合物的新策略。机理研究表明,通过连续的单电子转移过程产生的α-
氨基碳负离子是光氧化还原/
钯催化中亲核试剂攻击π-烯丙基
钯的关键中间体。