萘-2-胺与呋喃-2-羰基氯在丙-2-醇中的缩合得到N-(萘-2-基)呋喃-2-羧酰胺,将其用过量的P 2 S 5在无水甲苯中处理以获得相应的硫代酰胺。在碱性介质中用六氰基铁酸钾(III)氧化后者,得到2-(呋喃-2-基)萘并[2,1- d ] [1,3]噻唑。提出了其形成的可能机理,并通过量子化学计算证实了涉及萘片段C 1的闭环。2-(呋喃-2-基)萘[2,1- d]的亲电取代反应] [1,3]噻唑(硝化,溴化,甲酰化和酰化)仅涉及呋喃环的5位。
萘-2-胺与呋喃-2-羰基氯在丙-2-醇中的缩合得到N-(萘-2-基)呋喃-2-羧酰胺,将其用过量的P 2 S 5在无水甲苯中处理以获得相应的硫代酰胺。在碱性介质中用六氰基铁酸钾(III)氧化后者,得到2-(呋喃-2-基)萘并[2,1- d ] [1,3]噻唑。提出了其形成的可能机理,并通过量子化学计算证实了涉及萘片段C 1的闭环。2-(呋喃-2-基)萘[2,1- d]的亲电取代反应] [1,3]噻唑(硝化,溴化,甲酰化和酰化)仅涉及呋喃环的5位。
Oxidation-induced ortho-selective C–H bond functionalization of 2-naphthylamine derivative
作者:Dongchao Zhang、Zhiliang Huang、Aiwen Lei
DOI:10.1007/s11426-018-9218-5
日期:2018.10
Selective C–H bond functionalization has been emerged as a versatile strategy for the construction of new chemical bonds. In the past decades, the directing group (DG)-assisted C–H bond activation has been developed as one of the most efficient methods for selective C–H functionalization. Although a great progress has been made by utilizing this traditional method, developing new strategy for selective C–H bond functionalization is still highly demanded. Hence, a novel oxidation-induced C–H bond functionalization method was demonstrated in this work. By this new method, ortho-C(sp2)–H chlorination of N-substituted 2-naphthylamine was realized in a highly selective manner.