在回流的甲苯或二甲苯中,用五硫化二磷处理了一系列的苄基单芳烃(1)。发生1的亚硫酰化很容易通过环化反应提供2个H-苯并-1,4-噻嗪(2)或吲哚(4),这在很大程度上取决于芳基氨基间位取代基的性质。提出了用于这些重排的机制。此外,随后氧化2得到苯并噻唑(3)。所有化合物均通过IR,MS,13 C和1 H NMR进行了全面表征。
Rh-Catalyzed oxidative C–H activation/annulation: converting anilines to indoles using molecular oxygen as the sole oxidant
作者:Guoying Zhang、Hui Yu、Guiping Qin、Hanmin Huang
DOI:10.1039/c3cc49751h
日期:——
A practical and efficient Rh(III)-catalyzed aerobic C-Hactivation has been developed for the facile synthesis of a broad range of indoles from simple anilines and alkynes. The protocol could be conducted under mild conditions and used environmentally friendly oxygen as the sole clear oxidant.