synthetic route could be readily scaled up to gram quantity without difficulty. Mechanistic studies have revealed that in situ formed selenium electrophile species may be the key intermediate for the selenocyclization process.
An effective metal-free C-H amination of N-Ts-2-alkenylanilines by using DDQ as an oxidant has been developed to afford a diverse range of substituted indoles. This protocol is operationally simple and robust, obviates the need of expensive transition-metal catalysts, and offers a broad substrate scope. A mechanism involving a radical cation generated by SET and a migratorial process via a phenonium ion intermediate is proposed.
Dirhodium(II)-Catalyzed Intramolecular CH Amination of Aryl Azides
作者:Meihua Shen、Brooke E. Leslie、Tom G. Driver
DOI:10.1002/anie.200800689
日期:2008.6.23
Metal-Free Activation of DMF by Dioxygen: A Cascade Multiple-Bond-Formation Reaction to Synthesize 3-Acylindoles from 2-Alkenylanilines
作者:Ji-Bo Wang、Yin-Long Li、Jun Deng
DOI:10.1002/adsc.201700584
日期:2017.10.4
cascade C−N, C−C and C−O multiple‐bond‐formationreaction to synthesize 3‐acylindoles from 2‐alkenylanilines with DMF (N,N‐dimethylformamide) as a one‐carbon synthon is described. This approach employed dioxygen as a terminal oxidant and oxygen donor, generally provided the 3‐acylindoles in moderate to good yields. Moreover, the mechanistic investigation unambiguously revealed that the 2‐carbon of 3‐acylindole