Synthesis of nitrogen heterocycles via Pd-catalyzed cross-coupling of o-alkenyl anilides with vinylic halides and triflates
作者:Richard C. Larock、Paola Pace、Hoseok Yang、Charles E. Russell、Sandro Cacchi、Giancarlo Fabrizi
DOI:10.1016/s0040-4020(98)00589-4
日期:1998.8
The palladium-catalyzed cross-coupling of o-allylic and o-vinylic anilides with vinylic halides and triflates produces substituted nitrogen heterocycles in good to high yields by a process involving vinylpalladium addition to the olefin, rearrangement to a π-allylpalladium intermediate and subsequent intramolecular nucleophilic displacement of palladium. Different reactivity and regioselectivity in the
Selenium-Catalyzed Oxidative C(sp<sup>2</sup>)–H Amination of Alkenes Exemplified in the Expedient Synthesis of (Aza-)Indoles
作者:Stefan Ortgies、Alexander Breder
DOI:10.1021/acs.orglett.5b01156
日期:2015.6.5
A new selenium-catalyzed protocol for the direct, intramolecular amination of C(sp2)–H bonds using N-fluorobenzenesulfonimide as the terminal oxidant is reported. This method enables the facile formation of a broad range of diversely functionalizedindoles and azaindoles derived from easily accessible ortho-vinyl anilines and vinylated aminopyridines, respectively. The procedure exploits the pronounced