Metal- and Reagent-Free Intramolecular Oxidative Amination of Tri- and Tetrasubstituted Alkenes
作者:Peng Xiong、He-Huan Xu、Hai-Chao Xu
DOI:10.1021/jacs.7b01016
日期:2017.3.1
A metal- and reagent-free, electrochemical intramolecularoxidative amination reaction of tri- and tetrasubstituted alkenes has been developed. The electrosynthetic method proceeds through radical cyclization to form the key C-N bond, allowing a variety of hindered tri- and tetrasubstituted olefins to participate in the amination reaction. The result is the efficient synthesis of a host of alkene-bearing
Chiral phosphorate anions are shown to be highly enantioselective templates for proton-transfer catalysis. A salt generated in situ from a bridgehead amine and a BINOL-derived chiral phosphoric acid serves as an effective proton-shuttle that exhibits remarkable enantioselectivity in a bioinspired, triple co-operative catalysis involving an achiral NHC. Thioesters with a β-chiral center can be prepared