Gold-catalyzed cyclization of 1-(2′-azidoaryl) propynols: synthesis of polysubstituted 4-quinolones
作者:Xiang Wu、Lang-Lang Zheng、Li-Ping Zhao、Cheng-Feng Zhu、You-Gui Li
DOI:10.1039/c9cc06652g
日期:——
An unprecedented gold-catalyzed procedure for the synthesis of polysubstituted 4-quinolones from 1-(2'-azidoaryl) propynols is described. The reaction undergoes an intramolecular nucleophilic attack of the azide group to the Au-activated triple bonds in a 6-endo-dig manner and subsequent gold-assisted expulsion of N2 to furnish an α-imino gold carbene intermediate, which triggers a 1,2-carbon migration
A facile synthesis of pyrrolo[2,3-b]quinolines via a Rh(i)-catalyzed carbodiimide-Pauson–Khand-type reaction
作者:Takao Saito、Naoki Furukawa、Takashi Otani
DOI:10.1039/b924301a
日期:——
A new straightforward synthetic method for 2,3-dihydro-1H-pyrrolo[2,3-b]quinolin-2-ones via a [RhCl(CO)2]2âdppp catalyzed PausonâKhand-type reaction of N-[2-(2-alkyn-1-yl)phenyl]carbodiimides is reported.