Pd(II)-Catalyzed Enantioselective Oxidative Tandem Cyclization Reactions. Synthesis of Indolines through C−N and C−C Bond Formation
作者:Kai-Tai Yip、Min Yang、Ka-Lun Law、Nian-Yong Zhu、Dan Yang
DOI:10.1021/ja060291x
日期:2006.3.1
efficient Pd(II)-catalyzed enantioselectiveoxidative tandem cyclization strategy using molecular oxygen as a green oxidant for the double 5-exo-trig cyclizations of N-(2-allylaryl) amides to afford a variety of indolines in good yields without the formation of undesired monocyclization products. By employing Pd(TFA)2/(-)-sparteine as the chiral catalyst, we obtained tandem cyclization products with high enantioselectivity
Palladium(II)-Catalyzed Oxidative Cascade Cyclization Reactions of Anilides and Anilines: Scope and Mechanistic Investigations
作者:Kai-Tai Yip、Dan Yang
DOI:10.1002/asia.201100242
日期:2011.8.1
catalyst system and molecular oxygen as a green oxidant, acrylanilides and N‐allylanilines undergo oxidative cascade cyclization to form heterocyclic rings in high yields. This methodology is applicable to acrylanilides of different substitution patterns on olefinic units. Mechanistic studies revealed that cyclization of acrylanilides proceeded through an intramolecular syn‐amidopalladation pathway. The