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
Pd(II)/<sup><i>t</i></sup>Bu-quinolineoxazoline: An Air-Stable and Modular Chiral Catalyst System for Enantioselective Oxidative Cascade Cyclization
作者:Wei He、Kai-Tai Yip、Nian-Yong Zhu、Dan Yang
DOI:10.1021/ol902348t
日期:2009.12.17
An air-stable and structurally tunable chiral tBu-quinolineoxazoline/Pd(II) catalyst system has been developed for the enantioselective oxidative cascade cyclization of a variety of disubstituted olefinic substrates, with the apparent advantages of good yields and excellent enantioselectivities (up to 98% ee) and diastereoselectivities (dr >24:1). A transition-state model has also been proposed to