Copper(II) Carboxylate-Promoted Intramolecular Carboamination of Alkenes for the Synthesis of Polycyclic Lactams
作者:Peter H. Fuller、Sherry R. Chemler
DOI:10.1021/ol702401w
日期:2007.12.1
intramolecular carboamination reactions of variously substituted gamma-alkenyl amides have been investigated. These oxidative cyclization reactions efficiently provide polycyclic lactams, useful intermediates in nitrogen heterocycle synthesis, in good to excellent yields. The efficiency of the carboamination process is dependent upon the structure of the amide backbone as well as the nitrogen substituent.
已经研究了羧酸铜 (II) 促进的各种取代 γ-烯基酰胺的分子内碳胺化反应。这些氧化环化反应有效地提供了多环内酰胺,它是氮杂环合成中有用的中间体,产率很高。碳胺化过程的效率取决于酰胺主链的结构以及氮取代基。
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