The palladium catalyzed cross-coupling reaction of thiolesters with bis(iodozincio)methane or 1,1-bis(iodozincio)ethane gave Reformatsky-type enolates. They can react with some electrophiles to give the corresponding adducts and were also trapped by silylation reagents to afford silyl enol ethers. As the method applicable to the thiolester carrying ketone moiety, it afforded zinc enolates carrying
Palladium-Catalyzed Intramolecular Oxidative Alkylation of Unactivated Olefins
作者:Tao Pei、Xiang Wang、Ross A. Widenhoefer
DOI:10.1021/ja026317b
日期:2003.1.1
2,4-dione catalyzed by PdCl2(CH3CN)2 (5 mol %) in the presence of CuCl2 (2.5 equiv) at room temperature for 3 h formed 2-acetyl-3,6,6-trimethyl-2-cyclohexenone in 96% isolated yield. Palladium-catalyzedintramolecular oxidative alkylation tolerated a range of substitution and was applicable to the synthesis of spirobicyclic compounds and to the cyclization of zeta-alkenyl beta-keto esters.
Palladium-Catalyzed Intramolecular Oxidative Alkylation of 4-Pentenyl ?-Dicarbonyl Compounds
作者:Cong Liu、Xiang Wang、Tao Pei、Ross A. Widenhoefer
DOI:10.1002/chem.200400460
日期:2004.12.17
to good yield as the exclusive cyclized product. Deuterium-labeling experiments provided information regarding the mechanism of the palladium-catalyzed oxidative alkylation of 4-pentenyl beta-dicarbonylcompounds.