Platinum(II)/europium(III)-catalyzed intramolecular hydroalkylation of 4-pentenyl β-dicarbonyl compounds
作者:Cong Liu、Ross A. Widenhoefer
DOI:10.1016/j.tetlet.2004.11.060
日期:2005.1
Reaction of 5,5-dimethyl-8-nonene-2,4-dione with a catalytic mixture of (PtCL2(CH2=CH2)](2) (2) (1 mol%). and EuCl3, (2 mol%) in dioxane that contained HC1 (l.0equiv) at 90degreesC for 18h led to the isolation of 2-acetyl-3.6.6-trimethyl-2 -cyclohexanone in 85% yield. A number of 4-pentenyl beta-dicarbonyl compounds underwent intramolecular hydroalkylation to form Cyclohexanones in moderate to excellent yield. (C) 2004 Elsevier Ltd. All rights reserved.
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.