Platinum(II)/europium(III)-catalyzed intramolecular hydroalkylation of 4-pentenyl β-dicarbonyl compounds
摘要:
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 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.
C-acylation of enolates from lithium dimethylcuprate addition to α,β-unsaturated ketones
作者:S. Bernasconi、P. Gariboldi、G. Jommi、M. Sisti
DOI:10.1016/s0040-4039(00)92600-5
日期:1980.1
The enolatesfrom 1,4 addition of lithium dimethylcuprate to 2-cyclohexenone, 2-cyclopentenone and methyl vinyl ketone, with acetyl chloride, give only C-acylated products and not O-acylated products as previously reported in literature.