Pd(II)-Catalyzed Direct <i>ortho</i>-C–H Acylation of Aromatic Ketones by Oxidative Decarboxylation of α-Oxocarboxylic Acids
作者:Pui-Yiu Lee、Peiwen Liang、Wing-Yiu Yu
DOI:10.1021/acs.orglett.7b00677
日期:2017.4.21
A Pd-catalyzed decarboxylative acylation of aromaticketones with α-oxocarboxylic acids was developed, and 1,2-diacylbenzenes were formed in up to 90% yield with excellent ortho-selectivity. This work demonstrates the first successful attempt to direct C–H acylation of aromaticketones without the need for prederivatization to imines. The acylation reaction was inhibited by radical scavengers such
One-Pot Transformation of Aldehydes to Ketones via Minisci-Type Reaction of Imines
作者:Zakhar M. Rubanov、Vitalij V. Levin、Alexander D. Dilman
DOI:10.1021/acs.orglett.3c03764
日期:2023.12.8
A method for the conversion of aldehydes to ketones via the preliminary formation of aldiminines is described. The imines are involved in acid promoted Minisci-type reaction with alkyl radicals generated fromesters of N-hydroxylphthalimide under photoredox conditions. Aminyl radical cations formed after the addition of the iminium ions are believed to be key intermediates, which determine the reaction
Catalyst-free alkanoylation of aromatic rings via arylstannanes. Scope and limitations
作者:Marcos J. Lo Fiego、María T. Lockhart、Alicia B. Chopa
DOI:10.1016/j.jorganchem.2009.07.019
日期:2009.10
The reaction of alkanoyl chlorides with arylstannanes in 1,2-dichlorobenzene (180 degrees C) is a simple and direct route for the catalyst-free and regioselective synthesis of tertiary alkyl aryl ketones in good to excellent isolated yields (55-77%). Nevertheless, under similar conditions, reactions carried out with alkanoyl chlorides bearing alpha-hydrogens render only the product of protodestannylation. (C) 2009 Elsevier B. V. All rights reserved.
Adamantylzinc Bromides: Direct Preparation and Application to Cross-Coupling Reaction