α,β-Unsaturated ketones were obtained from alkylphenylketene and aroyl chloride via decarbonylation reaction in the presence of catalytic amounts of tetrakis(triphenylphosphine) palladium.
在催化量的四(三苯基膦)钯存在下,通过脱羰反应从烷基苯乙烯酮和芳酰氯获得α,β-不饱和酮。
1,2‐Addition of α,α,α‐Trichlorotoluene to Ketones via a Mg Barbier Reaction in DMF: New Route to Cycloalk‐1‐en‐1‐yl and Alk‐1‐en‐1‐yl Phenyl Ketones
作者:Akima Aaziz、Sylvain Oudeyer、Eric Léonel、Jean Paul Paugam、Jean‐Yves Nédélec
DOI:10.1080/00397910701198971
日期:2007.4.1
Abstract The reductive cyclocondensation of α,α,α‐trichlorotoluene to enolisable ketones enables the preparation of (cyclo)alken‐1‐en‐1‐yl phenyl ketones via the formation of an intermediate chlorooxirane.
Iron‐Catalyzed Oxyphosphorylation of Styrenes to Access <i>β</i>‐Ketophosphonates and <i>α</i>, <i>β</i>‐Unsaturated Ketones
作者:Yukun Zhao、Jingwen Xu、Hongbing Chen、Yi Xia、Lin Hu
DOI:10.1002/adsc.202300733
日期:2023.10.13
developed, which generates a range of previously underexplored α-substituted β-ketophosphonates in 55~70% yields. Furthermore, a convenient one-pot procedure by direct conversion of styrenes to α, β-unsaturatedketones is also developed based on the new catalytic reactions, thus offering a protocol to access two classes of valuable products from simple starting materials.
Copper-Catalyzed Regio- and Stereoselective Intermolecular Three-Component Oxyarylation of Allenes
作者:Taisuke Itoh、Yohei Shimizu、Motomu Kanai
DOI:10.1021/ol501022d
日期:2014.5.16
A copper(II)-catalyzed intermolecular three-component oxyarylation of allenes using arylboronic acids as a carbon source and TEMPO as an oxygen source is described. The reaction proceeded under mild conditions with high regio- and stereo-selectivity and functional group tolerance. A plausible reaction mechanism is proposed, involving carbocupration of allenes, homolysis of the intervening allylcopper(II), and a radical TEMPO trap.
Novel synthesis of .alpha.,.beta.-unsaturated ketones by the palladium-catalyzed arylation of ketenes with aroyl chlorides or the decarbonylative cross-condensation of acyl halides