Palladium-catalyzed carbonylative addition of aryl bromides to arylalkynes: a simple and efficient method for chalcone synthesis
作者:Sheng Zhang、Liangguang Wang、Xiujuan Feng、Ming Bao
DOI:10.1039/c4ob01263a
日期:——
Palladium-catalyzedcarbonylative addition of arylbromides to terminal arylalkynes was carried out to produce chalcones in satisfactory to excellent yields. The unprecedented carbonylation reaction proceeded smoothly under mild conditions in the presence of a simple palladium catalyst system (PdCl2/DPPB/iPr2NEt) in N,N-dimethyl formamide.
进行了钯催化的芳基溴化物羰基加成到末端芳基炔烃上,以令人满意的产率获得了查耳酮。在N,N-二甲基甲酰胺中存在简单的钯催化剂体系(PdCl 2 / DPPB / i Pr 2 NEt)的情况下,在温和条件下,史无前例的羰基化反应顺利进行。
Synthetic and Mechanistic Studies on the Solvent-Dependent Copper-Catalyzed Formation of Indolizines and Chalcones
作者:María José Albaladejo、Francisco Alonso、María José González-Soria
DOI:10.1021/acscatal.5b00417
日期:2015.6.5
formation from aldehydes and alkynes, a new reaction pathway involving propargyl amines as intermediates that do not undergo rearrangement is presented. The formation of indolizines or chalcones is driven by inductive and solvent effects, with a wide array of both being reported. In both reactions, the nanoparticulate catalyst has been shown to be superior to some commercially available copper catalysts
Carbonylative Suzuki Couplings of Aryl Bromides with Boronic Acid Derivatives under Base-Free Conditions
作者:Klaus M. Bjerglund、Troels Skrydstrup、Gary A. Molander
DOI:10.1021/ol5003362
日期:2014.4.4
The carbonylative Suzuki-Miyaura reaction between aryl bromides and arylboronic acid equivalents is herein reported, using base-free conditions and a limited excess of carbon monoxide generated ex situ from stable CO. precursors. Under these conditions, unsymmetrical biaryl ketones were obtained in modest to excellent yields. This method was adapted to the synthesis of the triglyceride and cholesterol regulator drug, fenofibrate, and its C-13-labeled derivative in good yields from the appropriate CO-precursor.
Synthesis of Ketones by C−H Functionalization of Aldehydes with Boronic Acids under Transition‐Metal‐Free Conditions
作者:Silvia Roscales、Aurelio G. Csáky
DOI:10.1002/anie.202015835
日期:2021.4.12
A method for the synthesis of ketones from aldehydes and boronic acids via a transition‐metal‐free C−H functionalization reaction is reported. The method employs nitrosobenzene as a reagent to drive the simultaneous activation of the boronic acid as a boronate and the activation of the C−Hbond of the aldehyde as an iminium species that triggers the key C−C bond‐forming step via an intramolecular migration