通过以 O 2作为唯一氧源的电化学瓦克型氧化,开发了一种从三芳基取代的烯烃中有效合成各种 1,2,2-三芳基乙酮的方法。它提出了瓦克型氧化将其底物范围扩展到三取代烯烃的第一个实例。该方法不含过渡金属,与各种官能团相容,并且可以在温和的条件下进行,从而获得令人满意的产率。机械实验表明 C O 键的形成是通过阳离子碳物质和超氧自由基之间的反应发生的,其中涉及富电子取代基的 1,2-位移。
Palladium-Catalyzed Denitrative α-Arylation of Ketones with Nitroarenes
作者:Zhirong Li、Yonggang Peng、Tao Wu
DOI:10.1021/acs.orglett.0c04104
日期:2021.2.5
The palladium-catalyzed α-arylation of ketones with readily available nitroarenes and nitroheteroarenes provides access to useful α-aryl and α-heteroaryl ketones. The use of the Pd/BrettPhos catalysts was critical to achieve high efficiency for these transformations, whereas other catalysts led to decreased yields or no conversions. The intramolecular type substrate was also applied in this methodology
PROCESS FOR CREATING CARBON-CARBON BONDS USING CARBONYL COMPOUNDS
申请人:CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (C.N. R.S.)
公开号:US20150166464A1
公开(公告)日:2015-06-18
The present invention concerns a process for preparing a compound of formula (I) by reaction between a compound of formula (II) and a compound of formula (III) in the presence of a copper-containing catalyst, a ligand and base. The invention also concerns the implementing of this process for the preparation of building blocks to prepare molecules of interest in particular in the pharmaceutical, agro-chemical fields, etc.
No activation needed: The first efficient method for direct α‐arylation of non‐activated or non‐protected family of enolizable ketones with simple aryliodides employs a catalytic copper system. The method shows potential for the easy and step‐economical synthesis of tamoxifen, the most commonly administrated drug for the management of breast cancer. R, R′, R′′ = electron‐donating or electron‐withdrawing