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
Acetophenone and deoxybenzoin derivatives are selectively α‐arylated using a combination of very small amounts of palladium acetate and diphenylphosphine oxide as catalyst system and water as the only solvent. Target di‐ and triarylethanones are isolated virtually free of metal residues, and the reaction is amenable to gram‐scale. A mechanistic proposal based on TEM images, poisoning experiments, kinetic