Palladium(II)-Catalyzed Desulfitative Synthesis of Aryl Ketones from Sodium Arylsulfinates and Nitriles: Scope, Limitations, and Mechanistic Studies
作者:Bobo Skillinghaug、Christian Sköld、Jonas Rydfjord、Fredrik Svensson、Malte Behrends、Jonas Sävmarker、Per J. R. Sjöberg、Mats Larhed
DOI:10.1021/jo501875n
日期:2014.12.19
The desulfitative synthesis of aryl ketones from nitriles was also compared to the corresponding transformation starting from benzoic acids. Comparison of the energy profiles indicates that the free energy requirement for decarboxylation of 2,6-dimethoxybenzoic acid and especially benzoic acid is higher than the corresponding desulfitative process for generating the key aryl palladium intermediate. The
A cobalt-catalyzed C(sp3)–H oxygenation reaction to furnish aldehyde was herein reported. This transformation demonstrated high chemo-selectivity, and tolerated various methylarenes bearing electron-withdrawing substituents. This reaction provided rapid access to diverse aldehydes form methylarenes. Notably, TFA/TFAA was used for the first time as a mixed solvent in cobalt-catalyzed oxygenation of
Ligand‐free Palladium‐Catalyzed Carbonylative Suzuki Coupling of Aryl Iodides in Aqueous CH
<sub>3</sub>
CN with Sub‐stoichiometric Amount of Mo(CO)
<sub>6</sub>
as CO Source
作者:Nan Sun、Qingxia Sun、Wei Zhao、Liqun Jin、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.1002/adsc.201900011
日期:2019.4.23
established based on the palladium‐catalyzed carbonylative Suzuki coupling approach with sub‐stoichiometric Mo(CO)6 as CO source. Using 0.5 mol% of Pd(TFA)2 as catalyst, 0.5 equivalent of Mo(CO)6 as solid carbonyl reagent and 3 equivalent of K3PO4 as base, a wide range of functionalized (hetero)aryl iodides and (hetero)aryl boronic acids could smoothly proceed the carbonylative cross‐coupling reaction in aqueous
基于亚化学计量的Mo(CO)6作为CO源的钯催化羰基化Suzuki偶联方法,已经建立了一种合成二芳基和杂二芳基酮的新方法。使用0.5摩尔%的Pd(TFA)2作为催化剂,0.5当量的Mo(CO)6作为固体羰基试剂和3当量的K 3 PO 4作为碱,各种官能化的(杂)芳基碘和(杂)芳基硼酸可以在50°C的CH 3 CN水溶液中平稳地进行羰基交叉偶联反应,从而提供相应的酮,收率非常好。新开发的方法易于在温和条件下高效地操作。
General and Greener Route to Ketones by Palladium-Catalyzed Direct Conversion of Carboxylic Acids with Organoboronic Acids
Cross-coupling reaction of carboxylic acids with organoboron compounds catalyzed by palladium complexes in the presence of an activator such as dimethyl dicarbonate under mild conditions gives ketones in excellent yields except for certain substrates.
Various carboxylic acids are catalytically converted into ketones on treatment with organoboron compounds in the presence of activators and palladium catalysts. Detailed examination of factors infl...