据报道,硫酸氧钒 (IV) 促进了醛的 C-H 键酯化,V IV OSO 4。该过程以可见光为媒介,在室温下进行,没有添加剂,使用 H 2 O 2作为良性氧化剂。VOSO 4是一种市售的地球储量丰富的金属 (EAM s ) 盐,无需制备。该报告为钒盐在卤化过程以及 C−H 活化中的扩展应用开辟了有趣的视角,并在地球丰富的金属基催化领域做出了贡献。
Ligand-Free Palladium-Catalyzed Hydroxycarbonylation of Aryl Halides under Ambient Conditions: Synthesis of Aromatic Carboxylic Acids and Aromatic Esters
作者:Wei Han、Fengli Jin、Qing Zhou
DOI:10.1055/s-0034-1380497
日期:——
halides. Arylhalides were readily converted into their corresponding aromatic carboxylic acids in high yields with high selectivity by ligand-free palladium-catalyzed hydroxycarbonylation at room temperature and atmospheric pressure. The new method is operationally simple and scalable. In addition, aromatic esters were easily synthesized through one-pot hydroxycarbonylation/alkylation with alkyl halides
Pd‐Catalysed Decarbonylation Free Approach to Carbonylative Esterification of 5‐HMF to Its Aryl Esters Synthesis Using Aryl Halides and Oxalic Acid as C
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作者:Arvind Singh Chauhan、Ajay Kumar、Ajay Kumar Sharma、Pralay Das
DOI:10.1002/chem.202101827
日期:2021.9.9
(Pd@PS)-catalysed carbonylative esterification of the hydroxy group of 5-hydroxymethyl furfural (5-HMF) to its corresponding aryl esters has been developed. The use of Pd@PS, oxalic acid as CO source, and aryl halides was first explored for the aryl ester of 5-HMF synthesis. Here, we investigated the vital role of a polystyrene support to avoid the commonly known decarbonylation of 5-HMF. The reaction
Rhodium-catalyzed synthesis of esters from aryl iodides and alcohols: use of alcohols with/without the assistance of aldehydes as carbon monoxide and nucleophile sources
作者:Ju Hyun Kim、Hawon Park、Young Keun Chung
DOI:10.1039/c6ra25723b
日期:——
A CO-gas-free rhodium-catalyzed alkoxycarbonylation of aryl iodide with alcohols has been developed. Alcohols, with/without the aid of an aldehyde, were used as a carbon monoxide and nucleophile source. The former synthesis afforded better yields of the alkoxycarbonylated products. Moreover, phenols also afforded phenoxycarbonylation products with high yields.