Direct esterification of carboxylicacids with arylboronic acids has been successfully developed employing methyl propiolate as an activating reagent. This transformation was performed through a process of enol ester intermediate‐induced metal‐free oxidative coupling. Metal‐free, simple operation, good functional group tolerance, all of these indicate that this method is an adoptable approach for the
[EN] TRICYCLIC PYRAZOLE KINASE INHIBITORS<br/>[FR] INHIBITEURS DE KINASES A BASE DE TYRAZOLES TRICYCLIQUES
申请人:ABBOTT LAB
公开号:WO2005095387A1
公开(公告)日:2005-10-13
Compounds of the present invention are useful for inhibiting protein tyrosine kinases. Also disclosed are methods of making the compounds, compositions containing the compounds, and methods of treatment using the compounds.
The palladium-catalyzed carbonylation of diaryliodonium tetrafluoroborates and tosylates (toluene-p-sulfonates) in the presence of methanol and phenol afforded aromatic esters at room temperature under one atmosphere of carbon monoxide. However, carbonylation of diaryliodonium triflates and bromides in methanol afforded 4-iodophenyl-substituted methyl esters.
Arylformates are efficient carbonmonoxide sources in palladium-catalyzed esterification of aryl halides. The carbonylation readily proceeds at ambient pressure without the use of externalcarbonmonoxide to afford the corresponding esters in high yields.
Transition‐Metal‐Free DMAP‐Mediated Aromatic Esterification of Amides with Organoboronic Acids
作者:Tao Wang、Yanqing Wang、Kai Xu、Yuheng Zhang、Jiarui Guo、Lantao Liu
DOI:10.1002/ejoc.202100478
日期:2021.6.14
A new, transition-metal-free, effective method for aromatic esterification of amides with organoboronic acids has been developed, leading to a wide range of benzoate derivatives with yields ranging from moderate to good. The catalytic reaction shows broad substrate scope and excellent functional group tolerance.