A convenient method for the synthesis of 3-aryl isoindolinones via TfOH catalyzed C–H functionalization of arenes with 2-formylbenzonitriles is developed.
The γ C–H amination of carboxylic acid presents a promising and sustainable strategy for synthesizing high-value pharmaceutical chemicals. Radical reaction pathways initiated by aroyloxy radical-involved hydrogen atom transfer (HAT) provide diverse but challenging opportunities for remote C–H functionalization. In this report, the first example of intramolecular γ C–H amination of carboxylic acids
Isoindolinones via Copper-Catalyzed Intramolecular Benzylic C–H Sulfamidation
作者:Robin B. Bedford、John G. Bowen、Carolina Méndez-Gálvez
DOI:10.1021/acs.joc.6b02970
日期:2017.2.3
2-Benzyl-N-tosylbenzamides and related substrates undergo copper-catalyzed intramolecular sulfamidation at the benzylic methylene to give N-arylsuflonyl-1-arylisoindolinones, which can be N-deprotected using samarium iodide to generate the free 1-arylisoindolinones. Preliminary mechanistic studies indicate that the rate-determining step is not C-H bond cleavage but are instead consistent with slow oxidation of a copper pi-arene intermediate.