Fast Pd- and Pd/Cu-Catalyzed Direct C–H Arylation of Cyclic Nitrones. Application to the Synthesis of Enantiopure Quaternary α-Amino Esters
作者:Emilien Demory、Daniel Farran、Benoit Baptiste、Pierre Y. Chavant、Véronique Blandin
DOI:10.1021/jo301114k
日期:2012.9.21
very fast, clean, and high-yielding palladium-catalyzedcoupling of a large array of aryl, thienyl, and pyridyl halides with cyclic nitrones, including DMPO. The study of the reaction conditions, scope, and mechanism is presented. Applied to the chiral nitrone MiPNO, this transformation provides a straightforward access to enantiopure α-methyl α-arylglycine esters.
Imidazolidinone Nitroxides as Catalysts in the Aerobic Oxidation of Alcohols, en Route to Atroposelective Oxidative Desymmetrization
作者:Marta Carbó López、Guy Royal、Christian Philouze、Pierre Y. Chavant、Véronique Blandin
DOI:10.1002/ejoc.201402324
日期:2014.8
co-catalytic system. In some cases, rapid oxidation to benzaldehyde was accomplished at room temperature under an atmospheric O2 pressure. Moreover, atroposelectivedesymmetrization was achieved during the aerobicoxidation of a diol catalyzed by an enantiopure imidazolidinonenitroxide. Finally, the electrochemical behavior of the new hydroxylamines and nitroxides was investigated by cyclic voltammetry