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-catalyzed coupling 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.
新戊酸或溴化铜的共催化作用使大量的芳基,噻吩基和吡啶基卤化物与环状硝酮(包括DMPO)非常快速,清洁和高产率地由钯催化偶联。介绍了反应条件,范围和机理的研究。应用于手性硝酮MiPNO,这种转化可以直接获得对映纯α-甲基α-芳基甘氨酸酯。