A Cooperative Participation of the Amido Group in the Organocatalytic Construction of All-Carbon Quaternary Stereocenters by Michael Addition with β-Ketoamides
作者:Maria del Mar Sanchez Duque、Olivier Baslé、Nicolas Isambert、Anouk Gaudel-Siri、Yves Génisson、Jean-Christophe Plaquevent、Jean Rodriguez、Thierry Constantieux
DOI:10.1021/ol200924e
日期:2011.7.1
The secondary amido group of a-substituted beta-ketoamides plays a crucial role in the control of the reactivity and spatial arrangement (selectivity) in the organocatalyzed Michael addition to unsaturated carbonyls. This results in an unprecedented activation mode of substrates through H-bonding interactions allowing the construction of enantiomerically enriched functionalized all-carbon quaternary centers and spiroaminals of high synthetic potential.