Journal of the American Chemical Society, Vol.131, No.41, 14626-14626, 2009
Organocatalytic Asymmetric Vinylogous alpha-Ketol Rearrangement: Enantioselective Construction of Chiral All-Carbon Quaternary Stereocenters in Spirocyclic Diketones via Semipinacol-Type 1,2-Carbon Migration
The catalytic enantioselective synthesis of all-carbon quaternary stereogenic centers in spirocyclic diketones has been achieved for the first time by an unprecedented asymmetric vinylogous alpha-ketol rearrangement in which an enantiocontrotled semipinacol-type 1,2-carbon migration was realized using multifunctional cinchona-modified primary amine catalysis.