Novel biphenyl organocatalysts for iminium ion-catalyzed asymmetric epoxidation

Article abstract of DOI:10.1016/j.tet.2012.10.076

Two novel chiral biphenyl iminium salts derived from L-acetonamine, containing electron-withdrawing 3,30-substituents on the biphenyl unit, have been prepared and tested as asymmetric catalysts for epoxidation of prochiral alkenes. The results are compared with those achieved using the corresponding unsubstituted system.