In situ generated aza-π-allylpalladium zwitterions as nucleophilic triggers for enantioselective [4 + 2] cycloaddition with electron-deficient alkenes toward functionalized chiral piperidines

Aza-π-allylpalladium zwitterions, in situ generated from Pd-catalyzed decarboxylation of methylene cyclic carbamates, have so far been reported only as electrophilic triggers for promoting various asymmetric reactions. Herein, for the first...