Kinetic Resolution of a Planar-Chiral [2.2]Paracyclophane via Michael Addition to Nitroolefins Catalyzed by N-Terminal Guanidinylated Helical Peptide

Kinetic resolution of 4-(2-nitrovinyl)[2.2]paracyclophane based on N-terminal-guanidinylated resin-bound helical peptide catalyzed asymmetric Michael addition of malonate esters was developed. This approach provides a new pathway to enantiopure paracyclophane derivatives characterized by both planar and central chirality, along with the recovery of the chiral substrate with a selectivity factor of up to 111. Additionally, the synthetic potential of the resulting products has been showcased through their successful transformation into derivatives of beta-substituted gamma-aminobutyric acid. N-terminal guanidinylated resin-supported helical peptides were found to catalyze the kinetic resolution of a planarly chiral 4-(2-nitrovinyl)[2.2] paracyclophane via asymmetric Michael addition with an s-factor reaching up to 111. image