Kinetic Resolution of a Planar–Chiral [2.2]Paracyclophane via Michael Addition to Nitroolefins Catalyzed by N‐Terminal Guanidinylated Helical Peptide
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.
Abstract
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 β-substituted γ-aminobutyric acid.
![Kinetic Resolution of a Planar–Chiral [2.2]Paracyclophane via Michael Addition to Nitroolefins Catalyzed by N‐Terminal Guanidinylated Helical Peptide](/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Fplaceholder.5ca6fc18.png&w=256&q=75)
![Kinetic Resolution of a Planar–Chiral [2.2]Paracyclophane via Michael Addition to Nitroolefins Catalyzed by N‐Terminal Guanidinylated Helical Peptide](/_next/image?url=https%3A%2F%2Fcdn.gdch.de%2Fprod%2Fnadc20264158444_fig_0001_a_36fd5c002c.png&w=256&q=75)
![Kinetic Resolution of a Planar–Chiral [2.2]Paracyclophane via Michael Addition to Nitroolefins Catalyzed by N‐Terminal Guanidinylated Helical Peptide](/_next/image?url=https%3A%2F%2Fcdn.gdch.de%2Fprod%2Fnadc20264158499_fig_0001_a_8463b1bf14.png&w=256&q=75)
![Kinetic Resolution of a Planar–Chiral [2.2]Paracyclophane via Michael Addition to Nitroolefins Catalyzed by N‐Terminal Guanidinylated Helical Peptide](/_next/image?url=https%3A%2F%2Fcdn.gdch.de%2Fprod%2Fnadc20264158504_gra_0001_a_6653df00f8.png&w=256&q=75)
