Non‐Covalently Immobilized Chiral Imidazolidinone on Sulfated‐Chitin: Reusable Heterogeneous Organocatalysts for Asymmetric Diels‐Alder Reaction

A heterogeneous chiral imidazolodinone catalyst was synthesized by immobilization on a sulfated chitin through non‐covalent ionic interactions. The chitin‐based organocatalyst promoted the asymmetric Diels‐Alder reaction with high enantioselectivity under heterogeneous conditions and was successfully reused multiple times without apparent loss of catalytic activity and enantioselectivity.