Immobilized Gelatin–λ–Carrageenan on Magnetite Nanoparticles as an Efficient Organocatalyst for Enantioselective Biginelli Reaction

A facile method for preparation of stabilized and functionalized nanoparticles (NPs) from magnetite by successive application of blended natural polymers (gelatin and λ–carrageenan) on Fe 3 O 4 core has been developed. Gelatin plays a privileged role in the catalytic active sites and it is responsible for the enantiomeric induction. λ–carrageenan endowed chemical stability for immobilization of gelatin on Fe 3 O 4 nanoparticles, thereby...