Cs@Resorcinarene network as an organocatalyst for the three-componentreactions

In recent years, nanoparticles have attracted considerable research interest due to theirpotential applications in catalysis science and technology in alignment with the principles of greenchemistry. One of the green approaches for designing and applying heterogeneous catalyticsystems is the use of biopolymers as appropriate biodegradable catalytic systems or supports. Inthis regard, chitosan and Calix, as economic biopolymers, have received considerable attention tobe used in catalytic systems, as well as drug delivery and adsorbents [۱]. Herein, we report thegreen synthesis magnetic poly calix[۴]resorcinarene of cobalt ferrite by the immobilization ofEDTA and free amines of chitosan as the nucleophilic functional groups that are attacking thecarbonyl in EDTA to form network polymer layer on the magnetic poly calix[۴]resorcinarenesurface. The synthesized compound was used as a magnetic catalyst in the three-componentcondensation reactions of ۲-amino-۴-(۳-nitrophenyl)-۷,۷-dimethyl-۵-oxo-۵,۶,۷,۸-tetrahydro-۴hchromene-۳-carbonyl. Easy separation of catalysts and products, efficiency and proper reactiontime, mild conditions, and reuse are some of the advantages of catalysts used [۲]. In this work, ۲-amino-۴-(۳-nitrophenyl)-۷,۷-dimethyl-۵-oxo-۵,۶,۷,۸-tetrahydro-۴h-chromene-۳-carbonyl ۴ via athree-component condensation of aromatic aldehydes, malononitrile, and dimedone weresynthesized in the presence of CS@Resorcinarene catalyst under optimal conditions with excellentefficiency. The resulting nanocomposite was studied by EDX, FESEM, and FT-IR techniques

کلیدواژه ها:

Magnetic Nanoparticles ، Catalyst ، Chitosan