unctionalized magnetic nano-CuFe2O4@chitosan as an efficient and recoverable catalyst for Synthesis of 2-Amino-2-Chromenes

Magnetic materials have emerged as a suitable group of heterogeneous catalysts owing to their numerous applications in synthesis and catalysis. To overcome the separation problems of the nanocatalysts, magnetic materials have emerged as recoverable catalysts. Nano-CuFe2O4@chitosan was prepared easily by crosslinking method. The CuFe2O4@chitosan nanoparticles were obtained by crosslinking the amino groups on the chitosan using glutaraldehyde. An efficient and simple threecomponentsynthesis of 2-amino-2-chromenes is described by one-pot condensation of malononitrile, 1,5-naphtalenediol and aromatic aldehydes under reflux conditions and using nano-CuFe2O4@chitosan. This method provides several advantages including mild reaction conditions, applicability to wide range of substrates, reusability of the catalyst and little catalyst loading.

Keywords:

2-Amino-chromenes , Heterogeneous catalyst , Nanoparticle , Chitosan