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In present study, magnetically separable cobalt ferrite nanoparticles (CoFe2O4·NPs) have been prepared by low cost chemical precipitation method and reported as reusable, proficient heterogeneous catalyst for the synthesis of 1-oxo-hexahydroxanthenes among other ferrites. The structural and morphological studies by X-ray diffraction and scanning electron microscopy confirmed the formation of CoFe2O4 nanoparticles. The current protocol evaluated a proficient catalyst for reaction between various salicylaldehydes and 1,3-diketones. The ambient reaction conditions, shorter reaction time, good to excellent yields of the products, ease of purification of the products and reusa-bility of catalyst up to five catalytic cycles without significant loss of catalytic activity making the current protocol promising for its practical application.

Novel synthesis of 1,3,5‐trisubstituted‐2‐pyrazoline and its derivatives, showing broad spectrum of biological activities in wide range of scientific disciplines is designed via condensation of substituted chalcones and aryl hydrazine in presence of the magnetically separable cobalt ferrite nanoparticles (CoFe2O4 MNPs) to get aimed product with excellent yield in possibly shorter reaction time. Divers structural, morphological, and spectral analytical studies as X‐ray diffraction (XRD), scanning electron microscopy (SEM), and FTIR confirm the formation of CoFe2O4 nanoparticles. The synthesized compounds are characterized and confirmed by spectral analysis. The ambient reaction conditions, ease of purification of the products, and reusability of the catalyst up to five catalytic cycles with almost negligible decrement of catalytic activity making the current protocol benign and promising for its synthetic applications.