construction of a novel magnetic nanocomposite, and its utility for the fabrication of 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1𝐻-pyrazol-5-ols)

A newly designed magnetic nanocomposite, based on fe3o4@sio2 bonded to an organic component bearing cocl3−, was constructed and comprehensively characterized via elemental mapping, eds, ft-ir, tg, fe-sem, and xrd techniques. subsequently, catalytic performance of the magnetic nanocomposite was examined for the construction of 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1h-pyrazol-5-ols) through the condensation of 1 equiv. of aryl aldehydes with 2 equiv. of 3-methyl-1-phenyl-1h-pyrazol-5(4h)-one; it successfully catalyzed the reaction, with several advantages including elimination of solvents during synthesis, short reaction times (20-30 min) combined with high yields (87-96%), facile purification process, a wide applicability across diverse substrates, and robust catalyst recyclability demonstrated by sustained catalytic performance over three times reuses, along with good eco-compatibility.