رحمان کریمی نامی

In this paper, a facile and efficient method for the synthesis of 2H-indazolo[2,1-b]phthalazine-triones based on the acid-catalyzed multicomponent reaction of dimedone, hydrazine, and phthalic anhydride with aldehydes reported in the presence of Fe3O4/eggshell/CS@HSO4 in solvent-free. We have synthesized a new nanocomposite material in which eggshell membranes act as nucleation sites for the precipitation of Fe3O4/eggshell/CS@HSO4 nanoparticles in the attendance of an external magnetic field. In the next step anchoring a chlorosulfonic acid on the surface of eggshell‐coated magnetic nanoparticles as solid waste was transformed into a magnetic biomaterial, green, cheap, and environmentally friendly catalyst (Fe3O4/eggshell/CS@HSO4). Techniques such as FT-IR, VSM, FESEM, TEM, EDX, XRD, and TGA characterized the as-synthesized catalyst. The catalytic property of the as-prepared catalyst was examined in synthesizing 2H-indazolo[2,1-b]phthalazine-triones