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A Novel Sulfamic Acid Functionalized Nano-Catalyst on the Basis of Calix[4]Resorcinarene for the Green One-Pot Synthesis of 2H-Indazolo[2,1-B]Phthalazine-Triones Under Thermal Solvent-Free Conditions Publisher



Mouradzadegun A1, 2 ; Mostafavi MA1 ; Ganjali MR2, 3
Authors

Source: Reaction Kinetics# Mechanisms and Catalysis Published:2018


Abstract

N-propyl sulfamic acid supported nano-catalyst on the basis of calix[4]resorcinarene was prepared via the efficient and facile reaction of amine functionalized polycalix[4]resorcinarene with chlorosulfonic acid. The achieved catalytic system was characterized using some spectroscopic techniques such as Fourier transform Infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and CHNS elemental analysis. This newly developed acidic catalyst was employed efficiently in a one-pot three-component condensation reaction of aromatic aldehydes, dimedone and phthalhydrazide for the synthesis of 2H-indazolo[2,1-b]phthalazine-trione derivatives through an easy and eco-friendly methodology. The catalyst was easily separated from the reaction mixture by simple filtration and the desired products were achieved in good to excellent yields in short reaction times. © 2018, Akademiai Kiado, Budapest, Hungary.