An efficient Iodine Catalyzed Microwave Assisted One-Pot Multicomponent Synthesis of 5-amino-1, 3-diphenyl-1H-pyrazole4-carbonitrile and its derivatives.

The development of eco-friendly, time-efficient, and high-yielding synthetic methodologies for heterocyclic scaffolds remains a central focus in modern organic chemistry. In this study, we report an efficient iodine-catalyzed, microwave-assisted one-pot multicomponent protocol for the synthesis of amino pyrazoles and their derivatives. The synergistic effect of iodine catalysis and microwave irradiation significantly enhances reaction rates, minimizes by-product formation, and affords the desired amino pyrazoles in excellent yields within short reaction times. The operational simplicity, environmental benignity, and atom-economy of the method highlight its superiority over conventional protocols. Structural elucidation of the synthesized derivatives was achieved through spectral (FT-IR, 1H NMR, 13C NMR, and Mass) analyses. Furthermore, the synthesized compounds, bearing diverse functional substitutions, demonstrate promising potential for biological applications, as pyrazole-based frameworks are well-documented for their antioxidant activity.