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    Recent advances in polymer supported palladium complexes as (nano)catalysts for Sonogashira coupling reaction
    (Elsevier, 2020) Nasrollahzadeh, Mahmoud; Motahharifar, Narjes; Ghorbannezhad, Fatemeh; Soheili Bidgoli, Nayyereh Sadat; Baran, Talat; Varma, Rajender S.
    Palladium (Pd) complexes supported on the polymers have been widely used in various organic syntheses endeavors because of their thermal stability, high catalytic activities and recyclability. This article provides contemporary advancements in the deployment of polymer-supported Pd complexes (PSP complexes) in Sonogashira coupling reactions (SCR) of halobenzenes with alkynes. Although most of the reports on SCR are focused on aryl iodides, newer methodologies with supported Pd enable the activation of other aryl halides, especially chlorides, which are discussed in this review.
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    Synthesis of a magnetic polystyrene-supported Cu(II)-containing heterocyclic complex as a magnetically separable and reusable catalyst for the preparation of N-sulfonyl-N-aryl tetrazoles
    (Nature, 2023) Nasrollahzadeh, Mahmoud; Motahharifar, Narjes; Pakzad, Khatereh; Khorsandi, Zahra; Baran, Talat; Wang, Jinghan; Kruppke, Benjamin; Khonakdar, Hossein Ali
    In this work, a cost-effective, environmentally friendly, and convenient method for synthesizing a novel heterogeneous catalyst via modification of polystyrene using tetrazole-copper magnetic complex [Ps@Tet-Cu(II)@Fe3O4] has been successfully developed. The synthesized complex was analyzed using TEM (transmission electron microscopy), HRTEM (high resolution-transmission electron microscopy), STEM (scanning transmission electron microscopy), FFT (Fast Fourier transform), XRD (X-ray diffraction), FT-IR (Fourier transform-infrared spectroscopy), TG/DTG (Thermogravimetry and differential thermogravimetry), ICP-OES (Inductively coupled plasma-optical emission spectrometry), Vibrating sample magnetometer (VSM), EDS (energy dispersive X-ray spectroscopy), and elemental mapping. N-Sulfonyl-N-aryl tetrazoles were synthesized in high yields from N-sulfonyl-N-aryl cyanamides and sodium azide using Ps@Tet-Cu(II)@Fe3O4 nanocatalyst. The Ps@Tet-Cu(II)@Fe3O4 complex can be recycled and reused easily multiple times using an external magnet without significant loss of catalytic activity.