In presented research, the preparation and characterization of a magnetic chitosan support and immobilization process of palladium nanoparticles on its surface were reported. Then, the catalytic activity of prepared nanocomposite was investigated in the cross-coupling reaction of acyl chlorides with phenyl acetylene for the synthesis of α,β-ynones and also coupling reaction of acyl chlorides with aryl boronic acids for the preparation of diaryl ketones. 2,3-Dialdehyde starch was prepared by periodate oxidation of starch biopolymer and used as covalent linking agent for the reaction with amine groups of chitosan chains to increase its stability. The formed Schiff bases in this hybrid polymer were reduced by NaBH₄. Then, the magnetic biosupport was achieved through the reaction of iron oxide nanoparticles with hydroxyl groups of oxidized starch–chitosan hybrid. This magnetic biopolymer was used as excellent stabilizer and biosupport for the immobilization of palladium nanoparticles through the addition of ethanolic solution of palladium chloride in the absence of any external reducing agent.

在目前的研究中，报道了磁性壳聚糖载体的制备和表征以及钯纳米颗粒在其表面的固定过程。然后，研究了制备的纳米复合材料在酰氯与苯乙炔交叉偶联反应合成α,β-炔酮以及酰氯与芳基硼酸偶联反应制备二芳基酮的催化活性。2,3-二醛淀粉是通过淀粉生物聚合物的高碘酸盐氧化制备的，并用作共价连接剂与壳聚糖链的胺基反应以增加其稳定性。这种杂化聚合物中形成的席夫碱被 NaBH ₄还原. 然后，通过氧化铁纳米颗粒与氧化淀粉-壳聚糖杂化物的羟基反应获得磁性生物载体。这种磁性生物聚合物被用作优异的稳定剂和生物载体，通过在没有任何外部还原剂的情况下添加氯化钯的乙醇溶液来固定钯纳米颗粒。