Scholarlink

<p>The researchers have actively developed sustainable catalysis processes, placing a strong emphasis on heterogeneous catalysts to reduce the use of toxic solvents and reagents, as well as to mitigate hazardous reactions and streamline time-consuming separations, over the past two decades. Preserving active sites has become a critical focus area during this period. This study centered on synthesizing and evaluating Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>-SD@Pd, assessing its efficacy and reusability. A comprehensive suite of characterization techniques was employed, including FT-IR, TGA, FE-SEM, VSM, TEM, BET, ICP, EDS, mapping, and XRD. The results demonstrate that Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>-SD@Pd is effective for both Isatin Heck, C-H activation, and cycloaddition reactions under moderate conditions, yielding between 78% and 88%. Notably, this catalyst exhibits simultaneous activity in both reactions within a DMF-H₂O solvent mixture at lower temperatures. The mercury poisoning test confirmed that the reaction proceeds via the Pd <sup>(0)</sup>/Pd <sup>(+2)</sup> mechanism. Furthermore, the catalyst is environmentally benign and retains its efficiency over five reuse cycles without significant loss.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Palladium-supported Fe3O4@SiO2 functionalized methyl 2-phenyl thioacetate as a sustainable catalyst for Isatins synthesis

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年5月15日

查看全文
  • Abolfazl Mohammadkhani,
  • Reza Samizad,
  • Akbar Heydari

摘要

The researchers have actively developed sustainable catalysis processes, placing a strong emphasis on heterogeneous catalysts to reduce the use of toxic solvents and reagents, as well as to mitigate hazardous reactions and streamline time-consuming separations, over the past two decades. Preserving active sites has become a critical focus area during this period. This study centered on synthesizing and evaluating Fe3O4@SiO2-SD@Pd, assessing its efficacy and reusability. A comprehensive suite of characterization techniques was employed, including FT-IR, TGA, FE-SEM, VSM, TEM, BET, ICP, EDS, mapping, and XRD. The results demonstrate that Fe3O4@SiO2-SD@Pd is effective for both Isatin Heck, C-H activation, and cycloaddition reactions under moderate conditions, yielding between 78% and 88%. Notably, this catalyst exhibits simultaneous activity in both reactions within a DMF-H₂O solvent mixture at lower temperatures. The mercury poisoning test confirmed that the reaction proceeds via the Pd (0)/Pd (+2) mechanism. Furthermore, the catalyst is environmentally benign and retains its efficiency over five reuse cycles without significant loss.