Pd (II) complexes bearing “SNS” pincer‐type thioether ligands: Application as catalysts in the synthesis of vitamin K
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作者:Hatice Gamze Sogukomerogullari、Tugba Taskin Tok、Serhan Uruş、Mehmet Sönmez
DOI:10.1002/aoc.6467
日期:2022.1
pincer-type thioether containing Pd (II) complexes were synthesized and characterized by using FT-IR, UV-Vis, mass, elemental analysis techniques. The complexes were used as catalysts in the synthesis of vitamin K3 (2-methyl-1,4-naphthoquinone) from 2-methyl naphthalene. Hydrogen peroxide was used as green oxidant in acetic acid and sulfuric acid medium. L2-Pd (II) and L3-Pd (II) complexes showed the
采用FT-IR、UV-Vis、质量、元素分析技术合成了新型的四种SNS钳型硫醚Pd(II)配合物并对其进行了表征。该配合物用作合成维生素 K 3的催化剂(2-methyl-1,4-naphthoquinone) 来自 2-甲基萘。过氧化氢在醋酸和硫酸介质中用作绿色氧化剂。L2-Pd(II)和L3-Pd(II)配合物表现出最好的催化活性,选择性分别为62.63%和61.05%,转化率分别为82.61%和87.84%。此外,对 Pd (II) 配合物的计算机研究表明,L2-Pd (II) 和 L3-Pd (II) 配合物在 LUMO 和 HOMO 能级之间具有低带隙,并且它们的静电能值高于其他复杂结构。这表明它们比其他配合物具有更好的化学活性,也支持了本研究中进行的实验研究。与文献相比,这些配合物的转化率和选择性是最好的之一。