Facile synthesis of benzoxazole derivatives by a multi-component reaction catalysed by copper complexes capable of generating phenoxyl radical complex,New Journal of Chemistry

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Facile synthesis of benzoxazole derivatives by a multi-component reaction catalysed by copper complexes capable of generating phenoxyl radical complex
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2023-09-15 , DOI: 10.1039/d3nj03160h
Virendra Kumar Chaudhary ₁ , Sain Singh ₁ , Kapil Kumar ₁ , Angshuman R. Choudhury ₂ , Kaushik Ghosh _{1,

3}

Affiliation

In the present work, mononuclear copper(II) complexes [Cu(L1)Cl](1) and [Cu(L2)Cl](2) having meridional tridentate “NNO” ligands with different substituents have been synthesized and the complexes were characterized by different analytical and spectral techniques, namely FT-IR, NMR, and UV-Vis spectral studies. Molecular structures of complexes 1 and 2 were determined by single-crystal X-ray crystallography. These complexes have been utilized as a catalyst for the synthesis of substituted benzoxazole derivatives under mild conditions. A total of 34 benzoxazole derivatives having different substituents were prepared. The mechanism of this multicomponent reaction, catalysed by complexes 1 and 2, was investigated and the proposed reaction mechanism was based on H-atom abstraction by the phenoxyl radical complex.

中文翻译：

通过能够产生苯氧基自由基络合物的铜络合物催化的多组分反应轻松合成苯并恶唑衍生物

在本工作中，合成了具有不同取代基的子午三齿“NNO”配体的单核铜（ II）配合物[Cu（L1）Cl]（1）和[Cu（L2）Cl]（2 ），并对配合物进行了表征通过不同的分析和光谱技术，即 FT-IR、NMR 和 UV-Vis 光谱研究。通过单晶X射线晶体学测定了配合物1和2的分子结构。这些配合物已被用作在温和条件下合成取代苯并恶唑衍生物的催化剂。共制备了34种具有不同取代基的苯并恶唑衍生物。这种由配合物1催化的多组分反应的机理和2，进行了研究，提出的反应机理是基于苯氧基自由基络合物夺取H原子。

更新日期：2023-09-15

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