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<p>This study describes the applicability of a newly developed <i>Lewis</i> acidic cobalt based catalyst, [(DABCO)₂C₃H₅OH].CoCl₄, in the high-yield synthesis of 2,3-diphenylquinoxalines and triaryl-1<i>H</i>-imidazoles. The catalyst demonstrated exceptional performance under mild conditions, achieving yields of up to 95% with minimal loading (20&#xa0;mg), short reaction durations, and easy product isolation. Notably, it retained high catalytic activity over five consecutive cycles, as supported by post-recovery analyses (FT-IR, <sup>1</sup>HNMR, <sup>13</sup>CNMR, XRD, FESEM, EDX, and TGA). Efficient catalytic performance and other above mentioned advantages makes this system a promising candidate for sustainable heterocyclic synthesis.</p>

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[(DABCO)₂C₃H₅OH].CoCl₄: an efficient and recyclable Lewis acidic catalyst for the solvent-free one-pot synthesis of 2,3-diphenylquinoxalines and triaryl-1H-imidazoles

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Mohammad Ali Frutan,
  • Narges Seyedi,
  • Farhad Shirini

摘要

This study describes the applicability of a newly developed Lewis acidic cobalt based catalyst, [(DABCO)₂C₃H₅OH].CoCl₄, in the high-yield synthesis of 2,3-diphenylquinoxalines and triaryl-1H-imidazoles. The catalyst demonstrated exceptional performance under mild conditions, achieving yields of up to 95% with minimal loading (20 mg), short reaction durations, and easy product isolation. Notably, it retained high catalytic activity over five consecutive cycles, as supported by post-recovery analyses (FT-IR, 1HNMR, 13CNMR, XRD, FESEM, EDX, and TGA). Efficient catalytic performance and other above mentioned advantages makes this system a promising candidate for sustainable heterocyclic synthesis.