Synthesis 2024; 56(23): 3680-3686
DOI: 10.1055/a-2417-9450
paper

Efficient and Direct Route to 5-Iodo-4H-Quinoxalines via Copper-Catalyzed Double C–N Arylations of 1,2,3-Triiodoarenes: Potential Application towards 5-Substituted 4H-Quinoxalines

Authors

  • Raed M. Al-Zoubi

    a   Department of Biomedical Sciences, QU-Health, College of Health Sciences, Qatar University, Doha, 2713, Qatar
    b   Surgical Research Section, Department of Surgery, Hamad Medical Corporation, Doha, Qatar
    c   Department of Chemistry, College of Science and Art, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan
  • Walid K. Al-Jammal

    a   Department of Biomedical Sciences, QU-Health, College of Health Sciences, Qatar University, Doha, 2713, Qatar
  • Mohanad Shkoor

    d   Department of Chemistry and Earth Sciences, College of Arts and Science, Qatar University, P.O. Box 2713, Doha, Qatar
  • Abdulilah D. Bani-Yaseen

    d   Department of Chemistry and Earth Sciences, College of Arts and Science, Qatar University, P.O. Box 2713, Doha, Qatar
  • Michael J. Ferguson

    e   Department of Chemistry, Gunning-Lemieux Chemistry Centre, University of Alberta, Edmonton, Alberta, T6G2G2, Canada

The Deanship of Research at the Jordan University of Science and Technology (JUST) has provided funding for this project (Grant No. 100/2018 for R.M.A.).


Graphical Abstract

Preview

Abstract

A simple, direct, and regioselective protocol to substituted 5-iodo-4H-quinoxalines through double C–N arylations of 1,2,3-triiodobenzenes and 1,2-diamines is reported. Remarkably, the N-arylation couplings proceed unimolecularly at the vicinal positions, the most active and less hindered positions. This process tolerates a wide range of aromatic substrates. The reactions of electron-deficient 1,2,3-triiodoarene systems and DMEDA under the optimized conditions provided the highest isolated yields. The chemical transformation of the target compound, which serves as a valuable precursor in synthesis, was successfully demonstrated in the Suzuki–Miyaura reaction, giving the desired coupling derivatives with excellent isolated yields. This article describes a method for the first and unprecedented synthesis of 5-iodo-4H-quinoxalines that is regioselective, scalable, and provides useful derivatives for other chemical reactions

Supporting Information



Publication History

Received: 22 June 2024

Accepted after revision: 18 September 2024

Accepted Manuscript online:
18 September 2024

Article published online:
15 October 2024

© 2024. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany