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

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
,
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
› Institutsangaben
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.).


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



Publikationsverlauf

Eingereicht: 22. Juni 2024

Angenommen nach Revision: 18. September 2024

Accepted Manuscript online:
18. September 2024

Artikel online veröffentlicht:
15. Oktober 2024

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