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Kajtár M, Király SB, Bényei A, Kiss-Szikszai A, Kónya-Ábrahám A, Zhang N, Horváth LB, Bősze S, Li D, Kotschy A, Paczal A, Kurtán T. Competing Domino Knoevenagel-Cyclization Sequences with N-Arylcinnamylamines. J Org Chem 2024; 89:6937-6950. [PMID: 38691817 DOI: 10.1021/acs.joc.4c00299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Domino Knoevenagel-cyclization reactions of N-arylcinnamylamines were carried out with active methylene reagents, which took place with five competing cyclization mechanisms: intramolecular hetero Diels-Alder reaction, stepwise polar [2 + 2] cycloaddition, styryl or aza-Diels-Alder reactions followed by rearomatization, and [1,5]-hydride shift-6-endo cyclization. In the stepwise aza-Diels-Alder reaction, the N-vinylpyridinium moiety acted as an azadiene, producing a condensed heterocycle with tetrahydroquinolizinium and tetrahydroquiniline subunits. Antiproliferative activity with low micromolar IC50 values was identified for some of the novel scaffolds.
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Affiliation(s)
- Mihály Kajtár
- Department of Organic Chemistry, University of Debrecen, Debrecen 4002, Hungary
- Doctoral School of Chemistry, University of Debrecen, Egyetem square 1, 4032 Debrecen, Hungary
| | | | - Attila Bényei
- Department of Physical Chemistry, University of Debrecen, Debrecen 4002, Hungary
| | | | - Anita Kónya-Ábrahám
- Department of Organic Chemistry, University of Debrecen, Debrecen 4002, Hungary
| | - Ning Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Lilla Borbála Horváth
- Hungarian Research Network (HUN-REN), Research Group of Peptide Chemistry, Eötvös Loránd University, H1117 Budapest, Hungary
| | - Szilvia Bősze
- Hungarian Research Network (HUN-REN), Research Group of Peptide Chemistry, Eötvös Loránd University, H1117 Budapest, Hungary
| | - Dehai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Andras Kotschy
- Servier Research Institute of Medicinal Chemistry, Budapest 1031, Hungary
| | - Attila Paczal
- Servier Research Institute of Medicinal Chemistry, Budapest 1031, Hungary
| | - Tibor Kurtán
- Department of Organic Chemistry, University of Debrecen, Debrecen 4002, Hungary
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Wang K, Du X, Zhang P, Wei Z, Cao XT. Metal-free C-3 selective C(sp 2)-C(sp 3) heteroarylation of anilines with imidazo[1,2- a]pyridine derivatives via cross-dehydrogenative coupling. RSC Adv 2023; 13:21685-21689. [PMID: 37476046 PMCID: PMC10355276 DOI: 10.1039/d3ra03852a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 07/09/2023] [Indexed: 07/22/2023] Open
Abstract
A general and straightforward method for the regioselective construction of C-3 heteroaryl-containing imidazo[1,2-a]pyridines via cross-dehydrogenative coupling under transition-metal-free conditions has been reported, utilizing N,N-dimethylaniline as the methylenation source and furnishing the C(sp2)-C(sp3) functionalized products in good to excellent yields. Mechanism studies indicate that a radical pathway is responsible for this transformation.
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Affiliation(s)
- Kai Wang
- College of Medical Engineering & the Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
| | - Xiaoxue Du
- College of Medical Engineering & the Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
| | - Pengfei Zhang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University Hangzhou 311121 China
| | - Zhenjiang Wei
- Department of Pharmaceutical Engineering, Shandong Medicine Technician College Taian 271016 China
| | - Xian-Ting Cao
- College of Medical Engineering & the Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
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Lee S, Lee J, Kim JN. Synthesis of five‐ring‐fused azepinone derivatives from bis‐isatins via sequential 6π‐electrocyclic ring closure, ring expansion, and dehydrogenation process. B KOREAN CHEM SOC 2023. [DOI: 10.1002/bkcs.12672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Sangku Lee
- Anticancer Agent Research Center, KRIBB, Cheongju Chungbuk Republic of Korea
| | - Junseong Lee
- Department of Chemistry Chonnam National University Gwangju Republic of Korea
| | - Jae Nyoung Kim
- Department of Chemistry Chonnam National University Gwangju Republic of Korea
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Cao X, Zheng Z, Liu J, Hu Y, Yu H, Cai S, Wang G. H
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‐Mediated Synthesis of 1,2,4‐Thiadiazole Derivatives in Ethanol at Room Temperature. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Xian‐Ting Cao
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Zuo‐Ling Zheng
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Jie Liu
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Yu‐He Hu
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Hao‐Yun Yu
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Shasha Cai
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Guannan Wang
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
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