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Batizi B, Pollák P, Dancsó A, Keglevich P, Simig G, Volk B, Milen M. Studies on the syntheses of β-carboline alkaloids brevicarine and brevicolline. Beilstein J Org Chem 2025; 21:955-963. [PMID: 40438304 PMCID: PMC12117210 DOI: 10.3762/bjoc.21.79] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2025] [Accepted: 05/06/2025] [Indexed: 06/01/2025] Open
Abstract
A new total synthesis of the β-carboline alkaloid brevicarine is disclosed. The synthesis was carried out starting from an aromatic triflate key intermediate, allowing the introduction of various substituents into position 4 of β-carboline by cross-coupling reactions. Thanks to its scalability, this novel approach ensures a broad accessibility to the target compound for potential pharmacological measurements. Using detailed NMR studies, the NMR signals have been assigned for both the base and its dihydrochloride salt for further confirming their structures. A new synthesis of the related alkaloid brevicolline was also attempted from the same intermediate. However, after successful coupling of β-carboline with N-methylpyrrole, the trials to saturate the pyrrole ring under various conditions led to unexpected reactions: reduction of ring A of the β-carboline skeleton or trifluoroethylation of the pyrrole moiety occurred, leading to interesting and potentially useful derivatives.
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Affiliation(s)
- Benedek Batizi
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
- Egis Pharmaceuticals Plc., Directorate of Drug Substance Development, P. O. Box 100, Keresztúri út 30-38, H-1475 Budapest, Hungary
| | - Patrik Pollák
- Egis Pharmaceuticals Plc., Directorate of Drug Substance Development, P. O. Box 100, Keresztúri út 30-38, H-1475 Budapest, Hungary
- Department of Organic Chemistry, Faculty of Pharmacy, Semmelweis University, Hőgyes Endre utca 7, H-1092 Budapest, Hungary
- Center for Pharmacology and Drug Research & Development, Semmelweis University, Üllői út 26, H-1085 Budapest, Hungary
| | - András Dancsó
- Egis Pharmaceuticals Plc., Directorate of Drug Substance Development, P. O. Box 100, Keresztúri út 30-38, H-1475 Budapest, Hungary
| | - Péter Keglevich
- Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary
| | - Gyula Simig
- Egis Pharmaceuticals Plc., Directorate of Drug Substance Development, P. O. Box 100, Keresztúri út 30-38, H-1475 Budapest, Hungary
| | - Balázs Volk
- Egis Pharmaceuticals Plc., Directorate of Drug Substance Development, P. O. Box 100, Keresztúri út 30-38, H-1475 Budapest, Hungary
| | - Mátyás Milen
- Egis Pharmaceuticals Plc., Directorate of Drug Substance Development, P. O. Box 100, Keresztúri út 30-38, H-1475 Budapest, Hungary
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2
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Németh AG, Marlok B, Domján A, Gao Q, Han X, Keserű GM, Ábrányi‐Balogh P. Convenient Multicomponent One‐Pot Synthesis of 2‐Iminothiazolines and 2‐Aminothiazoles Using Elemental Sulfur Under Aqueous Conditions. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100548] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- András Gy. Németh
- Medicinal Chemistry Research Group Research Centre for Natural Sciences Magyar tudósok krt. 2 1117 Budapest Hungary
| | - Bence Marlok
- Medicinal Chemistry Research Group Research Centre for Natural Sciences Magyar tudósok krt. 2 1117 Budapest Hungary
| | - Attila Domján
- NMR Research Laboratory Research Centre for Natural Sciences Magyar tudósok krt. 2 1117 Budapest Hungary
| | - Qinghe Gao
- School of Pharmacy Xinxiang Medical University Xinxiang Henan 453003 P. R. China
| | - Xinya Han
- School of Chemistry and Chemical Engineering Anhui University of Technology Maanshan Anhui 243002 P. R. China
| | - György M. Keserű
- Medicinal Chemistry Research Group Research Centre for Natural Sciences Magyar tudósok krt. 2 1117 Budapest Hungary
| | - Péter Ábrányi‐Balogh
- Medicinal Chemistry Research Group Research Centre for Natural Sciences Magyar tudósok krt. 2 1117 Budapest Hungary
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Kumar S, Malakar CC, Singh V. Cu(II)‐Catalysed Azide‐Alkyne Cycloaddition Reaction towards Synthesis of β‐Carboline C1‐Tethered 1,2,3‐Triazole Derivatives. ChemistrySelect 2021. [DOI: 10.1002/slct.202100002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sunit Kumar
- Department of Chemistry Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar 144011 Punjab India
| | - Chandi C. Malakar
- Department of Chemistry National Institute of Technology (NIT) Manipur Imphal 795004 India
| | - Virender Singh
- Department of Chemistry Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar 144011 Punjab India
- Department of Chemistry Central University of Punjab, Bathinda 151401 Punjab India
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Németh AG, Szabó R, Domján A, Keserű GM, Ábrányi‐Balogh P. Chromatography-Free Multicomponent Synthesis of Thioureas Enabled by Aqueous Solution of Elemental Sulfur. ChemistryOpen 2021; 10:16-27. [PMID: 33377316 PMCID: PMC7780808 DOI: 10.1002/open.202000250] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 12/14/2020] [Indexed: 12/17/2022] Open
Abstract
The development of a new three-component chromatography-free reaction of isocyanides, amines and elemental sulfur allowed us the straightforward synthesis of thioureas in water. Considering a large pool of organic and inorganic bases, we first optimized the preparation of aqueous polysulfide solution from elemental sulfur. Using polysulfide solution, we were able to omit the otherwise mandatory chromatography, and to isolate the crystalline products directly from the reaction mixture by a simple filtration, retaining the sulfur in the solution phase. A wide range of thioureas synthesized in this way confirmed the reasonable substrate and functional group tolerance of our protocol.
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Affiliation(s)
- András Gy. Németh
- Medicinal Chemistry Research GroupResearch Centre for Natural SciencesMagyar tudósok krt. 21117BudapestHungary
| | - Renáta Szabó
- Medicinal Chemistry Research GroupResearch Centre for Natural SciencesMagyar tudósok krt. 21117BudapestHungary
| | - Attila Domján
- NMR Research LaboratoryResearch Centre for Natural SciencesMagyar tudósok krt. 21117BudapestHungary
| | - György M. Keserű
- Medicinal Chemistry Research GroupResearch Centre for Natural SciencesMagyar tudósok krt. 21117BudapestHungary
| | - Péter Ábrányi‐Balogh
- Medicinal Chemistry Research GroupResearch Centre for Natural SciencesMagyar tudósok krt. 21117BudapestHungary
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5
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Untergehrer M, Bracher F. A short divergent approach to highly substituted carbazoles and β-carbolines via in situ-generated diketoindoles. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Szabó T, Dancsó A, Volk B, Milen M. First total synthesis of β-carboline alkaloid trigonostemine G and its derivatives. Nat Prod Res 2019; 35:72-79. [PMID: 31140881 DOI: 10.1080/14786419.2019.1613401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The β-carboline core is the base structure of several biologically active natural and unnatural compounds. Herein, we report the first total synthesis of trigonostemine G, which is a newly isolated natural β-carboline alkaloid from the twigs of Trigonostemon filipes. Synthesis of two structurally close derivatives of trigonostemine G is also reported. Key step of the syntheses involves a nucleophilic addition of 5-{[tert-butyl(dimethyl) silyl]oxy}-1H-indole to 1-formyl-β-carboline building blocks.
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Affiliation(s)
- Tímea Szabó
- Egis Pharmaceuticals Plc., Directorate of Drug Substance Development, Budapest, Hungary
| | - András Dancsó
- Egis Pharmaceuticals Plc., Directorate of Drug Substance Development, Budapest, Hungary
| | - Balázs Volk
- Egis Pharmaceuticals Plc., Directorate of Drug Substance Development, Budapest, Hungary
| | - Mátyás Milen
- Egis Pharmaceuticals Plc., Directorate of Drug Substance Development, Budapest, Hungary
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Recio J, Pérez-Redondo A, Alvarez-Builla J, Burgos C. Access to 2-substituted 1-pyridin-3-yl-β-carboline derivatives by intramolecular radical cyclization-ring opening-SNAr substitution. Org Chem Front 2019. [DOI: 10.1039/c9qo00944b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A new method for the synthesis of 1-pyridin-3-yl-β-carboline derivatives involving an intramolecular radical reaction and SNAr substitution, is described.
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Affiliation(s)
- Javier Recio
- Departamento de Química Orgánica y Química Inorgánica and Instituto de Investigación Química "Andrés M. del Río" (IQAR)
- Universidad de Alcalá
- 28805-Alcalá de Henares
- Madrid
- Spain
| | - Adrián Pérez-Redondo
- Departamento de Química Orgánica y Química Inorgánica and Instituto de Investigación Química "Andrés M. del Río" (IQAR)
- Universidad de Alcalá
- 28805-Alcalá de Henares
- Madrid
- Spain
| | - Julio Alvarez-Builla
- Departamento de Química Orgánica y Química Inorgánica and Instituto de Investigación Química "Andrés M. del Río" (IQAR)
- Universidad de Alcalá
- 28805-Alcalá de Henares
- Madrid
- Spain
| | - Carolina Burgos
- Departamento de Química Orgánica y Química Inorgánica and Instituto de Investigación Química "Andrés M. del Río" (IQAR)
- Universidad de Alcalá
- 28805-Alcalá de Henares
- Madrid
- Spain
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