1
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Camargo D, Cifuentes C, Castillo JC, Portilla J. Microwave-assisted synthesis and functionalization of 2-arylimidazo[1,2- a]pyrimidin-5(8 H)-ones. RSC Adv 2024; 14:22368-22373. [PMID: 39010922 PMCID: PMC11247617 DOI: 10.1039/d4ra03948c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Accepted: 06/20/2024] [Indexed: 07/17/2024] Open
Abstract
Despite the limited applications and scarcity of commercial examples of imidazo[1,2-a]pyrimidines, their exceptional properties hold great potential, representing a significant challenge in discovering more critical applications. Herein, we present a microwave-assisted approach for preparing 2-arylimidazo[1,2-a]pyrimidin-5(8H)-ones and their alkylation and bromination products using easily accessible and inexpensive reagents, thus offering a promising avenue for further search. Notably, the photophysical properties of an N-alkyl derivative were investigated, and the results highlight the high potential of these compounds as modular fluorophores. All the products were obtained with high yields using highly efficient protocols, and the regioselectivity of the reactions was determined on the basis of NMR measurements and X-ray diffraction analysis.
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Affiliation(s)
- Delascar Camargo
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de Los Andes Carrera 1 No. 18A-10 Bogotá 111711 Colombia
| | - Carlos Cifuentes
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de Los Andes Carrera 1 No. 18A-10 Bogotá 111711 Colombia
| | - Juan-Carlos Castillo
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de Los Andes Carrera 1 No. 18A-10 Bogotá 111711 Colombia
- Escuela de Ciencias Químicas, Universidad Pedagógica y Tecnológica de Colombia Avenida Central del Norte 39-115 Tunja Colombia
| | - Jaime Portilla
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de Los Andes Carrera 1 No. 18A-10 Bogotá 111711 Colombia
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2
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Singh K, Frydman L. Single-Scan Heteronuclear 13C- 15N J-Coupling NMR Observations Enhanced by Dissolution Dynamic Nuclear Polarization. J Phys Chem Lett 2024; 15:5659-5664. [PMID: 38767577 PMCID: PMC11145644 DOI: 10.1021/acs.jpclett.4c01190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 05/10/2024] [Accepted: 05/14/2024] [Indexed: 05/22/2024]
Abstract
Heteronuclear 13C-15N couplings were measured in single-scan nuclear magnetic resonance (NMR) experiments for a variety of nitrogen-containing chemical compounds with varied structural characteristics, by using a one-dimensional (1D) 13C-15N multiple-quantum (MQ)-filtered experiment. Sensitivity limitations of the MQ filtering were overcome by the combined use of 15N labeling and dissolution dynamic nuclear polarization (dDNP), performed at cryogenic conditions and followed by quick and optimized sample melting and transfer procedures. Coupling information could thus be obtained from nucleotide bases, amino acids, urea, and aliphatic and aromatic amides, including the measurement of relatively small J-couplings directly from the 1D filtered spectra. This experiment could pave the way for NMR-based analytical applications that investigate structural and stereochemical insights into nitrogen-containing compounds, including dipeptides and proteins, while relying on heteronuclear couplings and nuclear hyperpolarization.
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Affiliation(s)
- Kawarpal Singh
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 7610001 Rehovot, Israel
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, CB2 1EW Cambridge, United Kingdom
| | - Lucio Frydman
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, 7610001 Rehovot, Israel
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3
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Henderson SH, Sorrell FJ, Bennett JM, Fedorov O, Hanley MT, Godoi PH, Ruela de Sousa R, Robinson S, Navratilova IH, Elkins JM, Ward SE. Imidazo[1,2-b]pyridazines as inhibitors of DYRK kinases. Eur J Med Chem 2024; 269:116292. [PMID: 38479168 DOI: 10.1016/j.ejmech.2024.116292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 04/07/2024]
Abstract
Selective inhibitors of DYRK1A are of interest for the treatment of cancer, Type 2 diabetes and neurological disorders. Optimization of imidazo [1,2-b]pyridazine fragment 1 through structure-activity relationship exploration and in silico drug design efforts led to the discovery of compound 17 as a potent cellular inhibitor of DYRK1A with selectivity over much of the kinome. The binding mode of compound 17 was elucidated with X-ray crystallography, facilitating the rational design of compound 29, an imidazo [1,2-b]pyridazine with improved kinase selectivity with respect to closely related CLK kinases.
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Affiliation(s)
- Scott H Henderson
- Sussex Drug Discovery Centre, University of Sussex, Brighton, BN1 9RH, UK.
| | - Fiona J Sorrell
- Centre for Medicines Discovery, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7DQ, UK
| | - James M Bennett
- Target Discovery Institute, University of Oxford, Oxford, OX3 7FZ, UK
| | - Oleg Fedorov
- Centre for Medicines Discovery, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7DQ, UK
| | - Marcus T Hanley
- Medicines Discovery Institute, Cardiff University, CF10 3AT, UK
| | - Paulo H Godoi
- Structural Genomics Consortium, Universidade Estadual de Campinas, Cidade Universitária Zeferino Vaz, Av. Dr. André Tosello, 550, Barão Geraldo, Campinas, SP, 13083-886, Brazil
| | - Roberta Ruela de Sousa
- Structural Genomics Consortium, Universidade Estadual de Campinas, Cidade Universitária Zeferino Vaz, Av. Dr. André Tosello, 550, Barão Geraldo, Campinas, SP, 13083-886, Brazil
| | - Sean Robinson
- Exscientia, The Schrödinger Building, Oxford Science Park, Oxford, OX4 4GE, UK
| | - Iva Hopkins Navratilova
- Exscientia, The Schrödinger Building, Oxford Science Park, Oxford, OX4 4GE, UK; University of Dundee, Dow Street, Dundee, DD1 5EH, UK
| | - Jonathan M Elkins
- Centre for Medicines Discovery, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7DQ, UK; Structural Genomics Consortium, Universidade Estadual de Campinas, Cidade Universitária Zeferino Vaz, Av. Dr. André Tosello, 550, Barão Geraldo, Campinas, SP, 13083-886, Brazil.
| | - Simon E Ward
- Medicines Discovery Institute, Cardiff University, CF10 3AT, UK.
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4
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Wu J, Ling Z, Franco LR, Jeong SY, Genene Z, Mena J, Chen S, Chen C, Araujo CM, Marchiori CFN, Kimpel J, Chang X, Isikgor FH, Chen Q, Faber H, Han Y, Laquai F, Zhang M, Woo HY, Yu D, Anthopoulos TD, Wang E. On the Conformation of Dimeric Acceptors and Their Polymer Solar Cells with Efficiency over 18 . Angew Chem Int Ed Engl 2023; 62:e202302888. [PMID: 37380618 DOI: 10.1002/anie.202302888] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 06/30/2023]
Abstract
The determination of molecular conformations of oligomeric acceptors (OAs) and their impact on molecular packing are crucial for understanding the photovoltaic performance of their resulting polymer solar cells (PSCs) but have not been well studied yet. Herein, we synthesized two dimeric acceptor materials, DIBP3F-Se and DIBP3F-S, which bridged two segments of Y6-derivatives by selenophene and thiophene, respectively. Theoretical simulation and experimental 1D and 2D NMR spectroscopic studies prove that both dimers exhibit O-shaped conformations other than S- or U-shaped counter-ones. Notably, this O-shaped conformation is likely governed by a distinctive "conformational lock" mechanism, arising from the intensified intramolecular π-π interactions among their two terminal groups within the dimers. PSCs based on DIBP3F-Se deliver a maximum efficiency of 18.09 %, outperforming DIBP3F-S-based cells (16.11 %) and ranking among the highest efficiencies for OA-based PSCs. This work demonstrates a facile method to obtain OA conformations and highlights the potential of dimeric acceptors for high-performance PSCs.
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Affiliation(s)
- Jingnan Wu
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Göteborg, Sweden
- Department of Chemistry and Bioscience, Aalborg University, 9220, Aalborg, Denmark
| | - Zhaoheng Ling
- King Abdullah University of Science and Technology (KAUST), KAUST Solar Center, Thuwal, 23955, Saudi Arabia
| | - Leandro R Franco
- Department of Engineering and Physics, Karlstad University, 65188, Karlstad, Sweden
| | - Sang Young Jeong
- Department of Chemistry, Korea University, Seoul, 02841 (Republic of, Korea
| | - Zewdneh Genene
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Göteborg, Sweden
| | - Josué Mena
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Göteborg, Sweden
| | - Si Chen
- King Abdullah University of Science and Technology (KAUST), KAUST Solar Center, Thuwal, 23955, Saudi Arabia
| | - Cailing Chen
- Advanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - C Moyses Araujo
- Department of Engineering and Physics, Karlstad University, 65188, Karlstad, Sweden
- Materials Theory Division, Department of Physics and Astronomy, Uppsala University, 75120, Uppsala, Sweden
| | - Cleber F N Marchiori
- Department of Engineering and Physics, Karlstad University, 65188, Karlstad, Sweden
| | - Joost Kimpel
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Göteborg, Sweden
| | - Xiaoming Chang
- King Abdullah University of Science and Technology (KAUST), KAUST Solar Center, Thuwal, 23955, Saudi Arabia
| | - Furkan H Isikgor
- King Abdullah University of Science and Technology (KAUST), KAUST Solar Center, Thuwal, 23955, Saudi Arabia
| | - Qiaonan Chen
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Göteborg, Sweden
| | - Hendrik Faber
- King Abdullah University of Science and Technology (KAUST), KAUST Solar Center, Thuwal, 23955, Saudi Arabia
| | - Yu Han
- Advanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Frédéric Laquai
- King Abdullah University of Science and Technology (KAUST), KAUST Solar Center, Thuwal, 23955, Saudi Arabia
| | - Maojie Zhang
- National Engineering Research Center for Colloidal Materials, School of Chemistry & Chemical Engineering, Shandong University, Jinan, Shandong, 250100, China
| | - Han Young Woo
- Department of Chemistry, Korea University, Seoul, 02841 (Republic of, Korea
| | - Donghong Yu
- Department of Chemistry and Bioscience, Aalborg University, 9220, Aalborg, Denmark
| | - Thomas D Anthopoulos
- King Abdullah University of Science and Technology (KAUST), KAUST Solar Center, Thuwal, 23955, Saudi Arabia
| | - Ergang Wang
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Göteborg, Sweden
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5
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Urakov GV, Savateev KV, Rusinov VL. A Versatile Method for the Synthesis of 7-Aminoazolo[1,5-a]pyrimidine-6-carbonitriles. DOKLADY CHEMISTRY 2022. [DOI: 10.1134/s0012500822600304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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6
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Chatzopoulou M, Madden KS, Bromhead LJ, Greaves C, Cogswell TJ, Da Silva Pinto S, Galan SG, Georgiou I, Kennedy MS, Kennett A, Apps G, Russell AJ, Wynne GM. Pilot Study to Quantify Palladium Impurities in Lead-like Compounds Following Commonly Used Purification Techniques. ACS Med Chem Lett 2022; 13:262-270. [PMID: 35173892 PMCID: PMC8842129 DOI: 10.1021/acsmedchemlett.1c00638] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 01/11/2022] [Indexed: 01/03/2023] Open
Abstract
Palladium-catalyzed reactions are among the most commonly used procedures in organic synthesis. The products have a range of uses, including as intermediates in total synthesis and as screening compounds for drug discovery or agrochemical projects. Despite the known and potentially deleterious effects of low-level metal impurities in biological assays, the quantification of metal remaining in reaction products to verify the effective removal of the transition element is rarely reported. Using palladium as an exemplar, we describe a pilot study that for the first time quantifies residual metal levels in reaction products following increasingly rigorous purification protocols. Our results demonstrate that significant levels of residual palladium can remain in isolated reaction products following chromatographic purification, and only by using a subsequent metal scavenging step are they reliably reduced to a low level. Finally, we provide a set of simple guidelines that should minimize the potential for issues associated with residual palladium in reaction products.
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Affiliation(s)
- Maria Chatzopoulou
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Katrina S. Madden
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Liam J. Bromhead
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Christopher Greaves
- Department
of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3PQ, United
Kingdom
| | - Thomas J. Cogswell
- Department
of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3PQ, United
Kingdom
| | - Solange Da Silva Pinto
- Department
of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3PQ, United
Kingdom
| | - Sébastien
R. G. Galan
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Irene Georgiou
- Department
of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3PQ, United
Kingdom
| | - Matthew S. Kennedy
- Department
of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3PQ, United
Kingdom
| | - Alice Kennett
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Geraint Apps
- CEMAS, Imperial House,
Oaklands Business Centre, Oaklands Park,
Wokingham, Berkshire RG41 2FD, United Kingdom
| | - Angela J. Russell
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
- Department
of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3PQ, United
Kingdom
| | - Graham M. Wynne
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
- OxStem
Limited, Midland House,
West Way, Botley, Oxford OX2 0PH, United Kingdom
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7
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The Dimroth Rearrangement in the Synthesis of Condensed Pyrimidines - Structural Analogs of Antiviral Compounds. Chem Heterocycl Compd (N Y) 2021; 57:342-368. [PMID: 34024912 PMCID: PMC8121644 DOI: 10.1007/s10593-021-02913-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 11/16/2020] [Indexed: 11/30/2022]
Abstract
The review discusses the use of the Dimroth rearrangement in the synthesis of condensed pyrimidines which are key structural fragments of antiviral agents. The main attention is given to publications over the past 10 years. The bibliography includes 107 references.
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Key Words
- Dimroth rearrangement
- [1,2,4]triazolo[1,5-a]pyrimidines
- [1,2,4]triazolo[1,5-c]pyrimidines
- antiviral activity
- furo[2,3-d]pyrimidines
- imidazo[1,2-a]pyrimidines
- purines
- pyrazolo[3,4-d]pyrimidines
- pyrrolo[2,3-d]pyrimidines
- quinazolin(on)es
- thieno[2,3-d]pyrimidines
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8
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Obah Kosso AR, Kabri Y, Broggi J, Redon S, Vanelle P. Sequential Regioselective Diorganochalcogenations of Imidazo[1,2-a]pyrimidines Using I2/H3PO4 in Dimethylsulfoxide. J Org Chem 2020; 85:3071-3081. [DOI: 10.1021/acs.joc.9b02963] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Anne Roly Obah Kosso
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, Laboratoire de Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, 27 Boulevard Jean Moulin, 13385 Marseille, France
| | - Youssef Kabri
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, Laboratoire de Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, 27 Boulevard Jean Moulin, 13385 Marseille, France
| | - Julie Broggi
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, Laboratoire de Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, 27 Boulevard Jean Moulin, 13385 Marseille, France
| | - Sébastien Redon
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, Laboratoire de Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, 27 Boulevard Jean Moulin, 13385 Marseille, France
| | - Patrice Vanelle
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, Laboratoire de Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, 27 Boulevard Jean Moulin, 13385 Marseille, France
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Stable Isotope-Labeled Azoloazines. Synthesis of a 13С and 15N Isotope-Enriched Derivative of Pyrazolo[5,1-c][1,2,4]Triazine –Potential Antidiabetic Agent. Chem Heterocycl Compd (N Y) 2019. [DOI: 10.1007/s10593-019-02549-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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11
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Deev SL, Khalymbadzha IA, Shestakova TS, Charushin VN, Chupakhin ON. 15N labeling and analysis of 13C–15N and 1H–15N couplings in studies of the structures and chemical transformations of nitrogen heterocycles. RSC Adv 2019; 9:26856-26879. [PMID: 35528595 PMCID: PMC9070671 DOI: 10.1039/c9ra04825a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 08/19/2019] [Indexed: 11/21/2022] Open
Abstract
This review provides a generalization of effective examples of 15N labeling followed by an analysis of JCN and JHN couplings in solution as a tool to study the structural aspects and pathways of chemical transformations in nitrogen heterocycles.
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Affiliation(s)
- Sergey L. Deev
- Ural Federal University
- 620002 Yekaterinburg
- Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis
- 620219 Yekaterinburg
| | | | | | - Valery N. Charushin
- Ural Federal University
- 620002 Yekaterinburg
- Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis
- 620219 Yekaterinburg
| | - Oleg N. Chupakhin
- Ural Federal University
- 620002 Yekaterinburg
- Russian Federation
- I. Ya. Postovsky Institute of Organic Synthesis
- 620219 Yekaterinburg
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