1
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Meringdal JW, Kilian A, Li WC, Heinemann MJB, Rausch M, Schneider T, Menche D. Modular Synthesis of Halogenated Xanthones by a Divergent Coupling Strategy. J Org Chem 2022; 87:9375-9383. [PMID: 35776916 DOI: 10.1021/acs.joc.2c01157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A versatile strategy to halogenated xanthones was developed that relies on a modular coupling of vanillin derivatives with a dibromoquinone. Depending on the reaction conditions, either the 6- or the 7-bromo heterocycles may be obtained in a divergent manner. These heterocycles may be readily further elaborated by sequential Sonogashira couplings, and the sequence may be successfully applied to substructures of the antibiotic lysolipin.
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Affiliation(s)
- Jonas W Meringdal
- Kekulé Institute of Organic Chemistry and Biochemistry, University of Bonn, 53121 Bonn, Germany
| | - Alexander Kilian
- Kekulé Institute of Organic Chemistry and Biochemistry, University of Bonn, 53121 Bonn, Germany
| | - Wingkee C Li
- Kekulé Institute of Organic Chemistry and Biochemistry, University of Bonn, 53121 Bonn, Germany
| | | | - Marvin Rausch
- Institute for Pharmaceutical Microbiology, University Clinic Bonn, University of Bonn, 53115 Bonn, Germany.,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53115 Bonn, Germany
| | - Tanja Schneider
- Institute for Pharmaceutical Microbiology, University Clinic Bonn, University of Bonn, 53115 Bonn, Germany
| | - Dirk Menche
- Kekulé Institute of Organic Chemistry and Biochemistry, University of Bonn, 53121 Bonn, Germany
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2
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Grunwald MA, Wöhrle T, Forschner R, Baro A, Laschat S. Columnar Propeller‐Like 1,3,5‐Triphenylbenzenes: Probing the Effect of Chlorine on the Suzuki Cross‐Coupling and Liquid Crystalline Properties. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901827] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Marco André Grunwald
- Institut für Organische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Tobias Wöhrle
- Institut für Organische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Robert Forschner
- Institut für Organische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Angelika Baro
- Institut für Organische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Sabine Laschat
- Institut für Organische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
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3
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Alessi M, Patel JJ, Zumbansen K, Snieckus V. The Tetraethylphosphorodiamidate (OP(O)(NEt2)2) Directed Metalation Group (DMG). Directed ortho and Lateral Metalation and the Phospha Anionic Fries Rearrangement. Org Lett 2020; 22:2147-2151. [DOI: 10.1021/acs.orglett.0c00094] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Manlio Alessi
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston K7L 3N6, ON Canada
| | - Jignesh J. Patel
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston K7L 3N6, ON Canada
| | - Kristina Zumbansen
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston K7L 3N6, ON Canada
| | - Victor Snieckus
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston K7L 3N6, ON Canada
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4
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Nerdinger S, Kuatsjah E, Hurst TE, Schlapp-Hackl I, Kahlenberg V, Wurst K, Eltis LD, Snieckus V. Bacterial Catabolism of Biphenyls: Synthesis and Evaluation of Analogues. Chembiochem 2018; 19:1771-1778. [PMID: 29905982 DOI: 10.1002/cbic.201800231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Indexed: 12/31/2022]
Abstract
A series of alkylated 2,3-dihydroxybiphenyls has been prepared on the gram scale by using an effective Directed ortho Metalation-Suzuki-Miyaura cross-coupling strategy. These compounds have been used to investigate the substrate specificity of the meta-cleavage dioxygenase BphC, a key enzyme in the microbial catabolism of biphenyl. Isolation and characterization of the meta-cleavage products will allow further study of related processes, including the catabolism of lignin-derived biphenyls.
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Affiliation(s)
- Sven Nerdinger
- Global Commercial Operations, Sandoz GmbH, Biochemiestrasse 10, 6250, Kundl, Austria
| | - Eugene Kuatsjah
- Life Sciences Centre, 2350 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Timothy E Hurst
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, ON, K7L 3N6, Canada
| | - Inge Schlapp-Hackl
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Center for Chemistry and Biomedicine, Innrain 80-82, 6020, Innsbruck, Austria
| | - Volker Kahlenberg
- Institute of Mineralogy and Petrography, University of Innsbruck, Innrain 52, 6020, Innsbruck, Austria
| | - Klaus Wurst
- Faculty of Chemistry and Pharmacy, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - Lindsay D Eltis
- Life Sciences Centre, 2350 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Victor Snieckus
- Department of Chemistry, Queen's University, Chernoff Hall, Kingston, ON, K7L 3N6, Canada
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5
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Miah MAJ, Sibi MP, Chattopadhyay S, Familoni OB, Snieckus V. Directed ortho
-Metalation of O
-Aryl N
,N
-Dialkylcarbamates: Methodology, Anionic ortho
-Fries Rearrangement, and Lateral Metalation. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701142] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- M. A. Jalil Miah
- Department of Chemistry; Rajshahi University; 6205 Rajshahi Bangladesh
| | - Mukund P. Sibi
- Department of Chemistry; North Dakota State University; 5516 Fargo ND 58105- USA
| | - S. Chattopadhyay
- Department of Chemistry; Jadavpur University; 700032 Kolkata India
| | | | - Victor Snieckus
- Department of Chemistry; Queen's University; K7L 3N6 Kingston ON Canada
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6
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Zhang JS, Liu X, Weng J, Guo YQ, Li QJ, Ahmed A, Tang GH, Yin S. Natural diarylfluorene derivatives: isolation, total synthesis, and phosphodiesterase-4 inhibition. Org Chem Front 2017. [DOI: 10.1039/c6qo00623j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first total synthesis of selaginpulvilins A–F and evaluation of their PDE4 inhibitory activities.
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Affiliation(s)
- Jun-Sheng Zhang
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- People's Republic of
- China
| | - Xin Liu
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- People's Republic of
- China
| | - Jiang Weng
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- People's Republic of
- China
| | - Yan-Qiong Guo
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- People's Republic of
- China
| | - Qing-Jiang Li
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- People's Republic of
- China
| | - Abrar Ahmed
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- People's Republic of
- China
| | - Gui-Hua Tang
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- People's Republic of
- China
| | - Sheng Yin
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- People's Republic of
- China
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7
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Guilarte V, Castroviejo MP, Alvarez E, Sanz R. Combined directed ortho-zincation and palladium-catalyzed strategies: Synthesis of 4,n-dimethoxy-substituted benzo[b]furans. Beilstein J Org Chem 2011; 7:1255-60. [PMID: 21977210 PMCID: PMC3182435 DOI: 10.3762/bjoc.7.146] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2011] [Accepted: 07/21/2011] [Indexed: 12/31/2022] Open
Abstract
A new route to regioselectively dialkoxy-functionalized benzo[b]furan derivatives has been developed from 3-halo-2-iodoanisoles bearing an additional methoxy group, which have been accessed through an ortho-zincation/iodination reaction. Two palladium-catalyzed processes, namely a Sonogashira coupling followed by a tandem hydroxylation/cyclization sequence, give rise to new and interesting dimethoxy-substituted benzo[b]furans.
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Affiliation(s)
- Verónica Guilarte
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
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8
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Rossi R, Bellina F, Lessi M. Highly selective palladium-catalyzed Suzuki–Miyaura monocoupling reactions of ethene and arene derivatives bearing two or more electrophilic sites. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.06.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Luisi R, Giovine A, Florio S. New Arylaziridinyldifluoroborates: Useful Suzuki-Miyaura Reagents. Chemistry 2010; 16:2683-7. [DOI: 10.1002/chem.200902056] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Lack NA, Yam KC, Lowe ED, Horsman GP, Owen RL, Sim E, Eltis LD. Characterization of a carbon-carbon hydrolase from Mycobacterium tuberculosis involved in cholesterol metabolism. J Biol Chem 2010; 285:434-43. [PMID: 19875455 PMCID: PMC2804191 DOI: 10.1074/jbc.m109.058081] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Revised: 09/25/2009] [Indexed: 11/06/2022] Open
Abstract
In the recently identified cholesterol catabolic pathway of Mycobacterium tuberculosis, 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoate hydrolase (HsaD) is proposed to catalyze the hydrolysis of a carbon-carbon bond in 4,5-9,10-diseco-3-hydroxy-5,9,17-tri-oxoandrosta-1(10),2-diene-4-oic acid (DSHA), the cholesterol meta-cleavage product (MCP) and has been implicated in the intracellular survival of the pathogen. Herein, purified HsaD demonstrated 4-33 times higher specificity for DSHA (k(cat)/K(m) = 3.3 +/- 0.3 x 10(4) m(-1) s(-1)) than for the biphenyl MCP 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoic acid (HOPDA) and the synthetic analogue 8-(2-chlorophenyl)-2-hydroxy-5-methyl-6-oxoocta-2,4-dienoic acid (HOPODA), respectively. The S114A variant of HsaD, in which the active site serine was substituted with alanine, was catalytically impaired and bound DSHA with a K(d) of 51 +/- 2 mum. The S114A.DSHA species absorbed maximally at 456 nm, 60 nm red-shifted versus the DSHA enolate. Crystal structures of the variant in complex with HOPDA, HOPODA, or DSHA to 1.8-1.9 Aindicate that this shift is due to the enzyme-induced strain of the enolate. These data indicate that the catalytic serine catalyzes tautomerization. A second role for this residue is suggested by a solvent molecule whose position in all structures is consistent with its activation by the serine for the nucleophilic attack of the substrate. Finally, the alpha-helical lid covering the active site displayed a ligand-dependent conformational change involving differences in side chain carbon positions of up to 6.7 A, supporting a two-conformation enzymatic mechanism. Overall, these results provide novel insights into the determinants of specificity in a mycobacterial cholesterol-degrading enzyme as well as into the mechanism of MCP hydrolases.
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Affiliation(s)
| | - Katherine C. Yam
- the Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada, and
| | - Edward D. Lowe
- Molecular Biophysics, University of Oxford, Oxford OX1 3QT, United Kingdom
| | - Geoff P. Horsman
- the Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada, and
| | - Robin L. Owen
- the Swiss Light Source, Paul Scherrer Institut, 5232 Villigen, Switzerland
| | - Edith Sim
- From the Departments of Pharmacology and
| | - Lindsay D. Eltis
- the Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada, and
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11
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Abstract
AbstractDiflunisal and Felbinac, two FDA-approved NSAIDs and other biphenyl carboxylic acids were prepared in one step by a simple and clean Suzuki cross-coupling reaction using an easily synthesized, air and moisture stable, palladium-diamine complex. The yield (93%) for the one-step preparation of Diflunisal is the best reported without using a glovebox and a phoshine-based catalyst.
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12
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Studies of a ring-cleaving dioxygenase illuminate the role of cholesterol metabolism in the pathogenesis of Mycobacterium tuberculosis. PLoS Pathog 2009; 5:e1000344. [PMID: 19300498 PMCID: PMC2652662 DOI: 10.1371/journal.ppat.1000344] [Citation(s) in RCA: 178] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Accepted: 02/20/2009] [Indexed: 01/07/2023] Open
Abstract
Mycobacterium tuberculosis, the etiological agent of TB, possesses a cholesterol catabolic pathway implicated in pathogenesis. This pathway includes an iron-dependent extradiol dioxygenase, HsaC, that cleaves catechols. Immuno-compromised mice infected with a DeltahsaC mutant of M. tuberculosis H37Rv survived 50% longer than mice infected with the wild-type strain. In guinea pigs, the mutant disseminated more slowly to the spleen, persisted less successfully in the lung, and caused little pathology. These data establish that, while cholesterol metabolism by M. tuberculosis appears to be most important during the chronic stage of infection, it begins much earlier and may contribute to the pathogen's dissemination within the host. Purified HsaC efficiently cleaved the catecholic cholesterol metabolite, DHSA (3,4-dihydroxy-9,10-seconandrost-1,3,5(10)-triene-9,17-dione; k(cat)/K(m) = 14.4+/-0.5 microM(-1) s(-1)), and was inactivated by a halogenated substrate analogue (partition coefficient<50). Remarkably, cholesterol caused loss of viability in the DeltahsaC mutant, consistent with catechol toxicity. Structures of HsaC:DHSA binary complexes at 2.1 A revealed two catechol-binding modes: bidentate binding to the active site iron, as has been reported in similar enzymes, and, unexpectedly, monodentate binding. The position of the bicyclo-alkanone moiety of DHSA was very similar in the two binding modes, suggesting that this interaction is a determinant in the initial substrate-binding event. These data provide insights into the binding of catechols by extradiol dioxygenases and facilitate inhibitor design.
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