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Williams ES, Gneid H, Marshall SR, González MJ, Mandelbaum JA, Busschaert N. A supramolecular host for phosphatidylglycerol (PG) lipids with antibacterial activity. Org Biomol Chem 2021; 20:5958-5966. [PMID: 34935024 DOI: 10.1039/d1ob02298a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Lipids fulfill a variety of important physiological functions, such as energy storage, providing a hydrophobic barrier, and signal transduction. Despite this plethora of biological roles, lipids are rarely considered a potential target for medical applications. Here, we report a set of neutral small molecules that contain boronic acid and urea functionalities to selectively recognize the bacterial lipid phosphatidylglycerol (PG). The affinity and selectivity was determined using 1H NMR titrations and a liposome-based Alizarin Red S assay. Minimum inhibitory concentrations (MIC) were determined to assess antibacterial activity. The most potent compounds display an association constant with PG in liposomes of at least 5 × 103 M-1, function as antibacterial agents against Gram-positive bacteria (MIC = 12.5-25 μM), and show little hemolytic activity. Mode of action studies suggest that the boronic acids bind to the headgroup of the PG lipids, which leads to a change in membrane fluidity and ultimately causes membrane depolarization and cell death.
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Affiliation(s)
- Elliot S Williams
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | - Hassan Gneid
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | - Sarah R Marshall
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | - Mario J González
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | - Jorgi A Mandelbaum
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | - Nathalie Busschaert
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
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2
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Herschede SR, Gneid H, Dent T, Jaeger EB, Lawson LB, Busschaert N. Bactericidal urea crown ethers target phosphatidylethanolamine membrane lipids. Org Biomol Chem 2021; 19:3838-3843. [PMID: 33949594 DOI: 10.1039/d1ob00263e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
An increasing number of people are infected with antibiotic-resistant bacteria each year, sometimes with fatal consequences. In this manuscript, we report a novel urea-functionalized crown ether that can bind to the bacterial lipid phosphatidylethanolamine (PE), facilitate PE flip-flop and displays antibacterial activity against the Gram-positive bacterium Bacillus cereus with a minimum inhibitory concentration comparable to that of the known PE-targeting lantibiotic duramycin.
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Affiliation(s)
- Sarah R Herschede
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | - Hassan Gneid
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | - Taylor Dent
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | - Ellen B Jaeger
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
| | - Louise B Lawson
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, Louisiana 70112, USA
| | - Nathalie Busschaert
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
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3
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Virelli M, Wang W, Kuniyil R, Wu J, Zanoni G, Fernandez A, Scott J, Vendrell M, Ackermann L. BODIPY‐Labeled Cyclobutanes by Secondary C(sp
3
)−H Arylations for Live‐Cell Imaging. Chemistry 2019; 25:12712-12718. [DOI: 10.1002/chem.201903461] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 08/19/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Matteo Virelli
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
- Department of ChemistryUniversity of Pavia Viale Taramelli 10 27100 Pavia Italy
| | - Wei Wang
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Rositha Kuniyil
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Jun Wu
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Giuseppe Zanoni
- Department of ChemistryUniversity of Pavia Viale Taramelli 10 27100 Pavia Italy
| | - Antonio Fernandez
- Centre for Inflammation ResearchThe University of Edinburgh EH16 4TJ Edinburgh UK
| | - Jamie Scott
- Centre for Inflammation ResearchThe University of Edinburgh EH16 4TJ Edinburgh UK
| | - Marc Vendrell
- Centre for Inflammation ResearchThe University of Edinburgh EH16 4TJ Edinburgh UK
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
- Department of ChemistryUniversity of Pavia Viale Taramelli 10 27100 Pavia Italy
- German Center for Cardiovascular Research (DZHK) Potsdamer Strasse 58 10785 Berlin Germany
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4
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Yamashita T, Nishikawa H, Kawamoto T. Scale-up synthesis of a deuterium-labeled cis-cyclobutane-1,3-Dicarboxylic acid derivative using continuous photo flow chemistry. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Wang Z, Miller B, Mabin M, Shahni R, Wang ZD, Ugrinov A, Chu QR. Cyclobutane-1,3-Diacid (CBDA): A Semi-Rigid Building Block Prepared by [2+2] Photocyclization for Polymeric Materials. Sci Rep 2017; 7:13704. [PMID: 29057941 PMCID: PMC5651925 DOI: 10.1038/s41598-017-13983-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 10/04/2017] [Indexed: 01/30/2023] Open
Abstract
A previously overlooked building block, cyclobutane-1,3-diacid (CBDA), is introduced to materials synthesis due to its great potentials. As an example of CBDA, α-truxillic acid or 2,4-diphenylcyclobutane-1,3-dicarboxylic acid, was readily synthesized from commercially available trans-cinnamic acid. This CBDA showed outstanding stability both in sunlight and upon heating. While its two carboxylic acid groups can be readily utilized in connecting with other molecules to form new materials, the cyclobutane ring was able to tolerate acid and base treatments showing good chemical stability. A series of cyclobutane-containing polymers (CBPs), namely poly-α-truxillates, were obtained by condensation between α-truxillic acid and diols including ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-petanediol, and 1,6-hexanediol. The structures of these poly-α-truxillates were analyzed by NMR, FT-IR, and HRMS. Powder X-ray diffraction results of the poly-α-truxillates indicated that they are semi-crystalline materials. Preliminary thermal, chemical, and photochemical tests showed that the poly-α-truxillates exhibited comparable stabilities to PET.
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Affiliation(s)
- Zhihan Wang
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Benjamin Miller
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Micah Mabin
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Rahul Shahni
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Zijun D Wang
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Angel Ugrinov
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND, 58102, USA
| | - Qianli R Chu
- Department of Chemistry, University of North Dakota, Grand Forks, ND, 58202, USA.
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6
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Poplata S, Tröster A, Zou YQ, Bach T. Recent Advances in the Synthesis of Cyclobutanes by Olefin [2 + 2] Photocycloaddition Reactions. Chem Rev 2016; 116:9748-815. [PMID: 27018601 PMCID: PMC5025837 DOI: 10.1021/acs.chemrev.5b00723] [Citation(s) in RCA: 661] [Impact Index Per Article: 82.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Indexed: 11/30/2022]
Abstract
The [2 + 2] photocycloaddition is undisputedly the most important and most frequently used photochemical reaction. In this review, it is attempted to cover all recent aspects of [2 + 2] photocycloaddition chemistry with an emphasis on synthetically relevant, regio-, and stereoselective reactions. The review aims to comprehensively discuss relevant work, which was done in the field in the last 20 years (i.e., from 1995 to 2015). Organization of the data follows a subdivision according to mechanism and substrate classes. Cu(I) and PET (photoinduced electron transfer) catalysis are treated separately in sections 2 and 4 , whereas the vast majority of photocycloaddition reactions which occur by direct excitation or sensitization are divided within section 3 into individual subsections according to the photochemically excited olefin.
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Affiliation(s)
- Saner Poplata
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - Andreas Tröster
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - You-Quan Zou
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - Thorsten Bach
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
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7
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Gutekunst WR, Baran PS. Applications of C-H functionalization logic to cyclobutane synthesis. J Org Chem 2014; 79:2430-52. [PMID: 24548142 PMCID: PMC3985916 DOI: 10.1021/jo4027148] [Citation(s) in RCA: 150] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Indexed: 02/08/2023]
Abstract
The application of C-H functionalization logic to target-oriented synthesis provides an exciting new venue for the development of new and useful strategies in organic chemistry. In this article, C-H functionalization reactions are explored as an alternative approach to access pseudodimeric cyclobutane natural products, such as the dictazole and the piperarborenine families. The use of these strategies in a variety of complex settings highlights the subtle geometric, steric, and electronic effects at play in the auxiliary guided C-H functionalization of cyclobutanes.
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Affiliation(s)
- Will R. Gutekunst
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Phil S. Baran
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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8
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Parella R, Gopalakrishnan B, Babu SA. Direct Bis-Arylation of Cyclobutanecarboxamide via Double C–H Activation: An Auxiliary-Aided Diastereoselective Pd-Catalyzed Access to Trisubstituted Cyclobutane Scaffolds Having Three Contiguous Stereocenters and an All-cis Stereochemistry. J Org Chem 2013; 78:11911-34. [DOI: 10.1021/jo4019733] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Ramarao Parella
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Manauli
P.O., Sector 81, SAS Nagar, Mohali, Knowledge
City, Punjab 140306, India
| | - Bojan Gopalakrishnan
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Manauli
P.O., Sector 81, SAS Nagar, Mohali, Knowledge
City, Punjab 140306, India
| | - Srinivasarao Arulananda Babu
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Manauli
P.O., Sector 81, SAS Nagar, Mohali, Knowledge
City, Punjab 140306, India
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9
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Gutekunst WR, Baran PS. Total synthesis and structural revision of the piperarborenines via sequential cyclobutane C-H arylation. J Am Chem Soc 2011; 133:19076-9. [PMID: 22066860 PMCID: PMC3223735 DOI: 10.1021/ja209205x] [Citation(s) in RCA: 276] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A strategy for the construction of unsymmetrical cyclobutanes using C-H functionalization logic is demonstrated in the total synthesis of piperarborenine B and piperarborenine D (reported structure). These syntheses feature a new preparation of cis-cyclobutane dicarboxylates from commercially available coumalate starting materials and a divergent approach to the controlled cis or trans installation of the two distinct aryl rings found in the natural products using the first example of cyclobutane C-H arylation. The structure of piperarborenine D is reassigned to a head-to-head dimer, which was synthesized using an intramolecular [2+2] photocycloaddition strategy.
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Affiliation(s)
- Will R Gutekunst
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
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