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Ruskin J, Sachs RK, Wang M, Dekeyser R, Lew Z, Williams P, Hwang H, Majumdar A, Dudding T, Lectka T. Metal Ion-Induced Large Fragment Deactivation: A Different Strategy for Site-Selectivity in a Complex Molecule. Angew Chem Int Ed Engl 2024; 63:e202317070. [PMID: 38063469 DOI: 10.1002/anie.202317070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Indexed: 12/23/2023]
Abstract
Complex natural product functionalizations generally involve the use of highly engineered reagents, catalysts, or enzymes to react exclusively at a desired site through lowering of a select transition state energy. In this communication, we report a new, complementary strategy in which all transition states representing undesirable sites in a complex ionophore substrate are simultaneously energetically increased through the chelation of a metal ion to the large fragment we wish to neutralize. In the case of an electrophilic, radical based fluorination reaction, charge repulsion (electric field effects), induced steric effects, and electron withdrawal provide the necessary deactivation and proof of principle to afford a highly desirable natural product derivative. We envisage that many other electrophilic or charge based synthetic methods may be amenable to this approach as well.
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Affiliation(s)
- Jonah Ruskin
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Roseann K Sachs
- Department of Chemistry and Biochemistry, Messiah University, One University Avenue, Mechanicsburg, PA 17055, USA
| | - Muyuan Wang
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Roxanne Dekeyser
- Department of Chemistry, Brock University, St. Catharines, Ontario, L2S3A1, Canada
| | - Zachary Lew
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Phoebe Williams
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Habin Hwang
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Ananya Majumdar
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
| | - Travis Dudding
- Department of Chemistry, Brock University, St. Catharines, Ontario, L2S3A1, Canada
| | - Thomas Lectka
- Department of Chemistry, Johns Hopkins University, 3400N. Charles St, Baltimore, MD 21218, USA
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Correa-Ayala E, Campos-Alvarado C, Chávez D, Morales-Morales D, Hernández-Ortega S, García JJ, Flores-Álamo M, Miranda-Soto V, Parra-Hake M. RutheniumII(p-cymene) complexes bearing ligands of the type 1-[2′-(methoxycarbonyl)phenyl]-3-[4′-X-phenyl]triazenide (X = F, Cl, Br, I): Synthesis, structure and catalytic activity. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.06.064] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Electrogenic and nonelectrogenic ion fluxes across lipid and mitochondrial membranes mediated by monensin and monensin ethyl ester. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:995-1004. [DOI: 10.1016/j.bbamem.2015.01.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 12/18/2014] [Accepted: 01/10/2015] [Indexed: 02/04/2023]
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Structure and antimicrobial properties of monensin A and its derivatives: summary of the achievements. BIOMED RESEARCH INTERNATIONAL 2013; 2013:742149. [PMID: 23509771 PMCID: PMC3586448 DOI: 10.1155/2013/742149] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Revised: 12/15/2012] [Accepted: 12/29/2012] [Indexed: 11/30/2022]
Abstract
In this paper structural and microbiological studies on the ionophorous antibiotic monensin A and its derivatives have been collected. Monensin A is an ionophore which selectively complexes and transports sodium cation across lipid membranes, and therefore it shows a variety of biological properties. This antibiotic is commonly used as coccidiostat and nonhormonal growth promoter. The paper focuses on both the latest and earlier achievements concerning monensin A antimicrobial activity. The activities of monensin derivatives, including modifications of hydroxyl groups and carboxyl group, are also presented.
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Polyether ionophores—promising bioactive molecules for cancer therapy. Bioorg Med Chem Lett 2012; 22:7002-10. [DOI: 10.1016/j.bmcl.2012.09.046] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 09/13/2012] [Accepted: 09/15/2012] [Indexed: 01/06/2023]
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