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Kochanowska-Karamyan AJ, Araujo HC, Zhang X, El-Alfy A, Carvalho P, Avery MA, Holmbo SD, Magolan J, Hamann MT. Isolation and Synthesis of Veranamine, an Antidepressant Lead from the Marine Sponge Verongula rigida. J Nat Prod 2020; 83:1092-1098. [PMID: 32227883 DOI: 10.1021/acs.jnatprod.9b01107] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The natural product veranamine was isolated from the marine sponge Verongula rigida. It contains a unique heterocyclic scaffold and demonstrates in vivo antidepressant activity and selective affinity for 5HT2B and sigma-1 receptors. The first total synthesis of veranamine is reported. Our scalable synthesis offers veranamine in six steps and 25% yield via an unprecedented vinylogous Pictet-Gams pyridine formation strategy. Veranamine is a promising new lead compound for antidepressant drug development.
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Affiliation(s)
- Anna J Kochanowska-Karamyan
- Departments of Pharmacognosy and Pharmacology, National Center for Natural Products Research, University of Mississippi, University Park, Mississippi 38677, United States
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University HSC, Amarillo, Texas 79106, United States
| | - Hugo C Araujo
- Department of Chemistry, University of Idaho, Moscow, Idaho 83844, United States
| | - Xiong Zhang
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON L8N 3Z5, Canada
- Department of Chemistry, University of Idaho, Moscow, Idaho 83844, United States
| | - Abir El-Alfy
- Departments of Pharmacognosy and Pharmacology, National Center for Natural Products Research, University of Mississippi, University Park, Mississippi 38677, United States
- Department of Biopharmaceutical Sciences, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, United States
| | - Paulo Carvalho
- Departments of Pharmacognosy and Pharmacology, National Center for Natural Products Research, University of Mississippi, University Park, Mississippi 38677, United States
- Feik School of Pharmacy, University of the Incarnate Word, San Antonio, Texas 78209, United States
| | - Mitchell A Avery
- Departments of Pharmacognosy and Pharmacology, National Center for Natural Products Research, University of Mississippi, University Park, Mississippi 38677, United States
| | - Stephen D Holmbo
- Department of Chemistry, University of Idaho, Moscow, Idaho 83844, United States
| | - Jakob Magolan
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON L8N 3Z5, Canada
- Department of Chemistry, University of Idaho, Moscow, Idaho 83844, United States
| | - Mark T Hamann
- Departments of Pharmacognosy and Pharmacology, National Center for Natural Products Research, University of Mississippi, University Park, Mississippi 38677, United States
- Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, South Carolina 29425, United States
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Abstract
A synthetic approach to anthraquinone-xanthone heterodimers is described. The route to the pentacyclic core features an efficient assembly of a benzocycloheptenone via a new intramolecular oxidative arylation of an enol ether and a Hauser-Kraus annulation-aldol reaction sequence to access the characteristic bicyclo[3.2.2]nonene motif. Acremoxanthone A is synthesized in 10 steps from commercially available material to demonstrate the application of this approach.
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Affiliation(s)
- Stephen D Holmbo
- Department of Chemistry , University of California , Irvine , California 92697-2025 , United States
| | - Sergey V Pronin
- Department of Chemistry , University of California , Irvine , California 92697-2025 , United States
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Holmbo SD, Godfrey NA, Hirner JJ, Pronin SV. A Catalytic Intermolecular Formal Ene Reaction between Ketone-Derived Silyl Enol Ethers and Alkynes. J Am Chem Soc 2016; 138:12316-9. [PMID: 27626462 DOI: 10.1021/jacs.6b06847] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A catalytic formal ene reaction between ketone-derived silyl enol ethers and terminal alkynes is described. This transformation is uniquely capable of bimolecular assembly of 2-siloxy-1,4-dienes and can be used to access β,γ-unsaturated ketones containing quaternary carbons in the α-position.
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Affiliation(s)
- Stephen D Holmbo
- Department of Chemistry, University of California , Irvine, California 92697-2025, United States
| | - Nicole A Godfrey
- Department of Chemistry, University of California , Irvine, California 92697-2025, United States
| | - Joshua J Hirner
- Department of Chemistry, University of California , Irvine, California 92697-2025, United States
| | - Sergey V Pronin
- Department of Chemistry, University of California , Irvine, California 92697-2025, United States
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