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Cortés I, Cordisco E, Kaufman TS, Sortino MA, Svetaz LA, Bracca ABJ. First total synthesis of chromanone A, preparation of related compounds and evaluation of their antifungal activity against Candida albicans, a biofilm forming agent. RSC Adv 2021; 11:19587-19597. [PMID: 35479228 PMCID: PMC9033609 DOI: 10.1039/d1ra02553h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 05/24/2021] [Indexed: 11/21/2022] Open
Abstract
A straightforward and convenient approach for the first total syntheses of chromanone A and a related 7-OMe substituted natural product is reported. These unique C-3 substituted 2-hydroxymethyl chromones were recently isolated as fungal metabolites. Chromanone A was synthesized in 25.3% overall yield from the readily available pyrocatechol, whereas the second natural product was prepared in 39.7% global yield. A small library of chromones, including both natural products and some of their synthetic heterocyclic precursors, was evaluated against Candida albicans ATCC 10231, a biofilm forming agent. It was found that 8-methoxy-3-methyl-4-oxo-4H-chromene-2-carbaldehyde, a partially oxidized form of chromanone A, exhibited a minimum inhibitory concentration of 7.8 μg mL-1 and significantly inhibited the yeast's virulence factors, including the adherence to buccal epithelial cells and the secretion of phospholipases, as well as the formation of germ tubes and the generation of the hyphal pseudomycelium. In addition, despite the heterocycle exhibiting non-significant inhibition of the formation of the Candida biofilm, it completely inhibited the growth of C. albicans in preformed biofilms at 62.5 μg mL-1.
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Affiliation(s)
- Iván Cortés
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| | - Estefanía Cordisco
- Area Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| | - Teodoro S Kaufman
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| | - Maximiliano A Sortino
- Area Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| | - Laura A Svetaz
- Area Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| | - Andrea B J Bracca
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
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Garzón-Posse F, Prunet J, Gamba-Sánchez D. An alternative approach to the synthesis of the three fragments of anachelin H. Org Biomol Chem 2020; 18:2702-2715. [PMID: 32207760 DOI: 10.1039/d0ob00315h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of the fully protected peptide, polyketide and alkaloid fragments of anachelin H is presented. The peptide fragment was prepared using a liquid phase peptide synthesis; the polyketide fragment was synthetized using a cross metathesis and an intramolecular oxa-Michael reaction as the key steps to introduce the desired stereochemistry; finally, the alkaloid fragment was obtained by an oxidative cyclization of a catechol derivative using potassium ferricyanide. The synthesis of all fragments was based on the use of natural amino acids as sources of asymmetry. The independent synthesis of the three fragments should allow more efficient biological studies on the fragments instead of the whole natural product. Experiments to illustrate the coupling of fragments and the effectiveness of the convergent strategy are also described.
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Affiliation(s)
- Fabián Garzón-Posse
- Laboratory of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de los Andes, Cra 1 No. 18A-12 Q:305, Bogotá 111711, Colombia.
| | - Joëlle Prunet
- WestCHEM, School of Chemistry, University of Glasgow, Joseph Black Building, University Avenue, Glasgow G12 8QQ, UK
| | - Diego Gamba-Sánchez
- Laboratory of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de los Andes, Cra 1 No. 18A-12 Q:305, Bogotá 111711, Colombia.
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Broadley KJ, Burnell E, Davies RH, Lee ATL, Snee S, Thomas EJ. The synthesis of a series of adenosine A3 receptor agonists. Org Biomol Chem 2016; 14:3765-81. [PMID: 27001924 DOI: 10.1039/c6ob00244g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A series of 1'-(6-aminopurin-9-yl)-1'-deoxy-N-methyl-β-d-ribofuranuronamides that were characterised by 2-dialkylamino-7-methyloxazolo[4,5-b]pyridin-5-ylmethyl substituents on N6 of interest for screening as selective adenosine A3 receptor agonists, have been synthesised. This work involved the synthesis of 2-dialkylamino-5-aminomethyl-7-methyloxazolo[4,5-b]pyridines and analogues that were coupled with the known 1'-(6-chloropurin-9-yl)-1'-deoxy-N-methyl-β-d-ribofuranuronamide. The oxazolo[4,5-b]pyridines were synthesized by regioselective functionalisation of 2,4-dimethylpyridine N-oxides. The regioselectivities of these reactions were found to depend upon the nature of the heterocycle with 2-dimethylamino-5,7-dimethyloxazolo[4,5-b]pyridine-N-oxide undergoing regioselective functionalisation at the 7-methyl group on reaction with trifluoroacetic anhydride in contrast to the reaction of 4,6-dimethyl-3-hydroxypyridine-N-oxide with acetic anhydride that resulted in functionalisation of the 6-methyl group. To optimise selectivity for the A3 receptor, 5-aminomethyl-7-bromo-2-dimethylamino-4-[(3-methylisoxazol-5-yl)methoxy]benzo[d]oxazole was synthesised and coupled with the 1'-(6-chloropurin-9-yl)-1'-deoxy-N-methyl-β-d-ribofuranuronamide. The products were active as selective adenosine A3 agonists.
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Affiliation(s)
- Kenneth J Broadley
- Cardiff School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff, CF10 3NB, UK
| | - Erica Burnell
- The School of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | | | - Alan T L Lee
- The School of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | - Stephen Snee
- The School of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | - Eric J Thomas
- The School of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
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Ghosh AK, Takayama J, Kassekert LA, Ella-Menye JR, Yashchuk S, Agniswamy J, Wang YF, Aoki M, Amano M, Weber IT, Mitsuya H. Structure-based design, synthesis, X-ray studies, and biological evaluation of novel HIV-1 protease inhibitors containing isophthalamide-derived P2-ligands. Bioorg Med Chem Lett 2015; 25:4903-4909. [PMID: 26096678 DOI: 10.1016/j.bmcl.2015.05.052] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 05/19/2015] [Accepted: 05/21/2015] [Indexed: 10/23/2022]
Abstract
We describe the design, synthesis and biological evaluation of a series of novel HIV-1 protease inhibitors bearing isophthalamide derivatives as the P2-P3 ligands. We have investigated a range of acyclic and heterocyclic amides as the extended P2-P3 ligands. These inhibitors displayed good to excellent HIV-1 protease inhibitory activity. Also, a number of inhibitors showed very good antiviral activity in MT cells. Compound 5n has shown an enzyme Ki of 0.17 nM and antiviral IC50 of 14 nM. An X-ray crystal structure of inhibitor 5o-bound to HIV-1 protease was determined at 1.11Å resolution. This structure revealed important molecular insight into the inhibitor-HIV-1 protease interactions in the active site.
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Affiliation(s)
- Arun K Ghosh
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, IN 47907, USA.
| | - Jun Takayama
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Luke A Kassekert
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Jean-Rene Ella-Menye
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Sofiya Yashchuk
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Johnson Agniswamy
- Departments of Biology and Chemistry, Georgia State University, Atlanta, GA 30303, USA
| | - Yuan-Fang Wang
- Departments of Biology and Chemistry, Georgia State University, Atlanta, GA 30303, USA
| | - Manabu Aoki
- Departments of Hematology and Infectious Diseases, Kumamoto University of Medicine, Kumamoto 860-8556, Japan
| | - Masayuki Amano
- Departments of Hematology and Infectious Diseases, Kumamoto University of Medicine, Kumamoto 860-8556, Japan
| | - Irene T Weber
- Departments of Biology and Chemistry, Georgia State University, Atlanta, GA 30303, USA
| | - Hiroaki Mitsuya
- Departments of Hematology and Infectious Diseases, Kumamoto University of Medicine, Kumamoto 860-8556, Japan; Experimental Retrovirology Section, HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD 20892, USA; Center for Clinical Sciences, National Center for Global Health and Medicine, Shinjuku, Tokyo 162-8655, Japan
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Park EJ, Lee S, Chang S. Acetone Cyanohydrin as a Source of HCN in the Cu-Catalyzed Hydrocyanation of α-Aryl Diazoacetates. J Org Chem 2010; 75:2760-2. [DOI: 10.1021/jo100356d] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Eun Ju Park
- Department of Chemistry and Molecular-Level Interface Research Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
| | - Seungeon Lee
- Department of Chemistry and Molecular-Level Interface Research Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
| | - Sukbok Chang
- Department of Chemistry and Molecular-Level Interface Research Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
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A novel strategy for the expeditious synthesis of aryl-tethered highly congested 2-hydroxybenzyl alcohols from 2-pyranones. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.09.082] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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A Facile Synthesis of 2-Chloro-5,7-dihydro-pyrrolo[3,4-b]pyridine-6-carboxamidine, an Annulated Nicotinoid. B KOREAN CHEM SOC 2004. [DOI: 10.5012/bkcs.2004.25.6.924] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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