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Rizos SR, Peitsinis ZV, Koumbis AE. Total Synthesis of Enantiopure Chabrolonaphthoquinone B Via a Stereoselective Julia-Kocienski Olefination. J Org Chem 2021; 86:10440-10454. [PMID: 34247481 DOI: 10.1021/acs.joc.1c01106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The total synthesis of cytotoxic meroditerpenoid naphthoquinone derivative chabrolonaphthoquinone B (1) in an enantiospecific manner is divulged using a chiral pool approach. The key step of our synthetic route is a modified Julia olefination between a sulfone-bearing aliphatic fragment and a Diels-Alder-derived aromatic aldehyde, leading to the stereoselective construction of the E-trisubstituted double bond.
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Affiliation(s)
- Stergios R Rizos
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Zisis V Peitsinis
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Alexandros E Koumbis
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
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2
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P. O’Donovan F, O’Leary EM, O’Sullivan TP. Synthesis and Biological Evaluation of Novel Thionucleosides. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200608131955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The search for novel nucleosides has been a major research focus in medicinal
chemistry for several decades, particularly given their proven track record in the treatment
of viral infections and cancer. As bioisosteres of natural nucleosides, thionucleosides are
especially attractive targets as they often display improved biological activity. Furthermore,
the replacement of oxygen with sulfur may sometimes be accompanied by interesting
changes in pharmacological effect. This update covers recent advances in the preparation of
novel thionucleosides, grouped by synthetic strategy. The biological properties of the target
thionucleosides are also summarised, in addition to any reported structure activity relationships.
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Affiliation(s)
| | - Eileen M. O’Leary
- Department of Physical Sciences, Cork Institute of Technology, Cork, Ireland
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3
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Peitsinis ZV, Mitrakas AG, Nakiou EA, Melidou DA, Kalamida D, Kakouratos C, Koukourakis MI, Koumbis AE. Trachycladines and Analogues: Synthesis and Evaluation of Anticancer Activity. ChemMedChem 2017; 12:448-455. [PMID: 28195671 DOI: 10.1002/cmdc.201600620] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 02/14/2017] [Indexed: 02/05/2023]
Abstract
The synthesis of four new analogues of marine nucleoside trachycladine A was accomplished by direct regio- and stereoselective Vorbrüggen glycosylations of 2,6-dichloropurine and 2-chloropurine with a d-ribose-derived chiron. Naturally occurring trachycladines A and B and a series of analogues were examined for their cytotoxic activity against a number of cancer cell lines (glioblastoma, lung, and cervical cancer). Parent trachycladine A and two analogues (the diacetate of the 2,6-dichloropurine derivative and N-cyclopropyl trachycladine A) resulted in a significant decrease in cell viability, with the latter exhibiting a stronger effect. The same compounds enhanced the cytotoxic effect of docetaxel in lung cancer cell lines, whereas additional experiments revealed that their mode of action relies on mitotic catastrophe rather than DNA damage. Moreover, their activity as autophagic flux blockers was postulated.
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Affiliation(s)
- Zisis V Peitsinis
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Achilleas G Mitrakas
- Department of Radiotherapy and Oncology, Radiobiology and Radiopathology Unit, Medical School, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Eirini A Nakiou
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Dafni A Melidou
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Dimitra Kalamida
- Department of Radiotherapy and Oncology, Radiobiology and Radiopathology Unit, Medical School, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Christos Kakouratos
- Department of Radiotherapy and Oncology, Radiobiology and Radiopathology Unit, Medical School, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Michael I Koukourakis
- Department of Radiotherapy and Oncology, Radiobiology and Radiopathology Unit, Medical School, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Alexandros E Koumbis
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
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Kholodar S, Allen CL, Gulick AM, Murkin AS. The role of phosphate in a multistep enzymatic reaction: reactions of the substrate and intermediate in pieces. J Am Chem Soc 2015; 137:2748-56. [PMID: 25642788 PMCID: PMC4507815 DOI: 10.1021/ja512911f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Indexed: 01/17/2023]
Abstract
Several mechanistically unrelated enzymes utilize the binding energy of their substrate's nonreacting phosphoryl group to accelerate catalysis. Evidence for the involvement of the phosphodianion in transition state formation has come from reactions of the substrate in pieces, in which reaction of a truncated substrate lacking its phosphorylmethyl group is activated by inorganic phosphite. What has remained unknown until now is how the phosphodianion group influences the reaction energetics at different points along the reaction coordinate. 1-Deoxy-D-xylulose-5-phosphate (DXP) reductoisomerase (DXR), which catalyzes the isomerization of DXP to 2-C-methyl-D-erythrose 4-phosphate (MEsP) and subsequent NADPH-dependent reduction, presents a unique opportunity to address this concern. Previously, we have reported the effect of covalently linked phosphate on the energetics of DXP turnover. Through the use of chemically synthesized MEsP and its phosphate-truncated analogue, 2-C-methyl-D-glyceraldehyde, the current study revealed a loss of 6.1 kcal/mol of kinetic barrier stabilization upon truncation, of which 4.4 kcal/mol was regained in the presence of phosphite dianion. The activating effect of phosphite was accompanied by apparent tightening of its interactions within the active site at the intermediate stage of the reaction, suggesting a role of the phosphodianion in disfavoring intermediate release and in modulation of the on-enzyme isomerization equilibrium. The results of kinetic isotope effect and structural studies indicate rate limitation by physical steps when the covalent linkage is severed. These striking differences in the energetics of the natural reaction and the reactions in pieces provide a deeper insight into the contribution of enzyme-phosphodianion interactions to the reaction coordinate.
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Affiliation(s)
- Svetlana
A. Kholodar
- Department
of Chemistry, University at Buffalo, Buffalo, New York 14260-3000, United States
| | - C. Leigh Allen
- Hauptman-Woodward
Institute and Department of Structural Biology, University at Buffalo, Buffalo, New York 14203-1102, United States
| | - Andrew M. Gulick
- Hauptman-Woodward
Institute and Department of Structural Biology, University at Buffalo, Buffalo, New York 14203-1102, United States
| | - Andrew S. Murkin
- Department
of Chemistry, University at Buffalo, Buffalo, New York 14260-3000, United States
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Peitsinis ZV, Melidou DA, Stefanakis JG, Evgenidou H, Koumbis AE. A Versatile Total Synthesis of Trachycladines A and B and Their Analogues. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403091] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Rizos SR, Stefanakis JG, Kotoulas SS, Koumbis AE. Total Synthesis of Enantiopure Potassium Aeshynomate. J Org Chem 2014; 79:6646-54. [DOI: 10.1021/jo5011735] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stergios R. Rizos
- Laboratory of Organic Chemistry,
Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 541 24, Greece
| | - John G. Stefanakis
- Laboratory of Organic Chemistry,
Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 541 24, Greece
| | - Stefanos S. Kotoulas
- Laboratory of Organic Chemistry,
Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 541 24, Greece
| | - Alexandros E. Koumbis
- Laboratory of Organic Chemistry,
Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 541 24, Greece
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Synthesis and cytotoxic evaluation of novel pyrimidine deoxyapiothionucleosides. Bioorg Med Chem Lett 2013; 23:3364-7. [DOI: 10.1016/j.bmcl.2013.03.091] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Revised: 03/19/2013] [Accepted: 03/22/2013] [Indexed: 11/23/2022]
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Ferchichi L, Derbré S, Mahmood K, Touré K, Guilet D, Litaudon M, Awang K, Hadi AHA, Le Ray AM, Richomme P. Bioguided fractionation and isolation of natural inhibitors of advanced glycation end-products (AGEs) from Calophyllum flavoramulum. PHYTOCHEMISTRY 2012; 78:98-106. [PMID: 22445651 DOI: 10.1016/j.phytochem.2012.02.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 02/06/2012] [Accepted: 02/09/2012] [Indexed: 05/28/2023]
Abstract
Advanced glycation end-products (AGEs) are associated with many pathogenic disorders such as Alzheimer's disease, pathogenesis of diabetes, atherosclerosis or endothelial dysfunction leading to cardiovascular events. Clusiaceae and Calophyllaceae families are rich in compounds like polyphenols which are able to inhibit their formation and are therefore of great interest. Calophyllum flavoramulum Hend. & Wyatt-Sm., a native Malaysian plant, was selected after an anti-AGEs screening conducted on DCM and MeOH extracts from plants belonging to these aforementioned families. In a first study, bioguided fractionation of the MeOH leaf extract of C. flavoramulum afforded amentoflavone, 3-methoxy-2-hydroxyxanthone, 3,4-dihydroxy-tetrahydrofuran-3-carboxylic acid, quercitrin, 3,4-dihydroxybenzoic acid, canophyllol and apetalactone. Amentoflavone and 3-methoxy-2-hydroxyxanthone were found to be very potent (IC(50)=0.05 and 0.06 mM respectively), while anti-AGEs activities of quercitrin and 3,4-dihydroxybenzoic acid appeared as moderately strong (IC(50)=0.5 mM). In a second study, a systematic phytochemical study of the cyclohexane, DCM and EtOAc extracts obtained from the same plant was conducted to isolate the following products: flavoramulone, 6-deoxyjacareubin, rheediachromenoxanthone, 2,3-dihydroamentoflavone and benzoic acid. 3,4-Dihydroxy-tetrahydrofuran-3-carboxylic acid and flavoramulone were isolated for the first time and their structures were identified by means of IR, MS and NMR spectrometries.
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Affiliation(s)
- Loubna Ferchichi
- Université d'Annaba, Laboratoire de Phytochimie, Département de Chimie, Faculté des Sciences, BP12 Annaba, Algeria
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Kojima M, Nakamura Y, Akai S, Sato KI, Takeuchi S. Total syntheses of (+)- and (−)-1,3,4,5-tetragalloylapiitol and revision of absolute configuration of naturally occurring (−)-1,3,4,5-tetragalloylapiitol. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.08.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pedersen DS, Robinson TV, Taylor DK, Tiekink ERT. A Concise Route to Branched Erythrono-γ-lactones. Synthesis of the Leaf-Closing Substance Potassium (±)-(2R,3R)-2,3,4-Trihydroxy-2-methylbutanoate. J Org Chem 2009; 74:4400-3. [DOI: 10.1021/jo900392y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel Sejer Pedersen
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia, and Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, Texas 78249-0698
| | - Tony V. Robinson
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia, and Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, Texas 78249-0698
| | - Dennis K. Taylor
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia, and Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, Texas 78249-0698
| | - Edward R. T. Tiekink
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia, and Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, Texas 78249-0698
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Varvogli AAC, Karagiannis IN, Koumbis AE. Efficient synthesis of syringolides, secosyrins, and syributins through a common approach. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.11.079] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Totokotsopoulos SM, Koumbis AE, Gallos JK. Facile synthesis of 6a-carba-β-d-fructopyranose through an RCM approach. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.02.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Koumbis AE, Kotoulas SS, Gallos JK. A convenient synthesis of 2-C-methyl-d-erythritol 4-phosphate and isotopomers of its precursor. Tetrahedron 2007. [DOI: 10.1016/j.tet.2006.12.078] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2022]
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