1
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Movahhed S, Westphal J, Kempa A, Schumacher CE, Sperlich J, Neudörfl J, Teusch N, Hochgürtel M, Schmalz H. Total Synthesis of (+)-Erogorgiaene and the Pseudopterosin A-F Aglycone via Enantioselective Cobalt-Catalyzed Hydrovinylation. Chemistry 2021; 27:11574-11579. [PMID: 34096655 PMCID: PMC8456859 DOI: 10.1002/chem.202101863] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Indexed: 12/04/2022]
Abstract
Due to their pronounced bioactivity and limited availability from natural resources, metabolites of the soft coral Pseudopterogorgia elisabethae, such as erogorgiaene and the pseudopterosines, represent important target molecules for chemical synthesis. We have now developed a particularly short and efficient route towards these marine diterpenes exploiting an operationally convenient enantioselective cobalt-catalyzed hydrovinylation as the chirogenic step. Other noteworthy C-C bond forming transformations include diastereoselective Lewis acid-mediated cyclizations, a Suzuki coupling and a carbonyl ene reaction. Starting from 4-methyl-styrene the anti-tubercular agent (+)-erogorgiaene (>98 % ee) was prepared in only 7 steps with 46 % overall yield. In addition, the synthesis of the pseudopterosin A aglycone was achieved in 12 steps with 30 % overall yield and, surprisingly, was found to exhibit a similar anti-inflammatory activity (inhibition of LPS-induced NF-κB activation) as a natural mixture of pseudopterosins A-D or iso-pseudopterosin A, prepared by β-D-xylosylation of the synthetic aglycone.
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Affiliation(s)
| | | | - Alexander Kempa
- TH Köln, Faculty of Applied Natural SciencesKaiser-Wilhelm-Allee, G. E3951373LeverkusenGermany
| | | | - Julia Sperlich
- TH Köln, Faculty of Applied Natural SciencesKaiser-Wilhelm-Allee, G. E3951373LeverkusenGermany
| | | | - Nicole Teusch
- TH Köln, Faculty of Applied Natural SciencesKaiser-Wilhelm-Allee, G. E3951373LeverkusenGermany
| | - Matthias Hochgürtel
- TH Köln, Faculty of Applied Natural SciencesKaiser-Wilhelm-Allee, G. E3951373LeverkusenGermany
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2
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Menchikov LG, Shulishov EV, Tomilov YV. Recent advances in the catalytic cyclopropanation of unsaturated compounds with diazomethane. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4982] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The main achievements and development trends of the past 10–15 years related to the catalytic cyclopropanation of unsaturated compounds with diazomethane are integrated and analyzed. The attention is focused on the most efficient catalysts based on palladium compounds. Data on the effects of substrate structure and nature of catalyst components on the regio- and stereoselectivity of these reactions are systematized. Characteristic features of safe methods for diazomethane generation are considered, including the use of membrane technologies and continuous-flow and in situ preparation methods, which have prospects for industrial application.
The bibliography includes 281 references.
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3
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Niu H, Strecker TE, Gerberich JL, Campbell JW, Saha D, Mondal D, Hamel E, Chaplin DJ, Mason RP, Trawick ML, Pinney KG. Structure Guided Design, Synthesis, and Biological Evaluation of Novel Benzosuberene Analogues as Inhibitors of Tubulin Polymerization. J Med Chem 2019; 62:5594-5615. [PMID: 31059248 DOI: 10.1021/acs.jmedchem.9b00551] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A promising design paradigm for small-molecule inhibitors of tubulin polymerization that bind to the colchicine site draws structural inspiration from the natural products colchicine and combretastatin A-4 (CA4). Our previous studies with benzocycloalkenyl and heteroaromatic ring systems yielded promising inhibitors with dihydronaphthalene and benzosuberene analogues featuring phenolic (KGP03 and KGP18) and aniline (KGP05 and KGP156) congeners emerging as lead agents. These molecules demonstrated dual mechanism of action, functioning both as potent vascular disrupting agents (VDAs) and as highly cytotoxic anticancer agents. A further series of analogues was designed to extend functional group diversity and investigate regioisomeric tolerance. Ten new molecules were effective inhibitors of tubulin polymerization (IC50 < 5 μM) with seven of these exhibiting highly potent activity comparable to CA4, KGP18, and KGP03. For one of the most effective agents, dose-dependent vascular shutdown was demonstrated using dynamic bioluminescence imaging in a human prostate tumor xenograft growing in a rat.
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Affiliation(s)
- Haichan Niu
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place, No. 97348 , Waco , Texas 76798-7348 , United States
| | - Tracy E Strecker
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place, No. 97348 , Waco , Texas 76798-7348 , United States
| | - Jeni L Gerberich
- Department of Radiology , The University of Texas Southwestern Medical Center , 5323 Harry Hines Boulevard , Dallas , Texas 75390-9058 , United States
| | - James W Campbell
- Department of Radiology , The University of Texas Southwestern Medical Center , 5323 Harry Hines Boulevard , Dallas , Texas 75390-9058 , United States
| | - Debabrata Saha
- Department of Radiology Oncology, Division of Molecular Radiation Biology , The University of Texas Southwestern Medical Center , 2201 Inwood Road , Dallas , Texas 75390-9187 , United States
| | - Deboprosad Mondal
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place, No. 97348 , Waco , Texas 76798-7348 , United States
| | - Ernest Hamel
- Screening Technologies Branch, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis , National Cancer Institute, Frederick National Laboratory for Cancer Research, National Institutes of Health , Frederick , Maryland 21702 , United States
| | - David J Chaplin
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place, No. 97348 , Waco , Texas 76798-7348 , United States.,Mateon Therapeutics, Inc. , 701 Gateway Boulevard, Suite 210 , South San Francisco , California 94080 , United States
| | - Ralph P Mason
- Department of Radiology , The University of Texas Southwestern Medical Center , 5323 Harry Hines Boulevard , Dallas , Texas 75390-9058 , United States
| | - Mary Lynn Trawick
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place, No. 97348 , Waco , Texas 76798-7348 , United States
| | - Kevin G Pinney
- Department of Chemistry and Biochemistry , Baylor University , One Bear Place, No. 97348 , Waco , Texas 76798-7348 , United States
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4
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Tenneti S, Biswas S, Cox GA, Mans DJ, Lim HJ, RajanBabu TV. Broadly Applicable Stereoselective Syntheses of Serrulatane, Amphilectane Diterpenes, and Their Diastereoisomeric Congeners Using Asymmetric Hydrovinylation for Absolute Stereochemical Control. J Am Chem Soc 2018; 140:9868-9881. [PMID: 30001133 PMCID: PMC6082684 DOI: 10.1021/jacs.8b03549] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A stereogenic center, placed at an exocyclic location next to a chiral carbon in a ring to which it is attached, is a ubiquitous structural motif seen in many bioactive natural products, including di- and triterpenes and steroids. Installation of these centers has been a long-standing problem in organic chemistry. Few classes of compounds illustrate this problem better than serrulatanes and amphilectanes, which carry multiple methyl-bearing exocyclic chiral centers. Nickel-catalyzed asymmetric hydrovinylation (AHV) of vinylarenes and 1,3-dienes such as 1-vinylcycloalkenes provides an exceptionally facile way of introducing these chiral centers. This Article documents our efforts to demonstrate the generality of AHV to access not only the natural products but also their various diastereoisomeric derivatives. Key to success here is the availability of highly tunable phosphoramidite Ni(II) complexes useful for overcoming the inherent selectivity of the chiral intermediates. The yields for hydrovinylation (HV) reactions are excellent, and selectivities are in the range of 92-99% for the desired isomers. Discovery of novel, configurationally fluxional, yet sterically less demanding 2,2'-biphenol-derived phosphoramidite Ni complexes (fully characterized by X-ray) turned out to be critical for success in several HV reactions. We also report a less spectacular yet equally important role of solvents in a metal-ammonia reduction for the installation of a key benzylic chiral center. Starting with simple oxygenated styrene derivatives, we iteratively install the various exocyclic chiral centers present in typical serrulatane [e.g., a (+)- p-benzoquinone natural product, elisabethadione, nor-elisabethadione, helioporin D, a known advanced intermediate for the synthesis of colombiasin and elisapterosin] and amphilectane [e.g., A-F, G-J, and K,L pseudopterosins] derivatives. A concise table showing various synthetic approaches to these molecules is included in the Supporting Information. Our attempts to synthesize a hitherto elusive target, elisabethin A, led to a stereoselective, biomimetic route to pseudopterosin A-F aglycones.
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Affiliation(s)
| | | | | | | | | | - T. V. RajanBabu
- Department of Chemistry and Biochemistry, 100 West 18th Avenue, The Ohio State University, Columbus, Ohio 43210 United States
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5
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Ivanov KL, Villemson EV, Latyshev GV, Bezzubov SI, Majouga AG, Melnikov MY, Budynina EM. Regioselective Hydrogenolysis of Donor–Acceptor Cyclopropanes with Zn-AcOH Reductive System. J Org Chem 2017; 82:9537-9549. [DOI: 10.1021/acs.joc.7b01549] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Konstantin L. Ivanov
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
| | - Elena V. Villemson
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
| | - Gennadij V. Latyshev
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
| | - Stanislav I. Bezzubov
- Kurnakov
Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskiy pr. 31, Moscow 119991, Russia
| | - Alexander G. Majouga
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
- National University of Science and Technology “MISiS”, Leninskiy pr. 4, Moscow 119991, Russia
| | - Mikhail Ya. Melnikov
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
| | - Ekaterina M. Budynina
- Department
of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia
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6
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Yu X, Su F, Liu C, Yuan H, Zhao S, Zhou Z, Quan T, Luo T. Enantioselective Total Syntheses of Various Amphilectane and Serrulatane Diterpenoids via Cope Rearrangements. J Am Chem Soc 2016; 138:6261-70. [DOI: 10.1021/jacs.6b02624] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xuerong Yu
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Fan Su
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Chang Liu
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Haosen Yuan
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Shan Zhao
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhiyao Zhou
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Tianfei Quan
- Peking-Tsinghua
Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Tuoping Luo
- Key
Laboratory of Bioorganic Chemistry and Molecular Engineering, Ministry
of Education and Beijing National Laboratory for Molecular Science,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Peking-Tsinghua
Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
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7
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Herdman CA, Devkota L, Lin CM, Niu H, Strecker TE, Lopez R, Liu L, George CS, Tanpure RP, Hamel E, Chaplin DJ, Mason RP, Trawick ML, Pinney KG. Structural interrogation of benzosuberene-based inhibitors of tubulin polymerization. Bioorg Med Chem 2015; 23:7497-520. [PMID: 26775540 PMCID: PMC4828293 DOI: 10.1016/j.bmc.2015.10.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 10/01/2015] [Accepted: 10/10/2015] [Indexed: 11/16/2022]
Abstract
The discovery of 3-methoxy-9-(30,40,50-trimethoxyphenyl)-6,7-dihydro-5H-benzo[7]annulen-4-ol (a benzosuberene-based analogue referred to as KGP18) was originally inspired by the natural products colchicine and combretastatin A-4 (CA4). The relative structural simplicity and ease of synthesis of KGP18, coupled with its potent biological activity as an inhibitor of tubulin polymerization and its cytotoxicity (in vitro) against human cancer cell lines, has resulted in studies focused on new analogue design and synthesis. Our goal was to probe the relationship of structure to function in this class of anticancer agents. A series of twenty-two new benzosuberene-based analogues of KGP18 was designed and synthesized. These compounds vary in their methoxylation pattern and separately incorporate trifluoromethyl groups around the pendant aryl ring for the evaluation of the effect of functional group modifications on the fused six-membered aromatic ring. In addition, the 8,9-saturated congener of KGP18 has been synthesized to assess the necessity of unsaturation at the carbon atom bearing the pendant aryl ring. Six of the molecules from this benzosuberene-series of compounds were active (IC50 < 5 lM) as inhibitors of tubulin polymerization while four analogues were comparable (IC50 approximately 1 lM) in their tubulin inhibitory activity to CA4 and KGP18. The potency of a bis-trifluoromethyl analogue 74 and the unsaturated KGP18 derivative 73 as inhibitors of tubulin assembly along with their moderate cytotoxicity suggested the potential utility of these compounds as vascular disrupting agents (VDAs) to selectively target microvessels feeding tumors. Accordingly, water-soluble and DMSO-soluble phosphate prodrug salts of each were synthesized for preliminary in vivo studies to assess their potential efficacy as VDAs.
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Affiliation(s)
- Christine A. Herdman
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Laxman Devkota
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Chen-Ming Lin
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Haichan Niu
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Tracy E. Strecker
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Ramona Lopez
- Department of Radiology, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9058, United States
| | - Li Liu
- Department of Radiology, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9058, United States
| | - Clinton S. George
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Rajendra P. Tanpure
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Ernest Hamel
- Screening Technologies Branch, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Frederick National Laboratory for Cancer Research, National Institutes of Health, Frederick, MD 21702, United States
| | - David J. Chaplin
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
- OXiGENE Inc., 701 Gateway Boulevard, Suite 210, South San Francisco, California 94080, United States
| | - Ralph P. Mason
- Department of Radiology, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9058, United States
| | - Mary Lynn Trawick
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Kevin G. Pinney
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
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8
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Marine Diterpenoids as Potential Anti-Inflammatory Agents. Mediators Inflamm 2015; 2015:263543. [PMID: 26538822 PMCID: PMC4619941 DOI: 10.1155/2015/263543] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 07/06/2015] [Indexed: 02/06/2023] Open
Abstract
The inflammatory response is a highly regulated process, and its dysregulation can lead to the establishment of chronic inflammation and, in some cases, to death. Inflammation is the cause of several diseases, including rheumatoid arthritis, inflammatory bowel diseases, multiple sclerosis, and asthma. The search for agents inhibiting inflammation is a great challenge as the inflammatory response plays an important role in the defense of the host to infections. Marine invertebrates are exceptional sources of new natural products, and among those diterpenoids secondary metabolites exhibit notable anti-inflammatory properties. Novel anti-inflammatory diterpenoids, exclusively produced by marine organisms, have been identified and synthetic molecules based on those structures have been obtained. The anti-inflammatory activity of marine diterpenoids has been attributed to the inhibition of Nuclear Factor-κB activation and to the modulation of arachidonic acid metabolism. However, more research is necessary to describe the mechanisms of action of these secondary metabolites. This review is a compilation of marine diterpenoids, mainly isolated from corals, which have been described as potential anti-inflammatory molecules.
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9
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Abstract
The 15 published total syntheses of the pseudopterosins are reviewed, with focus on strategic considerations and an emphasis on ring formation.
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10
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Lorentzen M, Sydnes MO, Jørgensen KB. Enantioselective synthesis of (−)-(1R,2R)-1,2-dihydrochrysene-1,2-diol. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.10.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Tanpure RP, George CS, Strecker TE, Devkota L, Tidmore JK, Lin CM, Herdman CA, MacDonough MT, Sriram M, Chaplin DJ, Trawick ML, Pinney KG. Synthesis of structurally diverse benzosuberene analogues and their biological evaluation as anti-cancer agents. Bioorg Med Chem 2013; 21:8019-32. [PMID: 24183586 PMCID: PMC3968794 DOI: 10.1016/j.bmc.2013.08.035] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 08/10/2013] [Accepted: 08/18/2013] [Indexed: 11/28/2022]
Abstract
Diversely functionalized, fused aryl-alkyl ring systems hold a prominent position as well-established molecular frameworks for a variety of anti-cancer agents. The benzosuberene (6,7 fused, also referred to as dihydro-5H-benzo[7]annulene and benzocycloheptene) ring system has emerged as a valuable molecular core component for the development of inhibitors of tubulin assembly, which function as antiproliferative anti-cancer agents and, in certain cases, as vascular disrupting agents (VDAs). Both a phenolic-based analogue (known as KGP18, compound 39) and its corresponding amine-based congener (referred to as KGP156, compound 45), which demonstrate strong inhibition of tubulin assembly (low micromolar range) and potent cytotoxicity (picomolar range for KGP18 and nanomolar range for KGP156) are noteworthy examples of such benzosuberene-based compounds. In order to extend the structure-activity relationship (SAR) knowledge base related to benzosuberene anti-cancer agents, a series of eleven analogues (including KGP18) were prepared in which the methoxylation pattern on the pendant aryl ring as well as functional group incorporation on the fused aryl ring were varied. The synthetic approach to these compounds featured a sequential Wittig olefination, reduction, Eaton's reagent-mediated cyclization strategy to achieve the core benzosuberone intermediate, and represented a higher-yielding synthesis of KGP18 (which we prepared previously through a ring-expansion strategy). Incorporation of a fluorine or chlorine atom at the 1-position of the fused aryl ring or replacement of one of the methoxy groups with hydrogen (on the pendant aryl ring of KGP18) led to benzosuberene analogues that were both strongly inhibitory against tubulin assembly (IC50 approximately 1.0 μM) and strongly cytotoxic against selected human cancer cell lines (for example, GI50=5.47 nM against NCI-H460 cells with fluoro-benzosuberene analogue 37). A water-soluble phosphate prodrug salt of KGP18 (referred to as KGP265, compound 44) and a water-soluble serinamide salt (compound 48) of KGP156 were also synthesized and evaluated in this study.
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Affiliation(s)
- Rajendra P. Tanpure
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Clinton S. George
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Tracy E. Strecker
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Laxman Devkota
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Justin K. Tidmore
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Chen-Ming Lin
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Christine A. Herdman
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Matthew T. MacDonough
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Madhavi Sriram
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - David J. Chaplin
- OXiGENE Inc., 701 Gateway Boulevard, Suite 210, South San Francisco, California 94080, United States
| | - Mary Lynn Trawick
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
| | - Kevin G. Pinney
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798-7348, United States
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12
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Kawa K, Saitoh T, Kaji E, Nishiyama S. Development of Glycosylation Using the Glucopyranose 1,2-Orthobenzoate under Electrochemical Conditions. Org Lett 2013; 15:5484-7. [DOI: 10.1021/ol4026342] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kohei Kawa
- Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan
| | - Tsuyoshi Saitoh
- Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan
| | - Eisuke Kaji
- Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan
| | - Shigeru Nishiyama
- Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan
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13
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Day DR, Jabaiah S, Jacobs RS, Little RD. Cyclodextrin formulation of the marine natural product pseudopterosin A uncovers optimal pharmacodynamics in proliferation studies of human umbilical vein endothelial cells. Mar Drugs 2013; 11:3258-71. [PMID: 24065164 PMCID: PMC3806459 DOI: 10.3390/md11093258] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Revised: 08/13/2013] [Accepted: 08/14/2013] [Indexed: 11/16/2022] Open
Abstract
Pseudopterosin A (PsA) treatment of growth factor depleted human umbilical vein endothelial cell (HUVEC) cultures formulated in hydroxypropyl-β-cyclodextrin (HPβCD) for 42 h unexpectedly produced a 25% increase in cell proliferation (EC50 = 1.34 × 10−8 M). Analysis of dose response curves revealed pseudo-first order saturation kinetics, and the uncoupling of cytotoxicity from cell proliferation, thereby resulting in a widening of the therapeutic index. The formulation of PsA into HPβCD produced a 200-fold increase in potency over a DMSO formulation; we propose this could result from a constrained presentation of PsA to the receptor, which would limit non-specific binding. These results support the hypothesis that the non-specific receptor binding of PsA when formulated in DMSO has ostensibly masked prior estimates of specific activity, potency, and mechanism. Collectively, these results suggest that the formulation of PsA and compounds of similar chemical properties in HPβCD could result in significant pharmacological findings that may otherwise be obscured when using solvents such as DMSO.
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Affiliation(s)
- Daniel R. Day
- Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106, USA; E-Mails: (D.R.D.); (R.S.J.)
| | - Suraya Jabaiah
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA 93106, USA; E-Mail:
| | - Robert S. Jacobs
- Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106, USA; E-Mails: (D.R.D.); (R.S.J.)
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA 93106, USA; E-Mail:
| | - R. Daniel Little
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-805-893-3693; Fax: +1-805-893-4120
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14
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Lu JM, Perkins MV, Griesser HJ. Total synthesis and structural confirmation of the antibacterial diterpene leubethanol. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.05.082] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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González-Sarrías A, Miguel V, Merino G, Lucas R, Morales JC, Tomás-Barberán F, Alvarez AI, Espín JC. The gut microbiota ellagic acid-derived metabolite urolithin A and its sulfate conjugate are substrates for the drug efflux transporter breast cancer resistance protein (ABCG2/BCRP). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:4352-4359. [PMID: 23586460 DOI: 10.1021/jf4007505] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The breast cancer resistance protein (BCRP/ABCG2) is a drug efflux transporter that can affect the pharmacological and toxicological properties of many molecules. Urolithins, metabolites produced by the gut microbiota from ellagic acid (EA) and ellagitannins, have been acknowledged with in vivo anti-inflammatory and cancer chemopreventive properties. This study evaluated whether urolithins (Uro-A, -B, -C, and -D) and their main phase II metabolites Uro-A sulfate, Uro-A glucuronide, and Uro-B glucuronide as well as their precursor EA were substrates for ABCG2/BCRP. Parental and Bcrp1-transduced MDCKII cells were used for active transport assays. Uro-A and, to a lesser extent, Uro-A sulfate showed a significant increase in apically directed translocation in Bcrp1-transduced cells. Bcrp1 did not show affinity for the rest of the tested compounds. Data were confirmed for murine, human, bovine, and ovine BCRP-transduced subclones as well as with the use of the selective BCRP inhibitor Ko143. The transport inhibition by Uro-A was analyzed by flow cytometry compared to Ko143 using the antineoplastic agent mitoxantrone as a model substrate. Results showed that Uro-A was able to inhibit mitoxantrone transport in a dose-dependent manner. This study reports for the first time that Uro-A and its sulfate conjugate are ABCG2/BCRP substrates. The results suggest that physiologically relevant concentrations of these gut microbiota-derived metabolites could modulate ABCG2/BCRP-mediated transport processes and mechanisms of cancer drug resistance. Further in vivo investigations are warranted.
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Affiliation(s)
- Antonio González-Sarrías
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, Campus de Espinardo, Murcia, Spain
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Tanpure RP, George CS, Sriram M, Strecker TE, Tidmore JK, Hamel E, Charlton-Sevcik AK, Chaplin DJ, Trawick ML, Pinney KG. An Amino-Benzosuberene Analogue That Inhibits Tubulin Assembly and Demonstrates Remarkable Cytotoxicity. MEDCHEMCOMM 2012; 3:720-724. [PMID: 23772309 DOI: 10.1039/c2md00318j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The recent discovery of a small-molecule benzosuberene-based phenol that demonstrates remarkable picomolar cytotoxicity against selected human cancer cell lines and strongly inhibits tubulin polymerization (1-2 µM) inspired the design and synthesis of a variety of new, structurally diverse benzosuberene derivatives. An efficient synthetic route to functionalized benzosuberenes was developed. This methodology utilized a Wittig reaction, followed by a selective alkene reduction and ring-closing cyclization to form the core benzosuberone structure. This synthetic route facilitated the preparation of a 6-nitro-1-(3',4',5'-trimethoxyphenyl) benzosuberene derivative and its corresponding 6-amino analogue in good yield. The 6-amino analogue was a strong inhibitor of tubulin polymerization (1.2 µM), demonstrated enhanced cytotoxicity against the human cancer cell lines examined (GI50 = 33 pM against SK-OV-3 ovarian cancer, for example), and exhibited a concentration dependent disruption of a pre-established capillary-like network of tubules formed from human umbilical vein endothelial cells.
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Affiliation(s)
- Rajendra P Tanpure
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas, 76798-7348, United States
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Berrué F, McCulloch MWB, Kerr RG. Marine diterpene glycosides. Bioorg Med Chem 2011; 19:6702-19. [PMID: 21783368 DOI: 10.1016/j.bmc.2011.06.083] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2011] [Revised: 06/16/2011] [Accepted: 06/28/2011] [Indexed: 10/18/2022]
Abstract
Marine diterpene glycosides (MDGs) respresent a small but highly significant group of the much larger class of marine diterpenes. The three well-studied examples of MDGs are eleutherobins, pseudopterosins and fuscosides, all of which exhibit extremely promising biological activity. The eleutherobins are potent anti-mitotic agents, and the pseudopterosins and fuscosides are potent anti-inflammatory agents. This review discusses the structures and biological activities of these compounds, as well as their biosynthesis and synthesis.
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Affiliation(s)
- Fabrice Berrué
- Department of Chemistry, University of Prince Edward Island, Charlottetown, PEI, Canada
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Flachsmann F, Schellhaas K, Moya CE, Jacobs RS, Fenical W. Synthetic pseudopterosin analogues: A novel class of antiinflammatory drug candidates. Bioorg Med Chem 2010; 18:8324-33. [PMID: 21041093 DOI: 10.1016/j.bmc.2010.09.067] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 09/23/2010] [Accepted: 09/27/2010] [Indexed: 11/15/2022]
Abstract
The synthesis and in vivo anti-inflammatory activity of a series of pseudopterosin analogues are presented. Synthetic tricyclic catechol aglycons with different substitution patterns were monofucosylated or -xylosylated. Anti-inflammatory activity was conserved over a wide range of structural modifications. The most active synthetic compound 33 reduced phorbol myristate acetate (PMA)-induced inflammation in the mouse ear by 72% at 50 μg/ear. This corresponds to 80% of the activity of natural pseudopterosin A.
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Affiliation(s)
- Felix Flachsmann
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California at San Diego, La Jolla, 92093-0204, USA
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Blunt JW, Copp BR, Munro MHG, Northcote PT, Prinsep MR. Marine natural products. Nat Prod Rep 2010; 27:165-237. [DOI: 10.1039/b906091j] [Citation(s) in RCA: 322] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Zhong W, Little RD. Exploration and determination of the redox properties of the pseudopterosin class of marine natural products. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.09.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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