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Guo W, Hori M, Ogura Y, Nishimura K, Oki K, Ikai T, Yashima E, Ishihara K. Tandem Isomerization/α,β-Site-Selective and Enantioselective Addition Reactions of N-(3-Butynoyl)-3,5-dimethylpyrazole Induced by Chiral π-Cu(II) Catalysts. J Am Chem Soc 2023; 145:27080-27088. [PMID: 38032102 PMCID: PMC10722507 DOI: 10.1021/jacs.3c10820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 12/01/2023]
Abstract
Allenes are important building blocks, and derivatization of products via cycloadditions of allenes could become a powerful strategy for constructing carbocyclic and heterocyclic rings. However, the development of catalytic site-selective and enantioselective cycloaddition reactions of allenes still presents significant challenges. Here, we report chiral π-Cu(II)-complex-catalyzed isomerization of N-(3-butynoyl)-3,5-dimethyl-1H-pyrazole to generate N-allenoylpyrazole in situ and subsequent α,β-site-selective and enantioselective [3 + 2], [4 + 2], or [2 + 2] cycloaddition or conjugate addition reactions. The asymmetric environment created by the intramolecular π-Cu(II) interactions provides the corresponding adducts in moderate to high yield with excellent enantioselectivity. To the best of our knowledge, this is the first successful method for chiral-Lewis-acid-catalyzed tandem isomerization/α,β-site-selective and enantioselective cycloaddition or conjugate addition reactions of latent non-γ-substituted allenoyl derivative.
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Affiliation(s)
- Weiwei Guo
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Masahiro Hori
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Yoshihiro Ogura
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuki Nishimura
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kosuke Oki
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Tomoyuki Ikai
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Eiji Yashima
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate
School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
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Parammal A, Singh S, Kumar M, Xavier JS, Subramanian P. Robust Synthesis of Terpenoid Scaffolds under Mn(I)-Catalysis. J Org Chem 2023. [PMID: 37463248 DOI: 10.1021/acs.joc.3c00816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
The 6/6/5-fused tricyclic scaffold is a central feature of structurally complex terpenoid natural products. A step-economical cascade transformation that leads to a complex molecular skeleton is regarded as a sustainable methodology. Therefore, we report the first Mn(I)-catalyzed C(sp2)-H chemoselective in situ dienylation and diastereoselective intramolecular Diels-Alder reaction using iso-pentadienyl carbonate to access 6/6/5-fused tricyclic scaffolds. To the best of our knowledge, there is no such report thus far to utilize iso-pentadienyl carbonate as a substrate in C-H activation catalysis. Extensive mechanistic studies, such as the isolation of catalytically active organo-manganese(I) complexes, 1,3-dienyl-intermediates, and isotopic labeling experiments have supported the proposed mechanism of this cascade reaction.
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Affiliation(s)
- Athira Parammal
- Indian Institution of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Shubham Singh
- Indian Institution of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Manoj Kumar
- Indian Institution of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Joe Sam Xavier
- Indian Institution of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
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Lefranc F, Koutsaviti A, Ioannou E, Kornienko A, Roussis V, Kiss R, Newman D. Algae metabolites: from in vitro growth inhibitory effects to promising anticancer activity. Nat Prod Rep 2019; 36:810-841. [PMID: 30556575 DOI: 10.1039/c8np00057c] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Covering: 1957 to 2017 Algae constitute a heterogeneous group of eukaryotic photosynthetic organisms, mainly found in the marine environment. Algae produce numerous metabolites that help them cope with the harsh conditions of the marine environment. Because of their structural diversity and uniqueness, these molecules have recently gained a lot of interest for the identification of medicinally useful agents, including those with potential anticancer activities. In the current review, which is not a catalogue-based one, we first highlight the major biological events that lead to various types of cancer, including metastatic ones, to chemoresistance, thus to any types of current anticancer treatment relating to the use of chemotherapeutics. We then review algal metabolites for which scientific literature reports anticancer activity. Lastly, we focus on algal metabolites with promising anticancer activity based on their ability to target biological characteristics of cancer cells responsible for poor treatment outcomes. Thus, we highlight compounds that have, among others, one or more of the following characteristics: selectivity in reducing the proliferation of cancer cells over normal ones, potential for killing cancer cells through non-apoptotic signaling pathways, ability to circumvent MDR-related efflux pumps, and activity in vivo in relevant pre-clinical models.
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Affiliation(s)
- Florence Lefranc
- Service de Neurochirurgie, Hôpital Erasme, ULB, 1070 Brussels, Belgium.
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4
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Eskandani M, Vandghanooni S, Barar J, Nazemiyeh H, Omidi Y. Cell physiology regulation by hypoxia inducible factor-1: Targeting oxygen-related nanomachineries of hypoxic cells. Int J Biol Macromol 2017; 99:46-62. [DOI: 10.1016/j.ijbiomac.2016.10.113] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 10/26/2016] [Indexed: 12/27/2022]
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Harizani M, Ioannou E, Roussis V. The Laurencia Paradox: An Endless Source of Chemodiversity. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2016; 102:91-252. [PMID: 27380407 DOI: 10.1007/978-3-319-33172-0_2] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Nature, the most prolific source of biological and chemical diversity, has provided mankind with treatments for health problems since ancient times and continues to be the most promising reservoir of bioactive chemicals for the development of modern drugs. In addition to the terrestrial organisms that still remain a promising source of new bioactive metabolites, the marine environment, covering approximately 70% of the Earth's surface and containing a largely unexplored biodiversity, offers an enormous resource for the discovery of novel compounds. According to the MarinLit database, more than 27,000 metabolites from marine macro- and microorganisms have been isolated to date providing material and key structures for the development of new products in the pharmaceutical, food, cosmeceutical, chemical, and agrochemical sectors. Algae, which thrive in the euphotic zone, were among the first marine organisms that were investigated as sources of food, nutritional supplements, soil fertilizers, and bioactive metabolites.Red algae of the genus Laurencia are accepted unanimously as one of the richest sources of new secondary metabolites. Their cosmopolitan distribution, along with the chemical variation influenced to a significant degree by environmental and genetic factors, have resulted in an endless parade of metabolites, often featuring multiple halogenation sites.The present contribution, covering the literature until August 2015, offers a comprehensive view of the chemical wealth and the taxonomic problems currently impeding chemical and biological investigations of the genus Laurencia. Since mollusks feeding on Laurencia are, in many cases, bioaccumulating, and utilize algal metabolites as chemical weaponry against natural enemies, metabolites of postulated dietary origin of sea hares that feed on Laurencia species are also included in the present review. Altogether, 1047 secondary metabolites, often featuring new carbocyclic skeletons, have been included.The chapter addresses: (1) the "Laurencia complex", the botanical description and the growth and population dynamics of the genus, as well as its chemical diversity and ecological relations; (2) the secondary metabolites, which are organized according to their chemical structures and are classified into sesquiterpenes, diterpenes, triterpenes, acetogenins, indoles, aromatic compounds, steroids, and miscellaneous compounds, as well as their sources of isolation which are depicted in tabulated form, and (3) the biological activity organized according to the biological target and the ecological functions of Laurencia metabolites.
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Affiliation(s)
- Maria Harizani
- Department of Pharmacognosy and Chemistry of Natural Products, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens, 15771, Greece
| | - Efstathia Ioannou
- Department of Pharmacognosy and Chemistry of Natural Products, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens, 15771, Greece.
| | - Vassilios Roussis
- Department of Pharmacognosy and Chemistry of Natural Products, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens, 15771, Greece.
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Plumet J, Roscales S. Terpenoids Bearing the 7-Oxabicyclo[2.2.1]heptane (7-Oxanorbornane) Skeleton. Natural Sources, Biological Activities and Chemical Synthesis. HETEROCYCLES 2015. [DOI: 10.3987/rev-14-sr(k)3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Jiménez-Romero C, Mayer AMS, Rodríguez AD. Dactyloditerpenol acetate, a new prenylbisabolane-type diterpene from Aplysia dactylomela with significant in vitro anti-neuroinflammatory activity. Bioorg Med Chem Lett 2014; 24:344-8. [PMID: 24279991 PMCID: PMC4249741 DOI: 10.1016/j.bmcl.2013.11.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 11/02/2013] [Accepted: 11/05/2013] [Indexed: 11/26/2022]
Abstract
A new regular diterpene possessing an unusual 1,6-anti-3-methylcyclohex-2-en-1-ol ring system, dactyloditerpenol acetate (1), has been extracted from the tropical sea hare Aplysia dactylomela and its stereostructure elucidated by spectroscopic methods. The absolute configuration of 1 was determined as 1S, 6S, 7R, 10S, and 11R by application of Kishi's method for the assignment of absolute configuration of alcohols. The new diterpene potently inhibited in vitro thromboxane B2 (TXB2) (IC50 0.4μM) and superoxide anion (O2(-)) (IC50 1μM) generation from Escherichia coli lipopolysaccharide (LPS)-activated rat neonatal microglia, with concomitant low short-term toxicity.
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Affiliation(s)
- Carlos Jiménez-Romero
- Department of Chemistry, University of Puerto Rico, PO Box 23346, UPR Station, San Juan, PR 00931-3346, United States
| | - Alejandro M S Mayer
- Department of Pharmacology, Chicago College of Osteopathic Medicine, Midwestern University, 555, 31st Street, Downers Grove, IL 60515, United States
| | - Abimael D Rodríguez
- Department of Chemistry, University of Puerto Rico, PO Box 23346, UPR Station, San Juan, PR 00931-3346, United States.
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8
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Chittiboyina AG, Peddikotla P, Avery MA, Khan IA. Directed hydrogenation of acyclic homoallylic alcohols: enantioselective syntheses of (+)- and (-)-laurenditerpenol. J Org Chem 2013; 78:9223-32. [PMID: 23985032 DOI: 10.1021/jo401461x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Laurenditerpenol is the first marine natural product shown to inhibit hypoxia-inducible factor 1 (HIF-1) activation. Preclinical studies support that the inhibition of HIF-1 is one of the molecular targets for antitumor drug discovery. The synthetically challenging molecular architecture of laurenditerpenol, its absolute stereostructure, and the biological activity of several diastereoisomers were accomplished by our group in 2007 by diastereoselective synthesis. Herein, we report enantioselective syntheses of both enantiomers of laurenditerpenol involving sequential Michael addition and remote homoallylic hydroxyl group-directed asymmetric hydrogenation at ambient temperature and pressure as key reaction steps. The current approach is elegant and overall more efficient than the ones previously reported in the literature.
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Affiliation(s)
- Amar G Chittiboyina
- National Center for Natural Products Research, ‡Department of Medicinal Chemistry, and §Department of Pharmacognosy, School of Pharmacy, University of Mississippi , University, Mississippi 38677, United States
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Wang YQ, Miao ZH. Marine-derived angiogenesis inhibitors for cancer therapy. Mar Drugs 2013; 11:903-33. [PMID: 23502698 PMCID: PMC3705379 DOI: 10.3390/md11030903] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 02/25/2013] [Accepted: 03/01/2013] [Indexed: 12/18/2022] Open
Abstract
Angiogenesis inhibitors have been successfully used for cancer therapy in the clinic. Many marine-derived natural products and their analogues have been reported to show antiangiogenic activities. Compared with the drugs in the clinic, these agents display interesting characteristics, including diverse sources, unique chemical structures, special modes of action, and distinct activity and toxicity profiles. This review will first provide an overview of the current marine-derived angiogenesis inhibitors based on their primary targets and/or mechanisms of action. Then, the marine-derived antiangiogenic protein kinase inhibitors will be focused on. And finally, the clinical trials of the marine-derived antiangiogenic agents will be discussed, with special emphasis on their application potentials, problems and possible coping strategies in their future development as anticancer drugs.
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Affiliation(s)
- Ying-Qing Wang
- Division of Antitumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China.
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10
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Pitsinos EN, Athinaios N, Vidali VP. Enantioselective Total Synthesis of (−)-Laurenditerpenol. Org Lett 2012; 14:4666-9. [DOI: 10.1021/ol302106y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Nikolaos Athinaios
- NCSR “Demokritos”, P.O. Box 60228, GR-153 10 Ag. Paraskevi, Athens, Greece
| | - Veroniki P. Vidali
- NCSR “Demokritos”, P.O. Box 60228, GR-153 10 Ag. Paraskevi, Athens, Greece
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11
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Nagle DG, Zhou YD. Mechanism-based Screening for Cancer Therapeutics with Examples from the Discovery of Marine Natural Product-based HIF-1 Inhibitors. HANDBOOK OF MARINE NATURAL PRODUCTS 2012. [PMCID: PMC7119942 DOI: 10.1007/978-90-481-3834-0_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Recent advances in cancer genetics combined with an increasing number of new methods in molecular and cell biology provide exciting new antitumor drug targets and a wide array of means to design bioassay systems for the discovery of novel cancer chemotherapeutics. Marine natural products continue to play a vital role in molecular-targeted antitumor drug discovery. Although most recognize the critical and expanding role mechanism-based antitumor bioassays play in modern anticancer drug discovery, few natural products chemists have specific training in bioassay technology. Critical bioassay development factors are outlined and introduced at a level intended to provide a basic understanding to a general audience. These include molecular target identification, antitumor target validation, selection of assayable biochemical processes, data acquisition methods, experimental controls, bioassay validation and statistical methods, experimental artifacts, active compound identification, and the dereplication of nuisance compounds. Marine natural products have been identified that inhibit the activation of the anticancer drug target hypoxia-inducible factor-1 (HIF-1). Bioassay systems and recent results from marine HIF-1 inhibitor discovery programs are used to illustrate important factors that must be considered when using molecular-targeted antitumor bioassay methods.
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Mahdi F, Falkenberg M, Ioannou E, Roussis V, Zhou YD, Nagle DG. Thyrsiferol Inhibits Mitochondrial Respiration and HIF-1 Activation. PHYTOCHEMISTRY LETTERS 2011; 4:75-78. [PMID: 21785662 PMCID: PMC3139250 DOI: 10.1016/j.phytol.2010.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The cytotoxic marine red algal metabolite thyrsiferol (1) was found to inhibit hypoxia-induced hypoxia-inducible factor-1 (HIF-1) activation in T47D human breast tumor cells (66% inhibition at 3 μM). Compound 1 also suppressed hypoxic induction of HIF-1 target genes (VEGF, GLUT-1) at the mRNA level, and displayed tumor cell line-selective time-dependent inhibition of cell viability/proliferation. Mechanistic studies revealed that 1 selectively suppressed mitochondrial respiration at Complex I (IC(50) 3 μM). Thyrsiferol represents a prototypical, structurally unique electron transport chain inhibitor. The apparent rotenone-like activity may contribute to the observed cytotoxicity of 1 and play an important role in Laurencia chemical defense.
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Affiliation(s)
- Fakhri Mahdi
- Department of Pharmacognosy, School of Pharmacy, University of Mississippi, University, MS 38677, United States
| | - Miriam Falkenberg
- Department of Pharmacognosy and Chemistry of Natural Products, School of Pharmacy, University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece
- Programa de Pós-graduação em Farmácia, Universidade Federal de Santa Catarina, Campus Trindade, 88040-970 Florianópolis, Brazil
| | - Efstathia Ioannou
- Department of Pharmacognosy and Chemistry of Natural Products, School of Pharmacy, University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece
| | - Vassilios Roussis
- Department of Pharmacognosy and Chemistry of Natural Products, School of Pharmacy, University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece
| | - Yu-Dong Zhou
- Department of Pharmacognosy, School of Pharmacy, University of Mississippi, University, MS 38677, United States
| | - Dale G. Nagle
- Department of Pharmacognosy, School of Pharmacy, University of Mississippi, University, MS 38677, United States
- Research Institute of Pharmaceutical Sciences, University of Mississippi, University, MS 38677, United States
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Gong YD, Kang NS. A Novel 3-Phenylethynyl-2-yl-oxy Quinoxaline Core Skeleton and Pharmacophore Model as a Hypoxia-inducible Factor Inhibitor. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.11.3441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Bhatnagar I, Kim SK. Marine antitumor drugs: status, shortfalls and strategies. Mar Drugs 2010; 8:2702-20. [PMID: 21116415 PMCID: PMC2993001 DOI: 10.3390/md8102702] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Revised: 09/17/2010] [Accepted: 10/13/2010] [Indexed: 01/15/2023] Open
Abstract
Cancer is considered as one of the deadliest diseases in the medical field. Apart from the preventive therapies, it is important to find a curative measure which holds no loopholes and acts accurately and precisely to curb cancer. Over the past few decades, there have been advances in this field and there are many antitumor compounds available on the market, which are of natural as well as synthetic origin. Marine chemotherapy is well recognized nowadays and profound development has been achieved by researchers to deal with different molecular pathways of tumors. However, the marine environment has been less explored for the production of safe and novel antitumor compounds. The reason is a number of shortfalls in this field. Though ample reviews cover the importance and applications of various anticancerous compounds from marine natural products, in the present review, we have tried to bring the current status of antitumor research based on marine inhibitors of cancer signaling pathways. In addition, focus has been placed on the shortfalls and probable strategies in the arena of marine antitumor drug discovery.
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Affiliation(s)
- Ira Bhatnagar
- Department of Chemistry, Pukyong National University, Busan 608-737, Korea; E-Mail:
| | - Se-Kwon Kim
- Department of Chemistry, Pukyong National University, Busan 608-737, Korea; E-Mail:
- Marine Bioprocess Research Center, Pukyong National University, Busan 608-737, Korea
- * Author to whom correspondence should be addressed; E-Mail: ; Tel: +82-51-629-7097, Fax: +82-51-629-7099
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Li Y, Cheng K, Lu X, Sun J. A Facile and Efficient Approach to
N
‐Protected‐β‐Sulfinyl‐ enamines
via C
‐Sulfinylation of Enamides and Enecarbamates. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000084] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yinhui Li
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China, Fax: (+86)‐28‐8522‐2753
- Graduate School of Chinese Academy of Sciences, Beijing 100080, People's Republic of China
| | - Ke Cheng
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China, Fax: (+86)‐28‐8522‐2753
- Graduate School of Chinese Academy of Sciences, Beijing 100080, People's Republic of China
| | - Xiaoxia Lu
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China, Fax: (+86)‐28‐8522‐2753
| | - Jian Sun
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China, Fax: (+86)‐28‐8522‐2753
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16
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Gong YD, Kang NS. A Novel Phenylimidazo[1,2-α]pyridine Core Skeleton and Pharmacophore Model as Hypoxia-Inducible Factor Inhibitors. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.7.2039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Mukherjee S, Scopton AP, Corey EJ. Enantioselective pathway for the synthesis of laurenditerpenol. Org Lett 2010; 12:1836-8. [PMID: 20337419 DOI: 10.1021/ol1004802] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Simple enantioselective routes to the two key intermediates shown above (at center) for the synthesis of laurenditerpenol have been developed using a Diels-Alder step and the same catalyst system for each.
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Affiliation(s)
- Santanu Mukherjee
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA
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18
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Jung ME, Im GYJ. Total synthesis of racemic laurenditerpenol, an HIF-1 inhibitor. J Org Chem 2010; 74:8739-53. [PMID: 19863119 DOI: 10.1021/jo902029x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The convergent total synthesis of the HIF-1 inhibitor laurenditerpenol 1 and its diastereomer 1' is reported. The key step involves the Julia-Kocienski olefination-reduction process between the sulfone 55 and the aldehyde 54. The unusual trimethylated oxanorbornane sulfone 55 was successfully synthesized from the known exo Diels-Alder adduct 24 of 2,5-dimethylfuran 7 and maleic anhydride 23 in 8 steps. The aldehyde 54 was prepared by ring-opening and elaboration of lactone 41. In addition, four analogues of 1 were also successfully synthesized for biological testing.
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Affiliation(s)
- Michael E Jung
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90064-1569, USA.
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Nagle DG, Zhou YD. Marine Natural Products as Inhibitors of Hypoxic Signaling in Tumors. PHYTOCHEMISTRY REVIEWS : PROCEEDINGS OF THE PHYTOCHEMICAL SOCIETY OF EUROPE 2009; 8:415-429. [PMID: 20622986 PMCID: PMC2901131 DOI: 10.1007/s11101-009-9120-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Marine natural products have become a major source of new chemical entities in the discovery of potential anticancer agents that potently suppress various antitumor molecular targets. As a consequence of insufficient vascularization, hypoxic regions form within rapidly growing solid tumor masses. Specific alterations of gene expression in these hypoxic tumor cells help facilitate the survival and metastatic spread of solid tumors. The transcriptional response to cellular hypoxia is primarily mediated by the transcription factor hypoxia-inducible factor-1 (HIF-1) that regulates the expression of more than 100 genes involved in cellular adaptation and survival under hypoxic stress. Clinical studies in cancer patients indicate that HIF-1 activation is directly correlated with advanced disease stages and treatment resistance. HIF-1 has emerged as an important tumor-selective molecular target for anticancer drug discovery. As a result, natural product-based inhibitors of HIF-1 activation have been identified from plants and microorganisms. Recently, structurally unique natural products from marine sponges, crinoids, and algae have been identified as HIF-1 activation inhibitors. The US National Cancer Institute's Open Repository of marine invertebrate and algae extracts has proven to be a valuable source of natural product HIF-1 inhibitors. Among the active compounds identified, certain marine natural products have also been shown to suppress the hypoxic induction of HIF-1 target genes such as vascular endothelial growth factor (VEGF). Some of these marine HIF-1 inhibitors act by interfering with the generation of mitochondrial signaling molecules in hypoxic cells. However, the precise mechanisms of action for many newly identified marine natural product HIF-1 inhibitors remain unresolved.
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Affiliation(s)
- Dale G. Nagle
- Author for correspondence: Tel.: +1-602-915-7026; Fax +1-602-915-6975;
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Liu Y, Liu R, Mao SC, Morgan JB, Jekabsons MB, Zhou YD, Nagle DG. Molecular-targeted antitumor agents. 19. Furospongolide from a marine Lendenfeldia sp. sponge inhibits hypoxia-inducible factor-1 activation in breast tumor cells. JOURNAL OF NATURAL PRODUCTS 2008; 71:1854-60. [PMID: 18989978 PMCID: PMC2893247 DOI: 10.1021/np800342s] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
A natural product chemistry-based approach was employed to discover small-molecule inhibitors of the important tumor-selective molecular target hypoxia-inducible factor-1 (HIF-1). Bioassay-guided isolation of an active lipid extract of a Saipan collection of the marine sponge Lendenfeldia sp. afforded the terpene-derived furanolipid furospongolide as the primary inhibitor of hypoxia-induced HIF-1 activation (IC(50) 2.9 μM, T47D breast tumor cells). The active component of the extract also contained one new cytotoxic scalarane sesterterpene and two previously reported scalaranes. Furospongolide blocked the induction of the downstream HIF-1 target secreted vascular endothelial growth factor (VEGF) and was shown to suppress HIF-1 activation by inhibiting the hypoxic induction of HIF-1α protein. Mechanistic studies indicate that furospongolide inhibits HIF-1 activity primarily by suppressing tumor cell respiration via the blockade of NADH-ubiquinone oxidoreductase (complex I)-mediated mitochondrial electron transfer.
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Affiliation(s)
- Yang Liu
- Department of Pharmacognosy and Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
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Jung ME, Im GYJ. Convergent total synthesis of the racemic HIF-1 inhibitor laurenditerpenol. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.05.116] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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