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Hwang S, Choi M, Jeong M, Lee C. Synthesis of the C13-C27 Fragment of Madeirolide A Using Visible-Light-Promoted Radical Cyclization. Org Lett 2024; 26:1067-1072. [PMID: 38293710 DOI: 10.1021/acs.orglett.3c04305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
The convergent synthesis of a fully elaborated C13-C27 fragment of madeirolide A has been achieved. The key features of the synthesis include the stereocontrolled construction of both the THF and THP rings via visible-light-induced iridium-catalyzed radical cyclization and the late-stage union of the two oxacyclic subunits through nickel-catalyzed decarboxylative cross-coupling.
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Affiliation(s)
- Sunghyun Hwang
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Minchul Choi
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Myungeun Jeong
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Chulbom Lee
- Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
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2
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Davies-Coleman MT, McPhail KL, Parker-Nance S. A Quarter Century of Marine Biodiscovery in Algoa Bay, South Africa. JOURNAL OF NATURAL PRODUCTS 2023; 86:638-652. [PMID: 36853972 DOI: 10.1021/acs.jnatprod.2c00987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Algoa Bay, the largest crenulate bay on the southeastern coast of South Africa, is currently one of the most well-studied marine ecosystems in southern Africa. A plethora of endemic marine invertebrates inhabits the benthic reefs on the western edge of the Bay in close proximity to South Africa's sixth largest city. Over the past 25 years, South African marine natural products chemists, together with international collaborators from the US National Cancer Institute and other US institutions, have focused their attention on Algoa Bay's benthic marine invertebrates as a potential source of new anticancer compounds. This review commemorates a quarter of a century of marine biodiscovery in Algoa Bay and presents the structures and bioactivities of 49 new and 36 known specialized metabolites isolated from two molluscs, eight ascidians, and six sponges. Thirty-nine of these compounds were cytotoxic to cancer cells in vitro with 20 exhibiting moderate to potent cytotoxicity. Six other compounds exhibited antimicrobial activity. Foremost among the potential anticancer compounds is mandelalide A (38) from the Algoa Bay ascidian Lissoclinum species.
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Affiliation(s)
- Michael T Davies-Coleman
- Department of Chemistry, University of the Western Cape, Bellville, 7535, South Africa and Department of Chemistry, Rhodes University, Makhanda, 6140, South Africa
| | - Kerry L McPhail
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregaon 97331, United States
| | - Shirley Parker-Nance
- South African Environmental Observation Network, Elwandle Coastal Node, Nelson Mandela University, Ocean Sciences Campus, Summerstrand, Gqeberha, 6001, South Africa
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3
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Mattos DR, Wan X, Serrill JD, Nguyen MH, Humphreys IR, Viollet B, Smith AB, McPhail KL, Ishmael JE. The Marine-Derived Macrolactone Mandelalide A Is an Indirect Activator of AMPK. Mar Drugs 2022; 20:md20070418. [PMID: 35877711 PMCID: PMC9320534 DOI: 10.3390/md20070418] [Citation(s) in RCA: 4] [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: 05/13/2022] [Revised: 06/22/2022] [Accepted: 06/22/2022] [Indexed: 02/06/2023] Open
Abstract
The mandelalides are complex macrolactone natural products with distinct macrocycle motifs and a bioactivity profile that is heavily influenced by compound glycosylation. Mandelalides A and B are direct inhibitors of mitochondrial ATP synthase (complex V) and therefore more toxic to mammalian cells with an oxidative metabolic phenotype. To provide further insight into the pharmacology of the mandelalides, we studied the AMP-activated protein kinase (AMPK) energy stress pathway and report that mandelalide A is an indirect activator of AMPK. Wild-type mouse embryonic fibroblasts (MEFs) and representative human non-small cell lung cancer (NSCLC) cells showed statistically significant increases in phospho-AMPK (Thr172) and phospho-ACC (Ser79) in response to mandelalide A. Mandelalide L, which also harbors an A-type macrocycle, induced similar increases in phospho-AMPK (Thr172) and phospho-ACC (Ser79) in U87-MG glioblastoma cells. In contrast, MEFs co-treated with an AMPK inhibitor (dorsomorphin), AMPKα-null MEFs, or NSCLC cells lacking liver kinase B1 (LKB1) lacked this activity. Mandelalide A was significantly more cytotoxic to AMPKα-null MEFs than wild-type cells, suggesting that AMPK activation serves as a protective response to mandelalide-induced depletion of cellular ATP. However, LKB1 status alone was not predictive of the antiproliferative effects of mandelalide A against NSCLC cells. When EGFR status was considered, erlotinib and mandelalide A showed strong cytotoxic synergy in combination against erlotinib-resistant 11-18 NSCLC cells but not against erlotinib-sensitive PC-9 cells. Finally, prolonged exposures rendered mandelalide A, a potent and efficacious cytotoxin, against a panel of human glioblastoma cell types regardless of the underlying metabolic phenotype of the cell. These results add biological relevance to the mandelalide series and provide the basis for their further pre-clinical evaluation as ATP synthase inhibitors and secondary activators of AMPK.
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Affiliation(s)
- Daphne R. Mattos
- Department of Pharmaceutical Sciences, College of Pharmacy, Corvallis, OR 97331, USA; (D.R.M.); (X.W.); (J.D.S.); (I.R.H.); (K.L.M.)
| | - Xuemei Wan
- Department of Pharmaceutical Sciences, College of Pharmacy, Corvallis, OR 97331, USA; (D.R.M.); (X.W.); (J.D.S.); (I.R.H.); (K.L.M.)
| | - Jeffrey D. Serrill
- Department of Pharmaceutical Sciences, College of Pharmacy, Corvallis, OR 97331, USA; (D.R.M.); (X.W.); (J.D.S.); (I.R.H.); (K.L.M.)
| | - Minh H. Nguyen
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, PA 19104, USA; (M.H.N.); (A.B.S.III)
| | - Ian R. Humphreys
- Department of Pharmaceutical Sciences, College of Pharmacy, Corvallis, OR 97331, USA; (D.R.M.); (X.W.); (J.D.S.); (I.R.H.); (K.L.M.)
| | - Benoit Viollet
- CNRS, INSERM, Institut Cochin, Université Paris Cité, F-75014 Paris, France;
| | - Amos B. Smith
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, PA 19104, USA; (M.H.N.); (A.B.S.III)
| | - Kerry L. McPhail
- Department of Pharmaceutical Sciences, College of Pharmacy, Corvallis, OR 97331, USA; (D.R.M.); (X.W.); (J.D.S.); (I.R.H.); (K.L.M.)
| | - Jane E. Ishmael
- Department of Pharmaceutical Sciences, College of Pharmacy, Corvallis, OR 97331, USA; (D.R.M.); (X.W.); (J.D.S.); (I.R.H.); (K.L.M.)
- Correspondence:
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4
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Umemiya S, Terada M. Catalytic Enantioselective Allylation of Acetylenic Aldehydes by Chiral Phosphoric Acid/Transition Metal Cooperative Catalysis: Formal Synthesis of Fostriecin. Org Lett 2021; 23:3767-3771. [PMID: 33890790 DOI: 10.1021/acs.orglett.1c01166] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An enantioselective allylation of silyl-substituted acetylenic aldehydes by chiral phosphoric acid (CPA)/transition metal cooperative catalysis was developed. Enantioenriched homoallylic propargyl alcohols were obtained in good yields with excellent enantioselectivities (>99% ee) under mild conditions. Moreover, the shortest formal synthesis of fostriecin was achieved by the present enantioselective allylation protocol as the key step. The known intermediate of fostriecin reported by McDonald and co-worker was synthesized in only nine steps in 39% total yield.
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Affiliation(s)
- Shigenobu Umemiya
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Masahiro Terada
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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5
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Hubert P, Seibel E, Beemelmanns C, Campagne J, Figueiredo RM. Stereoselective Construction of (
E,Z
)‐1,3‐Dienes and Its Application in Natural Product Synthesis. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000730] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Pierre Hubert
- ICGM Univ Montpellier, CNRS, ENSCM Montpellier France
| | - Elena Seibel
- Hans-Knöll-Institute (HKI) Beutenbergstrasse 11a 07745 Jena Germany
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6
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Natural products and other inhibitors of F 1F O ATP synthase. Eur J Med Chem 2020; 207:112779. [PMID: 32942072 DOI: 10.1016/j.ejmech.2020.112779] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/20/2020] [Accepted: 08/21/2020] [Indexed: 12/19/2022]
Abstract
F1FO ATP synthase is responsible for the production of >95% of all ATP synthesis within the cell. Dysregulation of its expression, activity or localization is linked to various human diseases including cancer, diabetes, and Alzheimer's and Parkinson's disease. In addition, ATP synthase is a novel and viable drug target for the development of antimicrobials as evidenced by bedaquiline, which was approved in 2012 for the treatment of tuberculosis. Historically, natural products have been a rich source of ATP synthase inhibitors that help unravel the role of F1FO ATP synthase in cellular bioenergetics. During the last decade, new modulators of ATP synthase have been discovered through the isolation of novel natural products as well as through a ligand-based drug design process. In addition, new data has been obtained with regards to the structure and function of ATP synthase under physiological and pathological conditions. Crystal structure studies have provided a significant insight into the rotary function of the enzyme and may provide additional opportunities to design a new generation of inhibitors. This review provides an update on recently discovered ATP synthase modulators as well as an update on existing scaffolds.
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7
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Ghosh A, Brueckner AC, Cheong PHY, Carter RG. Second-Generation Synthesis of the Northern Fragment of Mandelalide A: Role of π-Stacking on Sharpless Dihydroxylation of cis-Enynes. J Org Chem 2019; 84:9196-9214. [PMID: 31264876 DOI: 10.1021/acs.joc.9b01153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of a π-stacking-based approach for increased stereoselectivity in Sharpless asymmetric and diastereomeric dihydroxylation of cis-enynes is disclosed. The use of neighboring, electron-rich benzoate esters proved key to the success of this process. Density functional theory study suggests that the substrate benzoate ester group rigidifies the dihydroxylation transition states by forming a favorable π-stacking interaction in both Major-TS and Minor-TS. The energetic preference for the Major-TS was found in part because of the favorable eclipsing conformation of the alkene substituent as opposed to the disfavored bisecting conformation found in the Minor-TS. The application to a second-generation synthesis of the C15-C24 northern portion of mandelalide A is demonstrated.
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Affiliation(s)
- Ankan Ghosh
- Department of Chemistry , Oregon State University , Corvallis , Oregon 97331 , United States
| | - Alexander C Brueckner
- Department of Chemistry , Oregon State University , Corvallis , Oregon 97331 , United States
| | - Paul Ha-Yeon Cheong
- Department of Chemistry , Oregon State University , Corvallis , Oregon 97331 , United States
| | - Rich G Carter
- Department of Chemistry , Oregon State University , Corvallis , Oregon 97331 , United States
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8
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Yamini V, Reddy KM, Krishna AS, Lakshmi JK, Ghosh S. Formal total synthesis of mandelalide A. J CHEM SCI 2019. [DOI: 10.1007/s12039-019-1600-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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9
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Wang M, Bai D, Kong L, Liu B, Li X. Ag(I)-Catalyzed Nucleophilic Addition and Friedel–Crafts Alkylation between α-Oxoketene Dithioacetals and Propargyl Carbonates. Org Lett 2018; 20:7775-7778. [DOI: 10.1021/acs.orglett.8b03180] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Manman Wang
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Dachang Bai
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Lingheng Kong
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Bingxian Liu
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Xingwei Li
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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10
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Dubbu S, Bardhan A, Chennaiah A, Vankar YD. A Cascade of Prins Reaction and Pinacol-Type Rearrangement: Access to 2,3-Dideoxy-3C-Formyl β-C
-Aryl/Alkyl Furanosides and 2-Deoxy-2C-Branched β-C
-Aryl Furanoside. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Sateesh Dubbu
- Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur India
| | - Anirban Bardhan
- Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur India
| | - Ande Chennaiah
- Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur India
| | - Yashwant D. Vankar
- Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur India
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11
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Brito GA, Della-Felice F, Luo G, Burns AS, Pilli RA, Rychnovsky SD, Krische MJ. Catalytic Enantioselective Allylations of Acetylenic Aldehydes via 2-Propanol-Mediated Reductive Coupling. Org Lett 2018; 20:4144-4147. [PMID: 29938513 PMCID: PMC6205292 DOI: 10.1021/acs.orglett.8b01776] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cyclometalated π-allyliridium C,O-benzoates modified by ( S)-SEGPHOS or ( S)-Cl,OMe-BIPHEP catalyze enantioselective 2-propanol-mediated reductive couplings of diverse nonmetallic allyl pronucleophiles with the acetylenic aldehyde TIPSC≡CCHO. Absolute stereochemistries of the resulting secondary homoallylic-propargylic alcohols were assigned using Rychnovsky's competing enantioselective conversion method.
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Affiliation(s)
- Gilmar A Brito
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
- Institute of Chemistry, University of Campinas (UNICAMP) , P.O. Box 6154, CEP, 13083-970 Campinas , São Paulo , Brazil
| | - Franco Della-Felice
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
- Institute of Chemistry, University of Campinas (UNICAMP) , P.O. Box 6154, CEP, 13083-970 Campinas , São Paulo , Brazil
| | - Guoshun Luo
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Alexander S Burns
- Department of Chemistry , University of California at Irvine , 1102 Natural Sciences II , Irvine , California 92697 , United States
| | - Ronaldo A Pilli
- Institute of Chemistry, University of Campinas (UNICAMP) , P.O. Box 6154, CEP, 13083-970 Campinas , São Paulo , Brazil
| | - Scott D Rychnovsky
- Department of Chemistry , University of California at Irvine , 1102 Natural Sciences II , Irvine , California 92697 , United States
| | - Michael J Krische
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
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12
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Dyer LA, Philbin CS, Ochsenrider KM, Richards LA, Massad TJ, Smilanich AM, Forister ML, Parchman TL, Galland LM, Hurtado PJ, Espeset AE, Glassmire AE, Harrison JG, Mo C, Yoon S, Pardikes NA, Muchoney ND, Jahner JP, Slinn HL, Shelef O, Dodson CD, Kato MJ, Yamaguchi LF, Jeffrey CS. Modern approaches to study plant–insect interactions in chemical ecology. Nat Rev Chem 2018. [DOI: 10.1038/s41570-018-0009-7] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Watters DJ. Ascidian Toxins with Potential for Drug Development. Mar Drugs 2018; 16:E162. [PMID: 29757250 PMCID: PMC5983293 DOI: 10.3390/md16050162] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 05/05/2018] [Accepted: 05/10/2018] [Indexed: 12/17/2022] Open
Abstract
Ascidians (tunicates) are invertebrate chordates, and prolific producers of a wide variety of biologically active secondary metabolites from cyclic peptides to aromatic alkaloids. Several of these compounds have properties which make them candidates for potential new drugs to treat diseases such as cancer. Many of these natural products are not produced by the ascidians themselves, rather by their associated symbionts. This review will focus mainly on the mechanism of action of important classes of cytotoxic molecules isolated from ascidians. These toxins affect DNA transcription, protein translation, drug efflux pumps, signaling pathways and the cytoskeleton. Two ascidian compounds have already found applications in the treatment of cancer and others are being investigated for their potential in cancer, neurodegenerative and other diseases.
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Affiliation(s)
- Dianne J Watters
- School of Environment and Science, Griffith University, Brisbane, Queensland 4111, Australia.
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14
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Bourkhis M, Gaspard H, Rullière P, de Almeida DKC, Listunov D, Joly E, Abderrahim R, de Mattos MC, de Oliveira MCF, Maraval V, Chauvin R, Génisson Y. Skeletal Optimization of Cytotoxic Lipidic Dialkynylcarbinols. ChemMedChem 2018; 13:1124-1130. [PMID: 29603643 DOI: 10.1002/cmdc.201800118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/22/2018] [Indexed: 11/07/2022]
Abstract
In line with a recent study of the pharmacological potential of bioinspired synthetic acetylenic lipids, after identification of the terminal dialkynylcarbinol (DAC) and butadiynyl alkynylcarbinol (BAC) moieties as functional antitumor pharmacophoric units, this work specifically addresses the issue of carbon backbone length. A systematic variation of the aliphatic chain length was thus carried out in both the DAC and BAC series. The critical impact of the length of the lipidic skeleton was first confirmed in the racemic series, with the highest cytotoxic activity observed for C17 to C18 backbones. Enantiomerically enriched samples were prepared by asymmetric synthesis of the optimal C18 DAC and C17 BAC derivatives. Samples with upgraded enantiomeric purity were alternatively produced by enzymatic kinetic resolution. Eutomers possessing the S configuration displayed cytotoxicity IC50 values as low as 15 nm against HCT116 cancer cells, the highest level of activity reached to date in this series.
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Affiliation(s)
- Maroua Bourkhis
- SPCMIB, UMR-CNRS 5068, Université Paul Sabatier-Toulouse III, 118 route de Narbonne, 31062, Toulouse Cedex 9, France.,05/UR/13-01, LPMLNMH, Carthage University, Faculty of Sciences of Bizerte, 7021, Jarzouna, Tunisia
| | - Hafida Gaspard
- SPCMIB, UMR-CNRS 5068, Université Paul Sabatier-Toulouse III, 118 route de Narbonne, 31062, Toulouse Cedex 9, France
| | - Pauline Rullière
- SPCMIB, UMR-CNRS 5068, Université Paul Sabatier-Toulouse III, 118 route de Narbonne, 31062, Toulouse Cedex 9, France
| | - Diana K C de Almeida
- Laboratory of Biotechnology and Organic Synthesis, Federal University of Ceará, Campus do Pici, Fortaleza, Ceará, Brazil
| | - Dymytrii Listunov
- SPCMIB, UMR-CNRS 5068, Université Paul Sabatier-Toulouse III, 118 route de Narbonne, 31062, Toulouse Cedex 9, France.,LCC-CNRS, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Etienne Joly
- Institute of Pharmacology and Structural Biology, UMR5089 CNRS/UPS, Department of Structural Biology and Biophysics, Université Paul Sabatier-Toulouse III, 205 route de Narbonne, 31077, Toulouse Cedex 4, France
| | - Raoudha Abderrahim
- 05/UR/13-01, LPMLNMH, Carthage University, Faculty of Sciences of Bizerte, 7021, Jarzouna, Tunisia
| | - Marcos C de Mattos
- Laboratory of Biotechnology and Organic Synthesis, Federal University of Ceará, Campus do Pici, Fortaleza, Ceará, Brazil
| | - Maria C F de Oliveira
- Laboratory of Biotechnology and Organic Synthesis, Federal University of Ceará, Campus do Pici, Fortaleza, Ceará, Brazil
| | - Valérie Maraval
- LCC-CNRS, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Remi Chauvin
- LCC-CNRS, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Yves Génisson
- SPCMIB, UMR-CNRS 5068, Université Paul Sabatier-Toulouse III, 118 route de Narbonne, 31062, Toulouse Cedex 9, France
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15
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Nguyen MH, Imanishi M, Kurogi T, Wan X, Ishmael JE, McPhail KL, Smith AB. Synthetic Access to the Mandelalide Family of Macrolides: Development of an Anion Relay Chemistry Strategy. J Org Chem 2018; 83:4287-4306. [PMID: 29480727 PMCID: PMC5910188 DOI: 10.1021/acs.joc.8b00268] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The mandelalides comprise a family of structurally complex marine macrolides that display significant cytotoxicity against several human cancer cell lines. Presented here is a full account on the development of an Anion Relay Chemistry (ARC) strategy for the total synthesis of (-)-mandelalides A and L, the two most potent members of the mandelalide family. The design and implementation of a three-component type II ARC/cross-coupling protocol and a four-component type I ARC union permits rapid access respectively to the key tetrahydrofuran and tetrahydropyran structural motifs of these natural products. Other highlights of the synthesis include an osmium-catalyzed oxidative cyclization of an allylic 1,3-diol, a mild Yamaguchi esterification to unite the northern and southern hemispheres, and a late-stage Heck macrocyclization. Synthetic mandelalides A and L displayed potent cytotoxicity against human HeLa cervical cancer cells (EC50, 1.3 and 3.1 nM, respectively). This synthetic approach also provides access to several highly potent non-natural mandelalide analogs, including a biotin-tagged mandelalide probe for future biological investigation.
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Affiliation(s)
- Minh H. Nguyen
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - Masashi Imanishi
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - Taichi Kurogi
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - Xuemei Wan
- Department of Pharmaceutical Sciences, Oregon State University, Corvallis, OR 97331, United States
| | - Jane E. Ishmael
- Department of Pharmaceutical Sciences, Oregon State University, Corvallis, OR 97331, United States
| | - Kerry L. McPhail
- Department of Pharmaceutical Sciences, Oregon State University, Corvallis, OR 97331, United States
| | - Amos B. Smith
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, PA 19104, United States
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16
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Corrado ML, Knaus T, Mutti FG. A Chimeric Styrene Monooxygenase with Increased Efficiency in Asymmetric Biocatalytic Epoxidation. Chembiochem 2018; 19:679-686. [PMID: 29378090 PMCID: PMC5900736 DOI: 10.1002/cbic.201700653] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Indexed: 11/23/2022]
Abstract
The styrene monooxygenase (SMO) system from Pseudomonas sp. consists of two enzymes (StyA and StyB). StyB catalyses the reduction of FAD at the expense of NADH. After the transfer of FADH2 from StyB to StyA, reaction with O2 generates FAD-OOH, which is the epoxidising agent. The wastage of redox equivalents due to partial diffusive transfer of FADH2 , the insolubility of recombinant StyB and the impossibility of expressing StyA and StyB in a 1:1 molar ratio reduce the catalytic efficiency of the natural system. Herein we present a chimeric SMO (Fus-SMO) that was obtained by genetic fusion of StyA and StyB through a flexible linker. Thanks to a combination of: 1) balanced and improved expression levels of reductase and epoxidase units, and 2) intrinsically higher specific epoxidation activity of Fus-SMO in some cases, Escherichia coli cells expressing Fus-SMO possess about 50 % higher activity for the epoxidation of styrene derivatives than E. coli cells coexpressing StyA and StyB as discrete enzymes. The epoxidation activity of purified Fus-SMO was up to three times higher than that of the two-component StyA/StyB (1:1, molar ratio) system and up to 110 times higher than that of the natural fused SMO. Determination of coupling efficiency and study of the influence of O2 pressure were also performed. Finally, Fus-SMO and formate dehydrogenase were coexpressed in E. coli and applied as a self-sufficient biocatalytic system for epoxidation on greater than 500 mg scale.
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Affiliation(s)
- Maria L. Corrado
- Van't Hoff Institute for Molecular SciencesHIMS-BiocatUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
| | - Tanja Knaus
- Van't Hoff Institute for Molecular SciencesHIMS-BiocatUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
| | - Francesco G. Mutti
- Van't Hoff Institute for Molecular SciencesHIMS-BiocatUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
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17
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Kirmse-Doyle- and Stevens-Type Rearrangements of Glutarate-Derived Oxonium Ylides. Chemistry 2018; 24:3209-3217. [DOI: 10.1002/chem.201704624] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Indexed: 11/07/2022]
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18
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2016. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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19
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Abstract
Covering: 2016. Previous review: Nat. Prod. Rep., 2017, 34, 235-294This review covers the literature published in 2016 for marine natural products (MNPs), with 757 citations (643 for the period January to December 2016) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1277 in 432 papers for 2016), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
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20
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Increased Biosynthetic Gene Dosage in a Genome-Reduced Defensive Bacterial Symbiont. mSystems 2017; 2:mSystems00096-17. [PMID: 29181447 PMCID: PMC5698493 DOI: 10.1128/msystems.00096-17] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 10/18/2017] [Indexed: 12/31/2022] Open
Abstract
Secondary metabolites, which are small-molecule organic compounds produced by living organisms, provide or inspire drugs for many different diseases. These natural products have evolved over millions of years to provide a survival benefit to the producing organism and often display potent biological activity with important therapeutic applications. For instance, defensive compounds in the environment may be cytotoxic to eukaryotic cells, a property exploitable for cancer treatment. Here, we describe the genome of an uncultured symbiotic bacterium that makes such a cytotoxic metabolite. This symbiont is losing genes that do not endow a selective advantage in a hospitable host environment. Secondary metabolism genes, however, are repeated multiple times in the genome, directly demonstrating their selective advantage. This finding shows the strength of selective forces in symbiotic relationships and suggests that uncultured bacteria in such relationships should be targeted for drug discovery efforts. A symbiotic lifestyle frequently results in genome reduction in bacteria; the isolation of small populations promotes genetic drift and the fixation of deletions and deleterious mutations over time. Transitions in lifestyle, including host restriction or adaptation to an intracellular habitat, are thought to precipitate a wave of sequence degradation events and consequent proliferation of pseudogenes. We describe here a verrucomicrobial symbiont of the tunicate Lissoclinum sp. that appears to be undergoing such a transition, with low coding density and many identifiable pseudogenes. However, despite the overall drive toward genome reduction, this symbiont maintains seven copies of a large polyketide synthase (PKS) pathway for the mandelalides (mnd), cytotoxic compounds that likely constitute a chemical defense for the host. There is evidence of ongoing degradation in a small number of these repeats—including variable borders, internal deletions, and single nucleotide polymorphisms (SNPs). However, the gene dosage of most of the pathway is increased at least 5-fold. Correspondingly, this single pathway accounts for 19% of the genome by length and 25.8% of the coding capacity. This increased gene dosage in the face of generalized sequence degradation and genome reduction suggests that mnd genes are under strong purifying selection and are important to the symbiotic relationship. IMPORTANCE Secondary metabolites, which are small-molecule organic compounds produced by living organisms, provide or inspire drugs for many different diseases. These natural products have evolved over millions of years to provide a survival benefit to the producing organism and often display potent biological activity with important therapeutic applications. For instance, defensive compounds in the environment may be cytotoxic to eukaryotic cells, a property exploitable for cancer treatment. Here, we describe the genome of an uncultured symbiotic bacterium that makes such a cytotoxic metabolite. This symbiont is losing genes that do not endow a selective advantage in a hospitable host environment. Secondary metabolism genes, however, are repeated multiple times in the genome, directly demonstrating their selective advantage. This finding shows the strength of selective forces in symbiotic relationships and suggests that uncultured bacteria in such relationships should be targeted for drug discovery efforts. Author Video: An author video summary of this article is available.
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21
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Nazari M, Serrill JD, Wan X, Nguyen MH, Anklin C, Gallegos DA, Smith AB, Ishmael JE, McPhail KL. New Mandelalides Expand a Macrolide Series of Mitochondrial Inhibitors. J Med Chem 2017; 60:7850-7862. [PMID: 28841379 DOI: 10.1021/acs.jmedchem.7b00990] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Mandelalides A-D (1-4) are macrocyclic polyketides known to have an unusual bioactivity profile influenced by compound glycosylation and growth phase of cultured cells. The isolation and characterization of additional natural congeners, mandelalides E-L (5-12), and the supply of synthetic compounds 1 and 12, as well as seco-mandelalide A methyl ester (13), have now facilitated mechanism of action and structure-activity relationship studies. Glycosylated mandelalides are effective inhibitors of aerobic respiration in living cells. Macrolides 1 and 2 inhibit mitochondrial function similar to oligomycin A and apoptolidin A, selective inhibitors of the mammalian ATP synthase (complex V). 1 inhibits ATP synthase activity from isolated mitochondria and triggers caspase-dependent apoptosis in HeLa cells, which are more sensitive to inhibition by 1 in the presence of the glycolysis inhibitor 2-deoxyglucose. Thus, mandelalide cytotoxicity depends on basal metabolic phenotype; cells with an oxidative phenotype are most likely to be inhibited by the mandelalides.
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Affiliation(s)
- Mohamad Nazari
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University , Corvallis, Oregon 97331, United States
| | - Jeffrey D Serrill
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University , Corvallis, Oregon 97331, United States
| | - Xuemei Wan
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University , Corvallis, Oregon 97331, United States
| | - Minh H Nguyen
- Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104-6323, United States
| | - Clemens Anklin
- Bruker BioSpin , 15 Fortune Drive, Billerica, Massachusetts 01821, United States
| | - David A Gallegos
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University , Corvallis, Oregon 97331, United States
| | - Amos B Smith
- Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104-6323, United States
| | - Jane E Ishmael
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University , Corvallis, Oregon 97331, United States
| | - Kerry L McPhail
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University , Corvallis, Oregon 97331, United States
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22
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AnkiReddy P, AnkiReddy S, Sabitha G. Synthetic Studies toward the Revised Aglycone of Mandelalide A. ChemistrySelect 2017. [DOI: 10.1002/slct.201601076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Praveen AnkiReddy
- Natural Products Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 607 India
| | - Sandeep AnkiReddy
- Natural Products Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 607 India
| | - Gowravaram Sabitha
- Natural Products Chemistry Division; CSIR-Indian Institute of Chemical Technology; Hyderabad 500 607 India
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23
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Feng J, Kasun ZA, Krische MJ. Enantioselective Alcohol C-H Functionalization for Polyketide Construction: Unlocking Redox-Economy and Site-Selectivity for Ideal Chemical Synthesis. J Am Chem Soc 2016; 138:5467-78. [PMID: 27113543 PMCID: PMC4871165 DOI: 10.1021/jacs.6b02019] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The development and application of stereoselective and site-selective catalytic methods that directly convert lower alcohols to higher alcohols are described. These processes merge the characteristics of transfer hydrogenation and carbonyl addition, exploiting alcohols and π-unsaturated reactants as redox pairs, which upon hydrogen transfer generate transient carbonyl-organometal pairs en route to products of C-C coupling. Unlike classical carbonyl additions, stoichiometric organometallic reagents and discrete alcohol-to-carbonyl redox reactions are not required. Additionally, due to a kinetic preference for primary alcohol dehydrogenation, the site-selective modification of glycols and higher polyols is possible, streamlining or eliminating use of protecting groups. The total syntheses of several iconic type I polyketide natural products were undertaken using these methods. In each case, the target compounds were prepared in significantly fewer steps than previously achieved.
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Affiliation(s)
- Jiajie Feng
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Zachary A. Kasun
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
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24
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Affiliation(s)
- Sunghyun Hwang
- Department
of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Inhwan Baek
- Department
of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Chulbom Lee
- Department
of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
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25
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Watanabe K, Li J, Veerasamy N, Ghosh A, Carter RG. Stereoselective, Ag-Catalyzed Cyclizations To Access Polysubstituted Pyran Ring Systems: Synthesis of C1-C12 Subunit of Madeirolide A. Org Lett 2016; 18:1744-7. [PMID: 27031993 DOI: 10.1021/acs.orglett.6b00414] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The exploration into the scope of a silver-catalyzed cyclization (AgCC) of propargyl benzoates for accessing pyran ring systems has been reported. The impact of the degree of substitution, nature of the substitution on the carbon backbone/benzoate moiety, and stereochemistry has been evaluated. The application of this methodology to the synthesis of the C1-C12 southern fragment of madeirolide A is disclosed.
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Affiliation(s)
- Kazuhiro Watanabe
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Jinming Li
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Nagarathanam Veerasamy
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Ankan Ghosh
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Rich G Carter
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97331, United States
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26
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Nguyen MH, Imanishi M, Kurogi T, Smith AB. Total Synthesis of (-)-Mandelalide A Exploiting Anion Relay Chemistry (ARC): Identification of a Type II ARC/CuCN Cross-Coupling Protocol. J Am Chem Soc 2016; 138:3675-8. [PMID: 26954306 PMCID: PMC4819492 DOI: 10.1021/jacs.6b01731] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Indexed: 11/28/2022]
Abstract
Anion relay chemistry (ARC), an effective, multicomponent union tactic, was successfully employed for the total synthesis of the highly cytotoxic marine macrolide (-)-mandelalide A (1). The northern hemisphere was constructed via a new type II ARC/CuCN cross-coupling tactic, while the southern hemisphere was secured via a highly efficient four-component type I ARC union. Importantly, the synthesis of 1 showcases ARC as a rapid, scalable coupling strategy for the union of simple readily available building blocks to access diverse complex molecular fragments with excellent stereochemical control.
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Affiliation(s)
- Minh H. Nguyen
- Department of Chemistry,
Laboratory for Research on the Structure of Matter, and Monell Chemical
Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Masashi Imanishi
- Department of Chemistry,
Laboratory for Research on the Structure of Matter, and Monell Chemical
Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Taichi Kurogi
- Department of Chemistry,
Laboratory for Research on the Structure of Matter, and Monell Chemical
Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Amos B. Smith
- Department of Chemistry,
Laboratory for Research on the Structure of Matter, and Monell Chemical
Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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27
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Nazari M, Serrill JD, Sikorska J, Ye T, Ishmael JE, McPhail KL. Discovery of Mandelalide E and Determinants of Cytotoxicity for the Mandelalide Series. Org Lett 2016; 18:1374-7. [DOI: 10.1021/acs.orglett.6b00308] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mohamad Nazari
- Department
of Pharmaceutical Sciences, Oregon State University, 203 Pharmacy
Building, Corvallis, Oregon 97331-4003, United States
| | - Jeffrey D. Serrill
- Department
of Pharmaceutical Sciences, Oregon State University, 203 Pharmacy
Building, Corvallis, Oregon 97331-4003, United States
| | - Justyna Sikorska
- Department
of Pharmaceutical Sciences, Oregon State University, 203 Pharmacy
Building, Corvallis, Oregon 97331-4003, United States
| | - Tao Ye
- Laboratory
of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School Xili, Nanshan District, Shenzhen 518055, China
| | - Jane E. Ishmael
- Department
of Pharmaceutical Sciences, Oregon State University, 203 Pharmacy
Building, Corvallis, Oregon 97331-4003, United States
| | - Kerry L. McPhail
- Department
of Pharmaceutical Sciences, Oregon State University, 203 Pharmacy
Building, Corvallis, Oregon 97331-4003, United States
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28
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Ferreira LA, Schrekker HS. Augmentation of productivity in olefin cross-metathesis: maleic acid does the trick! Catal Sci Technol 2016. [DOI: 10.1039/c6cy01181k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Why use the protected esters when the free acids result in better catalytic performances?
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Affiliation(s)
- Leonildo A. Ferreira
- Laboratory of Technological Processes and Catalysis
- Institute of Chemistry
- Universidade Federal do Rio Grande do Sul
- Porto Alegre
- Brazil
| | - Henri S. Schrekker
- Laboratory of Technological Processes and Catalysis
- Institute of Chemistry
- Universidade Federal do Rio Grande do Sul
- Porto Alegre
- Brazil
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