1
|
Nomula R, Pratapure MS, Kontham R. Studies Directed Toward the Total Synthesis of Nannocystin A. ChemistrySelect 2022. [DOI: 10.1002/slct.202203893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rajesh Nomula
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 411008 India
| | - Madhukar S. Pratapure
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Ravindar Kontham
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| |
Collapse
|
2
|
Liniger M, Neuhaus CM, Altmann KH. Ring-Closing Metathesis Approaches towards the Total Synthesis of Rhizoxins. Molecules 2020; 25:E4527. [PMID: 33023218 PMCID: PMC7582377 DOI: 10.3390/molecules25194527] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 09/26/2020] [Accepted: 09/28/2020] [Indexed: 02/01/2023] Open
Abstract
Efforts are described towards the total synthesis of the bacterial macrolide rhizoxin F, which is a potent tubulin assembly and cancer cell growth inhibitor. A significant amount of work was expanded on the construction of the rhizoxin core macrocycle by ring-closing olefin metathesis (RCM) between C(9) and C(10), either directly or by using relay substrates, but in no case was ring-closure achieved. Macrocycle formation was possible by ring-closing alkyne metathesis (RCAM) at the C(9)/C(10) site. The requisite diyne was obtained from advanced intermediates that had been prepared as part of the synthesis of the RCM substrates. While the direct conversion of the triple bond formed in the ring-closing step into the C(9)-C(10) E double bond of the rhizoxin macrocycle proved to be elusive, the corresponding Z isomer was accessible with high selectivity by reductive decomplexation of the biscobalt hexacarbonyl complex of the triple bond with ethylpiperidinium hypophosphite. Radical-induced double bond isomerization, full elaboration of the C(15) side chain, and directed epoxidation of the C(11)-C(12) double bond completed the total synthesis of rhizoxin F.
Collapse
Affiliation(s)
| | | | - Karl-Heinz Altmann
- ETH Zürich, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, 8093 Zürich, Switzerland; (M.L.); (C.M.N.)
| |
Collapse
|
3
|
Cao S, Dong YH, Wang DF, Liu ZP. Tubulin Maytansine Site Binding Ligands and their Applications as MTAs and ADCs for Cancer Therapy. Curr Med Chem 2020; 27:4567-4576. [PMID: 32175831 DOI: 10.2174/0929867327666200316144610] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 02/26/2020] [Accepted: 02/27/2020] [Indexed: 01/08/2023]
Abstract
BACKGROUND Microtubule Targeting Agents (MTAs) represent the most successful anticancer drugs for cancer chemotherapy. Through interfering with the tubulin polymerization and depolymerization dynamics, MTAs influence intracellular transport and cell signal pathways, inhibit cell mitosis and cell proliferation, and induce cell apoptosis and death. The tubulin maytansine site binding agents are natural or nature-derived products that represent one type of the MTAs that inhibit tubulin polymerization and exhibit potent antitumor activity both in vitro and in vivo. They are used as Antibody-Drug Conjugates (ADCs) in cancer chemotherapy. METHODS Using SciFinder® as a tool, the publications about maytansine, its derivatives, maytansine binding site, maytansine site binding agents and their applications as MTAs for cancer therapy were surveyed with an exclusion on those published as patents. The latest progresses in clinical trials were obtained from the clinical trial web. RESULTS This article presents an introduction about MTAs, maytansine, maytansine binding site and its ligands, the applications of these ligands as MTAs and ADCs in cancer therapy. CONCLUSION The maytansine site binding agents are powerful MTAs for cancer chemotherapy. The maytansine site ligands-based ADCs are used in clinic or under clinical trials as cancer targeted therapy to improve their selectivity and to reduce their side effects. Further improvements in the delivery efficiency of the ADCs will benefit the patients in cancer targeted therapy.
Collapse
Affiliation(s)
- Shuo Cao
- Department of Medicinal Chemistry, Faculty of Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Yue-Hui Dong
- Jinan Vocational College of Nursing, Jinan 250102, China
| | - De-Feng Wang
- Department of Medicinal Chemistry, Faculty of Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Zhao-Peng Liu
- Department of Medicinal Chemistry, Faculty of Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| |
Collapse
|
4
|
Anti-tubulin agents of natural origin: Targeting taxol, vinca, and colchicine binding domains. Eur J Med Chem 2019; 171:310-331. [PMID: 30953881 DOI: 10.1016/j.ejmech.2019.03.025] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 03/09/2019] [Accepted: 03/10/2019] [Indexed: 12/24/2022]
Abstract
Microtubules are a protein which is made of α- and β-heterodimer. It is one of the main components of the cell which play a vital role in cell division especially in G2/M-phase. It exists in equilibrium dynamic of polymerization and depolymerization of α- and β-heterodimer. It is one of the best targets for developing anti-cancer drugs. Various natural occurring molecules are well known for their anti-tubulin effect such as vinca, paclitaxel, combretastatin, colchicine etc. These microtubule-targeted drugs are acted through two processes (i) inhibiting depolymerization of tubulin (tubulin stabilizing agents) and (ii) inhibiting polymerization of tubulin (tubulin destabilizing agents). Now days, various binding domains have been explore through which these molecules are binding to tubulin but the three major binding domain of tubulin are taxol, vinca and colchicine binding domain. The present article mainly focus on the classification of various naturally occurring compounds on the basis of their inhibition processes (depolymerization and polymerization) and the site of interaction (targets taxol, vinca and colchicine binding domain) which has been hitherto reported. By placing all the naturally occurring taxol, vinca and colchicine binding site analogues at one place makes a better understanding of the tubulin interactions with known natural tubulin binders that would helps in the discovery of new and potent natural, semi-synthetic and synthetic analogues for treating cancer.
Collapse
|
5
|
Gembus V, Karmazin L, Uguen D, Zoller T. Formal Synthesis of Borrelidin: A Highly Enantio- and Diastereoselective Access to the Morken’s C2–C12 Intermediate. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20180292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Vincent Gembus
- Laboratoire de Synthèse Organique (associé au CNRS; UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg, France
| | - Lydia Karmazin
- Service de Radiocristallographie, Université de Strasbourg, BP296/R8, 67008 Strasbourg, France
| | - Daniel Uguen
- Laboratoire de Synthèse Organique (associé au CNRS; UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg, France
| | - Thomas Zoller
- Laboratoire de Synthèse Organique (associé au CNRS; UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg, France
| |
Collapse
|
6
|
Karier P, Ungeheuer F, Ahlers A, Anderl F, Wille C, Fürstner A. Metathesis at an Implausible Site: A Formal Total Synthesis of Rhizoxin D. Angew Chem Int Ed Engl 2018; 58:248-253. [DOI: 10.1002/anie.201812096] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Pol Karier
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Felix Ungeheuer
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Andreas Ahlers
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Felix Anderl
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Christian Wille
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| |
Collapse
|
7
|
Karier P, Ungeheuer F, Ahlers A, Anderl F, Wille C, Fürstner A. Metathesis at an Implausible Site: A Formal Total Synthesis of Rhizoxin D. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201812096] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Pol Karier
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Felix Ungeheuer
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Andreas Ahlers
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Felix Anderl
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Christian Wille
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| |
Collapse
|
8
|
Friedrich RM, Bell JQ, Garcia A, Shen Z, Friestad GK. Unified Strategy for 1,5,9- and 1,5,7-Triols via Configuration-Encoded 1,5-Polyol Synthesis: Preparation and Coupling of C15-C25 and C26-C40 Fragments of Tetrafibricin. J Org Chem 2018; 83:13650-13669. [PMID: 30372076 DOI: 10.1021/acs.joc.8b02034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Diverse classes of natural products contain chiral 1,5,9- and 1,5,7-triol stereotriads, including the novel fibrinogen receptor antagonist tetrafibricin. Biological activities associated with compounds containing these motifs warrant targeted synthetic strategies to 1,5-polyol families from cheap and easily accessible reagents while avoiding the need to determine configurations at each alcohol stereocenter. In the accompanying paper, we present a solution to these problems via an iterative configuration-encoded strategy that exploits Julia-Kocienski couplings of enantiopure α-silyloxy-γ-sulfononitrile building blocks. The stereocontrol is unambiguous, and the building blocks are available in multigram quantities via asymmetric catalysis. This approach efficiently accessed a C26-C40 subunit of tetrafibricin that contains a syn, syn-1,5,9-triol and all of the stereochemistry and functionality needed to advance toward tetrafibricin. A modification afforded the anti, syn-1,5,7-triol within the C15-C25 fragment of tetrafibricin by merging 1,5-polyol synthesis with diastereoselective intramolecular conjugate addition. The union of the C15-C25 and C26-C40 fragments was achieved via a BF3·OEt2-mediated Mukaiyama aldol construction with high 1,3- anti stereoinduction, revealing some unexpected insights on the impact of silyl protecting groups on 1,3- anti diastereocontrol by a β-siloxyaldehyde aldol acceptor. Directed 1,3- anti reduction completed the stereostructure of the C15-C40 portion of tetrafibricin, with configurations established by a combination of NMR experiments.
Collapse
Affiliation(s)
- Ryan M Friedrich
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | - Jay Q Bell
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | - Alfredo Garcia
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | - Zican Shen
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| | - Gregory K Friestad
- Department of Chemistry , University of Iowa , Iowa City , Iowa 52242 , United States
| |
Collapse
|
9
|
Shrestha ML, Qi W, McIntosh MC. Acyclic 1,4-Stereocontrol via the Allylic Diazene Rearrangement: Development, Applications, and the Essential Role of Kinetic E Stereoselectivity in Tosylhydrazone Formation. J Org Chem 2017; 82:8359-8370. [PMID: 28776373 DOI: 10.1021/acs.joc.7b00428] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report full details of a method for 1,3-reductive transposition of α-alkoxy-α,β-unsaturated hydrazones to provide E-alkenes with high 1,4-stereocontrol between the two respective allylic stereocenters. The process couples a chelation-controlled reduction of the hydrazone with an in situ allylic strain controlled retro-ene reaction of an allyl diazene, i.e., an allylic diazene rearrangement. Such stereotriads are frequently observed motifs in natural products. We observed a fortuitous kinetic preference for the E-hydrazone geometry during the hydrazonation reaction, as only the E-isomers could undergo chelation-controlled reduction.
Collapse
Affiliation(s)
- Maha L Shrestha
- University of Arkansas , 119 Chemistry Bldg, Fayetteville, Arkansas 72701, United States
| | - Wei Qi
- University of Arkansas , 119 Chemistry Bldg, Fayetteville, Arkansas 72701, United States
| | - Matthias C McIntosh
- University of Arkansas , 119 Chemistry Bldg, Fayetteville, Arkansas 72701, United States
| |
Collapse
|
10
|
|
11
|
Abstract
Total synthesis of nannocystin Ax has been accomplished concisely. The key elements in this total synthesis feature Kobayashi's remote asymmetric induction with vinylketene silyl N,O-acetal, Roush's asymmetric crotylboration of aldehyde, Mitsunobu's esterification and macrocyclization via Stille cross-coupling.
Collapse
Affiliation(s)
- Yan-Hui Zhang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- China
| | - Rong Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- China
| |
Collapse
|
12
|
Thiede S, Wosniok PR, Herkommer D, Debnar T, Tian M, Wang T, Schrempp M, Menche D. Total Synthesis of Leupyrrins A1and B1, Highly Potent Antifungal Agents from the MyxobacteriumSorangium cellulosum. Chemistry 2016; 23:3300-3320. [DOI: 10.1002/chem.201604445] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Indexed: 01/17/2023]
Affiliation(s)
- Sebastian Thiede
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Paul R. Wosniok
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Daniel Herkommer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
- Current address: GlaxoSmithKline, Medicines Research Centre; Gunnels Wood Road Stevenage SG1 2NY UK
| | - Thomas Debnar
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
- Current address: Dottikon Exclusive Synthesis AG; Dottikon Switzerland
| | - Maoqun Tian
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
- Current address: Scripps Research Institute; La Jolla USA
| | - Tongtong Wang
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
- Current address: Institute of Quality Standard and Testing Technology for Agro-products; Chinese Academy of Agricultural Sciences; Key Laboratory of Agro-food Safety and Quality; Ministry of Agriculture; Beijing China
| | - Michael Schrempp
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Dirk Menche
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| |
Collapse
|
13
|
|
14
|
Koukal P, Ulč J, Nečas D, Kotora M. Enantioselective Allylation of β-Haloacrylaldehydes: Formal Total Syntheses of Pteroenone and Antillatoxin. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600286] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
15
|
Helfrich EJN, Piel J. Biosynthesis of polyketides by trans-AT polyketide synthases. Nat Prod Rep 2016; 33:231-316. [DOI: 10.1039/c5np00125k] [Citation(s) in RCA: 230] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This review discusses the biosynthesis of natural products that are generated bytrans-AT polyketide synthases, a family of catalytically versatile enzymes that represents one of the major group of proteins involved in the production of bioactive polyketides.
Collapse
Affiliation(s)
- Eric J. N. Helfrich
- Institute of Microbiology
- Eidgenössische Technische Hochschule (ETH) Zurich
- 8093 Zurich
- Switzerland
| | - Jörn Piel
- Institute of Microbiology
- Eidgenössische Technische Hochschule (ETH) Zurich
- 8093 Zurich
- Switzerland
| |
Collapse
|
16
|
Sano K, Kohari Y, Nakano H, Seki C, Takeshita M, Tokiwa M, Hirose Y, Uwai K. Lipase-catalyzed domino Michael–aldol reaction of 2-methyl-1,3-cycloalkanedione and methyl vinyl ketone for the synthesis of bicyclic compounds. SYNTHETIC COMMUN 2015. [DOI: 10.1080/00397911.2015.1116584] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Kaoru Sano
- Division of Applied Sciences, Muroran Institute of Technology, Muroran, Japan
| | - Yoshihito Kohari
- Division of Applied Sciences, Muroran Institute of Technology, Muroran, Japan
| | - Hiroto Nakano
- Division of Applied Sciences, Muroran Institute of Technology, Muroran, Japan
| | - Chigusa Seki
- Division of Applied Sciences, Muroran Institute of Technology, Muroran, Japan
| | | | | | - Yoshihiko Hirose
- Amano Enzyme Inc., Gifu Research and Development Center, Gifu, Japan
| | - Koji Uwai
- Division of Applied Sciences, Muroran Institute of Technology, Muroran, Japan
| |
Collapse
|
17
|
Tang Y, Liu JT, Chen P, Lv MC, Wang ZZ, Huang YK. Protecting-Group-Free Total Synthesis of Aplykurodinone-1. J Org Chem 2014; 79:11729-34. [DOI: 10.1021/jo501684k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yu Tang
- School of Pharmaceutical Science and Technology, Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 P. R. China
| | - Ji-tian Liu
- School of Pharmaceutical Science and Technology, Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 P. R. China
| | - Ping Chen
- School of Pharmaceutical Science and Technology, Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 P. R. China
| | - Ming-can Lv
- School of Pharmaceutical Science and Technology, Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 P. R. China
| | - Zhen-zhen Wang
- School of Pharmaceutical Science and Technology, Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 P. R. China
| | - Yi-kun Huang
- School of Pharmaceutical Science and Technology, Key Laboratory for Modern Drug Delivery & High-Efficiency, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072 P. R. China
| |
Collapse
|
18
|
Davies AT, Pickett PM, Slawin AMZ, Smith AD. Asymmetric Synthesis of Tri- and Tetrasubstituted Trifluoromethyl Dihydropyranones from α-Aroyloxyaldehydes via NHC Redox Catalysis. ACS Catal 2014. [DOI: 10.1021/cs500667g] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Alyn T. Davies
- EaStCHEM,
School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, United Kingdom
| | - Philip M. Pickett
- EaStCHEM,
School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, United Kingdom
| | - Alexandra M. Z. Slawin
- EaStCHEM,
School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, United Kingdom
| | - Andrew D. Smith
- EaStCHEM,
School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, United Kingdom
| |
Collapse
|
19
|
Paterson I, Ng KKH, Williams S, Millican DC, Dalby SM. Total synthesis of the antimitotic marine macrolide (-)-leiodermatolide. Angew Chem Int Ed Engl 2014; 53:2692-5. [PMID: 24481746 PMCID: PMC4499261 DOI: 10.1002/anie.201310164] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Indexed: 11/10/2022]
Abstract
Leiodermatolide is an antimitotic macrolide isolated from the marine sponge Leiodermatium sp. whose potentially novel tubulin-targeting mechanism of action makes it an exciting lead for anticancer drug discovery. In pursuit of a sustainable supply, we report a highly stereocontrolled total synthesis (3.2% yield) based on a convergent sequence of palladium-mediated fragment assembly and macrolactonization. Boron-mediated aldol reactions were used to configure the three key fragments 2, 5, and 6 by employing the appropriate enantiomer of the lactate-derived ketone 7.
Collapse
Affiliation(s)
- Ian Paterson
- University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK) http://www-paterson.ch.cam.ac.uk.
| | | | | | | | | |
Collapse
|
20
|
Paterson I, Ng KKH, Williams S, Millican DC, Dalby SM. Total Synthesis of the Antimitotic Marine Macrolide (−)-Leiodermatolide. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310164] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
21
|
Kretschmer M, Dieckmann M, Li P, Rudolph S, Herkommer D, Troendlin J, Menche D. Modular Total Synthesis of Rhizopodin: A Highly Potent G-Actin Dimerizing Macrolide. Chemistry 2013; 19:15993-6018. [DOI: 10.1002/chem.201302197] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Indexed: 01/13/2023]
|
22
|
Kramer R, Brückner R. Stereocontrolled Synthesis of a Cn-Cn+6Building Block for the Unnatural Enantiomers of Important Polyol,Polyene Antibiotics from an Epoxy Alcohol by a Reduction/Conjugate Addition/Hydroxylation Sequence. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300182] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
23
|
Kumar VP, Chandrasekhar S. Enantioselective Synthesis of Pladienolide B and Truncated Analogues as New Anticancer Agents. Org Lett 2013; 15:3610-3. [DOI: 10.1021/ol401458d] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Vemula Praveen Kumar
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad-500007, India
| | - Srivari Chandrasekhar
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad-500007, India
| |
Collapse
|
24
|
Neuhaus CM, Liniger M, Stieger M, Altmann KH. Total Synthesis of the Tubulin Inhibitor WF-1360F Based on Macrocycle Formation through Ring-Closing Alkyne Metathesis. Angew Chem Int Ed Engl 2013; 52:5866-70. [DOI: 10.1002/anie.201300576] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Indexed: 11/12/2022]
|
25
|
Neuhaus CM, Liniger M, Stieger M, Altmann KH. Totalsynthese des Tubulinhemmers WF-1360F über eine durch Ringschluss-Alkinmetathese vermittelte Makrocyclisierung. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300576] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
26
|
Saraei M, Eftekhari-Sis B, Mozaffarnia S. DABCO-Catalyzed Green Synthesis of 2-Hydroxy-1,4-diones via Direct Aldol Reaction of Arylglyoxals in Water. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2013. [DOI: 10.5012/jkcs.2013.57.2.252] [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]
|
27
|
Fleury LM, Kosal AD, Masters JT, Ashfeld BL. Cooperative titanocene and phosphine catalysis: accelerated C-X activation for the generation of reactive organometallics. J Org Chem 2012; 78:253-69. [PMID: 23094703 DOI: 10.1021/jo301726v] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The study presented herein describes a reductive transmetalation approach toward the generation of Grignard and organozinc reagents mediated by a titanocene catalyst. This method enables the metalation of functionalized substrates without loss of functional group compatibility. Allyl zinc reagents and allyl, vinyl, and alkyl Grignard reagents were generated in situ and used in the addition to carbonyl substrates to provide the corresponding carbinols in yields up to 99%. It was discovered that phosphine ligands effectively accelerate the reductive transmetalation event to enable the metalation of C-X bonds at temperatures as low as -40 °C. Performing the reactions in the presence of chiral diamines and amino alcohols led to the enantioselective allylation of aldehydes.
Collapse
Affiliation(s)
- Lauren M Fleury
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | | | | | | |
Collapse
|
28
|
Clarke PA, Ermanis K. Synthesis of the C20–C32 Tetrahydropyran Core of the Phorboxazoles and the C22 Epimer via a Stereodivergent Michael Reaction. Org Lett 2012; 14:5550-3. [DOI: 10.1021/ol3026523] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul A. Clarke
- Department of Chemistry, University of York, Heslington, York YO10 5DD, United Kingdom
| | - Kristaps Ermanis
- Department of Chemistry, University of York, Heslington, York YO10 5DD, United Kingdom
| |
Collapse
|
29
|
Kuntiyong P, Lee TH, Kranemann CL, White JD. Total synthesis of the marine toxin phorboxazole A using palladium(II)-mediated intramolecular alkoxycarbonylation for tetrahydropyran synthesis. Org Biomol Chem 2012; 10:7884-99. [PMID: 22910851 DOI: 10.1039/c2ob25766a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The potent antitumor agent phorboxazole A was synthesized from six subunits comprising C1-C2 (115), C3-C8 (98), C9-C19 (74), C20-C32 (52), C33-C41 (84) and C42-C46 (85). Tetrahydropyrans B and C containing cis-2,6-disubstitution were fabricated via palladium(II)-mediated intramolecular alkoxycarbonylation which, in the case of tetrahydropyran C, was carried out with catalytic palladium(II) and p-benzoquinone as the stoichiometric re-oxidant. Tetrahydropyran D was obtained by a stereoselective tin(IV)-catalyzed coupling of a C9 aldehyde with an allylsilane, and the C19-C20 connection was made using a completely stereoselective Wittig-Schlosser (E) olefination. Coupling of the oxazole C32 methyl substituent with the intact C33-C46 δ-lactone 3was accompanied by elimination of the vinyl bromide to a terminal alkyne, but the C32-C33 linkage was implemented successfully with 83 and C33-C41 lactone 84. The C42-C46 segment of the side chain was then appended via Julia-Kocienski olefination. The macrolide portion of phorboxazole A was completed by means of an Ando-Still-Gennari intramolecular (Z)-selective olefination at C2-C3 which required placement of a (dimethoxyphosphinyl)acetate moiety at C24. Final deprotection led to phorboxazole A via a route in which the longest linear sequence is 37 steps and the overall yield is 0.36%.
Collapse
Affiliation(s)
- Punlop Kuntiyong
- Department of Chemistry, Oregon State University, Corvallis, Oregon, USA
| | | | | | | |
Collapse
|
30
|
Abstract
The enantioselective synthesis of (-)-dysiherbaine (1) has been established with efficiency via a unique synthetic strategy involving the desymmetrization of 2-substituted glycerol to install a quaternary chiral carbon, which induces further stereochemistry in the bicyclic perhydrofuropyran through mercuriocyclization and epoxidation.
Collapse
|
31
|
Ibrahim AS, Spellberg B, Walsh TJ, Kontoyiannis DP. Pathogenesis of mucormycosis. Clin Infect Dis 2012; 54 Suppl 1:S16-22. [PMID: 22247441 DOI: 10.1093/cid/cir865] [Citation(s) in RCA: 430] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Mucormycosis is a life-threatening infection that occurs in patients who are immunocompromised because of diabetic ketoacidosis, neutropenia, organ transplantation, and/or increased serum levels of available iron. Because of the increasing prevalence of diabetes mellitus, cancer, and organ transplantation, the number of patients at risk for this deadly infection is increasing. Despite aggressive therapy, which includes disfiguring surgical debridement and frequently adjunctive toxic antifungal therapy, the overall mortality rate is high. New strategies to prevent and treat mucormycosis are urgently needed. Understanding the pathogenesis of mucormycosis and the host response to invading hyphae ultimately will provide targets for novel therapeutic interventions. In this supplement, we review the current knowledge about the virulence traits used by the most common etiologic agent of mucormycosis, Rhizopus oryzae. Because patients with elevated serum levels of available iron are uniquely susceptible to mucormycosis and these infections are highly angioinvasive, emphasis is placed on the ability of the organism to acquire iron from the host and on its interactions with endothelial cells lining blood vessels. Several promising therapeutic strategies in preclinical stages are identified.
Collapse
Affiliation(s)
- Ashraf S Ibrahim
- Division of Infectious Diseases, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, University of California-Los Angeles, 1124 W Carson St., Torrance, CA 90502, USA.
| | | | | | | |
Collapse
|
32
|
Fuchs M, Schober M, Pfeffer J, Kroutil W, Birner-Gruenberger R, Faber K. Homoallylic Alcohols via a Chemo-Enzymatic One-Pot Oxidation-Allylation Cascade. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100380] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
33
|
Burghart J, Sorg A, Brückner R. Stereocomplementary Syntheses of 1,ω‐DistannylatedE,Z‐Isomeric Conjugated Trienes, Tetraenes, and Pentaenes. Chemistry 2011; 17:6469-83. [DOI: 10.1002/chem.201001629] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Indexed: 11/09/2022]
Affiliation(s)
- Jochen Burghart
- Carbogen Amcis AG, Hauptstrasse 171, 4416 Bubendorf (Switzerland)
| | - Achim Sorg
- Basic Chemicals Research, SE, GCB/S – M311, BASF AG, 67056 Ludwigshafen (Germany)
| | - Reinhard Brückner
- Institut für Organische Chemie und Biochemie, Universität Freiburg, Albertstraße 21, 79104 Freiburg (Germany), Fax: (+49) 761‐2036100
| |
Collapse
|
34
|
Srivastava VP, Patel R, Yadav LDS. Lewis Acid-Catalyzed Oxidative Allylation: A New Approach for the Synthesis of Homoallylic Alcohols and Amines Directly from Alcohols. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000713] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
35
|
Synthetic studies on the phorboxazoles: a short synthesis of an epi-C23 tetrahydropyran core. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.07.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
36
|
Zhou Q, Chen X, Ma D. Asymmetric, protecting-group-free total synthesis of (-)-englerin A. Angew Chem Int Ed Engl 2010; 49:3513-6. [PMID: 20544902 DOI: 10.1002/anie.201000888] [Citation(s) in RCA: 178] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Qianghui Zhou
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | | | | |
Collapse
|
37
|
Zhou Q, Chen X, Ma D. Asymmetric, Protecting-Group-Free Total Synthesis of (−)-Englerin A. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000888] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
38
|
Morales-Serna JA, Sánchez E, Velázquez R, Bernal J, García-Ríos E, Gaviño R, Negrón-Silva G, Cárdenas J. Highly efficient macrolactonization of ω-hydroxy acids using benzotriazole esters: synthesis of Sansalvamide A. Org Biomol Chem 2010; 8:4940-8. [DOI: 10.1039/c0ob00161a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
39
|
Menche D, Hassfeld J, Li J, Mayer K, Rudolph S. Modular Total Synthesis of Archazolid A and B. J Org Chem 2009; 74:7220-9. [DOI: 10.1021/jo901565n] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dirk Menche
- Institut für Organische Chemie, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg
- Helmholtz-Zentrum für Infektionsforschung, Medizinische Chemie, Inhoffenstrasse 7, D-38124 Braunschweig, Germany
| | - Jorma Hassfeld
- Helmholtz-Zentrum für Infektionsforschung, Medizinische Chemie, Inhoffenstrasse 7, D-38124 Braunschweig, Germany
| | - Jun Li
- Helmholtz-Zentrum für Infektionsforschung, Medizinische Chemie, Inhoffenstrasse 7, D-38124 Braunschweig, Germany
| | - Kerstin Mayer
- Institut für Organische Chemie, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg
| | - Sven Rudolph
- Helmholtz-Zentrum für Infektionsforschung, Medizinische Chemie, Inhoffenstrasse 7, D-38124 Braunschweig, Germany
| |
Collapse
|
40
|
Yan J, Wang L. Asymmetric aldol reactions catalyzed by efficient and recyclable silica-supported proline-based peptides. Chirality 2009; 21:413-20. [PMID: 18570310 DOI: 10.1002/chir.20603] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A series of silica-supported proline-based peptides were synthesized and applied as catalysts for direct asymmetric intermolecular aldol reactions. Among these, a peptide with two L-proline units was found to be the most efficient one for the asymmetric aldol reactions between acetone and aromatic aldehydes. The reactions generated the corresponding products with satisfactory isolated yields (up to 97%) and enantiomeric excesses (up to 96%) in the presence of this catalyst (5 mol %). Furthermore, the silica-supported organocatalyst could be recovered and recycled by a simple filtration of the reaction solution and used for five consecutive trials without loss of its reactivity.
Collapse
Affiliation(s)
- Jincan Yan
- Department of Chemistry, Huaibei Coal Teachers College, Anhui, People's Republic of China
| | | |
Collapse
|
41
|
Ibrahim AS, Gebremariam T, Liu M, Chamilos G, Kontoyiannis D, Mink R, Kwon-Chung KJ, Fu Y, Skory CD, Edwards JE, Spellberg B. Bacterial endosymbiosis is widely present among zygomycetes but does not contribute to the pathogenesis of mucormycosis. J Infect Dis 2008; 198:1083-90. [PMID: 18694335 DOI: 10.1086/591461] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Environmental isolates of the fungus Rhizopus have been shown to harbor a bacterial endosymbiont (Burkholderia) that produces rhixozin, a plant mycotoxin. We sought to define the role of rhizoxin production by endosymbionts in the pathogenesis of mucormycosis. Endosymbiotic bacteria were identified by polymerase chain reaction in 15 (54%) of 28 clinical isolates of Zygomycetes, with 33% of the bacterial strains showing 87% identity to Burkholderia 16S rDNA. The presence of rhizoxin in myclial extracts from fungi harboring bacteria was confirmed by high-performance liquid chromatography analysis. However, fungal strains with or without endosymbionts did not differ in their ability to cause endothelial cell injury in vitro, nor did antibiotic-mediated eradication of endosymbionts and rhizoxin production decrease the virulence of fungal strains in mice or flies. In summary, although bacterial endosymbiosis is widely detected in clinical isolates of Zygomycetes, including Rhizopus oryzae strains, we found no evidence that bacterial endosymbionts and rhizoxin contribute to the pathogenesis of mucormycosis in the models studied.
Collapse
Affiliation(s)
- Ashraf S Ibrahim
- Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA 90502, USA.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Luft JAR, Winkler T, Kessabi FM, Houk KN. Substituent effects on the rearrangements of cyclohexyl to cyclopentyl radicals involving avermectin-related radicals. J Org Chem 2008; 73:8175-81. [PMID: 18842059 DOI: 10.1021/jo800923a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The rearrangement of a substituted cyclohexyl radical to a cyclopentylmethyl radical on the skeleton of avermectin B1 has been investigated using density functional (UB3LYP/6-31G(d)) and G3MP2B3 computational methods. The rearrangement is preferred when highly radical stabilizing groups are present at the 2- and 3-positions of the cyclohexyl radical. A substituent on the 3-position of the cyclohexyl radical enables ring-cleavage of the cyclohexyl radical, while a radical stabilizing substituent on the 2-position of the cyclohexyl radical stabilizes the final cyclopentylmethyl radical, enabling the overall rearrangement and reversing the normal thermodynamic preference for the hexenyl radical ring closure.
Collapse
Affiliation(s)
- Jennifer A R Luft
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, USA
| | | | | | | |
Collapse
|
43
|
Werneburg M, Hertweck C. Chemoenzymatic Total Synthesis of the Antiproliferative Polyketide (+)-(R)-Aureothin. Chembiochem 2008; 9:2064-6. [DOI: 10.1002/cbic.200800301] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
44
|
Loper JE, Henkels MD, Shaffer BT, Valeriote FA, Gross H. Isolation and identification of rhizoxin analogs from Pseudomonas fluorescens Pf-5 by using a genomic mining strategy. Appl Environ Microbiol 2008; 74:3085-93. [PMID: 18344330 PMCID: PMC2394923 DOI: 10.1128/aem.02848-07] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2007] [Accepted: 03/10/2008] [Indexed: 01/10/2023] Open
Abstract
The products synthesized from a hybrid polyketide synthase/nonribosomal peptide synthetase gene cluster in the genome of Pseudomonas fluorescens Pf-5 were identified using a genomics-guided strategy involving insertional mutagenesis and subsequent metabolite profiling. Five analogs of rhizoxin, a 16-member macrolide with antifungal, phytotoxic, and antitumor activities, were produced by Pf-5, but not by a mutant with an insertion in the gene cluster. The five rhizoxin analogs, one of which had not been described previously, were differentially toxic to two agriculturally important plant pathogens, Botrytis cinerea and Phytophthora ramorum. The rhizoxin analogs also caused swelling of rice roots, a symptom characteristic of rhizoxin itself, but were less toxic to pea and cucumber roots. Of the rhizoxin analogs produced by Pf-5, the predominant compound, WF-1360 F, and the newly described compound 22Z-WF-1360 F were most toxic against the two plant pathogens and three plant species. These rhizoxin analogs were tested against a panel of human cancer lines, and they exhibited potent but nonselective cytotoxicity. This study highlights the value of the genomic sequence of the soil bacterium P. fluorescens Pf-5 in providing leads for the discovery of novel metabolites with significant biological properties.
Collapse
Affiliation(s)
- Joyce E Loper
- Horticultural Crops Research Laboratory, Agricultural Research Service, United States Department of Agriculture, Corvallis, Oregon 97330, USA
| | | | | | | | | |
Collapse
|
45
|
Bonazzi S, Güttinger S, Zemp I, Kutay U, Gademann K. Total synthesis, configuration, and biological evaluation of anguinomycin C. Angew Chem Int Ed Engl 2008; 46:8707-10. [PMID: 17918172 DOI: 10.1002/anie.200703134] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Simone Bonazzi
- Chemical Synthesis Laboratory (SB-ISIC-LSYNC), Swiss Federal Institute of Technology (EPFL), 1015 Lausanne, Switzerland
| | | | | | | | | |
Collapse
|
46
|
Bonazzi S, Güttinger S, Zemp I, Kutay U, Gademann K. Totalsynthese, Konfiguration und biologische Evaluierung von Anguinomycin C. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200703134] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
47
|
Mandel AL, Jones BD, La Clair JJ, Burkart MD. A synthetic entry to pladienolide B and FD-895. Bioorg Med Chem Lett 2007; 17:5159-64. [PMID: 17681759 PMCID: PMC2652656 DOI: 10.1016/j.bmcl.2007.06.094] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2007] [Revised: 06/21/2007] [Accepted: 06/28/2007] [Indexed: 11/16/2022]
Abstract
Presented within are syntheses of the pladienolide B and FD-895 side-chains, as well as models of the essential ring-closing metathesis and Stille coupling that will be used to complete their total syntheses. Several analogs of the pladienolide B side-chain were also prepared in order to evaluate the scope of the methodology and to create a library of structures that could be used for stereochemical and SAR analyses.
Collapse
Affiliation(s)
- Alexander L Mandel
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | | | | | | |
Collapse
|
48
|
Negishi EI. Transition Metal-Catalyzed Organometallic Reactions that Have Revolutionized Organic Synthesis. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.233] [Citation(s) in RCA: 220] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
49
|
Chapter 8 Oxazoles and benzoxazoles. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/s1460-1567(07)80057-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
50
|
White JD, Kuntiyong P, Lee TH. Total Synthesis of Phorboxazole A. 1. Preparation of Four Subunits. Org Lett 2006; 8:6039-42. [PMID: 17165924 DOI: 10.1021/ol062530r] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[Structure: see text] Four subunits of the potent antitumor agent phorboxazole A were constructed; fragments C20-C32 and C9-C19 containing tetrahydropyrans A and B, respectively, were assembled using palladium-catalyzed intramolecular alkoxycarbonylation.
Collapse
Affiliation(s)
- James D White
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, USA.
| | | | | |
Collapse
|