1
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Isak D, Schwartz LA, Schulthoff S, Pérez-Moreno G, Bosch-Navarrete C, González-Pacanowska D, Fürstner A. Collective and Diverted Total Synthesis of the Strasseriolides: A Family of Macrolides Endowed with Potent Antiplasmodial and Antitrypanosomal Activity. Angew Chem Int Ed Engl 2024; 63:e202408725. [PMID: 38864359 DOI: 10.1002/anie.202408725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 06/11/2024] [Accepted: 06/12/2024] [Indexed: 06/13/2024]
Abstract
The strasseriolide macrolides show promising in vitro and in vivo activities against P. falciparum and T. cruzi, the parasites causing malaria and Chagas disease, respectively. However, the as yet poor understanding of structure/activity relationships and the fact that one family member proved systemically toxic for unknown reasons render a more detailed assessment of these potential lead compounds difficult. To help overcome these issues, a collective total synthesis was devised. The key steps consisted of a ring closing alkyne metathesis (RCAM) reaction to forge a common macrocyclic intermediate followed by a hydroxy-directed ruthenium catalyzed trans-hydrostannation of the propargyl alcohol site thus formed. The resulting alkenyltin derivative served as the central node of the synthesis blueprint, which could be elaborated into the natural products themselves as well as into a set of non-natural analogues according to the concept of diverted total synthesis. The recorded biological data confirmed the potency of the compounds and showed the lack of any noticeable cytotoxicity. The "northern" allylic alcohol subunit was recognized as an integral part of the pharmacophore, yet it provides opportunities for chemical modification.
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Affiliation(s)
- Daniel Isak
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| | - Leyah A Schwartz
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| | - Saskia Schulthoff
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| | - Guiomar Pérez-Moreno
- Instituto de Parasitologia y Biomedicina "López-Neyra", Consejo Superior de Investigaciones Científicas, Avenida del Conocimiento 17 18016, Armilla, Granada, Spain
| | - Cristina Bosch-Navarrete
- Instituto de Parasitologia y Biomedicina "López-Neyra", Consejo Superior de Investigaciones Científicas, Avenida del Conocimiento 17 18016, Armilla, Granada, Spain
| | - Dolores González-Pacanowska
- Instituto de Parasitologia y Biomedicina "López-Neyra", Consejo Superior de Investigaciones Científicas, Avenida del Conocimiento 17 18016, Armilla, Granada, Spain
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
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2
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Coelho F, Saidjalolov S, Moreau D, Thorn-Seshold O, Matile S. Inhibition of Cell Motility by Cell-Penetrating Dynamic Covalent Cascade Exchangers: Integrins Participate in Thiol-Mediated Uptake. JACS AU 2023; 3:1010-1016. [PMID: 37124287 PMCID: PMC10131202 DOI: 10.1021/jacsau.3c00113] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/05/2023] [Accepted: 04/05/2023] [Indexed: 05/03/2023]
Abstract
Integrins are cell surface proteins responsible for cell motility. Inspired by the rich disulfide exchange chemistry of integrins, we show here the inhibition of cell migration by cascade exchangers (CAXs), which also enable and inhibit cell penetration by thiol-mediated uptake. Fast-moving CAXs such as reversible Michael acceptor dimers, dithiabismepanes, and bioinspired epidithiodiketopiperazines are best, much better than Ellman's reagent. The implication that integrins participate in thiol-mediated uptake is confirmed by reduced uptake in integrin-knockdown cells. Although thiol-mediated uptake is increasingly emerging as a unifying pathway to bring matter into cells, its molecular basis is essentially unknown. These results identify the integrin superfamily as experimentally validated general cellular partners in the dynamic covalent exchange cascades that are likely to account for thiol-mediated uptake. The patterns identified testify to the complexity of the dynamic covalent networks involved. This work also provides chemistry tools to explore cell motility and expands the drug discovery potential of CAXs from antiviral toward antithrombotic and antitumor perspectives.
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Affiliation(s)
- Filipe Coelho
- Department
of Organic Chemistry, University of Geneva, 1211 Geneva, Switzerland
| | | | - Dimitri Moreau
- Department
of Biochemistry, University of Geneva, 1211 Geneva, Switzerland
| | - Oliver Thorn-Seshold
- Department
of Pharmacy, Ludwig-Maximilians University
of Munich, 81377 Munich, Germany
| | - Stefan Matile
- Department
of Biochemistry, University of Geneva, 1211 Geneva, Switzerland
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3
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Hu C, Mena J, Alabugin IV. Design principles of the use of alkynes in radical cascades. Nat Rev Chem 2023:10.1038/s41570-023-00479-w. [PMID: 37117812 DOI: 10.1038/s41570-023-00479-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2023] [Indexed: 03/30/2023]
Abstract
One of the simplest organic functional groups, the alkyne, offers a broad canvas for the design of cascade transformations in which up to three new bonds can be added to each of the two sterically unencumbered, energy-rich carbon atoms. However, kinetic protection provided by strong π-orbital overlap makes the design of new alkyne transformations a stereoelectronic puzzle, especially on multifunctional substrates. This Review describes the electronic properties contributing to the unique utility of alkynes in radical cascades. We describe how to control the selectivity of alkyne activation by various methods, from dynamic covalent chemistry with kinetic self-sorting to disappearing directing groups. Additionally, we demonstrate how the selection of reactive intermediates directly influences the propagation and termination of the cascade. Diverging from a common departure point, a carefully planned reaction route can allow access to a variety of products.
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4
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Spohr S, Fürstner A. Studies toward Providencin: The Furanyl-Cyclobutanol Segment. Org Lett 2023; 25:1536-1540. [PMID: 36847332 PMCID: PMC10012265 DOI: 10.1021/acs.orglett.3c00327] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Indexed: 03/01/2023]
Abstract
The furanocembranoid providencin remains an unconquered bastion, although the synthesis of 17-deoxyprovidencin─lacking a single -OH group─has been accomplished in the past. This paper describes a practical approach to a properly hydroxylated building block via an iridium-catalyzed photosensitized intramolecular [2 + 2] cycloaddition as the key step. While an attempt to convert this compound into providencin via RCAM failed, it might well be elaborated into the natural product by adopting the literature route.
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Affiliation(s)
- Simon
M. Spohr
- Max-Planck-Institut
für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Alois Fürstner
- Max-Planck-Institut
für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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5
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Zachmann R, Yahata K, Holzheimer M, Jarret M, Wirtz C, Fürstner A. Total Syntheses of Nominal and Actual Prorocentin. J Am Chem Soc 2023; 145:2584-2595. [PMID: 36652728 PMCID: PMC9896551 DOI: 10.1021/jacs.2c12529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The dinoflagellate-derived polyether prorocentin is a co-metabolite of the archetypical serine/threonine phosphatase inhibitor okadaic acid. Whereas a structural relationship cannot be missed and a biosynthetic link was proposed, it is currently unknown whether there is any parallel in the bioactivity profile of these natural products. However, it was insinuated in the past that the structure assigned to prorocentin might need to be revised. Indeed, re-examination of the published spectra cast doubts as to the constitution of the fused/spirotricyclic BCD-ring system in the core. To clarify this issue, a flexible synthesis blueprint was devised that allowed us to obtain the originally proposed structure as well as the most plausible amended structure. The key to success was late-stage gold-catalyzed spirocyclization reactions that furnished the isomeric central segments with excellent selectivity. The lexicon of catalytic transformations used to make the required cyclization precursors comprised a titanium-mediated ester methylenation/metathesis cascade, a rare example of a gold-catalyzed allylic substitution, and chain extensions via organocatalytic asymmetric aldehyde propargylation. A wing sector to be attached to the isomeric cores was obtained by Krische allylation, followed by a superbly selective cobalt-catalyzed oxidative cyclization of the resulting di-unsaturated alcohol with the formation of a 2,5-trans-disubstituted tetrahydrofuran; the remaining terminal alkene was elaborated into an appropriate handle for fragment coupling by platinum-catalyzed asymmetric diboration/oxidation. The assembly of the different building blocks to the envisaged isomeric target compounds proved that the structure of prorocentin needs to be revised as disclosed herein.
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6
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Späth G, Fürstner A. Total Synthesis of Mycinamicin IV as Integral Part of a Collective Approach to Macrolide Antibiotics. Chemistry 2022; 28:e202104400. [PMID: 34910333 PMCID: PMC9305142 DOI: 10.1002/chem.202104400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Indexed: 11/09/2022]
Abstract
The total synthesis of the 16-membered macrolide mycinamicin IV is outlined, which complements our previously disclosed, largely catalysis-based route to the aglycone. This work must also be seen in the context of our recent conquest of aldgamycin N, a related antibiotic featuring a similar core but a distinctly different functionalization pattern. Taken together, these projects prove that the underlying blueprint is integrative and hence qualifies for a collective approach to this prominent class of natural products. In both cases, the final glycosylation phase mandated close attention and was accomplished only after robust de novo syntheses of the (di)deoxy sugars of the desosamine, chalcose, mycinose and aldgarose types had been established. Systematic screening of the glycosidation promoter was also critically important for success.
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Affiliation(s)
- Georg Späth
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
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7
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Khademi Z, Heravi MM. Applications of Claisen condensations in total synthesis of natural products. An old reaction, a new perspective. Tetrahedron 2022. [DOI: 10.1016/j.tet.2021.132573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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8
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Schulz S, Poth D, Peram PS, Hötling S, Menke M, Melnik K, Röpke R. Chemical Diversity of Volatile Macrocylic Lactones from Frogs. Synlett 2021. [DOI: 10.1055/a-1381-2881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractFor a long time, frogs were believed to communicate primarily via the acoustic channel, but during the last decades it became obvious that various lineages also use chemical communication. In this Account we present our research on the identification of volatile lactones from Madagascan Mantellidae and African Hyperoliidae frogs. Both possess male specific glands that can disseminate a range of volatile compounds. Key constituents are macrocyclic lactones. They show high variability in structure and occurrence. We focus here on the synthetic approaches we have used to clarify constitution and configuration of the glandular compounds. Key synthetic methods are ring-closing metathesis and nucleophilic epoxide opening. Often, but not always, the natural compounds occurs in amounts that excludes their investigation by NMR spectroscopy. Instead, we use GC/MS analysis, GC/IR, microreactions, and synthesis to identify such components. Several aspects of our work will be described giving some insight in our scientific approach.1 Introduction2 Macrocylic Lactones from the Fatty Acid Biosynthetic Pathway3 Unsaturated Lactones4 Terpenoid Lactones5 Macrolide Occurrence6 Conclusions
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9
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Abstract
![]()
For numerous enabling features and strategic virtues, contemporary
alkyne metathesis is increasingly recognized as a formidable synthetic
tool. Central to this development was the remarkable evolution of
the catalysts during the past decades. Molybdenum alkylidynes carrying
(tripodal) silanolate ligands currently set the standards; their functional
group compatibility is exceptional, even though they comprise an early
transition metal in its highest oxidation state. Their performance
is manifested in case studies in the realm of dynamic covalent chemistry,
advanced applications to solid-phase synthesis, a revival of transannular
reactions, and the assembly of complex target molecules at sites,
which one may not intuitively trace back to an acetylenic ancestor.
In parallel with these innovations in material science and organic
synthesis, new insights into the mode of action of the most advanced
catalysts were gained by computational means and the use of unconventional
analytical tools such as 95Mo and 183W NMR spectroscopy.
The remaining shortcomings, gaps, and desiderata in the field are
also critically assessed.
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Affiliation(s)
- Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
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10
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Majhi S. Applications of Yamaguchi Method to Esterification and Macrolactonization in Total Synthesis of Bioactive Natural Products. ChemistrySelect 2021. [DOI: 10.1002/slct.202100206] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Sasadhar Majhi
- Department of Chemistry (UG & PG) Triveni Devi Bhalotia College Raniganj Kazi Nazrul University West Bengal 713347 India
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11
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Jafarizadeh T, Hayati P, Neyrizi HZ, Mehrabadi Z, Farjam MH, Gutiérrez A, Adarsh NN. Synthesis and structural characterization of a novel Zn(II) metal organic complex (Zn-MOC) and elimination of highly consumed antibiotic; tetracycline from aqueous solution by their nanostructures photocatalyst under visible light. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129448] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Nakou IT, Jenner M, Dashti Y, Romero‐Canelón I, Masschelein J, Mahenthiralingam E, Challis GL. Genomics-Driven Discovery of a Novel Glutarimide Antibiotic from Burkholderia gladioli Reveals an Unusual Polyketide Synthase Chain Release Mechanism. Angew Chem Int Ed Engl 2020; 59:23145-23153. [PMID: 32918852 PMCID: PMC7756379 DOI: 10.1002/anie.202009007] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/18/2020] [Indexed: 11/07/2022]
Abstract
A gene cluster encoding a cryptic trans‐acyl transferase polyketide synthase (PKS) was identified in the genomes of Burkholderia gladioli BCC0238 and BCC1622, both isolated from the lungs of cystic fibrosis patients. Bioinfomatics analyses indicated the PKS assembles a novel member of the glutarimide class of antibiotics, hitherto only isolated from Streptomyces species. Screening of a range of growth parameters led to the identification of gladiostatin, the metabolic product of the PKS. NMR spectroscopic analysis revealed that gladiostatin, which has promising activity against several human cancer cell lines and inhibits tumor cell migration, contains an unusual 2‐acyl‐4‐hydroxy‐3‐methylbutenolide in addition to the glutarimide pharmacophore. An AfsA‐like domain at the C‐terminus of the PKS was shown to catalyze condensation of 3‐ketothioesters with dihydroxyacetone phosphate, thus indicating it plays a key role in polyketide chain release and butenolide formation.
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Affiliation(s)
- Ioanna T. Nakou
- Department of ChemistryUniversity of WarwickCoventryCV4 7ALUK
| | - Matthew Jenner
- Department of ChemistryUniversity of WarwickCoventryCV4 7ALUK
- Warwick Integrative Synthetic Biology CentreUniversity of WarwickCoventryCV4 7ALUK
| | - Yousef Dashti
- Department of ChemistryUniversity of WarwickCoventryCV4 7ALUK
- Current Address: The Centre for Bacterial Cell Biology, Biosciences InstituteMedical SchoolNewcastle UniversityNewcastle upon TyneNE2 4AXUK
| | - Isolda Romero‐Canelón
- Institute of Clinical SciencesSchool of PharmacyUniversity of BirminghamBirminghamB15 2TTUK
| | - Joleen Masschelein
- Department of ChemistryUniversity of WarwickCoventryCV4 7ALUK
- Current Address: Laboratory for Biomolecular Discovery &, EngineeringVIB-KU Leuven Center for MicrobiologyDepartment of BiologyKU Leuven3001LeuvenBelgium
| | - Eshwar Mahenthiralingam
- Organisms and Environment DivisionCardiff School of BiosciencesCardiff UniversityCardiffCF10 3ATUK
| | - Gregory L. Challis
- Department of ChemistryUniversity of WarwickCoventryCV4 7ALUK
- Warwick Integrative Synthetic Biology CentreUniversity of WarwickCoventryCV4 7ALUK
- Department of Biochemistry and Molecular BiologyARC Centre of Excellence for Innovations in Peptide and Protein ScienceMonash UniversityVictoria3800Australia
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13
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Nakou IT, Jenner M, Dashti Y, Romero‐Canelón I, Masschelein J, Mahenthiralingam E, Challis GL. Genomics‐Driven Discovery of a Novel Glutarimide Antibiotic from
Burkholderia gladioli
Reveals an Unusual Polyketide Synthase Chain Release Mechanism. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ioanna T. Nakou
- Department of Chemistry University of Warwick Coventry CV4 7AL UK
| | - Matthew Jenner
- Department of Chemistry University of Warwick Coventry CV4 7AL UK
- Warwick Integrative Synthetic Biology Centre University of Warwick Coventry CV4 7AL UK
| | - Yousef Dashti
- Department of Chemistry University of Warwick Coventry CV4 7AL UK
- Current Address: The Centre for Bacterial Cell Biology, Biosciences Institute Medical School Newcastle University Newcastle upon Tyne NE2 4AX UK
| | - Isolda Romero‐Canelón
- Institute of Clinical Sciences School of Pharmacy University of Birmingham Birmingham B15 2TT UK
| | - Joleen Masschelein
- Department of Chemistry University of Warwick Coventry CV4 7AL UK
- Current Address: Laboratory for Biomolecular Discovery &, Engineering VIB-KU Leuven Center for Microbiology Department of Biology KU Leuven 3001 Leuven Belgium
| | - Eshwar Mahenthiralingam
- Organisms and Environment Division Cardiff School of Biosciences Cardiff University Cardiff CF10 3AT UK
| | - Gregory L. Challis
- Department of Chemistry University of Warwick Coventry CV4 7AL UK
- Warwick Integrative Synthetic Biology Centre University of Warwick Coventry CV4 7AL UK
- Department of Biochemistry and Molecular Biology ARC Centre of Excellence for Innovations in Peptide and Protein Science Monash University Victoria 3800 Australia
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14
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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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15
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Huo X, Zhou P, Zhang J, Liu Y, Cheng X, Liu Y, Li W, Zhang Y. N, S-Doped porous carbons for persulfate activation to remove tetracycline: Nonradical mechanism. JOURNAL OF HAZARDOUS MATERIALS 2020; 391:122055. [PMID: 32045799 DOI: 10.1016/j.jhazmat.2020.122055] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 12/28/2019] [Accepted: 01/08/2020] [Indexed: 06/10/2023]
Abstract
Nitrogen and sulfur-codoped porous carbons (SNCs) with porous structures and high surface areas were successfully synthesized employing coffee grounds, sodium bicarbonate and L-cysteine monohydrochloride as precursors. The SNCs were highly efficient for adsorption and exhibited outstanding catalytic performance for the oxidative degradation of tetracycline hydrochloride (TeC) solutions, especially at a calcined temperature of 700 °C (SNCs-700). The radical quenching, advanced in situ electron paramagnetic resonance (EPR) technology, PS decomposition rates and Linear Sweep Voltammetry (LSV) indicated that the excellent oxidative effectiveness of the PS/SNCs-700 system originated from the nonradical pathways (singlet oxygen (1O2) and electron transfer). It's supposed that N and S doping can effectively create point defects, which could generate 1O2, while carbonyl groups were determined to be the main active sites contributing to the electron transfer. TeC degradation intermediates were also identified, three degradation pathways, revealing that the pre-adsorption significantly accelerated the nonradical oxidation pathways. This approach provides an innovative method for the large-scale production and application of high-quality catalysts in water treatment.
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Affiliation(s)
- Xiaowei Huo
- College of Architecture & Environment, Sichuan University, Chengdu 610065, PR China
| | - Peng Zhou
- College of Architecture & Environment, Sichuan University, Chengdu 610065, PR China
| | - Jing Zhang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, PR China.
| | - Yunxin Liu
- College of Architecture & Environment, Sichuan University, Chengdu 610065, PR China
| | - Xin Cheng
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut, 06511, United States
| | - Yang Liu
- College of Architecture & Environment, Sichuan University, Chengdu 610065, PR China
| | - Wenshu Li
- College of Architecture & Environment, Sichuan University, Chengdu 610065, PR China
| | - Yongli Zhang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, PR China
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16
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Douchi T, Akitake M, Sonoda M, Sugiyama Y, Tanimori S. Enantio and diastereoselective total synthesis of all four stereoisomers of germicidin N. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1745240] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Tsuyoshi Douchi
- Department of Applied Biosciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Japan
| | - Masahiro Akitake
- Department of Applied Biosciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Japan
| | - Motohiro Sonoda
- Department of Applied Biosciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Japan
| | - Yasumasa Sugiyama
- Department of Food and Health Sciences, Jissen Women’s University, Osakaue, Japan
| | - Shinji Tanimori
- Department of Applied Biosciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Japan
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17
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Song L, Feng Q, Wang Y, Ding S, Wu YD, Zhang X, Chung LW, Sun J. Ru-Catalyzed Migratory Geminal Semihydrogenation of Internal Alkynes to Terminal Olefins. J Am Chem Soc 2019; 141:17441-17451. [DOI: 10.1021/jacs.9b09658] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Lijuan Song
- Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany
| | - Qiang Feng
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yong Wang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Shengtao Ding
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yun-Dong Wu
- Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Shenzhen Bay Laboratory, Shenzhen 518055, China
- College of Chemistry, Peking University, Beijing 100871, China
| | - Xinhao Zhang
- Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Shenzhen Bay Laboratory, Shenzhen 518055, China
| | - Lung Wa Chung
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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18
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Wang Q, Li P, Zhang Z, Jiang C, Zuojiao K, Liu J, Wang Y. Kinetics and mechanism insights into the photodegradation of tetracycline hydrochloride and ofloxacin mixed antibiotics with the flower-like BiOCl/TiO2 heterojunction. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.04.028] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Fürstner A. trans-Hydrogenation, gem-Hydrogenation, and trans-Hydrometalation of Alkynes: An Interim Report on an Unorthodox Reactivity Paradigm. J Am Chem Soc 2018; 141:11-24. [DOI: 10.1021/jacs.8b09782] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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20
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Hale KJ, Manaviazar S, Watson HA. The O‐Directed Free Radical Hydrostannation of Propargyloxy Dialkyl Acetylenes with Ph3SnH/cat. Et3B. A Refutal of the Stannylvinyl Cation Mechanism. CHEM REC 2018; 19:238-319. [DOI: 10.1002/tcr.201700104] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 09/04/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Karl J. Hale
- School of Chemistry and Chemical Engineering and the Centre for Cancer Research and Cell Biology (CCRCB)Queen's University Belfast Stranmillis Road Belfast BT9 5AG, Northern Ireland United Kingdom
| | - Soraya Manaviazar
- School of Chemistry and Chemical Engineering and the Centre for Cancer Research and Cell Biology (CCRCB)Queen's University Belfast Stranmillis Road Belfast BT9 5AG, Northern Ireland United Kingdom
| | - Hamish A. Watson
- School of Chemistry and Chemical Engineering and the Centre for Cancer Research and Cell Biology (CCRCB)Queen's University Belfast Stranmillis Road Belfast BT9 5AG, Northern Ireland United Kingdom
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21
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Heravi MM, Mohammadkhani L. Recent applications of Stille reaction in total synthesis of natural products: An update. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.05.018] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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22
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Gade NR, Iqbal J. Natural Product Inspired Topology Directed Synthesis of Hybrid Macrocyclic Compounds: A Simple Approach to Natural Product Analogues. ChemistrySelect 2018. [DOI: 10.1002/slct.201801117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Narendar Reddy Gade
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli; Hyderabad - 500046, Telangana India
- Department of Chemical and Life Science Engineering; Virginia Commonwealth University, Biotech Eight; Richmond, VA 23219 USA
| | - Javed Iqbal
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli; Hyderabad - 500046, Telangana India
- Cosmic Discoveries Private Ltd. MaRS Discovery District; 101 College Street Toronto M5G 0B7 Canada
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23
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Unzue A, Cribiú R, Hoffman MM, Knehans T, Lafleur K, Caflisch A, Nevado C. Iriomoteolides: novel chemical tools to study actin dynamics. Chem Sci 2018; 9:3793-3802. [PMID: 29780512 PMCID: PMC5939837 DOI: 10.1039/c7sc04286h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 03/10/2018] [Indexed: 01/25/2023] Open
Abstract
Despite its promising biological profile, the cellular targets of iriomoteolide-3a, a novel 15-membered macrolide isolated from Amphidinium sp., have remained unknown. A small library of non-natural iriomoteolide-3a analogues is presented here as a result of a novel, highly convergent, catalysis-based scaffold-diversification campaign, which revealed the suitable sites for chemical editing in the original core. We provide compelling experimental evidence for actin as one of iriomoteolides' primary cellular targets, establishing the ability of these secondary metabolites to inhibit cell migration, induce severe morphological changes in cells and cause a reversible cytoplasmic retraction and reduction of F-actin fibers in a time and dose dependent manner. These results are interpreted in light of the ability of iriomoteolides to stabilize F-actin filaments. Molecular dynamics simulations provide evidence for iriomoteolide-3a binding to the barbed end of G-actin. These results showcase iriomoteolides as novel and easily tunable chemical probes for the in vitro study of actin dynamics in the context of cell motility processes including cell invasion and division.
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Affiliation(s)
- A Unzue
- Department of Chemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - R Cribiú
- Department of Chemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - M M Hoffman
- Department of Chemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - T Knehans
- Department of Biochemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - K Lafleur
- Department of Chemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - A Caflisch
- Department of Biochemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
| | - C Nevado
- Department of Chemistry , University of Zürich , Winterthurerstrasse 190 , CH-8057 , Zürich , Switzerland .
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24
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Meng Z, Souillart L, Monks B, Huwyler N, Herrmann J, Müller R, Fürstner A. A “Motif-Oriented” Total Synthesis of Nannocystin Ax. Preparation and Biological Assessment of Analogues. J Org Chem 2017; 83:6977-6994. [DOI: 10.1021/acs.joc.7b02871] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhanchao Meng
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | | | - Brendan Monks
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Nikolas Huwyler
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Jennifer Herrmann
- Helmholtz Institute for Pharmaceutical Research Saarland, Saarland University, 66123 Saarbrücken, Germany
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland, Saarland University, 66123 Saarbrücken, Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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25
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Könst ZA, Szklarski AR, Pellegrino S, Michalak SE, Meyer M, Zanette C, Cencic R, Nam S, Voora VK, Horne DA, Pelletier J, Mobley DL, Yusupova G, Yusupov M, Vanderwal CD. Synthesis facilitates an understanding of the structural basis for translation inhibition by the lissoclimides. Nat Chem 2017; 9:1140-1149. [PMID: 29064494 DOI: 10.1038/nchem.2800] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 05/10/2017] [Indexed: 11/09/2022]
Abstract
The lissoclimides are unusual succinimide-containing labdane diterpenoids that were reported to be potent cytotoxins. Our short semisynthesis and analogue-oriented synthesis approaches provide a series of lissoclimide natural products and analogues that expand the structure-activity relationships (SARs) in this family. The semisynthesis approach yielded significant quantities of chlorolissoclimide (CL) to permit an evaluation against the National Cancer Institute's 60-cell line panel and allowed us to obtain an X-ray co-crystal structure of the synthetic secondary metabolite with the eukaryotic 80S ribosome. Although it shares a binding site with other imide-based natural product translation inhibitors, CL engages in a particularly interesting and novel face-on halogen-π interaction between the ligand's alkyl chloride and a guanine residue. Our analogue-oriented synthesis provides many more lissoclimide compounds, which were tested against aggressive human cancer cell lines and for protein synthesis inhibitory activity. Finally, computational modelling was used to explain the SARs of certain key compounds and set the stage for the structure-guided design of better translation inhibitors.
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Affiliation(s)
- Zef A Könst
- Department of Chemistry, University of California, 1102 Natural Sciences II, Irvine, California 92697-2025, USA
| | - Anne R Szklarski
- Department of Chemistry, University of California, 1102 Natural Sciences II, Irvine, California 92697-2025, USA
| | - Simone Pellegrino
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR7104, Université de Strasbourg, 67404 Illkirch, France
| | - Sharon E Michalak
- Department of Chemistry, University of California, 1102 Natural Sciences II, Irvine, California 92697-2025, USA
| | - Mélanie Meyer
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR7104, Université de Strasbourg, 67404 Illkirch, France
| | - Camila Zanette
- Department of Pharmaceutical Sciences, University of California, Irvine, California 91010 92697, USA
| | - Regina Cencic
- Department of Biochemistry, McGill University, Montréal, Québec H3G 1Y6, Canada
| | - Sangkil Nam
- Department of Molecular Medicine, Beckman Research Institute, City of Hope Comprehensive Cancer Center, 1500 East Duarte Road, Duarte, California 91010, USA
| | - Vamsee K Voora
- Department of Chemistry, University of California, 1102 Natural Sciences II, Irvine, California 92697-2025, USA
| | - David A Horne
- Department of Molecular Medicine, Beckman Research Institute, City of Hope Comprehensive Cancer Center, 1500 East Duarte Road, Duarte, California 91010, USA
| | - Jerry Pelletier
- Department of Biochemistry, McGill University, Montréal, Québec H3G 1Y6, Canada
| | - David L Mobley
- Department of Pharmaceutical Sciences, University of California, Irvine, California 91010 92697, USA
| | - Gulnara Yusupova
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR7104, Université de Strasbourg, 67404 Illkirch, France
| | - Marat Yusupov
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR7104, Université de Strasbourg, 67404 Illkirch, France
| | - Christopher D Vanderwal
- Department of Chemistry, University of California, 1102 Natural Sciences II, Irvine, California 92697-2025, USA
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26
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Zhang B, Xu Z, Teng Q, Pan G, Ma M, Shen B. A Long-Range Acting Dehydratase Domain as the Missing Link for C17-Dehydration in Iso-Migrastatin Biosynthesis. Angew Chem Int Ed Engl 2017; 56:7247-7251. [PMID: 28464455 DOI: 10.1002/anie.201703588] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Indexed: 11/05/2022]
Abstract
The dehydratase domains (DHs) of the iso-migrastatin (iso-MGS) polyketide synthase (PKS) were investigated by systematic inactivation of the DHs in module-6, -9, -10 of MgsF (i.e., DH6, DH9, DH10) and module-11 of MgsG (i.e., DH11) in vivo, followed by structural characterization of the metabolites accumulated by the mutants, and biochemical characterization of DH10 in vitro, using polyketide substrate mimics with varying chain lengths. These studies allowed us to assign the functions for all four DHs, identifying DH10 as the dedicated dehydratase that catalyzes the dehydration of the C17 hydroxy group during iso-MGS biosynthesis. In contrast to canonical DHs that catalyze dehydration of the β-hydroxy groups of the nascent polyketide intermediates, DH10 acts in a long-range manner that is unprecedented for type I PKSs, a novel dehydration mechanism that could be exploited for polyketide structural diversity by combinatorial biosynthesis and synthetic biology.
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Affiliation(s)
- Bo Zhang
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, 33458, USA
| | - Zhengren Xu
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, 33458, USA
| | - Qihui Teng
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, 33458, USA
| | - Guohui Pan
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, 33458, USA
| | - Ming Ma
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, 33458, USA
| | - Ben Shen
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, 33458, USA.,Department of Molecular Medicine, Natural Products Library Initiative, The Scripps Research Institute, Jupiter, FL, 33458, USA
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27
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Zhang B, Xu Z, Teng Q, Pan G, Ma M, Shen B. A Long-Range Acting Dehydratase Domain as the Missing Link for C17-Dehydration in Iso-Migrastatin Biosynthesis. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703588] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Bo Zhang
- Department of Chemistry; The Scripps Research Institute; Jupiter FL 33458 USA
| | - Zhengren Xu
- Department of Chemistry; The Scripps Research Institute; Jupiter FL 33458 USA
| | - Qihui Teng
- Department of Chemistry; The Scripps Research Institute; Jupiter FL 33458 USA
| | - Guohui Pan
- Department of Chemistry; The Scripps Research Institute; Jupiter FL 33458 USA
| | - Ming Ma
- Department of Chemistry; The Scripps Research Institute; Jupiter FL 33458 USA
| | - Ben Shen
- Department of Chemistry; The Scripps Research Institute; Jupiter FL 33458 USA
- Department of Molecular Medicine, Natural Products Library Initiative; The Scripps Research Institute; Jupiter FL 33458 USA
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28
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Brzozowski RS, Wuest WM. Twelve-membered macrolactones: privileged scaffolds for the development of new therapeutics. Chem Biol Drug Des 2017; 89:169-191. [PMID: 27153932 DOI: 10.1111/cbdd.12783] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 04/26/2016] [Accepted: 04/27/2016] [Indexed: 12/15/2022]
Abstract
Natural products commonly produced as secondary metabolites of various plants and micro-organisms represent a diverse chemical space of compounds. The diversity of natural products makes them an attractive target for interrogation by both chemists and biologists alike. Indeed, the study of 12-membered macrolactones has already led to the discovery of lead drug compounds and new biological targets, which has motivated the development of diverted total synthetic routes to libraries of analogs. This review explores the discovery, biological characterization, and synthesis of several 12-membered macrolactones, exploiting examples that underscore their importance in the drug discovery field. It is our hope that this review will motivate further interest in this class of natural products, a group of molecules that we think merit the classification of 'privileged scaffolds' within the medicinal chemistry community, to further investigate and develop novel compounds with promising bioactivity.
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Affiliation(s)
| | - William M Wuest
- Department of Chemistry, Temple University, Philadelphia, PA, USA
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29
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Lee HJ, Kim YB, Shin Y. Advances in Epidemiology, Biology and Laboratory Diagnosis of Zika Virus. ACTA ACUST UNITED AC 2017. [DOI: 10.4167/jbv.2017.47.1.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Hee-Jung Lee
- Department of Bio-industrial Technologies, Konkuk University, Seoul, Korea
| | - Young Bong Kim
- Department of Bio-industrial Technologies, Konkuk University, Seoul, Korea
| | - Yungoh Shin
- Korean Institute of Science and Technology Information, Seoul, Korea
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30
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Schaubach S, Gebauer K, Ungeheuer F, Hoffmeister L, Ilg MK, Wirtz C, Fürstner A. A Two-Component Alkyne Metathesis Catalyst System with an Improved Substrate Scope and Functional Group Tolerance: Development and Applications to Natural Product Synthesis. Chemistry 2016; 22:8494-507. [DOI: 10.1002/chem.201601163] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Indexed: 01/02/2023]
Affiliation(s)
| | - Konrad Gebauer
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Felix Ungeheuer
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | | | - Marina K. Ilg
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
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31
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Zhuo C, Fürstner A. Concise Synthesis of a Pateamine A Analogue with In Vivo Anticancer Activity Based on an Iron‐Catalyzed Pyrone Ring Opening/Cross‐Coupling. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602125] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Chun‐Xiang Zhuo
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
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32
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Zhuo C, Fürstner A. Concise Synthesis of a Pateamine A Analogue with In Vivo Anticancer Activity Based on an Iron‐Catalyzed Pyrone Ring Opening/Cross‐Coupling. Angew Chem Int Ed Engl 2016; 55:6051-6. [DOI: 10.1002/anie.201602125] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Chun‐Xiang Zhuo
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
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33
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Carocci M, Yang PL. Lactimidomycin is a broad-spectrum inhibitor of dengue and other RNA viruses. Antiviral Res 2016; 128:57-62. [PMID: 26872864 DOI: 10.1016/j.antiviral.2016.02.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 01/30/2016] [Accepted: 02/01/2016] [Indexed: 01/07/2023]
Abstract
Dengue virus, a member of the Flaviviridae family, is a mosquito-borne pathogen and the causative agent of dengue fever. Despite the nearly 400 million new infections estimated annually, no vaccines or specific antiviral therapeutics are currently available. We identified lactimidomycin (LTM), a recently established inhibitor of translation elongation, as a potent inhibitor of dengue virus 2 infection in cell culture. The antiviral activity is observed at concentrations that do not affect cell viability. We show that Kunjin virus and Modoc virus, two other members of the Flavivirus genus, as well as vesicular stomatitis virus and poliovirus 1, are also sensitive to LTM. Our findings suggest that inhibition of translation elongation, an obligate step in the viral replication cycle, may provide a general antiviral strategy against fast-replicating RNA viruses.
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Affiliation(s)
- Margot Carocci
- Harvard Medical School, Department of Microbiology and Immunobiology, 77 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Priscilla L Yang
- Harvard Medical School, Department of Microbiology and Immunobiology, 77 Avenue Louis Pasteur, Boston, MA 02115, USA.
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34
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Larsen BJ, Sun Z, Lachacz E, Khomutnyk Y, Soellner MB, Nagorny P. Synthesis and Biological Evaluation of Lactimidomycin and Its Analogues. Chemistry 2015; 21:19159-67. [PMID: 26577990 DOI: 10.1002/chem.201503527] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Indexed: 02/06/2023]
Abstract
The studies culminating in the total synthesis of the glutarimide-containing eukaryote translation elongation inhibitor lactimidomycin are described. The optimized synthetic route features a Zn(II)-mediated intramolecular Horner-Wadsworth-Emmons (HWE) reaction resulting in a highly stereoselective formation of the strained 12-membered macrolactone of lactimidomycin on a 423 mg scale. The presence of the E,Z-diene functionality was found to be key for effective macrocyclizations as a complete removal of these unsaturation units resulted in exclusive formation of the dimer rather than monocyclic enoate. The synthetic route features a late-stage installation of the glutarimide functionality via an asymmetric catalytic Mukaiyama aldol reaction, which allows for a quick generation of lactimidomycin homolog 55 containing two additional carbons in the glutarimide side chain. Similar to lactimidomycin, this analog was found to possess cytotoxicity against MDA-MB-231 breast cancer cells (GI50 =1-3 μM) using in vitro 2D and 3D assays. Although lactimidomycin was found to be the most potent compound in terms of anticancer activity, 55 as well as truncated analogues 50-52 lacking the glutarimide side-chain were found to be significantly less toxic against human mammary epithelial cells.
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Affiliation(s)
- Brian J Larsen
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055 (USA)
| | - Zhankui Sun
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055 (USA)
| | - Eric Lachacz
- Medicinal Chemistry Department, College of Pharmacy, University of Michigan, 428 Church Street, Ann Arbor, MI 48109-1065 (USA)
| | - Yaroslav Khomutnyk
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055 (USA)
| | - Matthew B Soellner
- Medicinal Chemistry Department, College of Pharmacy, University of Michigan, 428 Church Street, Ann Arbor, MI 48109-1065 (USA).
| | - Pavel Nagorny
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055 (USA).
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35
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Pati K, Michas C, Allenger D, Piskun I, Coutros PS, Gomes GDP, Alabugin IV. Synthesis of Functionalized Phenanthrenes via Regioselective Oxidative Radical Cyclization. J Org Chem 2015; 80:11706-17. [DOI: 10.1021/acs.joc.5b01014] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kamalkishore Pati
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Christopher Michas
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - David Allenger
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Ilya Piskun
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Peter S. Coutros
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Gabriel dos Passos Gomes
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Igor V. Alabugin
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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36
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Li W, Schneider CM, Georg GI. Synthesis of Strained 1,3-Diene Macrocycles via Copper-Mediated Castro–Stephens Coupling/Alkyne Reduction Tandem Reactions. Org Lett 2015; 17:3902-5. [PMID: 26176267 DOI: 10.1021/acs.orglett.5b01892] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei Li
- Department
of Chemistry, Department of Medicinal Chemistry, and the Institute
for Therapeutics Discovery and Development, University of Minnesota, 717 Delaware Street SE, Minneapolis, Minnesota 55414, United States
| | - Christopher M. Schneider
- Department
of Medicinal Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
| | - Gunda I. Georg
- Department
of Chemistry, Department of Medicinal Chemistry, and the Institute
for Therapeutics Discovery and Development, University of Minnesota, 717 Delaware Street SE, Minneapolis, Minnesota 55414, United States
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37
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Ungeheuer F, Fürstner A. Concise Total Synthesis of Ivorenolide B. Chemistry 2015; 21:11387-92. [DOI: 10.1002/chem.201501765] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Felix Ungeheuer
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Alois Fürstner
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
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38
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Willwacher J, Heggen B, Wirtz C, Thiel W, Fürstner A. Total Synthesis, Stereochemical Revision, and Biological Reassessment of Mandelalide A: Chemical Mimicry of Intrafamily Relationships. Chemistry 2015; 21:10416-30. [PMID: 26094957 DOI: 10.1002/chem.201501491] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Indexed: 11/06/2022]
Abstract
Mandelalide A and three congeners had recently been isolated as the supposedly highly cytotoxic principles of an ascidian collected off the South African coastline. Since these compounds are hardly available from the natural source, a concise synthesis route was developed, targeting structure 1 as the purported representation of mandelalide A. The sequence involves an iridium-catalyzed two-directional Krische allylation and a cobalt-catalyzed carbonylative epoxide opening as entry points for the preparation of the major building blocks. The final stages feature the first implementation of terminal acetylene metathesis into natural product total synthesis, which is remarkable in that this class of substrates had been beyond the reach of alkyne metathesis for decades. Synthetic 1, however, proved not to be identical with the natural product. In an attempt to clarify this issue, NMR spectra were simulated for 20 conceivable diastereomers by using DFT followed by DP4 analysis; however, this did not provide a reliable assignment either. The puzzle was ultimately solved by the preparation of three diastereomers, of which compound 6 proved identical with mandelalide A in all analytical and spectroscopic regards. As the entire "northern sector" about the tetrahydrofuran ring in 6 shows the opposite configuration of what had originally been assigned, it is highly likely that the stereostructures of the sister compounds mandelalides B-D must be corrected analogously; we propose that these natural products are accurately represented by structures 68-70. In an attempt to prove this reassignment, an entry into mandelalides C and D was sought by subjecting an advanced intermediate of the synthesis of 6 to a largely unprecedented intramolecular Morita-Baylis-Hillman reaction, which furnished the γ-lactone derivative 74 as a mixture of diastereomers. Whereas (24R)-74 was amenable to a hydroxyl-directed dihydroxylation by using OsO4 /TMEDA as the reagent, the sister compound (24S)-74 did not follow a directed path but simply obeyed Kishi's rule; only this unexpected escape precluded the preparation of mandelalides C and D by this route. A combined spectroscopic and computational (DFT) study showed that the reasons for this strikingly different behavior of the two diastereomers of 74 are rooted in their conformational peculiarities. This aspect apart, our results show that the OsO4 /TMEDA complex reacts preferentially with electron deficient double bonds even if other alkenes are present that are more electron rich and less encumbered. Finally, in a brief biological survey authentic mandelalide A (6) was found to exhibit appreciable cytotoxicity only against one out of three tested human cancer cell lines and all synthetic congeners were hardly active. No significant fungicidal properties were observed.
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Affiliation(s)
- Jens Willwacher
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Berit Heggen
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany).
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39
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Rummelt SM, Radkowski K, Roşca DA, Fürstner A. Interligand Interactions Dictate the Regioselectivity oftrans-Hydrometalations and Related Reactions Catalyzed by [Cp*RuCl]. Hydrogen Bonding to a Chloride Ligand as a Steering Principle in Catalysis. J Am Chem Soc 2015; 137:5506-19. [DOI: 10.1021/jacs.5b01475] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Karin Radkowski
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | | | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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40
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Fuchs M, Fürstner A. trans-Hydrogenation: application to a concise and scalable synthesis of brefeldin A. Angew Chem Int Ed Engl 2015; 54:3978-82. [PMID: 25651519 PMCID: PMC4471581 DOI: 10.1002/anie.201411618] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Indexed: 11/07/2022]
Abstract
The important biochemical probe molecule brefeldin A (1) has served as an inspirational target in the past, but none of the many routes has actually delivered more than just a few milligrams of product, where documented. The approach described herein is clearly more efficient; it hinges upon the first implementation of ruthenium-catalyzed trans-hydrogenation in natural products total synthesis. Because this unorthodox reaction is selective for the triple bond and does not touch the transannular alkene or the lactone site of the cycloalkyne, it outperforms the classical Birch-type reduction that could not be applied at such a late stage. Other key steps en route to 1 comprise an iron-catalyzed reductive formation of a non-terminal alkyne, an asymmetric propiolate carbonyl addition mediated by a bulky amino alcohol, and a macrocyclization by ring-closing alkyne metathesis catalyzed by a molybdenum alkylidyne.
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Affiliation(s)
- Michael Fuchs
- Max-Planck-Institut für Kohlenforschung45470 Mülheim/Ruhr (Germany)
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung45470 Mülheim/Ruhr (Germany)
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41
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Fuchs M, Fürstner A. trans-Hydrogenation: Application to a Concise and Scalable Synthesis of Brefeldin A. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 127:4050-4054. [PMID: 27478259 PMCID: PMC4955225 DOI: 10.1002/ange.201411618] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Indexed: 12/23/2022]
Abstract
The important biochemical probe molecule brefeldin A (1) has served as an inspirational target in the past, but none of the many routes has actually delivered more than just a few milligrams of product, where documented. The approach described herein is clearly more efficient; it hinges upon the first implementation of ruthenium-catalyzed trans-hydrogenation in natural products total synthesis. Because this unorthodox reaction is selective for the triple bond and does not touch the transannular alkene or the lactone site of the cycloalkyne, it outperforms the classical Birch-type reduction that could not be applied at such a late stage. Other key steps en route to 1 comprise an iron-catalyzed reductive formation of a non-terminal alkyne, an asymmetric propiolate carbonyl addition mediated by a bulky amino alcohol, and a macrocyclization by ring-closing alkyne metathesis catalyzed by a molybdenum alkylidyne.
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Affiliation(s)
- Michael Fuchs
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
| | - Alois Fürstner
- Max‐Planck‐Institut für Kohlenforschung, 45470 Mülheim/Ruhr (Germany)
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42
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2013. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.09.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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43
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Pati K, dos Passos Gomes G, Harris T, Hughes A, Phan H, Banerjee T, Hanson K, Alabugin IV. Traceless Directing Groups in Radical Cascades: From Oligoalkynes to Fused Helicenes without Tethered Initiators. J Am Chem Soc 2015; 137:1165-80. [DOI: 10.1021/ja510563d] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Kamalkishore Pati
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Gabriel dos Passos Gomes
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Trevor Harris
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Audrey Hughes
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Hoa Phan
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Tanmay Banerjee
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Kenneth Hanson
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Igor V. Alabugin
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
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44
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Bailey CL, Clary JW, Tansakul C, Klabunde L, Anderson CL, Joh AY, Lill AT, Peer N, Braslau R, Singaram B. Reduction of Weinreb amides to aldehydes under ambient conditions with magnesium borohydride reagents. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.12.066] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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45
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Abstract
An ene–yne coupling/alkyne reduction tandem ring-closing reaction was employed for the formal total synthesis of the anti-tumor natural product lactimidomycin.
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Affiliation(s)
- Wei Li
- Department of Chemistry
- Department of Medicinal Chemistry and the Institute for Therapeutics Discovery and Development
- University of Minnesota
- Minneapolis
- USA
| | - Gunda I. Georg
- Department of Chemistry
- Department of Medicinal Chemistry and the Institute for Therapeutics Discovery and Development
- University of Minnesota
- Minneapolis
- USA
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46
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Valot G, Mailhol D, Regens CS, O'Malley DP, Godineau E, Takikawa H, Philipps P, Fürstner A. Concise Total Syntheses of Amphidinolides C and F. Chemistry 2014; 21:2398-408. [DOI: 10.1002/chem.201405790] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Indexed: 01/23/2023]
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47
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Lehr K, Schulthoff S, Ueda Y, Mariz R, Leseurre L, Gabor B, Fürstner A. A New Method for the Preparation of Non-Terminal Alkynes: Application to the Total Syntheses of Tulearin A and C. Chemistry 2014; 21:219-27. [DOI: 10.1002/chem.201404873] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Indexed: 11/11/2022]
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48
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Mailhol D, Willwacher J, Kausch-Busies N, Rubitski EE, Sobol Z, Schuler M, Lam MH, Musto S, Loganzo F, Maderna A, Fürstner A. Synthesis, Molecular Editing, and Biological Assessment of the Potent Cytotoxin Leiodermatolide. J Am Chem Soc 2014; 136:15719-29. [DOI: 10.1021/ja508846g] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Damien Mailhol
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Jens Willwacher
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | | | - Elizabeth E. Rubitski
- Pfizer Drug Safety Research and Development, 445 Eastern Point Road, Groton, Connecticut 06340, United States
| | - Zhanna Sobol
- Pfizer Drug Safety Research and Development, 445 Eastern Point Road, Groton, Connecticut 06340, United States
| | - Maik Schuler
- Pfizer Drug Safety Research and Development, 445 Eastern Point Road, Groton, Connecticut 06340, United States
| | - My-Hanh Lam
- Pfizer Oncology, 401 North Middletown
Road, Pearl River, New York 10965, United States
| | - Sylvia Musto
- Pfizer Oncology, 401 North Middletown
Road, Pearl River, New York 10965, United States
| | - Frank Loganzo
- Pfizer Oncology, 401 North Middletown
Road, Pearl River, New York 10965, United States
| | - Andreas Maderna
- Pfizer Oncology Medicinal Chemistry, 445 Eastern Point Road, Groton, Connecticut 06340, United States
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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49
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Gade NR, Iqbal J. A Common Synthetic Protocol for the Cyclic and Acyclic Core of Migrastatin, Isomigrastatin, and Dorrigocin via a Chiral β-Hydroxy-γ-butyrolactone Intermediate. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402830] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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50
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Fürstner A. Catalysis for Total Synthesis: A Personal Account. Angew Chem Int Ed Engl 2014; 53:8587-98. [DOI: 10.1002/anie.201402719] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Indexed: 01/09/2023]
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