1
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Bobbitt JM, Eddy NA, Brückner C, Bailey WF, Merbouh N. Bobbitt's Salt-Mediated Oxidation of Alkynyl-ols and -diols to the Corresponding Aldehydes and Their Application in Tandem Reactions. J Org Chem 2023. [PMID: 36812364 DOI: 10.1021/acs.joc.2c02828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Propargyl alcohol derivatives were readily oxidized using Bobbitt's salt to yield the corresponding propynal products. 2-Butyn-1,4-diol may be selectively oxidized to provide either 4-hydroxy-2-butynal or acetylene dicarboxaldehyde, and the resulting stable dichloromethane solutions containing the chemically sensitive acetylene aldehydes were used directly in subsequent Wittig, Grignard, or Diels-Alder reactions. This method provides safe and efficient access to propynals and allows the preparation of polyfunctional acetylene compounds from readily accessible starting material without the use of protecting groups.
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Affiliation(s)
- James M Bobbitt
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Nicholas A Eddy
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Christian Brückner
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - William F Bailey
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Nabyl Merbouh
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
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2
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Sarmiento-Vizcaíno A, Martín J, Ortiz-López FJ, Reyes F, García LA, Blanco G. Natural products, including a new caboxamycin, from Streptomyces and other Actinobacteria isolated in Spain from storm clouds transported by Northern winds of Arctic origin. Front Chem 2022; 10:948795. [DOI: 10.3389/fchem.2022.948795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022] Open
Abstract
Actinobacteria, mostly Streptomyces species, are the main source of natural products essential in medicine. While the majority of producer microorganisms of secondary metabolite are reported from terrestrial or marine environments, there are limited reports of their isolation from atmospheric precipitations. Clouds are considered as atmospheric oases for microorganisms and there is a recent paradigm shift whereby atmospheric-derived Actinobacteria emerge as an alternative source for drug discovery. In this context, we studied a total of 18 bioactive Actinobacteria strains, isolated by sampling nine precipitation events with prevailing Northern winds in the Cantabrian Sea coast, Northern Spain. Backward trajectories meteorological analyses indicate that air masses were originated mostly in the Arctic Ocean, and their trajectory to downwind areas involved the Atlantic Ocean and also terrestrial sources from continental Europe, and in some events from Canada, Greenland, Mauritania and Canary Islands. Taxonomic identification of the isolates, by 16S rRNA gene sequencing and phylogenetic analyses, revealed that they are members of three Actinobacteria genera. Fifteen of the isolates are Streptomyces species, thus increasing the number of bioactive species of this genus in the atmosphere to a 6.8% of the total currently validated species. In addition, two of the strains belong to the genus Micromonospora and one to genus Nocardiopsis. These findings reinforce a previous atmospheric dispersal model, extended herein to the genus Micromonospora. Production of bioactive secondary metabolites was screened in ethyl acetate extracts of the strains by LC-UV-MS and a total of 94 secondary metabolites were detected after LC/MS dereplication. Comparative analyses with natural products databases allowed the identification of 69 structurally diverse natural products with contrasted biological activities, mostly as antibiotics and antitumor agents, but also anti-inflammatory, antiviral, antiparasitic, immunosuppressant and neuroprotective among others. The molecular formulae of the 25 remaining compounds were determined by HRMS. None of these molecules had been previously reported in natural product databases indicating potentially novel metabolites. As a proof of concept, a new metabolite caboxamycin B (1) was isolated from the culture broth of Streptomyces sp. A-177 and its structure was determined by various spectrometric methods. To the best of our knowledge, this is the first novel natural product obtained from an atmospheric Streptomyces, thus pointing out precipitations as an innovative source for discovering new pharmaceutical natural products.
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3
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Debnath S, Ghosh S, Pandit G, Satpati P, Chatterjee S. Effect of Differential Geminal Substitution of γ Amino Acid Residues at the ( i + 2) Position of αγ Turn Segments on the Conformation of Template β-Hairpin Peptides. J Org Chem 2021; 86:11310-11323. [PMID: 34479402 DOI: 10.1021/acs.joc.1c00351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The effect of insertion of three geminally dimethyl substituted γ amino acid residues [γ2,2 (4-amino-2,2-dimethylbutanoic acid), γ3,3 (4-amino-3,3-dimethylbutanoic acid), and γ4,4 (4-amino-4,4-dimethylbutanoic acid)] at the (i + 2) position of a two-residue αγ C12 turn segment in a model octapeptide sequence Leu-Phe-Val-Aib-Xxx-Leu-Phe-Val (where Xxx = γ amino acid residues) has been investigated in this study. Solution conformational studies (NMR, CD, and IR) and ab initio calculations indicated that γ3,3 and γ4,4 residues were well accommodated in the β-hairpin nucleating αγ C12 turns, which gave rise to well-registered hairpins, in contrast to γ2,2, which was unable to form a tight C12 β-hairpin nucleating turn and promote a well-registered β-hairpin. Geminal disubstitution at the Cα carbon in γ2,2 led to unfavorable steric contacts, disabling its accommodation in the αγ C12 hairpin nucleating turn unlike the γ3,3 and γ4,4 residues. Geminal substitutions at different carbons along the backbone constrained backbone torsion angles for the three γ amino acid residues differently, generating diverse conformational preferences in them. Folded hairpins were energetically more stable (∼8 to 9 kcal/mol) than the unfolded peptides. Conformational preference of the peptides was independent of the N-terminal protecting group. Such fundamental understanding will instrumentalize the future directed design of foldamers.
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Affiliation(s)
- Swapna Debnath
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam 781039, India
| | - Suvankar Ghosh
- Biosciences and Bioengineering Indian Institute of Technology, Guwahati, Assam 781039, India
| | - Gopal Pandit
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam 781039, India
| | - Priyadarshi Satpati
- Biosciences and Bioengineering Indian Institute of Technology, Guwahati, Assam 781039, India
| | - Sunanda Chatterjee
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam 781039, India
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4
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Miyamura H, Tobita F, Suzuki A, Kobayashi S. Polymer Immobilized Bimetallic Nanoparticle Catalysts for Selective Hydrogenation of Quinones and Integration of Quinone-hydrogenation and Its Derivatization Using Sequential and Continuous-flow Systems. J SYN ORG CHEM JPN 2020. [DOI: 10.5059/yukigoseikyokaishi.78.232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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5
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Affiliation(s)
- Carmen Nájera
- Centro de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, Alicante E-03080, Spain
| | - Leiv K. Sydnes
- Department of Chemistry, University of Bergen, Allégt. 41, Bergen NO-5007, Norway
| | - Miguel Yus
- Centro de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, Alicante E-03080, Spain
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6
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Miyamura H, Tobita F, Suzuki A, Kobayashi S. Direct Synthesis of Hydroquinones from Quinones through Sequential and Continuous‐Flow Hydrogenation‐Derivatization Using Heterogeneous Au–Pt Nanoparticles as Catalysts. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Hiroyuki Miyamura
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Fumiya Tobita
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Aya Suzuki
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shū Kobayashi
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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7
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Miyamura H, Tobita F, Suzuki A, Kobayashi S. Direct Synthesis of Hydroquinones from Quinones through Sequential and Continuous‐Flow Hydrogenation‐Derivatization Using Heterogeneous Au–Pt Nanoparticles as Catalysts. Angew Chem Int Ed Engl 2019; 58:9220-9224. [DOI: 10.1002/anie.201904159] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Hiroyuki Miyamura
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Fumiya Tobita
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Aya Suzuki
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shū Kobayashi
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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8
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Jeremić S, Amić A, Stanojević-Pirković M, Marković Z. Selected anthraquinones as potential free radical scavengers and P-glycoprotein inhibitors. Org Biomol Chem 2018; 16:1890-1902. [DOI: 10.1039/c8ob00060c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this article, we estimated the scavenger capacity of six selected anthraquinones toward free radicals and their efficacy as inhibitors of P-glycoproteins.
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Affiliation(s)
- S. Jeremić
- Department of Chemical-Technological Sciences
- State University of Novi Pazar
- 36300 Novi Pazar
- Serbia
| | - A. Amić
- Department of Chemistry
- Josip Juraj Strossmayer University of Osijek
- 31000 Osijek
- Croatia
| | | | - Z. Marković
- Department of Chemical-Technological Sciences
- State University of Novi Pazar
- 36300 Novi Pazar
- Serbia
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9
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Kitamura K, Ando Y, Matsumoto T, Suzuki K. Total Synthesis of Aryl C-Glycoside Natural Products: Strategies and Tactics. Chem Rev 2017; 118:1495-1598. [DOI: 10.1021/acs.chemrev.7b00380] [Citation(s) in RCA: 149] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kei Kitamura
- Department
of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Yoshio Ando
- Department
of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Takashi Matsumoto
- School
of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1
Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Keisuke Suzuki
- Department
of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
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10
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Gotsko MD, Sobenina LN, Tomilin DN, Markova MV, Ushakov IA, Vakul’skaya TI, Khutsishvili SS, Trofimov BA. Pyrrole acetylenecarbaldehydes: an entry to a novel class of functionalized pyrroles. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.09.079] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Identification of quinones as novel PIM1 kinase inhibitors. Bioorg Med Chem Lett 2016; 26:3187-3191. [PMID: 27173800 DOI: 10.1016/j.bmcl.2016.04.079] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 04/26/2016] [Accepted: 04/27/2016] [Indexed: 01/31/2023]
Abstract
PIM1 is a proto-oncogene encoding the serine/threonine PIM1 kinase. PIM1 kinase plays important roles in regulating aspects of cell cycle progression, apoptosis resistance, and has been implicated in the development of such malignancies as prostate cancer and acute myeloid leukemia among others. Knockout of PIM1 kinase in mice has been shown to be non-lethal without any obvious phenotypic changes, making it an attractive therapeutic target. Our investigation of anthraquinones as kinase inhibitors revealed a series of quinone analogs showing high selectivity for inhibition of the PIM kinases. Molecular modeling studies were used to identify key interactions and binding poses of these compounds within the PIM1 binding pocket. Compounds 1, 4, 7 and 9 inhibited the growth of DU-145 prostate cancer cell lines with a potency of 8.21μM, 4.06μM, 3.21μM and 2.02μM.
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12
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Roy J, Mal T, Jana S, Mal D. Regiodefined synthesis of brominated hydroxyanthraquinones related to proisocrinins. Beilstein J Org Chem 2016; 12:531-6. [PMID: 27340445 PMCID: PMC4901998 DOI: 10.3762/bjoc.12.52] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 02/26/2016] [Indexed: 11/23/2022] Open
Abstract
Dibromobenzoisofuranone 12, synthesized in six steps, was regiospecifically annulated with 5-substituted cyclohexenones 13/36 in the presence of LiOt-Bu to give brominated anthraquinones 14/38 in good yields. Darzens condensation of 30 was shown to give chain-elongated anthraquinone 32. Alkaline hydrolysis of 38 furnished 39 representing desulfoproisocrinin F.
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Affiliation(s)
- Joyeeta Roy
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
| | - Tanushree Mal
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
| | - Supriti Jana
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
| | - Dipakranjan Mal
- Department of Chemistry, Indian Institute of Technology, Kharagpur- 721302, India
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13
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de Oliveira KT, Miller LZ, McQuade DT. Exploiting photooxygenations mediated by porphyrinoid photocatalysts under continuous flow conditions. RSC Adv 2016. [DOI: 10.1039/c6ra00285d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Photooxygenations of naphthols under continuous flow conditions using porphyrinoids as photocatalysts are described. Reaction conditions, long-term experiments and scope were performed, thus allowing the production of substituted naphthoquinones.
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Affiliation(s)
- Kleber T. de Oliveira
- Florida State University
- Department of Chemistry and Biochemistry
- Tallahassee
- USA
- Universidade Federal de São Carlos
| | - L. Zane Miller
- Florida State University
- Department of Chemistry and Biochemistry
- Tallahassee
- USA
| | - D. Tyler McQuade
- Florida State University
- Department of Chemistry and Biochemistry
- Tallahassee
- USA
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14
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Jones KD, Rixson JE, Skelton BW, Gericke KM, Stewart SG. The Total Synthesis of Heraclemycin B through β-Ketosulfoxide and Aldehyde Annulation. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kieran D. Jones
- School of Chemistry and Biochemistry; The University of Western Australia (M310); 35 Stirling Highway Crawley WA 6009 (Australia)
| | - James E. Rixson
- School of Chemistry and Biochemistry; The University of Western Australia (M310); 35 Stirling Highway Crawley WA 6009 (Australia)
| | - Brian W. Skelton
- Centre for Microscopy, Characterisation and Analysis; The University of Western Australia; Crawley WA 6009 Australia
| | | | - Scott G. Stewart
- School of Chemistry and Biochemistry; The University of Western Australia (M310); 35 Stirling Highway Crawley WA 6009 (Australia)
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15
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Suzuki K, Matsumoto T, Kitamura K, Ando Y, Maezawa Y. Toward the Pluramycins: Route Exploration from Dihydroxyanthrone Tricyclic Platform to an Aglycon, Saptomycinone B. HETEROCYCLES 2015. [DOI: 10.3987/com-14-s(k)106] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Chapuis C, Skuy D, de Saint Laumer JY, Brauchli R. endo/exo stereoselectivity in Diels-Alder reactions of α,β-dialkylated conjugated enals to cyclic 1,3-dienes: intermediates in the synthesis of (-)-β-santalol and its analogs. Chem Biodivers 2014; 11:1470-516. [PMID: 25329781 DOI: 10.1002/cbdv.201400060] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Indexed: 11/10/2022]
Abstract
Highly exo-selective [4+2] cycloadditions of cyclopenta-1,3-diene 2a to α,β-dialkyl conjugated enals 5 are compared with the analogous endo-favored Diels-Alder reaction of cyclohexa-1,3-diene 7. The exo-stereoselectivity is lower in the homologous case of methylcyclopenta-1,3-diene 9. This diastereoselectivity is discussed either in terms of a retro-homo-Diels-Alder reaction, associated with thermodynamic control, or with respect to either a competing hetero-Diels-Alder/Claisen or Cope domino pathway, or retro-Claisen/retro-hetero-Diels-Alder of the endo-homo-cycloadducts. These hypothetical mechanisms have been examined by DFT calculations at the MPW1K(CH2 Cl2 )/6-31+G** level of theory for the AlCl3 -mediated cycloadditions of 5d to 2a and 7. Application of Corey's methodology to the γ-halogeno-α-methyl-substituted dienophiles 5a and 5b allowed an enantioselective preparation of known and useful intermediates for the synthesis of either the naturally occurring (-)-β-santalol or its potentially olfactive structural analogs.
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Affiliation(s)
- Christian Chapuis
- Firmenich SA, Synthesis Department, Corporate R & D Division, P. O. Box 239, CH-1211 Geneva 8, (phone: +41-22-7803610; fax: +41-22-7803334).
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17
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Hartung J, Wright BJD, Danishefsky SJ. Studies toward the total synthesis of pluraflavin A. Chemistry 2014; 20:8731-6. [PMID: 24919792 PMCID: PMC4795151 DOI: 10.1002/chem.201402254] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Indexed: 11/05/2022]
Abstract
A synthetic strategy towards the potent cytostatic agent pluraflavin A has been developed. Formation of the enantioenriched anthrapyran core bearing a halogen atom enabled the introduction of the α C-aryl glycoside by Stille cross-coupling and subsequent hydrogenation of the aryl glycal. Chemo- and stereoselective O-glycosylations of α oliose and β 3-epi vancosamine residues afforded a fully glycosylated aromatic core. Attempts to install the dimethylamino group of the C-disaccharide suggest that introduction of an azide group by displacement and subsequent reduction may pave the way to the total synthesis of pluraflavin A.
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Affiliation(s)
- John Hartung
- Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027
| | | | - Samuel J. Danishefsky
- Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027
- Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, Fax: (+) (212) 772-8691
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Podlesny EE, Kozlowski MC. Divergent approach to the bisanthraquinone natural products: total synthesis of (S)-bisoranjidiol and derivatives from binaphtho-para-quinones. J Org Chem 2013; 78:466-76. [PMID: 23249414 PMCID: PMC3560291 DOI: 10.1021/jo302364h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The development of the first asymmetric synthesis of a chiral anthraquinone dimer is outlined, resulting in the first total synthesis of (S)-bisoranjidiol. Rather than a biomimetic dimerization retrosynthetic disconnection, the anthracenyl ring systems are generated after formation of the axially chiral binaphthalene framework. This synthetic strategy has enabled the synthesis of several analogues. Key features of the synthesis include the enantioselective coupling of a hindered 2-naphthol containing substitution peri to the site of C-C bond formation, the regioselective oxidation of 8,8'-hydroxylated binaphthols to binaphtho-para-quinones, and a tandem regioselective Diels-Alder/aromatization reaction.
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Affiliation(s)
- Erin E. Podlesny
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Marisa C. Kozlowski
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
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19
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Wang F, Eric Knabe W, Li L, Jo I, Mani T, Roehm H, Oh K, Li J, Khanna M, Meroueh SO. Design, synthesis, biochemical studies, cellular characterization, and structure-based computational studies of small molecules targeting the urokinase receptor. Bioorg Med Chem 2012; 20:4760-73. [PMID: 22771232 DOI: 10.1016/j.bmc.2012.06.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2012] [Revised: 05/25/2012] [Accepted: 06/01/2012] [Indexed: 11/26/2022]
Abstract
The urokinase receptor (uPAR) serves as a docking site to the serine protease urokinase-type plasminogen activator (uPA) to promote extracellular matrix (ECM) degradation and tumor invasion and metastasis. Previously, we had reported a small molecule inhibitor of the uPAR·uPA interaction that emerged from structure-based virtual screening. Here, we measure the affinity of a large number of derivatives from commercial sources. Synthesis of additional compounds was carried out to probe the role of various groups on the parent compound. Extensive structure-based computational studies suggested a binding mode for these compounds that led to a structure-activity relationship study. Cellular studies in non-small cell lung cancer (NSCLC) cell lines that include A549, H460 and H1299 showed that compounds blocked invasion, migration and adhesion. The effects on invasion of active compounds were consistent with their inhibition of uPA and MMP proteolytic activity. These compounds showed weak cytotoxicity consistent with the confined role of uPAR to metastasis.
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Affiliation(s)
- Fang Wang
- Indiana University, Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, United States
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20
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Podlesny EE, Kozlowski MC. Enantioselective total synthesis of (S)-bisoranjidiol, an axially chiral bisanthraquinone. Org Lett 2012; 14:1408-11. [PMID: 22360604 DOI: 10.1021/ol3001365] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first enantioselective total synthesis of the bisanthraquinone (S)-bisoranjidiol and an unnatural regioisomer has been accomplished. Key features of the synthesis include the asymmetric oxidative biaryl coupling of a hindered 8-substituted 2-naphthol, selective para-quinone formation, and regioselective tandem Diels-Alder/aromatization reactions.
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Affiliation(s)
- Erin E Podlesny
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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21
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O'Keefe BM, Mans DM, Kaelin DE, Martin SF. Studies Toward the Syntheses of Pluramycin Natural Products. The First Total Synthesis of Isokidamycin. Tetrahedron 2011; 67:6524-6538. [PMID: 21804649 PMCID: PMC3145363 DOI: 10.1016/j.tet.2011.05.117] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We report the first total synthesis of the complex C-aryl glycoside isokidamycin, the epimer of the naturally-occurring pluramycin antibiotic kidamycin. The synthesis features a highly efficientDiels-Alder reaction between a substituted naphthyne and a glycosylatedfuran to form the anthracene core bearing a pendant angolosamine C-glycoside. The regiochemical outcome of the Diels-Alder reaction was controlled by employing a disposable silicon-tether to link the reactive napthyne and the glycosyl furan, rendering the cycloaddition intramolecular. The benzopyranone moietyof the aromatic nucleus was appended by cyclization of a functionalized vinylogous amide onto an advanced anthrol intermediate. The vancosamine amino glycoside was introduced by an O→C-glycoside rearrangement that produced the β-anomer. Subsequent refunctionalizations then led to isokidamycin.
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Affiliation(s)
- B Michael O'Keefe
- Department of Chemistry and Biochemistry The University of Texas at Austin, 1 University Station A5300 Austin, TX 78712-0165
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22
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Neufeind S, Hülsken N, Neudörfl JM, Schlörer N, Schmalz HG. Total Synthesis of cyclo-Mumbaistatin Analogues through Anionic Homo-Fries Rearrangement. Chemistry 2011; 17:2633-41. [DOI: 10.1002/chem.201003166] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Indexed: 11/07/2022]
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23
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Padwal J, Lewis W, Moody CJ. Synthesis of the reported structure of crassiflorone, a naturally occurring quinone isolated from the African ebony Diospyros crassiflora, and regioisomeric pentacyclic furocoumarin naphthoquinones. Org Biomol Chem 2011; 9:3484-93. [DOI: 10.1039/c0ob01231a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Biswas T, Biswas T, Chattopadhyay SK. Synthesis of chiral oxa- and azacycle-fused anthraquinone derivatives. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.02.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Nicolaou KC, Becker J, Lim YH, Lemire A, Neubauer T, Montero A. Total synthesis and biological evaluation of (+)- and (-)-bisanthraquinone antibiotic BE-43472B and related compounds. J Am Chem Soc 2010; 131:14812-26. [PMID: 19778008 DOI: 10.1021/ja9073694] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The bisanthraquinone antibiotic BE-43472B [(+)-1] was isolated by Rowley and co-workers from a streptomycete strain found in a blue-green algae associated with the ascidian Ecteinascidia turbinata and has shown promising antibacterial activity against clinically derived isolates of methicillin-susceptible, methicillin-resistant, and tetracyclin-resistant Staphylococcus aureus (MSSA, MRSA, and TRSA, respectively) and vancomycin-resistant Enterococcus faecalis (VRE). Described herein is the first total synthesis of both enantiomers of this bisanthraquinone antibiotic, the determination of its absolute configuration, and the biological evaluation of these and related compounds. The developed synthesis relies on a highly efficient cascade sequence involving an intermolecular Diels-Alder reaction between diene (R)-61 and dienophile 55, followed by an intramolecular nucleophilic aromatic ipso substitution. Late-stage transformations included a remarkable photochemical alpha,beta-epoxyketone rearrangement [80 --> (+)-1]. Interestingly, the unnatural enantiomer [(-)-1] of antibiotic BE-43472B exhibited antibacterial properties comparable to those of the natural enantiomer [(+)-1].
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Affiliation(s)
- K C Nicolaou
- Department of Chemistry and The Skaggs Institute for Chemical Biology, La Jolla, California 92037, USA.
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26
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Wright BJD, Hartung J, Peng F, Van de Water R, Liu H, Tan QH, Chou TC, Danishefsky SJ. Synthesis of pluraflavin A "aglycone". J Am Chem Soc 2009; 130:16786-90. [PMID: 19049469 DOI: 10.1021/ja805936v] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The "aglycone" of pluraflavin A (2) has been synthesized. The key features of this synthesis include a 1,3-dipolar cycloaddition between a nitrile oxide (cf. 14) and an olefin (22) to yield an isoxazoline followed by subsequent conversion into the gamma-pyrone of pluraflavin A. The epoxide moiety linked to the pyrone is installed prior to Diels-Alder installation of the D ring, which allows access to a number of potentially active cytotoxic intermediates en route to the final compound. The preliminary in vitro results of two such compounds are also included with the racemic title compound exhibiting cytotoxicity in the nanomolar range.
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Affiliation(s)
- Benjamin J D Wright
- Department of Chemistry, Columbia University, Havemeyer Hall, 3000 Broadway, New York, New York 10027, USA
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Nicolaou K, Lim Y, Becker J. Total Synthesis and Absolute Configuration of the Bisanthraquinone Antibiotic BE-43472B. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200900058] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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28
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Nicolaou KC, Lim YH, Becker J. Total synthesis and absolute configuration of the bisanthraquinone antibiotic BE-43472B. Angew Chem Int Ed Engl 2009; 48:3444-8. [PMID: 19235819 PMCID: PMC2678724 DOI: 10.1002/anie.200900058] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An-T-biotic: The first total synthesis of the T-shaped bisanthraquinone natural product BE-43472B was accomplished and its absolute configuration assigned. Key transformations in the pivotal cascade sequence include a Diels-Alder reaction, a hemiketal formation, and a nucleophilic aromatic ipso substitution.
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Affiliation(s)
- K C Nicolaou
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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29
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Macklin T, Panteleev J, Snieckus V. Carbamoyl Translocations by an Anionicortho-Fries and Cumulenolate α-Acylation Pathway: Regioselective Synthesis of Polysubstituted Chromone 3- and 8-Carboxamides. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200704360] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Macklin T, Panteleev J, Snieckus V. Carbamoyl Translocations by an Anionicortho-Fries and Cumulenolate α-Acylation Pathway: Regioselective Synthesis of Polysubstituted Chromone 3- and 8-Carboxamides. Angew Chem Int Ed Engl 2008; 47:2097-101. [DOI: 10.1002/anie.200704360] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Tietze LF, Singidi RR, Gericke KM, Böckemeier H, Laatsch H. Isolation, Enantioselective Total Synthesis and Structure Determination of the Anthrapyran Metabolite SS 43405-e. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700534] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Tietze LF, Singidi RR, Gericke KM. Total Synthesis of the Proposed Structure of the Anthrapyran Metabolite δ-Indomycinone. Chemistry 2007; 13:9939-47. [PMID: 17886848 DOI: 10.1002/chem.200700823] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The first total synthesis of the proposed structure of delta-indomycinone has been accomplished. The key steps involve the Diels-Alder reaction of a bromonaphthoquinone (6) and 1-methoxy-3-methyl-1-trimethylsiloxy-1,3-butadiene (7) to access the anthraquinone skeleton, representing a common building block of other naturally occurring anthraquinone antibiotics, regioselective bromination of anthraquinone (14) and a highly diastereoselective alkylation of enantiomerically pure dioxolanone 8. The reported synthetic approach has the advantage of high yields, excellent selectivity and a remarkable general applicability for the total synthesis of other anthrapyran natural products. The spectroscopic data obtained for the synthetic compounds 2 and 36 are not in agreement with those reported for the natural product, and therefore revision of the assigned structure is required.
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Affiliation(s)
- Lutz F Tietze
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammannstrasse 2, Göttingen, Germany.
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Tietze LF, Gericke KM, Schuberth I. Synthesis of Highly Functionalized Anthraquinones and Evaluation of Their Antitumor Activity. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700418] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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