1
|
Linne Y, Bonandi E, Tabet C, Geldsetzer J, Kalesse M. The Total Synthesis of Chondrochloren A. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016072] [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]
Affiliation(s)
- Yannick Linne
- Institute for Organic Chemistry Gottfried Wilhelm Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Germany
| | - Elisa Bonandi
- Institute for Organic Chemistry Gottfried Wilhelm Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Germany
| | - Christopher Tabet
- Institute for Organic Chemistry Gottfried Wilhelm Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Germany
| | - Jan Geldsetzer
- Helmholtz Centre for Infection Research (HZI) Inhoffenstrasse 7 38124 Braunschweig Germany
| | - Markus Kalesse
- Institute for Organic Chemistry Gottfried Wilhelm Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Germany
- Centre of Biomolecular Drug Research (BMWZ) Gottfried Wilhelm Leibniz Universität Hannover Schneiderberg 38 30167 Hannover Germany
- Helmholtz Centre for Infection Research (HZI) Inhoffenstrasse 7 38124 Braunschweig Germany
| |
Collapse
|
2
|
Linne Y, Bonandi E, Tabet C, Geldsetzer J, Kalesse M. The Total Synthesis of Chondrochloren A. Angew Chem Int Ed Engl 2021; 60:6938-6942. [PMID: 33450788 PMCID: PMC8048958 DOI: 10.1002/anie.202016072] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/13/2021] [Indexed: 12/01/2022]
Abstract
The first total synthesis of chondrochloren A is accomplished using a 1,2‐metallate rearrangement addition as an alternative for the Nozaki‐Hiyama‐Kishi reaction. This transformation also avoids the inherent challenges of this polyketide segment and provides a new, unprecedented strategy to assemble polyketidal frameworks. The formation of the Z‐enamide is accomplished using a Z‐selective cross coupling of the corresponding amide to a Z‐vinyl bromide.
Collapse
Affiliation(s)
- Yannick Linne
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Elisa Bonandi
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Christopher Tabet
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Jan Geldsetzer
- Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
| | - Markus Kalesse
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany.,Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
| |
Collapse
|
3
|
Linne Y, Schönwald A, Weißbach S, Kalesse M. Desymmetrization of C 2 -Symmetric Bis(Boronic Esters) by Zweifel Olefinations. Chemistry 2020; 26:7998-8002. [PMID: 32068298 PMCID: PMC7384159 DOI: 10.1002/chem.202000599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Indexed: 02/05/2023]
Abstract
anti‐Configured 1,3‐dimethyl deoxypropionate motifs are important sub structures in natural products. Herein, we describe a bidirectional approach for the rapid construction of natural products featuring such motifs by using C2‐symmetrical 1,3‐bis(boronic esters). As for its application in convergent syntheses it was important to establish a selective mono‐Zweifel olefination we describe the scope and limitations by using different 1,3‐bis(boronic esters) and nucleophiles. This protocol takes advantage of the combination of the Hoppe–Matteson–Zweifel chemistry, which was elegantly put into practice by Aggarwal et al. In order to show its applicability the total syntheses of two natural products, serricornin and (+)‐invictolide, were performed.
Collapse
Affiliation(s)
- Yannick Linne
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany
| | - Axel Schönwald
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Sebastian Weißbach
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Markus Kalesse
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany.,Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
| |
Collapse
|
4
|
Lücke D, Kalesse M. Polyoxygenated Tertiary Alcohols: A Kiyooka Approach. Chemistry 2019; 25:10080-10083. [PMID: 31173411 DOI: 10.1002/chem.201902589] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Indexed: 01/29/2023]
Abstract
A Kiyooka aldol approach for the stereoselective synthesis of tertiary alcohols is presented. This approach allows for the incorporation of different substituents at all three remaining positions at the chiral center bearing the tertiary alcohol. To demonstrate the validity of this approach different chiral alcohols were depicted and the relationship of double bond geometry of the ketene acetal and the diastereoselectivity was established.
Collapse
Affiliation(s)
- Daniel Lücke
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Markus Kalesse
- Institute for Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
| |
Collapse
|
5
|
Surup F, Kuhnert E, Böhm A, Pendzialek T, Solga D, Wiebach V, Engler H, Berkessel A, Stadler M, Kalesse M. The Rickiols: 20-, 22-, and 24-membered Macrolides from the Ascomycete Hypoxylon rickii. Chemistry 2018; 24:2200-2213. [PMID: 29168908 DOI: 10.1002/chem.201704928] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Indexed: 11/10/2022]
Abstract
In preceding studies the neotropical ascomycete Hypoxylon rickii turned out to be a prolific source of new secondary metabolites, considering that we had obtained terpenoids with five different scaffolds along with a series of terphenyls. From the mycelial extracts of a 70 L scale fermentation of this strain we additionally isolated nine new macrolides (1-9) by RP-HPLC. The planar structures were elucidated by NMR spectroscopy complemented by HR-ESIMS. The relative configurations were assigned by J-based configuration analyses and confirmed by Kishi's Universal Database. Subsequently, the absolute configurations were assigned by Mosher's method using the shift analysis of a tetra-MTPA derivative. For rickiol A (1) and E (5) we observed transesterification of 20-membered ring structures to 22-membered isomers rickiol A2 (6) and E2 (7), and to 24-membered isomers rickiol A3 (8) and rickiol E3 (9), respectively. Cytotoxic effects and moderate antibiotic activity against Gram-positive bacteria were observed for 1-8 and 1-6 and 8, respectively. The total synthesis of rickiol E3 (9) established easier access to these compounds.
Collapse
Affiliation(s)
- Frank Surup
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany.,Partner site Hannover-Braunschweig, German Centre for Infection Research Association (DZIF), Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Eric Kuhnert
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Andreas Böhm
- Institute for Organic Chemistry, Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Drug Research (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Tim Pendzialek
- Institute for Organic Chemistry, Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Drug Research (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Danny Solga
- Institute for Organic Chemistry, Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Drug Research (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Vincent Wiebach
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany.,Institut für Chemie, Technische Universität Berlin, Müller-Breslau-Straße 10, 10623, Berlin, Germany
| | - Hauke Engler
- Department of Chemistry, Organic Chemistry, Cologne University, Greinstraße 4, 50939, Cologne, Germany
| | - Albrecht Berkessel
- Department of Chemistry, Organic Chemistry, Cologne University, Greinstraße 4, 50939, Cologne, Germany
| | - Marc Stadler
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany.,Partner site Hannover-Braunschweig, German Centre for Infection Research Association (DZIF), Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Markus Kalesse
- Institute for Organic Chemistry, Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Drug Research (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Medicinal Chemistry, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124, Braunschweig, Germany
| |
Collapse
|
6
|
Witte SNR, Hug JJ, Géraldy MNE, Müller R, Kalesse M. Biosynthesis and Total Synthesis of Pyrronazol B: a Secondary Metabolite fromNannocystis pusilla. Chemistry 2017; 23:15917-15921. [DOI: 10.1002/chem.201703782] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Swjatoslaw N. R. Witte
- Institute for Organic Chemistry; Leibniz University Hannover; Schneiderberg 1B 30167 Hannover Germany
- Centre of Biomolecular Drug Research (BMWZ); Schneiderberg 38 30167 Hannover Germany
- Germany and Helmholtz Centre for Infection Research GmbH (HZI); Inhoffenstraße 7 38124 Braunschweig Germany
| | - Joachim J. Hug
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS); Helmholtz Centre for Infection Research (HZI) Saarland University Campus, Building E8.1; 66123 Saarbrücken Germany
| | - Magalie N. E. Géraldy
- Institute for Organic Chemistry; Leibniz University Hannover; Schneiderberg 1B 30167 Hannover Germany
- Centre of Biomolecular Drug Research (BMWZ); Schneiderberg 38 30167 Hannover Germany
- Germany and Helmholtz Centre for Infection Research GmbH (HZI); Inhoffenstraße 7 38124 Braunschweig Germany
- Deutsches Krebsforschungszentrum; Im Neuenheimer Feld 580 D-69120 Heidelberg Germany
| | - Rolf Müller
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS); Helmholtz Centre for Infection Research (HZI) Saarland University Campus, Building E8.1; 66123 Saarbrücken Germany
| | - Markus Kalesse
- Institute for Organic Chemistry; Leibniz University Hannover; Schneiderberg 1B 30167 Hannover Germany
- Centre of Biomolecular Drug Research (BMWZ); Schneiderberg 38 30167 Hannover Germany
- Germany and Helmholtz Centre for Infection Research GmbH (HZI); Inhoffenstraße 7 38124 Braunschweig Germany
| |
Collapse
|
7
|
Petermichl M, Schobert R. Total Synthesis of the Diglycosidic Tetramic Acid Ancorinoside A. Chemistry 2017; 23:14743-14746. [DOI: 10.1002/chem.201704379] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Markus Petermichl
- Department of Chemistry; University Bayreuth; Universitaetsstr. 30 95447 Bayreuth Germany
| | - Rainer Schobert
- Department of Chemistry; University Bayreuth; Universitaetsstr. 30 95447 Bayreuth Germany
| |
Collapse
|
8
|
Steinmetz H, Li J, Fu C, Zaburannyi N, Kunze B, Harmrolfs K, Schmitt V, Herrmann J, Reichenbach H, Höfle G, Kalesse M, Müller R. Isolation, Structure Elucidation, and (Bio)Synthesis of Haprolid, a Cell-Type-Specific Myxobacterial Cytotoxin. Angew Chem Int Ed Engl 2016; 55:10113-7. [PMID: 27404448 DOI: 10.1002/anie.201603288] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Indexed: 11/09/2022]
Abstract
Myxobacteria are well-established sources for novel natural products exhibiting intriguing bioactivities. We here report on haprolid (1) isolated from Byssovorax cruenta Har1. The compound exhibits an unprecedented macrolactone comprising four modified amino acids and a polyketide fragment. As configurational assignment proved difficult, a bioinformatic analysis of the biosynthetic gene cluster was chosen to predict the configuration of each stereocenter. In-depth analysis of the corresponding biosynthetic proteins established a hybrid polyketide synthase/nonribosomal peptide synthetase origin of haprolid and allowed for stereochemical assignments. A subsequent total synthesis yielded haprolid and corroborated all predictions made. Intriguingly, haprolid showed cytotoxicity against several cell lines in the nanomolar range whereas other cells were almost unaffected by treatment with the compound.
Collapse
Affiliation(s)
- Heinrich Steinmetz
- Helmholtz Center for Infection Research (HZI), Department Microbial Drugs, Inhoffenstrasse 7, 38124, Braunschweig, Germany
| | - Jun Li
- Institute for Organic Chemistry, Gottfried Leibniz Universität Hannover.,Centre of Biomolecular Drug Research (BMWZ), Schneiderberg 1B, 30167, Hannover, Germany.,Helmholtz Center for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
| | - Chengzhang Fu
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research and Pharmaceutical Biotechnology, Saarland University, Campus Building E8.1, 66123, Saarbrücken, Germany
| | - Nestor Zaburannyi
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research and Pharmaceutical Biotechnology, Saarland University, Campus Building E8.1, 66123, Saarbrücken, Germany
| | - Birgitte Kunze
- Helmholtz Center for Infection Research (HZI), Department Microbial Drugs, Inhoffenstrasse 7, 38124, Braunschweig, Germany
| | - Kirsten Harmrolfs
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research and Pharmaceutical Biotechnology, Saarland University, Campus Building E8.1, 66123, Saarbrücken, Germany
| | - Viktoria Schmitt
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research and Pharmaceutical Biotechnology, Saarland University, Campus Building E8.1, 66123, Saarbrücken, Germany
| | - Jennifer Herrmann
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research and Pharmaceutical Biotechnology, Saarland University, Campus Building E8.1, 66123, Saarbrücken, Germany
| | - Hans Reichenbach
- Helmholtz Center for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
| | - Gerhard Höfle
- Helmholtz Center for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
| | - Markus Kalesse
- Institute for Organic Chemistry, Gottfried Leibniz Universität Hannover. .,Centre of Biomolecular Drug Research (BMWZ), Schneiderberg 1B, 30167, Hannover, Germany. .,Helmholtz Center for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany.
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research and Pharmaceutical Biotechnology, Saarland University, Campus Building E8.1, 66123, Saarbrücken, Germany.
| |
Collapse
|
9
|
Steinmetz H, Li J, Fu C, Zaburannyi N, Kunze B, Harmrolfs K, Schmitt V, Herrmann J, Reichenbach H, Höfle G, Kalesse M, Müller R. Isolierung, Strukturaufklärung und (Bio-)Synthese von Haprolid, einem zellspezifisch zytotoxischen myxobakteriellen Makrolidnaturstoff. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603288] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Heinrich Steinmetz
- Helmholtz-Zentrum für Infektionsforschung (HZI); Forschungsgruppe Mikrobielle Wirkstoffe; Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Jun Li
- Institut für Organische Chemie; Gottfried Wilhelm Leibniz Universität Hannover
- Biomolekulares Wirkstoffzentrum (BMWZ); Schneiderberg 1B 30167 Hannover Deutschland
- Helmholtz-Zentrum für Infektionsforschung (HZI); Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Chengzhang Fu
- Helmholtz-Institut für Pharmazeutische Forschung Saarland (HIPS), Helmholtz-Zentrum für Infektionsforschung und Pharmazeutische Biotechnologie; Universitätscampus E8.1; 66123 Saarbrücken Deutschland
| | - Nestor Zaburannyi
- Helmholtz-Institut für Pharmazeutische Forschung Saarland (HIPS), Helmholtz-Zentrum für Infektionsforschung und Pharmazeutische Biotechnologie; Universitätscampus E8.1; 66123 Saarbrücken Deutschland
| | - Birgitte Kunze
- Helmholtz-Zentrum für Infektionsforschung (HZI); Forschungsgruppe Mikrobielle Wirkstoffe; Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Kirsten Harmrolfs
- Helmholtz-Institut für Pharmazeutische Forschung Saarland (HIPS), Helmholtz-Zentrum für Infektionsforschung und Pharmazeutische Biotechnologie; Universitätscampus E8.1; 66123 Saarbrücken Deutschland
| | - Viktoria Schmitt
- Helmholtz-Institut für Pharmazeutische Forschung Saarland (HIPS), Helmholtz-Zentrum für Infektionsforschung und Pharmazeutische Biotechnologie; Universitätscampus E8.1; 66123 Saarbrücken Deutschland
| | - Jennifer Herrmann
- Helmholtz-Institut für Pharmazeutische Forschung Saarland (HIPS), Helmholtz-Zentrum für Infektionsforschung und Pharmazeutische Biotechnologie; Universitätscampus E8.1; 66123 Saarbrücken Deutschland
| | - Hans Reichenbach
- Helmholtz-Zentrum für Infektionsforschung (HZI); Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Gerhard Höfle
- Helmholtz-Zentrum für Infektionsforschung (HZI); Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Markus Kalesse
- Institut für Organische Chemie; Gottfried Wilhelm Leibniz Universität Hannover
- Biomolekulares Wirkstoffzentrum (BMWZ); Schneiderberg 1B 30167 Hannover Deutschland
- Helmholtz-Zentrum für Infektionsforschung (HZI); Inhoffenstraße 7 38124 Braunschweig Deutschland
| | - Rolf Müller
- Helmholtz-Institut für Pharmazeutische Forschung Saarland (HIPS), Helmholtz-Zentrum für Infektionsforschung und Pharmazeutische Biotechnologie; Universitätscampus E8.1; 66123 Saarbrücken Deutschland
| |
Collapse
|
10
|
Petermichl M, Loscher S, Schobert R. Total Synthesis of Aurantoside G, anN-β-Glycosylated 3-Oligoenoyltetramic Acid fromTheonella swinhoei. Angew Chem Int Ed Engl 2016; 55:10122-5. [DOI: 10.1002/anie.201604912] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Indexed: 01/30/2023]
Affiliation(s)
- Markus Petermichl
- Organic Chemistry Laboratory; University Bayreuth; Universitaetsstr. 30 95447 Bayreuth Germany
| | - Sebastian Loscher
- Organic Chemistry Laboratory; University Bayreuth; Universitaetsstr. 30 95447 Bayreuth Germany
| | - Rainer Schobert
- Organic Chemistry Laboratory; University Bayreuth; Universitaetsstr. 30 95447 Bayreuth Germany
| |
Collapse
|
11
|
Petermichl M, Loscher S, Schobert R. Totalsynthese von Aurantosid G, einer N-β-glycosylierten 3-Oligoenoyltetramsäure ausTheonella swinhoei. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604912] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Markus Petermichl
- Lehrstuhl für Organische Chemie; Universität Bayreuth; Universitätsstraße 30 95447 Bayreuth Deutschland
| | - Sebastian Loscher
- Lehrstuhl für Organische Chemie; Universität Bayreuth; Universitätsstraße 30 95447 Bayreuth Deutschland
| | - Rainer Schobert
- Lehrstuhl für Organische Chemie; Universität Bayreuth; Universitätsstraße 30 95447 Bayreuth Deutschland
| |
Collapse
|
12
|
Healy AR, Izumikawa M, Slawin AMZ, Shin-ya K, Westwood NJ. Stereochemical assignment of the protein-protein interaction inhibitor JBIR-22 by total synthesis. Angew Chem Int Ed Engl 2015; 54:4046-50. [PMID: 25650886 PMCID: PMC4441253 DOI: 10.1002/anie.201411141] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Indexed: 12/04/2022]
Abstract
Recent reports have highlighted the biological activity associated with a subfamily of the tetramic acid class of natural products. Despite the fact that members of this subfamily act as protein-protein interaction inhibitors that are of relevance to proteasome assembly, no synthetic work has been reported. This may be due to the fact that this subfamily contains an unnatural 4,4-disubstitued glutamic acid, the synthesis of which provides a key challenge. A highly stereoselective route to a masked form of this unnatural amino acid now enabled the synthesis of two of the possible diastereomers of JBIR-22 and allowed the assignment of its relative and absolute stereochemistry.
Collapse
Affiliation(s)
- Alan R Healy
- School of Chemistry and Biomedical Sciences Research Complex, University of St Andrews and EaStCHEMNorth Haugh, St Andrews, Fife (UK)
| | - Miho Izumikawa
- Japan Biological Informatics Consortium (JBIC) 2-4-7 Aomi, Koto-kuTokyo 135-0064 (Japan)
| | - Alexandra M Z Slawin
- School of Chemistry and Biomedical Sciences Research Complex, University of St Andrews and EaStCHEMNorth Haugh, St Andrews, Fife (UK)
| | - Kazuo Shin-ya
- National Institute of Advanced Industrial Science and Technology (AIST)2-4-7 Aomi, Koto-ku, Tokyo 135-0064 (Japan)
| | - Nicholas J Westwood
- School of Chemistry and Biomedical Sciences Research Complex, University of St Andrews and EaStCHEMNorth Haugh, St Andrews, Fife (UK)
| |
Collapse
|
13
|
Healy AR, Izumikawa M, Slawin AMZ, Shin‐ya K, Westwood NJ. Stereochemical Assignment of the Protein-Protein Interaction Inhibitor JBIR-22 by Total Synthesis. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 127:4118-4122. [PMID: 27087707 PMCID: PMC4780591 DOI: 10.1002/ange.201411141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Indexed: 11/06/2022]
Abstract
Recent reports have highlighted the biological activity associated with a subfamily of the tetramic acid class of natural products. Despite the fact that members of this subfamily act as protein-protein interaction inhibitors that are of relevance to proteasome assembly, no synthetic work has been reported. This may be due to the fact that this subfamily contains an unnatural 4,4-disubstitued glutamic acid, the synthesis of which provides a key challenge. A highly stereoselective route to a masked form of this unnatural amino acid now enabled the synthesis of two of the possible diastereomers of JBIR-22 and allowed the assignment of its relative and absolute stereochemistry.
Collapse
|
14
|
Lu HH, Hinkelmann B, Tautz T, Li J, Sasse F, Franke R, Kalesse M. Paleo-soraphens: chemical total syntheses and biological studies. Org Biomol Chem 2015; 13:8029-36. [DOI: 10.1039/c5ob01249j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To provide a picture of the hypothetical evolutionary optimization of soraphen four additional paleo-soraphens and their biological profiles are described.
Collapse
Affiliation(s)
- Hai-Hua Lu
- Institute for Organic Chemistry and Centre for Biomolecular Drug Research (BMWZ)
- Leibniz Universität Hannover
- 30167 Hannover
- Germany
| | - Bettina Hinkelmann
- Department of Chemical Biology
- Helmholtz Centre for Infection Research (HZI)
- Braunschweig
- Germany
| | - Thomas Tautz
- Institute for Organic Chemistry and Centre for Biomolecular Drug Research (BMWZ)
- Leibniz Universität Hannover
- 30167 Hannover
- Germany
| | - Jun Li
- Institute for Organic Chemistry and Centre for Biomolecular Drug Research (BMWZ)
- Leibniz Universität Hannover
- 30167 Hannover
- Germany
| | - Florenz Sasse
- Department of Chemical Biology
- Helmholtz Centre for Infection Research (HZI)
- Braunschweig
- Germany
| | - Raimo Franke
- Department of Chemical Biology
- Helmholtz Centre for Infection Research (HZI)
- Braunschweig
- Germany
| | - Markus Kalesse
- Institute for Organic Chemistry and Centre for Biomolecular Drug Research (BMWZ)
- Leibniz Universität Hannover
- 30167 Hannover
- Germany
- Department of Chemical Biology
| |
Collapse
|