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Laschat S, Deimling M, Zens A, Park N, Hess C, Klenk S, Dilruba Z, Baro A. Adventures and Detours in the Synthesis of Hydropentalenes. Synlett 2021. [DOI: 10.1055/s-0040-1707226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Functionalized hydropentalenes (i.e., bicyclo[3.3.0]octanones) constitute important building blocks for natural products and for ligands for asymmetric catalysis. The assembly and tailored functionalization of this convex roof-shaped scaffold is challenging and has motivated a variety of synthetic approaches including our own contributions, which will be presented in this account.1 Introduction2 Biosynthesis of Hydropentalenes3 Hydropentalenes through the Pauson–Khand Reaction4 Hydropentalenes through Transannular Oxidative Cyclization of Cycloocta-1,4-diene5 Functionalization of Bicyclo[3.3.0]octan-1,4-dione to Dodecahydrocyclopenta[a]indenes6 Functionalization of Bicyclo[3.3.0]octan-1,4-diones to Crown Ether Hybrids7 Functionalization of Bicyclo[3.3.0]octan-1,4-dione to Cylindramide8 Tandem Ring-Opening Metathesis/Ring-Closing Metathesis/Cross-Metathesis of Bicyclo[2.2.1]heptanes9 Functionalization of Bicyclo[3.3.0]octan-1,4-dione to Geodin A10 Hydropentalenes through Enantioselective Desymmetrization of Weiss Diketones11 Functionalization of Weiss Diketones by Carbonyl Ene Reactions12 Functionalization of the Weiss Diketone to Cylindramide and Geodin A Core Units13 Biological Properties of Bicyclo[3.3.0]octanes14 Hydropentalenes through Vinylcyclopropane Cyclopentene Rearrangement15 Functionalization of Bicyclo[3.3.0]octanes toward Chiral Dienes16 Miscellaneous Syntheses of Hydropentalenes17 Conclusion and Outlook
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Affiliation(s)
| | - Max Deimling
- Institut für Organische Chemie, Universität Stuttgart
| | - Anna Zens
- Institut für Organische Chemie, Universität Stuttgart
| | - Natja Park
- Institut für Organische Chemie, Universität Stuttgart
| | | | - Simon Klenk
- Institut für Organische Chemie, Universität Stuttgart
| | - Zarfishan Dilruba
- Institut für Organische Chemie, Universität Stuttgart
- Department of Chemistry, University of Leicester
| | - Angelika Baro
- Institut für Organische Chemie, Universität Stuttgart
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Affiliation(s)
- Mukund Ghavre
- IntelliSyn Pharma 7171 Rue Frederick Banting Montréal, Saint-Laurent QC H4S 1Z9 Canada
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Lubanyana H, Arvidsson PI, Govender T, Kruger HG, Naicker T. Improved Synthesis and Isolation of Bedaquiline. ACS OMEGA 2020; 5:3607-3611. [PMID: 32118176 PMCID: PMC7045498 DOI: 10.1021/acsomega.9b04037] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 01/10/2020] [Indexed: 05/02/2023]
Abstract
Bedaquiline (BDQ) is the most critical pharmaceutical in the world for treating multidrug-resistant Mycobacterium tuberculosis. Despite it being highly effective, BDQ asymmetric synthesis remains a challenge. Herein, the influence of chiral bases, namely, bis(1-phenylethyl)amine, bisoxazoline, and sparteine on the diastereoselective lithiation reaction to obtain BDQ was investigated. The highest diastereoselective ratio (dr) emerged as 90:10 from the (+)-bis[(R)-1-phenylethyl] lithium amide. This is a significant improvement from the 50:50 dr achieved from the commercial synthesis. Thereafter, the desired (90:10 RS, SR) diastereomeric mixture was easily isolated via a gravity column and subjected to chiral supercritical fluid chromatography (SFC) to access the desired enantiomer (1R, 2S)-BDQ. The advantages of this procedure are enhanced diastereoselection as well as a greener, faster way to achieve excellent enantioseparation (up to 1.0 g scale).
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Affiliation(s)
- Hlengekile Lubanyana
- Catalysis
and Peptide Research Unit, University of
KwaZulu-Natal, Durban 4000, South Africa
| | - Per I. Arvidsson
- Catalysis
and Peptide Research Unit, University of
KwaZulu-Natal, Durban 4000, South Africa
- Science
for Life Laboratory, Drug Discovery & Development Platform &
Division of Translational Medicine, and Chemical Biology, Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 17177, Sweden
| | - Thavendran Govender
- Catalysis
and Peptide Research Unit, University of
KwaZulu-Natal, Durban 4000, South Africa
| | - Hendrik G. Kruger
- Catalysis
and Peptide Research Unit, University of
KwaZulu-Natal, Durban 4000, South Africa
| | - Tricia Naicker
- Catalysis
and Peptide Research Unit, University of
KwaZulu-Natal, Durban 4000, South Africa
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Mühlhäuser T, Savin A, Frey W, Baro A, Schneider AJ, Döteberg HG, Bauer F, Köhn A, Laschat S. Role of Regioisomeric Bicyclo[3.3.0]octa-2,5-diene Ligands in Rh Catalysis: Synthesis, Structural Analysis, Theoretical Study, and Application in Asymmetric 1,2- and 1,4-Additions. J Org Chem 2017; 82:13468-13480. [DOI: 10.1021/acs.joc.7b02601] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tina Mühlhäuser
- Institut
für Organische Chemie, Universität Stuttgart, Pfaffenwaldring
55, 70569 Stuttgart, Germany
| | - Alex Savin
- Institut
für Organische Chemie, Universität Stuttgart, Pfaffenwaldring
55, 70569 Stuttgart, Germany
| | - Wolfgang Frey
- Institut
für Organische Chemie, Universität Stuttgart, Pfaffenwaldring
55, 70569 Stuttgart, Germany
| | - Angelika Baro
- Institut
für Organische Chemie, Universität Stuttgart, Pfaffenwaldring
55, 70569 Stuttgart, Germany
| | - Andreas J. Schneider
- Kekulé-Institut
für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Heinz-Günter Döteberg
- HD Separation
GmbH, Industriepark Niederau, Kreuzauer Strasse 46, 52355 Düren, Germany
| | - Florian Bauer
- Institut
für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring
55, 70569 Stuttgart, Germany
| | - Andreas Köhn
- Institut
für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring
55, 70569 Stuttgart, Germany
| | - Sabine Laschat
- Institut
für Organische Chemie, Universität Stuttgart, Pfaffenwaldring
55, 70569 Stuttgart, Germany
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Lutz V, Mannchen F, Krebs M, Park N, Krüger C, Raja A, Sasse F, Baro A, Laschat S. SAR studies on hydropentalene derivatives--Important core units of biologically active tetramic acid macrolactams and ptychanolides. Bioorg Med Chem 2014; 22:3252-61. [PMID: 24856181 DOI: 10.1016/j.bmc.2014.04.063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 04/28/2014] [Accepted: 04/29/2014] [Indexed: 10/25/2022]
Abstract
Structurally diverse bicyclo[3.3.0]octanes were prepared and tested for their biological activity. Both the antiproliferative activity and the results of phenotypic characterization varied with the substitution patterns. Two derivatives displayed high inhibitory (IC50 ≤3μM) activity against the L-929 cell line, but differed in their mode of action. A cluster analysis with impedance profiling data showed the two compounds in relationship to microtubule interfering compounds. In PtK2 cells treated with both derivatives a perturbing effect on the microtubular network was observed, whereas the actin cytoskeleton in incubated PtK2 cells was disturbed only by one compound. The effects on tubulin and actin polymerization could be confirmed by in vitro polymerization experiments.
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Affiliation(s)
- Vanessa Lutz
- Institut für Organische Chemie der Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Fabian Mannchen
- Institut für Organische Chemie der Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Michael Krebs
- Institut für Organische Chemie der Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Natja Park
- Institut für Organische Chemie der Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Claudia Krüger
- Institut für Organische Chemie der Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Aruna Raja
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38124 Braunschweig, Germany
| | - Florenz Sasse
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38124 Braunschweig, Germany.
| | - Angelika Baro
- Institut für Organische Chemie der Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Sabine Laschat
- Institut für Organische Chemie der Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany.
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