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Donges J, Hofmann S, Brüggemann M, Frank A, Schollmeyer D, Nubbemeyer U. Synthesis of (+) and (‐)‐Streptomyces coelicolor Butanolide 5 (SCB‐5). European J Org Chem 2021. [DOI: 10.1002/ejoc.202100497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jonas Donges
- Organische Chemie Johannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Sandra Hofmann
- Konrad-Adenauer-Gymnasium Wörthstr. 16 56457 Westerburg Germany
| | - Moritz Brüggemann
- Shimadzu Deutschland GmbH Im Leuschnerpark 4 64347 Griesheim Germany
| | - Andrea Frank
- Organische Chemie Johannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Dieter Schollmeyer
- Organische Chemie Johannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Udo Nubbemeyer
- Organische Chemie Johannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
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Siitonen JH, Yu L, Danielsson J, Di Gregorio G, Somfai P. Formal Synthesis of ent-Cephalotaxine Using a One-Pot Parham-Aldol Sequence. J Org Chem 2018; 83:11318-11322. [PMID: 30015484 DOI: 10.1021/acs.joc.8b01540] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A short formal synthesis of ent-Cephalotaxine is achieved. The approach features a new Lewis acid-mediated [2,3]-Stevens rearrangement of N-allylated prolineamide to generate a key quaternary stereogenic center. Additionally, a one-pot Parham-aldol sequence was developed to rapidly assemble two of the four rings in the cephalotaxine core.
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Affiliation(s)
- Juha H Siitonen
- Center for Analysis and Synthesis, Department of Chemistry , Lund University , Box 124, 221 00 Lund , Sweden
| | - Lu Yu
- Center for Analysis and Synthesis, Department of Chemistry , Lund University , Box 124, 221 00 Lund , Sweden
| | - Jakob Danielsson
- Center for Analysis and Synthesis, Department of Chemistry , Lund University , Box 124, 221 00 Lund , Sweden
| | - Giovanni Di Gregorio
- Center for Analysis and Synthesis, Department of Chemistry , Lund University , Box 124, 221 00 Lund , Sweden
| | - Peter Somfai
- Center for Analysis and Synthesis, Department of Chemistry , Lund University , Box 124, 221 00 Lund , Sweden
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Xin YX, Pan S, Huang Y, Xu XH, Qing FL. Copper-Catalyzed Sulfenylation, Sulfonylation, and Selenylation of 2,3-Allenoic Acids with Disulfides or Diselenides. J Org Chem 2018; 83:6101-6109. [DOI: 10.1021/acs.joc.8b00858] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ya-Xun Xin
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, 2999 North Renmin Lu, Shanghai 201620, China
| | - Shen Pan
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, 2999 North Renmin Lu, Shanghai 201620, China
| | - Yangen Huang
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, 2999 North Renmin Lu, Shanghai 201620, China
| | - Xiu-Hua Xu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Feng-Ling Qing
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, 2999 North Renmin Lu, Shanghai 201620, China
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
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Santos D, Ariza X, Garcia J, Lloyd-Williams P, Martínez-Laporta A, Sánchez C. Total Synthesis of (−)-Isoavenaciolide. J Org Chem 2013; 78:1519-24. [DOI: 10.1021/jo302598h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David Santos
- Departament de Química Orgànica
and Institut de Biomedicina de la Universitat de Barcelona (IBUB),
Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, 08028-Barcelona, Spain
| | - Xavier Ariza
- Departament de Química Orgànica
and Institut de Biomedicina de la Universitat de Barcelona (IBUB),
Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, 08028-Barcelona, Spain
| | - Jordi Garcia
- Departament de Química Orgànica
and Institut de Biomedicina de la Universitat de Barcelona (IBUB),
Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, 08028-Barcelona, Spain
| | - Paul Lloyd-Williams
- Departament de Química Orgànica
and Institut de Biomedicina de la Universitat de Barcelona (IBUB),
Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, 08028-Barcelona, Spain
| | - Agustín Martínez-Laporta
- Departament de Química Orgànica
and Institut de Biomedicina de la Universitat de Barcelona (IBUB),
Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, 08028-Barcelona, Spain
| | - Carolina Sánchez
- Departament de Química Orgànica
and Institut de Biomedicina de la Universitat de Barcelona (IBUB),
Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, 08028-Barcelona, Spain
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Friedemann NM, Härter A, Brandes S, Groß S, Gerlach D, Münch W, Schollmeyer D, Nubbemeyer U. Zwitterionic Aza-Claisen Rearrangements Controlled by Pyrrolidine Auxiliaries - Useful Key Steps in Convergent Enantioselective Syntheses. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200073] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Sharma GVM, Chary DH, Chandramouli N, Achrainer F, Patrudu S, Zipse H. Free radical 5-exo-dig cyclization as the key step in the synthesis of bis-butyrolactone natural products: experimental and theoretical studies. Org Biomol Chem 2011; 9:4079-84. [PMID: 21494735 DOI: 10.1039/c1ob00019e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Radical cyclization reactions were performed by 5-exo-dig mode to yield cis-fused bicyclic systems, leading to the synthesis of bis-butyrolactone class of natural products. The study was aimed at understanding the impact of alkyl side chains of furanoside ring systems in L-ara configuration on the radical cyclization. It was amply demonstrated by experimental studies that the increase in the length of the alkyl side chain has an effect on the cyclization: while efficient cyclization reactions could be realized with methyl and ethyl side chains, the yields were significantly reduced in the case of n-pentyl side chain. Theoretical studies using DFT and (RO)MP2 methods were carried out to analyze the influence of the substitution pattern on the cyclization barriers.
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Affiliation(s)
- Gangavaram V M Sharma
- Organic Chemistry Division III, Indian Institute of Chemical Technology (CSIR), Hyderabad, India.
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Castelo-Branco PA, Rubinger MMM, Guilardi S, Leite VM, dos Santos AR, de C Alves L, Lariucci C, Vencato I, Piló-Veloso D, Zambolim L. Synthesis, characterization, absolute structural determination and antifungal activity of a new chlorinated aromatic avenaciolide analogue. PEST MANAGEMENT SCIENCE 2009; 65:34-40. [PMID: 18785221 DOI: 10.1002/ps.1640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
BACKGROUND Avenaciolide, a natural product isolated from Aspergillus avenaceus H. Smith, possesses several interesting biological properties, such as antifungal and antibacterial activities and inhibition of glutamate transport in mitochondria. In a study aiming to discover new compounds with antifungal activity, a bis-gamma-lactone analogous to avenaciolide was prepared and characterized by elemental analysis, mass spectrometry, and infrared and NMR spectroscopy. RESULTS The absolute structures of this compound and of the synthetic precursor (also a bis-gamma-lactone) were determined by X-ray diffraction analysis. The bis-gamma-lactones synthesized crystallize in the orthorhombic space group P2(1)2(1)2(1), and the crystal packings are supported by C--H...O hydrogen bonds. The compound showed antifungal activity against Colletotrichum gloeosporioides (Penz.) Penz. & Sacc., while the synthetic precursor was inactive under the in vitro test conditions employed. CONCLUSION The results indicate that it is not only the bis-gamma-lactone skeleton that is important to antifungal activity. The latter also depends on the presence of the exocyclic double bond possibly due to a Michael addition type reaction with the fungal enzymes.
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Tato F, Reboul V, Metzner P. A Novel Synthesis of 1-Nosyl 3,3-Dichloro-β-Lactams and Derivatives. J Org Chem 2008; 73:7837-40. [DOI: 10.1021/jo8014193] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Francisco Tato
- Laboratoire de Chimie Moléculaire et Thio-organique, ENSICAEN, Université de Caen Basse-Normandie, CNRS, 6, Boulevard du Maréchal Juin, 14050, Caen, France
| | - Vincent Reboul
- Laboratoire de Chimie Moléculaire et Thio-organique, ENSICAEN, Université de Caen Basse-Normandie, CNRS, 6, Boulevard du Maréchal Juin, 14050, Caen, France
| | - Patrick Metzner
- Laboratoire de Chimie Moléculaire et Thio-organique, ENSICAEN, Université de Caen Basse-Normandie, CNRS, 6, Boulevard du Maréchal Juin, 14050, Caen, France
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