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Liu JX, Li H, Zhang SP, Lu SC, Gong YL, Xu S. Strategies for the Construction of Benzobicyclo[3.2.1]octane in Natural Product Synthesis. Chemistry 2024; 30:e202303989. [PMID: 38345999 DOI: 10.1002/chem.202303989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Indexed: 03/01/2024]
Abstract
Benzobicyclo[3.2.1]octane is a cage-like unique motif containing a bicyclo[3.2.1]octane structure fused with at least one benzene ring. It is found in various natural products that exhibit structural complexities and important biological activities. The total synthesis of natural products possessing this challenging structure has received considerable attention, and great advances have been made in this field during the past 15 years. This review summarizes thus far achieved chemical syntheses and synthetic studies of natural compounds featuring the benzobicyclo[3.2.1]octane core. It focuses on strategic approaches constructing the bridged structure, aiming to provide a useful reference for inspiring further advancements in strategies and total syntheses of natural products with such a framework.
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Affiliation(s)
- Jia-Xuan Liu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, 2A Nanwei Road, Xicheng District, Beijing, 100050, China
| | - Hui Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, 2A Nanwei Road, Xicheng District, Beijing, 100050, China
| | - Shi-Peng Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, 2A Nanwei Road, Xicheng District, Beijing, 100050, China
| | - Shi-Chao Lu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, 2A Nanwei Road, Xicheng District, Beijing, 100050, China
| | - Ya-Ling Gong
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, 2A Nanwei Road, Xicheng District, Beijing, 100050, China
| | - Shu Xu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, 2A Nanwei Road, Xicheng District, Beijing, 100050, China
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Hazra G, Mishra G, Dandela R, Thirupathi B. A Method to Access Highly Functionalized Dibenzobicyclo[3.2.1]octadienones: Application to the Construction of the 6/6/5/6/6 Carbon Skeleton of Rubialatin A. J Org Chem 2022; 87:11925-11938. [PMID: 35475607 DOI: 10.1021/acs.joc.2c00340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The dibenzobicyclo[3.2.1]octadienone scaffold, which has been found in naphthocyclinones, engelharquinones, rubialatin A, etc., has been synthesized under mild transition metal-free conditions by aryne insertion reaction with 2-keto-1,3-indandiones. The application of this methodology has been demonstrated for the synthesis of the 6/6/5/6/6 scaffold of rubialatin A. 1H NMR experimental studies confirm that the reaction proceeds through the formation of benzocyclobutane followed by a 7-member carbocycle ring.
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Affiliation(s)
- Gurupada Hazra
- Department of Chemical Sciences, Indian Institute of Science Education and Research Berhampur, Transit Campus, Govt. ITI Building, NH 59, Engineering School Road, Ganjam-District, Berhampur 760010, Odisha, India
| | - Gitanjali Mishra
- Department of Chemical Sciences, Indian Institute of Science Education and Research Berhampur, Transit Campus, Govt. ITI Building, NH 59, Engineering School Road, Ganjam-District, Berhampur 760010, Odisha, India
| | - Rambabu Dandela
- Department of Industrial and Engineering Chemistry, Institute of Chemical Technology, Indianoil Odisha Campus, Samantpuri, Bhubaneswar 751013, Odisha, India
| | - Barla Thirupathi
- Department of Chemical Sciences, Indian Institute of Science Education and Research Berhampur, Transit Campus, Govt. ITI Building, NH 59, Engineering School Road, Ganjam-District, Berhampur 760010, Odisha, India
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Ando Y, Fukazawa T, Ohmori K, Suzuki K. Model Study toward Total Synthesis of Dimeric Pyranonaphthoquinones: Synthesis of Hemi-Actinorhodin. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yoshio Ando
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Takumi Fukazawa
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Ken Ohmori
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, 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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Ando Y, Fukazawa T, Ohmori K, Suzuki K. Thiolate-mediated Reductive Cyclizations: Scope, Limitation and Novel Mechanistic Insights. CHEM LETT 2020. [DOI: 10.1246/cl.200411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Yoshio Ando
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8551, Japan
| | - Takumi Fukazawa
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8551, Japan
| | - Ken Ohmori
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8551, Japan
| | - Keisuke Suzuki
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8551, Japan
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Kopp J, Brückner R. Stereoselective Total Synthesis of the Dimeric Naphthoquinonopyrano-γ-lactone (-)-Crisamicin A: Introducing the Dimerization Site by a Late-Stage Hartwig Borylation. Org Lett 2020; 22:3607-3612. [PMID: 32298125 DOI: 10.1021/acs.orglett.0c01078] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The first stereoselective total synthesis of the dimeric naphthoquinonopyrano-γ-lactone (-)-crisamicin A was realized (13 steps, 5% overall yield). 1,4,5-Trimethoxynaphthalene, reached in five known steps, was brominated at C-3 to install a but-3-enoic ester by an ensuing Heck coupling. An asymmetric Sharpless dihydroxylation followed and gave a β-hydroxy-γ-lactone with >99.9% ee. Its OH substituent and acetaldehyde established the dihydropyran ring in a completely diastereoselective oxa-Pictet-Spengler cyclization. The 2,3-fused anisole moiety allowed the C5-H bond under Hartwig's conditions to be borylated. This set the stage for engaging the resulting C5-B bond in an oxidative dimerization, which led to a binaphthohydroquinon-5-yl. The latter was advanced to synthetic crisamicin A by a double CAN oxidation (→ a binaphthoquinon-5-yl) and a double demethylation.
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Affiliation(s)
- Julia Kopp
- Institut für Organische Chemie, Albert-Ludwigs-Universität, Albertstr. 21, D-79104 Freiburg, Germany
| | - Reinhard Brückner
- Institut für Organische Chemie, Albert-Ludwigs-Universität, Albertstr. 21, D-79104 Freiburg, Germany
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Ando Y. Total Syntheses of Structurally Complex Natural Products: Potential Reactivity of Organic Molecules. J SYN ORG CHEM JPN 2020. [DOI: 10.5059/yukigoseikyokaishi.78.304] [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)
- Yoshio Ando
- Department of Chemistry, School of Science, Tokyo Institute of Technology
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Neumeyer M, Kopp J, Brückner R. Controlling the Substitution Pattern of Hexasubstituted Naphthalenes by Aryne/Siloxyfuran Diels-Alder Additions: Regio- and Stereocontrolled Synthesis of Arizonin C1 Analogs. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700195] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Markus Neumeyer
- Institut für Organische Chemie; Albert-Ludwigs-Universität; Albertstraße 21 79104 Freiburg Germany
| | - Julia Kopp
- Institut für Organische Chemie; Albert-Ludwigs-Universität; Albertstraße 21 79104 Freiburg Germany
| | - Reinhard Brückner
- Institut für Organische Chemie; Albert-Ludwigs-Universität; Albertstraße 21 79104 Freiburg Germany
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Neumeyer M, Brückner R. Establishing Consensus Stereostructures for the Naphthoquinonopyrano-γ-lactone Natural Products (-)-Arizonin B1 and (-)-Arizonin C1 by Total Syntheses. Diastereocontrol of Oxa-Pictet-Spengler Cyclizations by Protective-Group Optimization. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Markus Neumeyer
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstraße 21 79104 Freiburg Germany
| | - Reinhard Brückner
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstraße 21 79104 Freiburg Germany
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Fukazawa T, Ando Y, Ohmori K, Hayashi T, Suzuki K. Enantioselective Access to Bicyclo[3.2.1]octadienone Skeleton: Total Syntheses of (+)-Engelharquinone and Its Epoxide. Org Lett 2017; 19:1470-1473. [DOI: 10.1021/acs.orglett.7b00464] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takumi Fukazawa
- Department
of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Yoshio Ando
- Department
of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Ken Ohmori
- Department
of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Tamio Hayashi
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Keisuke Suzuki
- Department
of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
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Neumeyer M, Brückner R. First Stereoselective Total Synthesis of a Dimeric Naphthoquinonopyrano-γ-lactone: (+)-γ-Actinorhodin. Angew Chem Int Ed Engl 2017; 56:3383-3388. [DOI: 10.1002/anie.201611183] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Markus Neumeyer
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstrasse 21 79104 Freiburg Germany
| | - Reinhard Brückner
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstrasse 21 79104 Freiburg Germany
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Neumeyer M, Brückner R. Die erste stereoselektive Totalsynthese eines dimeren γ-Lacton- anellierten Pyranonaphthochinons: (+)-γ-Actinorhodin. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611183] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Markus Neumeyer
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstraße 21 79104 Freiburg Deutschland
| | - Reinhard Brückner
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstraße 21 79104 Freiburg Deutschland
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Fernandes RA, Patil PH, Chaudhari DA. Dimeric Pyranonaphthoquinones: Isolation, Bioactivity, and Synthetic Approaches. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600544] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Rodney A. Fernandes
- Department of Chemistry; Indian Institute of Technology Bombay; Powai 400076 Mumbai Maharashtra India
| | - Pradnya H. Patil
- Department of Chemistry; Indian Institute of Technology Bombay; Powai 400076 Mumbai Maharashtra India
| | - Dipali A. Chaudhari
- Department of Chemistry; Indian Institute of Technology Bombay; Powai 400076 Mumbai Maharashtra India
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Ando Y, Hori S, Fukazawa T, Ohmori K, Suzuki K. Toward Naphthocyclinones: Doubly Connected Octaketide Dimers with a Bicyclo[3.2.1]octadienone Core by Thiolate-Mediated Cyclization. Angew Chem Int Ed Engl 2015; 54:9650-3. [DOI: 10.1002/anie.201503442] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 05/02/2015] [Indexed: 11/06/2022]
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14
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Ando Y, Hori S, Fukazawa T, Ohmori K, Suzuki K. Toward Naphthocyclinones: Doubly Connected Octaketide Dimers with a Bicyclo[3.2.1]octadienone Core by Thiolate-Mediated Cyclization. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503442] [Citation(s) in RCA: 7] [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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15
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Antibacterial and antifungal activity of lawsone and novel naphthoquinone derivatives. Med Mal Infect 2012; 42:270-5. [PMID: 22682997 DOI: 10.1016/j.medmal.2012.05.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Revised: 01/03/2012] [Accepted: 05/01/2012] [Indexed: 10/25/2022]
Abstract
INTRODUCTION Naphthoquinone derivatives are under investigation as potential therapeutic agents. The antibacterial and antifungal activity of lawsone and of some novel naphthoquinone derivatives was assessed in vitro. METHODS The antimicrobial activity was determined using diffusion disk and the broth microdilution methods against seven bacteria and three Candida species, according to recommendations of the Clinical and Laboratory Standards Institute. RESULTS Two compounds (P05 et P06) presented a good antibacterial effectiveness against two gram-positive bacteria. No antifungal potency was observed against the three Candida albicans strains used in the test. CONCLUSION Our results prove that the introduction of substituents on ketone function position 4 decreased the antimicrobial properties of the synthetized compounds.
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Ding ZG, Li MG, Zhao JY, Ren J, Huang R, Xie MJ, Cui XL, Zhu HJ, Wen ML. Naphthospironone A: An Unprecedented and Highly Functionalized Polycyclic Metabolite from an Alkaline Mine Waste Extremophile. Chemistry 2010; 16:3902-5. [DOI: 10.1002/chem.200903198] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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Burnier G, Vogel P. Synthesis and Circular Dichroism of Optically Pure (±)-(1S,2S,5S)-5-Methoxy-3,4,6,7-tetramethylidenebicyclo[3.2.1]oct-2-yl Derivatives. Baker's Yeast Reduction of 4-Methoxy-5,6,7,8-tetramethylidenebicyclo[2.2.2]octan-2-one. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19900730425] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Brünker P, McKinney K, Sterner O, Minas W, Bailey JE. Isolation and characterization of the naphthocyclinone gene cluster from Streptomyces arenae DSM 40737 and heterologous expression of the polyketide synthase genes. Gene 1999; 227:125-35. [PMID: 10206788 DOI: 10.1016/s0378-1119(98)00618-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Streptomyces arenae produces the aromatic polyketide naphthocyclinone, which exhibits activity against Gram-positive bacteria. A cosmid clone containing the putative naphthocyclinone gene cluster was isolated from a genomic library of S. arenae by hybridization with a conserved region from the actinorhodin PKS of S. coelicolor. Sequence analysis of a 5.5-kb DNA fragment, which hybridizes with the actI probe, revealed three open reading frames coding for the minimal polyketide synthase. A strong sequence similarity was found to several previously described ketosynthases, chain length factors and acyl carrier proteins from other polyketide gene clusters. An additional open reading frame downstream of the PKS genes of S. arenae showed 53% identity to act VII probably encoding an aromatase. Another open reading frame was identified in a region of 1.436 bp upstream of the PKS genes, which, however, had no similarity to known genes in the database. Approximately 8 kb upstream of the PKS genes, a DNA fragment was identified that hybridizes to an actVII--actIV specific probe coding for a cyclase and a putative regulatory protein, respectively. Disruption of the proposed naphthocyclinone gene cluster by insertion of a thiostrepton resistance gene completely abolished production of naphthocyclinones in the mutant strain, showing that indeed the naphthocyclinone gene cluster had been isolated. Heterologous expression of the minimal PKS genes in S. coelicolor CH999 in the presence of the act ketoreductase led to the production of mutactin and dehydromutactin, indicating that the S. arenae polyketide synthase forms a C-16 backbone that is subsequently dimerized to build naphthocyclinone. The functions of the proposed cyclase and aromatase were examined by coexpression with genes from different polyketide core producers.
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Affiliation(s)
- P Brünker
- Institute of Biotechnology, ETH Zürich, Switzerland
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Hallam SE, Malpartida F, Hopwood DA. Nucleotide sequence, transcription and deduced function of a gene involved in polyketide antibiotic synthesis in Streptomyces coelicolor. Gene X 1988; 74:305-20. [PMID: 2469622 DOI: 10.1016/0378-1119(88)90165-5] [Citation(s) in RCA: 149] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The BamHI fragment containing the actIII gene, from the actinorhodin (Act) biosynthetic gene cluster of Streptomyces coelicolor A3(2), was sequenced. The derived amino acid sequence for the actIII gene shows homology to known oxidoreductases and the actIII product is believed to be responsible for catalysing a beta-keto reductive step during assembly of the Act polyketide chain. High resolution transcript mapping identified the transcription start point at 33 nucleotides upstream of the putative translation start codon. The transcript ends in a large invertedly repeated sequence. In vivo promoter-probe studies suggest that efficient transcription of the actIII gene requires the product of the actII gene.
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Krone B, Zeeck A. 13C-NMR and CD Spectroscopy with Isochromanquinones – Potent Methods to Determine the Stereochemistry and the Tautomeric Equilibrium in This Group of Antibiotics. ACTA ACUST UNITED AC 1987. [DOI: 10.1002/jlac.198719870823] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Egert E, Noltemeyer M, Sheldrick GM, Saenger W, Brand H, Zeeck A. Die Struktur des γ-Naphthocyclinons. ACTA ACUST UNITED AC 1983. [DOI: 10.1002/jlac.198319830314] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Krone B, Zeeck A. Bestimmung der Verknüpfung dimerer Isochromanchinone durch Diazomethan-Abbau. ACTA ACUST UNITED AC 1983. [DOI: 10.1002/jlac.198319830315] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Malik VS. Genetics and Biochemistry of Secondary Metabolism. ADVANCES IN APPLIED MICROBIOLOGY 1982. [DOI: 10.1016/s0065-2164(08)70233-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Eckardt K, Tresselt D, Schönecker B. Antibiotika aus actinomyceten. zur stereochemie der griseorhodine. Tetrahedron 1979. [DOI: 10.1016/0040-4020(79)80025-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tsuji N, Kobayashi M, Terui Y, Tori K. The structures of griseusins A and B, new isochromanquinone antibiotics. Tetrahedron 1976. [DOI: 10.1016/0040-4020(76)85133-2] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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29
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Zeeck A, Mardin M. Stoffwechselprodukte von Mikroorganismen, 1281) Isolierung und Konstitution von α-Naphthocyclinon. ACTA ACUST UNITED AC 1974. [DOI: 10.1002/jlac.197419740706] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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