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Tsanakopoulou M, Dalezis P, Karakousi C, Schina D, Trafalis D, Malamidou‐Xenikaki E, Sarli V. Synthesis and Cytotoxic Effects of 3,6‐Bis‐indolyl 2,5‐Dihydroxybenzoquinone Acetates. ChemistrySelect 2022. [DOI: 10.1002/slct.202202060] [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)
- Maria Tsanakopoulou
- Department of Chemistry Aristotle University of Thessaloniki Thessaloniki 541 24 Greece
| | - Panagiotis Dalezis
- Laboratory of Pharmacology Medical School I National and Kapodistrian University of Athens 75 Mikras Asias Street Athens 11527 Greece
| | | | - Dionysia Schina
- Department of Chemistry Aristotle University of Thessaloniki Thessaloniki 541 24 Greece
| | - Dimitris Trafalis
- Laboratory of Pharmacology Medical School I National and Kapodistrian University of Athens 75 Mikras Asias Street Athens 11527 Greece
| | | | - Vasiliki Sarli
- Department of Chemistry Aristotle University of Thessaloniki Thessaloniki 541 24 Greece
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2
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Liu X, He K, Pan J, Zeng W, Lin J, Jin Y. Copper-catalyzed cascade reaction of indole and benzimidazole radicals to synthesize 3-haloindole-benzimidazole compounds. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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3
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Zhou Y, Li Z, Ma F, Zhao C, Lu P, Wang Y. Palladium-Catalyzed Synthesis of 3-Haloindol-2-amines from 3-Diazoindolin-2-imines and Alkyl Halides. J Org Chem 2019; 84:6655-6668. [DOI: 10.1021/acs.joc.9b00191] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yuxuan Zhou
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Zhenmin Li
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Fanghui Ma
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Chang Zhao
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Ping Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yanguang Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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Himabindu V, Parvathaneni SP, Rao VJ. PhI(OAc)2/NaX-mediated halogenation providing access to valuable synthons 3-haloindole derivatives. NEW J CHEM 2018. [DOI: 10.1039/c8nj03822h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper describes a mild phenyliodine diacetate mediated method for selective chlorination, bromination, and iodination of indole C–H bonds using sodium halide as a source for analogous halogenations.
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Affiliation(s)
- Vittam Himabindu
- Fluoro AgroChemicals Laboratory
- Organic Chemistry Division II
- CSIR-Indian Institute of Chemical Technology (IICT)
- Hyderabad-500 607
- India
| | - Sai Prathima Parvathaneni
- Fluoro AgroChemicals Laboratory
- Organic Chemistry Division II
- CSIR-Indian Institute of Chemical Technology (IICT)
- Hyderabad-500 607
- India
| | - Vaidya Jayathirtha Rao
- Fluoro AgroChemicals Laboratory
- Organic Chemistry Division II
- CSIR-Indian Institute of Chemical Technology (IICT)
- Hyderabad-500 607
- India
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Wang J, Zhu HT, Chen S, Xia Y, Jin DP, Qiu YF, Li YX, Liang YM. Electrophilic Cyclization of Aryl Propargylic Alcohols: Synthesis of Dihalogenated 6,9-Dihydropyrido[1,2-a]indoles via a Cascade Iodocyclization. J Org Chem 2016; 81:10975-10986. [DOI: 10.1021/acs.joc.6b02013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Jia Wang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Hai-Tao Zhu
- Shannxi
Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji 721013, People’s Republic of China
| | - Si Chen
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Yu Xia
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Dong-Po Jin
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Yi-Feng Qiu
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Ying-Xiu Li
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Yong-Min Liang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
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6
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Atzori M, Pop F, Cauchy T, Mercuri ML, Avarvari N. Thiophene-benzoquinones: synthesis, crystal structures and preliminary coordination chemistry of derived anilate ligands. Org Biomol Chem 2014; 12:8752-63. [DOI: 10.1039/c4ob01582g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Li X, Zheng SL, Li X, Li JL, Qiang O, Liu R, He L. Synthesis and anti-breast cancer activity of new indolylquinone derivatives. Eur J Med Chem 2012; 54:42-8. [DOI: 10.1016/j.ejmech.2012.04.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 04/10/2012] [Accepted: 04/12/2012] [Indexed: 12/24/2022]
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8
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Zhou F, Cao ZY, Zhang J, Yang HB, Zhou J. A Highly Efficient Friedel-Crafts Reaction of 3-Hydroxyoxindoles and Aromatic Compounds to 3,3-Diaryl and 3-Alkyl-3-aryloxindoles Catalyzed by Hg(ClO4)2⋅3 H2O. Chem Asian J 2011; 7:233-41. [DOI: 10.1002/asia.201100773] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Indexed: 12/26/2022]
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9
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Viault G, Grée D, Das S, Yadav JS, Grée R. Synthesis of a Focused Chemical Library Based on Derivatives of Embelin, a Natural Product with Proapoptotic and Anticancer Properties. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001627] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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10
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Abstract
Important biologically active indole alkaloids are decorated with prenyl (3,3-dimethylallyl) and tert-prenyl (1,1-dimethylallyl) groups. Covering the literature until the end of 2010, this review article comprehensively summarises and discusses the currently available technologies of prenylation and tert-prenylation of indoles, which have been applied in natural products total syntheses or could be applied there in the near future. We focus on those procedures which introduce the C(5) units in one step, organised according to the indole position to be functionalised. Key strategies include electrophilic and nucleophilic prenylation and tert-prenylation, prenyl and tert-prenyl rearrangements, transition metal-mediated reactions and enzymatic methods.
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Affiliation(s)
- Thomas Lindel
- Institut für Organische Chemie, TU Braunschweig, Hagenring 30, 38106 Braunschweig, Germany.
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11
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12
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Bräse S, Encinas A, Keck J, Nising CF. Chemistry and Biology of Mycotoxins and Related Fungal Metabolites. Chem Rev 2009; 109:3903-90. [DOI: 10.1021/cr050001f] [Citation(s) in RCA: 411] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Stefan Bräse
- Institut für Organische Chemie,Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
| | - Arantxa Encinas
- Institut für Organische Chemie,Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
| | - Julia Keck
- Institut für Organische Chemie,Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
| | - Carl F. Nising
- Institut für Organische Chemie,Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
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13
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Gan X, Jiang W, Wang W, Hu L. An Approach to 3,6-Disubstituted 2,5-Dioxybenzoquinones via Two Sequential Suzuki Couplings. Three-Step Synthesis of Leucomelone. Org Lett 2009; 11:589-92. [DOI: 10.1021/ol802645f] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xianwen Gan
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 199 Guoshoujing Road, Shanghai 201203, People’s Republic of China, Department of Chemistry & Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131-0001, and School of Pharmacy, East China University of Science & Technology, 130 Mei-Long Road, Shanghai 200237, People’s Republic of China
| | - Wei Jiang
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 199 Guoshoujing Road, Shanghai 201203, People’s Republic of China, Department of Chemistry & Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131-0001, and School of Pharmacy, East China University of Science & Technology, 130 Mei-Long Road, Shanghai 200237, People’s Republic of China
| | - Wei Wang
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 199 Guoshoujing Road, Shanghai 201203, People’s Republic of China, Department of Chemistry & Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131-0001, and School of Pharmacy, East China University of Science & Technology, 130 Mei-Long Road, Shanghai 200237, People’s Republic of China
| | - Lihong Hu
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 199 Guoshoujing Road, Shanghai 201203, People’s Republic of China, Department of Chemistry & Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131-0001, and School of Pharmacy, East China University of Science & Technology, 130 Mei-Long Road, Shanghai 200237, People’s Republic of China
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14
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Peña-López M, Martínez M, Sarandeses L, Pérez Sestelo J. Total Synthesis of (+)-Neomarinone. Chemistry 2008; 15:910-6. [DOI: 10.1002/chem.200802021] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Tanoue Y, Motoi T, Masuda Y, Kai N, Sakata K, Hashimoto M, Nagai T. A facile synthesis of asterriquinone D. J Heterocycl Chem 2008. [DOI: 10.1002/jhet.5570450544] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Mathur P, Avasare VD, Mobin SM. Iron pentacarbonyl assisted photochemical route to 2,5- and 2,6-divinyl-substituted 1,4-benzoquinones from 1-ene-3-ynes. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.06.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Pirrung MC, Deng L, Lin B, Webster NJG. Quinone Replacements for Small Molecule Insulin Mimics. Chembiochem 2008; 9:360-2. [DOI: 10.1002/cbic.200700597] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Lin B, Li Z, Park K, Deng L, Pai A, Zhong L, Pirrung MC, Webster NJG. Identification of novel orally available small molecule insulin mimetics. J Pharmacol Exp Ther 2007; 323:579-85. [PMID: 17687071 DOI: 10.1124/jpet.107.126102] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Oral hypoglycemic agents have great potential for the treatment of both type 1 and type 2 diabetes. Here we report the identification of novel, small-molecule, insulin mimetics that activate the insulin receptor (IR) in vivo and in vitro, stimulate the Akt and extracellular signal-regulated kinase pathways downstream of the IR, and mimic the ability of insulin to stimulate glucose uptake, glycogen synthesis, and lipid synthesis in 3T3-L1 adipocytes. However, the compounds do not mimic the mitogenic effect of insulin. In animals, these compounds have oral hypoglycemic effects in both normal C57BL6 mice and diabetic db/db mice. Quantitative structure activity relationship modeling on data from a library of 60 compounds has highlighted structural features that are important for IR agonist activity that can be used to guide design of second and third generation compounds with greater potency and specificity.
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Affiliation(s)
- Bo Lin
- Veterans Affairs San Diego Healthcare System and Veterans Medical Research Foundation, San Diego, California, USA
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Pirrung MC, Li Z, Hensley E, Liu Y, Tanksale A, Lin B, Pai A, Webster NJG. Parallel synthesis of indolylquinones and their cell-based insulin mimicry. ACTA ACUST UNITED AC 2007; 9:844-54. [PMID: 17595147 DOI: 10.1021/cc070062m] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A synthetic route to bis-indolyldihydroxybenzoquinones was adapted for parallel organic synthesis. The route involves selective conjugate addition of an indole to dichlorobenzoquinone promoted by Brønsted acid, followed by a Lewis acid-promoted conjugate addition of a second indole and a final hydrolysis. Methods for high-throughput purification of the products of this synthesis were also developed. Using these methods, we prepared a library whose structures are based on asterriquinone natural products, which have a wide range of biological activities. In this report, the activities of the library members in activation of the insulin receptor on mammalian cells were examined. Novel compounds were discovered that fall outside earlier developed structure-activity relationships for insulin mimics, supporting the value of systematic investigation (inspired by Nature) for the discovery of novel biologically active molecules.
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Affiliation(s)
- Michael C Pirrung
- Department of Chemistry, University of California, Riverside, California 92521-0403, USA.
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Abstract
7-Prenylindole is a useful building block for natural product and natural product analogue synthesis. While there have been several past syntheses of 7-prenylindole, none of them is very practical for its preparation on scale. Using an aza-Claisen rearrangement as the key step, 7-prenylindole has been prepared in four steps from indoline in 62% overall yield.
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Schneider P, Weber M, Rosenberger K, Hoffmeister D. A One-Pot Chemoenzymatic Synthesis for the Universal Precursor of Antidiabetes and Antiviral Bis-Indolylquinones. ACTA ACUST UNITED AC 2007; 14:635-44. [PMID: 17584611 DOI: 10.1016/j.chembiol.2007.05.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2007] [Revised: 04/03/2007] [Accepted: 05/08/2007] [Indexed: 11/22/2022]
Abstract
Bis-indolylquinones represent a class of fungal natural products that display antiretroviral, antidiabetes, or cytotoxic bioactivities. Recent advances in Aspergillus genomic mining efforts have led to the discovery of the tdiA-E-gene cluster, which is the first genetic locus dedicated to bis-indolylquinone biosynthesis. We have now genetically and biochemically characterized the enzymes TdiA (bis-indolylquinone synthetase) and TdiD (L-tryptophan:phenylpyruvate aminotransferase), which, together, confer biosynthetic abilities for didemethylasterriquinone D to Aspergillus nidulans. This compound is the universal intermediate for all bis-indolylquinones. In this biochemical study of a bis-indolylquinone synthetase and a fungal natural product transaminase, we present a one-pot chemoenzymatic protocol to generate didemethylasterriquinone D in vitro. As TdiA resembles a nonribosomal peptide synthetase, yet catalyzes carbon-carbon-bond formation, we discuss the implications for peptide synthetase chemistry.
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Affiliation(s)
- Patrick Schneider
- Pharmaceutical Biology and Biotechnology, Albert-Ludwigs-Universität, Stefan-Meier-Strasse 19, 79104 Freiburg, Germany
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Fletcher AJ, Bax MN, Willis MC. Palladium-catalysed N-annulation routes to indoles: the synthesis of indoles with sterically demanding N-substituents, including demethylasterriquinone A1. Chem Commun (Camb) 2007:4764-6. [DOI: 10.1039/b712227f] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Koulouri S, Malamidou-Xenikaki E, Spyroudis S. Acid-catalyzed addition of indoles to hydroxyquinones. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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24
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Methods for the Synthesis of Heteroaryl-substituted 1,4-Benzo- and 1,4-Naphthoquinones. (Review). Chem Heterocycl Compd (N Y) 2005. [DOI: 10.1007/s10593-005-0210-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Pirrung MC, Fujita K, Park K. Organometallic routes to 2,5-dihydroxy-3-(indol-3-yl)benzoquinones. Synthesis of demethylasterriquinone B4. J Org Chem 2005; 70:2537-42. [PMID: 15787540 DOI: 10.1021/jo048126s] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A method has been developed to sequentially add indole-3-mercurials to dichlorinated quinones using palladium catalysis. These reactions can be used in the modular assembly of bis(indol-3-yl)benzoquinones, a significant natural product family.
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Affiliation(s)
- Michael C Pirrung
- Department of Chemistry, Levine Science Research Center, Duke University, Durham, North Carolina 27708-0317, USA.
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Chinchilla R, Nájera C, Yus M. Metalated Heterocycles and Their Applications in Synthetic Organic Chemistry. Chem Rev 2004; 104:2667-722. [PMID: 15137804 DOI: 10.1021/cr020101a] [Citation(s) in RCA: 272] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rafael Chinchilla
- Departamento de Química Orgánica and Instituto de Síntesis Orgánica, Facultad de Ciencias, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain.
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Nájera C, Sansano JM, Yus M. Recent synthetic uses of functionalised aromatic and heteroaromatic organolithium reagents prepared by non-deprotonating methods. Tetrahedron 2003. [DOI: 10.1016/j.tet.2003.09.065] [Citation(s) in RCA: 131] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Webster NJG, Park K, Pirrung MC. Signaling effects of demethylasterriquinone B1, a selective insulin receptor modulator. Chembiochem 2003; 4:379-85. [PMID: 12740809 DOI: 10.1002/cbic.200200468] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A possible breakthrough in the treatment of diabetes was made with the discovery that a fungal natural product, demethylasterriquinone B1 (DAQ B1), is an orally active, small-molecule mimic of insulin. Subsequent work has shown that the glucose-lowering effects of DAQ B1 are not accompanied by enhanced vascular proliferation, which is a side effect of chronic insulin administration that can lead to arteriosclerosis. Our recent short and modular total synthesis of DAQ B1 could be readily modified to create congeners and afforded ample supplies of the natural product, which permitted intracellular signal transduction of DAQ B1 to be examined. The activities of DAQ B1 and over a dozen related structures were studied for insulin receptor (IR) and insulin receptor substrate-1 phosphorylation. Examination of the effect of DAQ B1 on kinases downstream of the IR in insulin signal transduction showed selective activation of Akt kinase (a metabolic effect) but not of extracellular-regulated kinase (a proliferative effect). The influence of DAQ B1 on gene expression (determined by a microarray study) was also divergent from that of insulin, which activates both proliferative and metabolic pathways. The action of DAQ B1 as a selective insulin receptor modulator can be accounted for by its ability to selectively activate one kinase among the many emanating from insulin receptor autophosphorylation and its reduced effects on gene expression.
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Affiliation(s)
- Nicholas J G Webster
- Department of Medicine 0673 University of California-San Diego, 9500 Gilman Drive La Jolla, California 92093, USA.
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Chapter 5.2 Five-membered ring systems: Pyrroles and benzo derivatives. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0959-6380(03)80009-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2023]
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