1
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Miki K, Maeda K, Matsubara R, Hayashi M. Synthesis of 2-(Pyridin-2-yl)phenols and 2-(Pyridin-2-yl)anilines. J Org Chem 2024; 89:5797-5810. [PMID: 38563078 DOI: 10.1021/acs.joc.4c00423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Herein, we report a new synthetic strategy for 2-(pyridin-2-yl)phenols and 2-(pyridin-2-yl)anilines catalyzed by a Pd/C-ethylene system. The starting materials, 2-(pyridin-2-yl)cyclohexan-1-ones, can be easily prepared by the reaction of substituted pyridine N-oxide and cyclohexanones. The most useful feature of this method is that both 2-(pyridin-2-yl)phenols and 2-(pyridin-2-yl)anilines are easily synthesized independently using the same compound as a starting material, simply by adding or not adding a nitrogen source.
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Affiliation(s)
- Keigo Miki
- Department of Chemistry, Graduate School of Science, Kobe University, Nada, Kobe 657-8501, Japan
| | - Katsumi Maeda
- Department of Chemistry, Graduate School of Science, Kobe University, Nada, Kobe 657-8501, Japan
| | - Ryosuke Matsubara
- Department of Chemistry, Graduate School of Science, Kobe University, Nada, Kobe 657-8501, Japan
| | - Masahiko Hayashi
- Department of Chemistry, Graduate School of Science, Kobe University, Nada, Kobe 657-8501, Japan
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2
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Yang M, Lenarda A, Frindy S, Sang Y, Oksanen V, Bolognani A, Hendrickx L, Helaja J, Li Y. A metal-free carbon catalyst for oxidative dehydrogenation of aryl cyclohexenes to produce biaryl compounds. Proc Natl Acad Sci U S A 2023; 120:e2303564120. [PMID: 37487083 PMCID: PMC10401020 DOI: 10.1073/pnas.2303564120] [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: 03/08/2023] [Accepted: 05/30/2023] [Indexed: 07/26/2023] Open
Abstract
A metal-free route based on a carbon catalyst to synthesize biphenyls through oxidative dehydrogenation (ODH) of phenyl cyclohexene has been investigated. Among the samples examined, an air-oxidized active carbon exhibits the best activity with a 9.1 × 10-2 h-1 rate constant, yielding 74% biphenyl in 28 h at 140 °C under five bar O2 in anisole. The apparent activation energy is measured as 54.5 kJ⋅mol-1. The extended reaction scope, consisting of 15 differently substituted phenyl cyclohexenes, shows the wide applicability of the proposed method. The catalyst's good recyclability over six runs suggests this ODH method as a promising route to access the biaryl compounds. In addition, the reaction mechanism is investigated with a combination of X-ray photoelectron spectroscopy, functional group blocking, and model compounds of carbon catalysts and is proposed to be based on the redox cycle of the quinoidic groups on the carbon surface. Additional experiments prove that the addition of the catalytic amount of acid (methanesulfonic acid) accelerates the reaction. In addition, Hammett plot examination suggests the formation of a carbonium intermediate, and its possible structure is outlined.
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Affiliation(s)
- Mingze Yang
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Espoo02150, Finland
| | - Anna Lenarda
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Sana Frindy
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Yushuai Sang
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Espoo02150, Finland
| | - Valtteri Oksanen
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Adriano Bolognani
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Lisa Hendrickx
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Juho Helaja
- Department of Chemistry, University of Helsinki, Helsinki00014, Finland
| | - Yongdan Li
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Espoo02150, Finland
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3
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Sun G, Wang Z, Deng Z, Luo Z, Zhang J. Development of novel C2-symmetrical [5]oxahelicenoid diols. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Abdulkarim A, Nathusius M, Bäuerle R, Strunk KP, Beck S, Räder HJ, Pucci A, Melzer C, Jänsch D, Freudenberg J, Bunz UHF, Müllen K. Beyond p-Hexaphenylenes: Synthesis of Unsubstituted p-Nonaphenylene by a Precursor Protocol. Chemistry 2021; 27:281-288. [PMID: 32786130 PMCID: PMC7839583 DOI: 10.1002/chem.202001531] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 08/11/2020] [Indexed: 11/12/2022]
Abstract
The synthesis of unsubstituted oligo‐para‐phenylenes (OPP) exceeding para‐hexaphenylene—in the literature often referred to as p‐sexiphenyl—has long remained elusive due to their insolubility. We report the first preparation of unsubstituted para‐nonaphenylenes (9PPs) by extending our precursor route to poly‐para‐phenylenes (PPP) to a discrete oligomer. Two geometric isomers of methoxylated syn‐ and anti‐cyclohexadienylenes were synthesized, from which 9PP was obtained via thermal aromatization in thin films. 9PP was characterized via optical, infrared and solid‐state 13C NMR spectroscopy as well as atomic force microscopy and mass spectrometry, and compared to polymeric analogues. Due to the lack of substitution, para‐nonaphenylene, irrespective of the precursor isomer employed, displays pronounced aggregation in the solid state. Intermolecular excitonic coupling leads to formation of H‐type aggregates, red‐shifting emission of the films to greenish. 9PP allows to study the structure–property relationship of para‐phenylene oligomers and polymers, especially since the optical properties of PPP depend on the molecular shape of the precursor.
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Affiliation(s)
- Ali Abdulkarim
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany
| | - Marvin Nathusius
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Rainer Bäuerle
- InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany
| | - Karl-Philipp Strunk
- Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany.,Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Sebastian Beck
- InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany
| | - Hans Joachim Räder
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Annemarie Pucci
- InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany.,Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Christian Melzer
- InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany.,Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Daniel Jänsch
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany
| | - Jan Freudenberg
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany
| | - Uwe H F Bunz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,InnovationLab, Speyerer Str. 4, 69115, Heidelberg, Germany.,Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany
| | - Klaus Müllen
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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5
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Synthesis of a triethylene glycol-capped benzo[1,2-c:4,5-c']bis[2]benzopyran-5,12-dione: A highly soluble dilactone-bridged p-terphenyl with a crankshaft architecture. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Galisteo Pretel A, Pérez del Pulgar H, Olmeda AS, Gonzalez-Coloma A, Barrero AF, Quílez del Moral JF. Novel Insect Antifeedant and Ixodicidal Nootkatone Derivatives. Biomolecules 2019; 9:biom9110742. [PMID: 31744055 PMCID: PMC6921050 DOI: 10.3390/biom9110742] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/06/2019] [Accepted: 11/12/2019] [Indexed: 11/21/2022] Open
Abstract
Naturally occurring nootkatone, with reported insecticidal and acaricidal properties, has been used as a lead to generate molecular diversity and, consequently, new insect antifeedant and ixodicidal compounds. A total of 22 derivatives were generated by subjecting this molecule to several reactions including dehydrogenation with the iodine/DMSO system, oxidation with SeO2, epoxidation with mCPBA, oxidation or carbon homologations of the α-carbonyl position with TMSOTf (trimethylsilyl trifluoromethanesulfonate) followed by Rubottom and Dess Martin periodane oxidations, condensation with formaldehyde using Yb(OTf)3 as catalyst and dehydroxilation using the Grieco protocol. The insect antifeedant (against Myzus persicae and Ropaloshysum padi) and ixodicidal (against the tick Hyalomma lusitanicum) activities of these compounds were tested. Compound 20 was the most active substance against M. persicae and R. padi, and twice more efficient than nootkatone in the antitick test.
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Affiliation(s)
- Alberto Galisteo Pretel
- Department of Organic Chemistry, Institute of Biotechnology, University of Granada, 18071 Granada, Spain; (A.G.P.); (H.P.d.P.)
| | - Helena Pérez del Pulgar
- Department of Organic Chemistry, Institute of Biotechnology, University of Granada, 18071 Granada, Spain; (A.G.P.); (H.P.d.P.)
| | - A. Sonia Olmeda
- Faculty of Veterinary, Complutense University of Madrid (UCM), 28040 Madrid, Spain;
| | | | - Alejandro F. Barrero
- Department of Organic Chemistry, Institute of Biotechnology, University of Granada, 18071 Granada, Spain; (A.G.P.); (H.P.d.P.)
- Correspondence: (A.F.B.); (J.F.Q.d.M.); Tel.: +34-958243185 (A.F.B. & J.F.Q.d.M.)
| | - José Francisco Quílez del Moral
- Department of Organic Chemistry, Institute of Biotechnology, University of Granada, 18071 Granada, Spain; (A.G.P.); (H.P.d.P.)
- Correspondence: (A.F.B.); (J.F.Q.d.M.); Tel.: +34-958243185 (A.F.B. & J.F.Q.d.M.)
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7
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Salihila J, Silva L, Pérez Del Pulgar H, Quílez Molina A, González-Coloma A, Olmeda AS, Quílez Del Moral JF, Barrero AF. One-Step Synthesis of Furan Rings from α-Isopropylidene Ketones Mediated by Iodine/DMSO: An Approach to Potent Bioactive Terpenes. J Org Chem 2019; 84:6886-6894. [PMID: 31083906 DOI: 10.1021/acs.joc.9b00704] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The system I2/dimethyl sulfoxide mediates the one-step transformation of α-isopropylidene ketones into furan rings following a biomimetic approach. This methodology has been used for the synthesis of terpene furans such as mintfurane, curzerene, atractylon, and isoatractylon, all of them possessing interesting biological activities. The synthesis of linderazulene directly from 4,5-epoxygermacrone via a cascade reaction shows the potential of this protocol. Additionally, this compound proved to show significant ixodicidal activity.
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Affiliation(s)
- Jonida Salihila
- Department of Organic Chemistry, Institute of Biotechnology , University of Granada , 18071 Granada , Spain
| | - Lúcia Silva
- FibEnTech-Materiais Fibrosos e Tecnologias Ambientais, Department of Chemistry , University of Beira Interior , 6200 Covilhã , Portugal
| | - Helena Pérez Del Pulgar
- Department of Organic Chemistry, Institute of Biotechnology , University of Granada , 18071 Granada , Spain
| | - Ana Quílez Molina
- Department of Organic Chemistry, Institute of Biotechnology , University of Granada , 18071 Granada , Spain
| | | | - A Sonia Olmeda
- Department of Animal Health, Faculty of Veterinary Medicine , Complutense University of Madrid , 28040 Madrid , Spain
| | - José F Quílez Del Moral
- Department of Organic Chemistry, Institute of Biotechnology , University of Granada , 18071 Granada , Spain
| | - Alejandro F Barrero
- Department of Organic Chemistry, Institute of Biotechnology , University of Granada , 18071 Granada , Spain
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8
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Xie ZP, Zeng M, Shi W, Cui DM, Zhang C. Cs2CO3-promoted synthesis of p-terphenyls from allyl ketones. JOURNAL OF SAUDI CHEMICAL SOCIETY 2019. [DOI: 10.1016/j.jscs.2018.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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9
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Fan W, Yang Z, Jiang B, Li G. I 2-Catalyzed sulfenylation of indoles and pyrroles using triethylammonium thiolates as sulfenylating agents. Org Chem Front 2017; 4:1091-1102. [PMID: 28983405 DOI: 10.1039/c6qo00851h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Readily available triethylammonium thiolates were proven to be new and eco-friendly sulfenylating agents for the efficient and practical construction of sulfenylated indoles and pyrroles (48 examples) with good to excellent yields under metal-free and microwave irradiation conditions. The combination of I2 and DMSO enabled direct C-S bond formation, allowing easy and low-cost access to new functionalized C,S-tethered bisindoles and pyrrole-indole pairs with a wide diversity of substituents. The mechanism involving S-S and S-I bond-forming/breaking events was proposed.
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Affiliation(s)
- Wei Fan
- Institute of Chemistry & BioMedical Sciences, Nanjing University, Nanjing 210093, P. R. China
| | - Zhen Yang
- Institute of Chemistry & BioMedical Sciences, Nanjing University, Nanjing 210093, P. R. China
| | - Bo Jiang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA.,School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Guigen Li
- Institute of Chemistry & BioMedical Sciences, Nanjing University, Nanjing 210093, P. R. China.,Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA
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10
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Singh D, Kumar V, Devi N, Malakar CC, Shankar R, Singh V. Metal-free Decarboxylative Amination: An Alternative Approach Towards Regioselective Synthesis of β-CarbolineN-fused Imidazoles. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201600970] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Dharmender Singh
- Department of Chemistry; National Institute of Technology (NIT); Jalandhar 144011 Punjab India
| | - Vipin Kumar
- Department of Chemistry; National Institute of Technology (NIT); Jalandhar 144011 Punjab India
| | - Nisha Devi
- Department of Chemistry; National Institute of Technology (NIT); Jalandhar 144011 Punjab India
| | - Chandi C. Malakar
- Department of Chemistry; National Institute of Technology (NIT) Manipur; Imphal 795004 Manipur India
| | - Ravi Shankar
- Bio-Organic Chemistry Division; CSIR - Indian Institute of Integrative Medicine (IIIM); Jammu 180001 India
| | - Virender Singh
- Department of Chemistry; National Institute of Technology (NIT); Jalandhar 144011 Punjab India
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11
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Wang SK, Chen MT, Zhao DY, You X, Luo QL. Iodine-Catalyzed Oxidative Aromatization: A Metal-Free Concise Approach to meta
-Substituted Phenols from Cyclohex-2-enones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600930] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Shi-Ke Wang
- Key Laboratory of Applied Chemistry of Chongqing Municipality, College of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 People's Republic of China
| | - Ming-Tao Chen
- Key Laboratory of Applied Chemistry of Chongqing Municipality, College of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 People's Republic of China
| | - Da-Yuan Zhao
- Key Laboratory of Applied Chemistry of Chongqing Municipality, College of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 People's Republic of China
| | - Xia You
- Key Laboratory of Applied Chemistry of Chongqing Municipality, College of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 People's Republic of China
| | - Qun-Li Luo
- Key Laboratory of Applied Chemistry of Chongqing Municipality, College of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 People's Republic of China
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12
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Crespi S, Protti S, Fagnoni M. Wavelength Selective Generation of Aryl Radicals and Aryl Cations for Metal-Free Photoarylations. J Org Chem 2016; 81:9612-9619. [DOI: 10.1021/acs.joc.6b01619] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefano Crespi
- Department of Chemistry, PhotoGreen Lab, Viale Taramelli 12, 27100 Pavia, Italy
| | - Stefano Protti
- Department of Chemistry, PhotoGreen Lab, Viale Taramelli 12, 27100 Pavia, Italy
| | - Maurizio Fagnoni
- Department of Chemistry, PhotoGreen Lab, Viale Taramelli 12, 27100 Pavia, Italy
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13
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Domingo V, Prieto C, Silva L, Rodilla JML, Quílez del Moral JF, Barrero AF. Iodine, a Mild Reagent for the Aromatization of Terpenoids. JOURNAL OF NATURAL PRODUCTS 2016; 79:831-837. [PMID: 26913544 DOI: 10.1021/acs.jnatprod.5b00914] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Efficient procedures based on the use of iodine for the aromatization of a series of terpenoids possessing diene and homoallylic or allylic alcohol functionalities are described. Different examples are reported as a proof-of-concept study. Furthermore, iodine also proved to mediate the dehydrogenation of testosterone.
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Affiliation(s)
- Victoriano Domingo
- Department of Organic Chemistry, Institute of Biotechnology, University of Granada , Avenida Fuentenueva, 18071 Granada, Spain
| | - Consuelo Prieto
- Department of Organic Chemistry, Institute of Biotechnology, University of Granada , Avenida Fuentenueva, 18071 Granada, Spain
| | - Lucia Silva
- FibEnTech-Materiais Fibrosos e Tecnologias Ambientais, Department of Chemistry, University of Beira Interior , Rua Marquês d'Ávila e Bolama, 6200 Covilhã, Portugal
| | - Jesús M L Rodilla
- FibEnTech-Materiais Fibrosos e Tecnologias Ambientais, Department of Chemistry, University of Beira Interior , Rua Marquês d'Ávila e Bolama, 6200 Covilhã, Portugal
| | - José F Quílez del Moral
- Department of Organic Chemistry, Institute of Biotechnology, University of Granada , Avenida Fuentenueva, 18071 Granada, Spain
| | - Alejandro F Barrero
- Department of Organic Chemistry, Institute of Biotechnology, University of Granada , Avenida Fuentenueva, 18071 Granada, Spain
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