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Umakoshi Y, Takemoto Y, Tsubouchi A, Zhdankin VV, Yoshimura A, Saito A. Dehydrogenative Cycloisomerization/Arylation Sequence of
N
‐Propargyl Carboxamides with Arenes by Iodine(III)‐Catalysis. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yuki Umakoshi
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
| | - Yusuke Takemoto
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
| | - Akira Tsubouchi
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
| | - Viktor V. Zhdankin
- Department of Chemistry and Biochemistry University of Minnesota Duluth MN 55812 USA
| | - Akira Yoshimura
- Department of Chemistry and Biochemistry University of Minnesota Duluth MN 55812 USA
- Research School of Chemistry and Applied Biomedical Sciences The Tomsk Polytechnic University, postCode/>634050 Tomsk Russia
| | - Akio Saito
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
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2
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Synthesis of Indoles via Intermolecular and Intramolecular Cyclization by Using Palladium-Based Catalysts. Catalysts 2021. [DOI: 10.3390/catal11091018] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
As part of natural products or biologically active compounds, the synthesis of nitrogen-containing heterocycles is becoming incredibly valuable. Palladium is a transition metal that is widely utilized as a catalyst to facilitate carbon-carbon and carbon-heteroatom coupling; it is used in the synthesis of various heterocycles. This review includes the twelve years of successful indole synthesis using various palladium catalysts to establish carbon-carbon or carbon-nitrogen coupling, as well as the conditions that have been optimized.
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Vaz B, Martínez C, Cruz F, Denis JG, de Lera ÁR, Aurrecoechea JM, Álvarez R. Palladium-Catalyzed Aminocyclization-Coupling Cascades: Preparation of Dehydrotryptophan Derivatives and Computational Study. J Org Chem 2021; 86:8766-8785. [PMID: 34125552 PMCID: PMC8929666 DOI: 10.1021/acs.joc.1c00636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Indexed: 12/31/2022]
Abstract
Dehydrotryptophan derivatives have been prepared by palladium-catalyzed aminocyclization-Heck-type coupling cascades starting from o-alkynylaniline derivatives and methyl α-aminoacrylate. Aryl, alkyl (primary, secondary, and tertiary), and alkenyl substituents have been introduced at the indole C-2 position. Further variations at the indole benzene ring, as well as the C-2-unsubstituted case, have all been demonstrated. In the case of C-2 aryl substitution, the preparation of the o-alkynylaniline substrate by Sonogashira coupling and the subsequent cyclization-coupling cascade have been performed in a one-pot protocol with a single catalyst. DFT calculations have revealed significant differences in the reaction profiles of these reactions relative to those involving methyl acrylate or methacrylate, and between the reactions of the free anilines and their corresponding carbamates. Those calculations suggest that the nature of the alkene and of the acid HX released in the HX/alkene exchange step that precedes C-C bond formation could be responsible for the experimentally observed differences in reaction efficiencies.
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Affiliation(s)
- Belén Vaz
- Departamento
de Química Orgánica, Facultad de Química (CINBIO)
and Instituto de Investigación Biomédica de Vigo (IBIV), Universidade de Vigo, Lagoas-Marcosende, 36310 Vigo, Spain
| | - Claudio Martínez
- Departamento
de Química Orgánica, Facultad de Química (CINBIO)
and Instituto de Investigación Biomédica de Vigo (IBIV), Universidade de Vigo, Lagoas-Marcosende, 36310 Vigo, Spain
| | - Francisco Cruz
- Departamento
de Química Orgánica, Facultad de Química (CINBIO)
and Instituto de Investigación Biomédica de Vigo (IBIV), Universidade de Vigo, Lagoas-Marcosende, 36310 Vigo, Spain
| | - J. Gabriel Denis
- Departamento
de Química Orgánica, Facultad de Química (CINBIO)
and Instituto de Investigación Biomédica de Vigo (IBIV), Universidade de Vigo, Lagoas-Marcosende, 36310 Vigo, Spain
| | - Ángel R. de Lera
- Departamento
de Química Orgánica, Facultad de Química (CINBIO)
and Instituto de Investigación Biomédica de Vigo (IBIV), Universidade de Vigo, Lagoas-Marcosende, 36310 Vigo, Spain
| | - José M. Aurrecoechea
- Departamento
de Química Orgánica e Inorgánica, Facultad de
Ciencia y Tecnología, Universidad
del País Vasco UPV/EHU, Apartado 644, 48080 Bilbao, Spain
| | - Rosana Álvarez
- Departamento
de Química Orgánica, Facultad de Química (CINBIO)
and Instituto de Investigación Biomédica de Vigo (IBIV), Universidade de Vigo, Lagoas-Marcosende, 36310 Vigo, Spain
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Neto JSS, Zeni G. Recent advances in the synthesis of indoles from alkynes and nitrogen sources. Org Chem Front 2020. [DOI: 10.1039/c9qo01315f] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This review highlights ten years of success in the synthesis of indoles using alkynes and nitrogen sources as substrates.
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Affiliation(s)
- José Sebastião Santos Neto
- Laboratório de Síntese
- Reatividade
- Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE
- UFSM
- Santa Maria
| | - Gilson Zeni
- Laboratório de Síntese
- Reatividade
- Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE
- UFSM
- Santa Maria
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Okamoto N, Sueda T, Minami H, Yanada R. Inter- and Intramolecular Alkyne-Carbonyl Metathesis/1,6-Addition/Oxidative Aromatization Tandem Reactions between 1,6-Diynes and Aldehydes. Org Lett 2019; 21:8847-8851. [PMID: 31633934 DOI: 10.1021/acs.orglett.9b03494] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report an efficient synthetic route to 9-arylfluorenes and biaryl compounds from 1,6-diynes and aldehydes via inter- and intramolecular alkyne-carbonyl metathesis/1,6-addition/oxidative aromatization reactions. These tandem reactions are initiated by a BF3·Et2O-promoted tandem inter- and intramolecular alkyne-carbonyl metathesis of 1,6-diynes with carbonyl compounds followed by an In(OTf)3-catalyzed 1,6-addition/oxidative aromatization with iodobenzene diacetate.
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Affiliation(s)
- Noriko Okamoto
- Faculty of Pharmaceutical Sciences , Hiroshima International University , 5-1-1 Hirokoshingai , Kure , Hiroshima 737-0112 , Japan
| | - Takuya Sueda
- Faculty of Pharmaceutical Sciences , Hiroshima International University , 5-1-1 Hirokoshingai , Kure , Hiroshima 737-0112 , Japan
| | - Hideki Minami
- Faculty of Pharmaceutical Sciences , Hiroshima International University , 5-1-1 Hirokoshingai , Kure , Hiroshima 737-0112 , Japan
| | - Reiko Yanada
- Faculty of Pharmaceutical Sciences , Hiroshima International University , 5-1-1 Hirokoshingai , Kure , Hiroshima 737-0112 , Japan
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Abstract
Indole is the most frequently found heterocyclic core structures in pharmaceuticals, natural products, agrochemicals, dyes and fragrances. For about 150 years, chemists were absorbed in finding new and easier synthetic strategies to build this nucleus. Many books and reviews have been written, but the number of new syntheses that appear in the literature, make necessary continuous updates. This reviews aims to give a comprehensive overview on indole synthesis catalyzed by transition metals appeared in the literature in the years 2016 and 2017.
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Zhang X, Li S, Wei X, Lei Y. Computational study of Ru-catalyzed cycloisomerization of 2-alkynylanilides. J Mol Model 2018; 24:162. [PMID: 29904890 DOI: 10.1007/s00894-018-3707-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Accepted: 06/06/2018] [Indexed: 11/24/2022]
Abstract
The reaction mechanism of Ru-catalyzed cycloisomerization of 2-alkynylanilides to 3-substituted indole or 2-substituted indole was analyzed at the B3LYP level of density functional theory. The solvation effect of the system was also considered by SMD model. The calculation results show that the reaction system first forms a ruthenium π-alkyne complex. On the one hand, the cyclization reaction of the amino group and the alkyne carbon in the reaction precursor complex directly forms the 2-substituted indole product. On the other hand, the benzene ring in the reaction complex undergoes 1,2-carbon migration on the C≡C triple bond to form the vinylidene complex. After cyclization and hydrogen transfer, the catalyst is regenerated to obtain 3-substituted indole product. The latter reaction process has relatively lower activation free energy and is also the main reaction channel for this reaction, which is consistent with published experimental results. This study provides a reasonable reaction mechanism and effective experimental supplement.
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Affiliation(s)
- Xinghui Zhang
- College of Chemical Engineering, Lanzhou University of Arts and Science, Lanzhou, 730010, China.
| | - Shanshan Li
- College of Chemical Engineering, Lanzhou University of Arts and Science, Lanzhou, 730010, China
| | - Xiaoli Wei
- College of Chemical Engineering, Lanzhou University of Arts and Science, Lanzhou, 730010, China
| | - Yun Lei
- College of Chemical Engineering, Lanzhou University of Arts and Science, Lanzhou, 730010, China
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Ogunlana AA, Zou J, Bao X. Computational insights into the mechanisms of Ru-catalyzed cycloisomerization of 2-ethynylaniline and 2-(2-propynyl)tosylanilide: The role of pyridine in assisting the metal-vinylidene formation. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.03.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Minami H, Okamoto N, Sueda T, Sakaguchi T, Ishikura M, Yanada R. Reaction of 2-propargylphenylcarbamates with diphenyliodonium salts via Meyer-Schuster rearrangement. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.09.079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zeng MT, Xu W, Liu X, Chang CZ, Zhu H, Dong ZB. Copper-CatalyzedS-Arylation of Tetraalkylthiuram Disulfides by Using Diaryliodonium Salts. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701056] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Meng-Tian Zeng
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
| | - Wan Xu
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
| | - Xing Liu
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
| | - Cai-Zhu Chang
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
| | - Hui Zhu
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
| | - Zhi-Bing Dong
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
- Key Laboratory of Green Chemical Process; Ministry of Education; Wuhan Institute of Technology; 430205 Wuhan China
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Watanabe T, Mutoh Y, Saito S. Ruthenium-Catalyzed Cycloisomerization of 2-Alkynylanilides: Synthesis of 3-Substituted Indoles by 1,2-Carbon Migration. J Am Chem Soc 2017; 139:7749-7752. [PMID: 28539042 DOI: 10.1021/jacs.7b04564] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We developed ruthenium-catalyzed cycloisomerization of alkynylanilides that gave 3-substituted indoles in high yields. The reaction proceeded via the disubstituted vinylidene ruthenium complex that was formed by the 1,2-carbon migration.
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Affiliation(s)
- Takuma Watanabe
- Department of Chemistry, Faculty of Science, Tokyo University of Science , Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - Yuichiro Mutoh
- Department of Chemistry, Faculty of Science, Tokyo University of Science , Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - Shinichi Saito
- Department of Chemistry, Faculty of Science, Tokyo University of Science , Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
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