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Suzuki H, Ito Y, Yabe K, Takemura Y, Matsuda T. Rhodium-catalysed additive-free alkoxycarbonylation of indoles: 2,4,6-trimethylbenzoic acid-based carbonate anhydrides as a versatile alkoxycarboxyl source. Org Biomol Chem 2024; 22:3209-3214. [PMID: 38563730 DOI: 10.1039/d4ob00205a] [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
We report a CO-free approach to indole-2-carboxylic esters: rhodium-catalysed C(2)-alkoxycarbonylation of indoles with 2,4,6-trimethylbenzoic acid-based carbonate anhydrides. Selective C-O bond cleavage of the anhydrides facilitates the introduction of various alkoxycarbonyl groups. Control experiments suggest that merging a rhodium catalyst and KI promotes the in situ formation of the RhI species.
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Affiliation(s)
- Hirotsugu Suzuki
- Tenure-Track Program for Innovative Research, University of Fukui, 3-9-1 Bunkyo, Fukui-shi, Fukui 910-8507, Japan.
| | - Yuki Ito
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Kentaro Yabe
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Yosuke Takemura
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Takanori Matsuda
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
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2
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Yadav P, Bhalla A. Recent Advances in Green Synthesis of Functionalized Quinolines of Medicinal Impact (2018‐Present). ChemistrySelect 2022. [DOI: 10.1002/slct.202201721] [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)
- Pooja Yadav
- Department of Chemistry and Centre of Advanced Studies in Chemistry Panjab University Chandigarh 160014 India
| | - Aman Bhalla
- Department of Chemistry and Centre of Advanced Studies in Chemistry Panjab University Chandigarh 160014 India
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Kilic‐Kurt Z, Acar C, Ergul M, Bakar‐Ates F, Altuntas TG. Novel indole hydrazide derivatives: Synthesis and their antiproliferative activities through inducing apoptosis and DNA damage. Arch Pharm (Weinheim) 2020; 353:e2000059. [DOI: 10.1002/ardp.202000059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/23/2020] [Accepted: 04/25/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Zühal Kilic‐Kurt
- Department of Pharmaceutical Chemistry, Faculty of PharmacyAnkara University Ankara Turkey
| | - Cemre Acar
- Department of Pharmaceutical Chemistry, Faculty of PharmacyAnkara University Ankara Turkey
| | - Mustafa Ergul
- Department of Biochemistry, Faculty of PharmacySivas Cumhuriyet University Sivas Turkey
| | - Filiz Bakar‐Ates
- Department of Biochemistry, Faculty of PharmacyAnkara University Ankara Turkey
| | - Tunca G. Altuntas
- Department of Pharmaceutical Chemistry, Faculty of PharmacyAnkara University Ankara Turkey
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4
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Ren L, Nan G, Wang Y, Xiao Z. Carboxylic Acid-Promoted Single-Step Indole Construction from Simple Anilines and Ketones via Aerobic Cross-Dehydrogenative Coupling. J Org Chem 2018; 83:14472-14488. [PMID: 30378428 DOI: 10.1021/acs.joc.8b02180] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The cross-dehydrogenative coupling (CDC) reaction is an efficient strategy for indole synthesis. However, most CDC methods require special substrates, and the presence of inherent groups limits the versatility for further transformation. A carboxylic acid-promoted aerobic catalytic system is developed herein for a single-step synthesis of indoles from simple anilines and ketones. This versatile system is featured by the broad substrate scope and the use of ambient oxygen as an oxidant and is convenient and economical for both laboratory and industry applications. The existence of the labile hydrogen at C-3 and the highly transformable carbonyl at C-2 makes the indoles versatile building blocks for organic synthesis in different contexts. Computational studies based on the density functional theory (DFT) suggest that the rate-determining step is carboxylic acid-assisted condensation of the substrates, rather than the functionalization of aryl C-H. Accordingly, a pathway via imine intermediates is deemed to be the preferred mechanism. In contrast to the general deduction, the in situ formed imine, instead of its enamine isomer, is believed to be involved in the first ligand exchange and later carbopalladation of the α-Me, which shed new light on this indolization mechanism.
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Affiliation(s)
- Long Ren
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Institute of Materia Medica , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
| | - Guanglei Nan
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Institute of Materia Medica , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
| | - Yongcheng Wang
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Institute of Materia Medica , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
| | - Zhiyan Xiao
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Institute of Materia Medica , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
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5
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A new and efficient method for the synthesis of 3-(2-nitrophenyl)pyruvic acid derivatives and indoles based on the Reissert reaction. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.09.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Panday AK, Mishra R, Jana A, Parvin T, Choudhury LH. Synthesis of Pyrimidine Fused Quinolines by Ligand-Free Copper-Catalyzed Domino Reactions. J Org Chem 2018; 83:3624-3632. [PMID: 29570285 DOI: 10.1021/acs.joc.7b03272] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Herein, we report two novel methods for the synthesis of pyrimidine fused quinolines using a one-pot C-C and C-N bond forming strategy from the reaction of 6-aminouracils with 2-bromobenzaldehydes or 2-bromobenzyl bromide derivatives in the presence of 10 mol % CuCl2 without using any ligand. The reaction of 2-bromobenzaldehyde or its derivatives with 6-aminouracils in the presence of K2CO3 as base and a catalytic amount of CuCl2 in DMF medium under microwave heating conditions provides corresponding pyrimidine fused quinoline derivatives in good yields within 30 min. Alternatively, pyrimidine fused quinoline derivatives have been synthesized from the reaction of 2-bromobenzyl bromides with 6-aminouracil derivatives in the presence of molecular oxygen, CuCl2 (10 mol %), and K2CO3 as base in DMF under reflux conditions. Structures of all the products were unambiguously confirmed by spectroscopic techniques and by recording single crystal XRD of 3a.
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Affiliation(s)
- Anoop Kumar Panday
- Department of Chemistry , Indian Institute of Technology Patna , Patna - 801103 , Bihar , India
| | - Richa Mishra
- Department of Chemistry , Indian Institute of Technology Patna , Patna - 801103 , Bihar , India
| | - Asim Jana
- Department of Chemistry , Indian Institute of Technology Patna , Patna - 801103 , Bihar , India
| | - Tasneem Parvin
- Department of Chemistry , National Institute of Technology Patna , Ashok Rajpath , Patna - 800005 , Bihar , India
| | - Lokman H Choudhury
- Department of Chemistry , Indian Institute of Technology Patna , Patna - 801103 , Bihar , India
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7
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Lang W, Yang Q, Song X, Yin M, Zhou L. Cu nanoparticles immobilized on montmorillonite by biquaternary ammonium salts: a highly active and stable heterogeneous catalyst for cascade sequence to indole-2-carboxylic esters. RSC Adv 2017. [DOI: 10.1039/c6ra25861a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Cu-Q-MMT catalyst was prepared by immobilizing Cu nanoparticals on the biquaternary ammonium salts modified montmorillonite and exhibited high activity for cascade sequence to indole-2-carboxylic esters.
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Affiliation(s)
- Wencheng Lang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province
- China West Normal University
- Nanchong 637002
- China
| | - Qin Yang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province
- China West Normal University
- Nanchong 637002
- China
| | - Xueping Song
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province
- China West Normal University
- Nanchong 637002
- China
| | - Mengyun Yin
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province
- China West Normal University
- Nanchong 637002
- China
| | - Limei Zhou
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province
- China West Normal University
- Nanchong 637002
- China
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Clagg K, Hou H, Weinstein AB, Russell D, Stahl SS, Koenig SG. Synthesis of Indole-2-carboxylate Derivatives via Palladium-Catalyzed Aerobic Amination of Aryl C-H Bonds. Org Lett 2016; 18:3586-9. [PMID: 27404018 PMCID: PMC5296645 DOI: 10.1021/acs.orglett.6b01592] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A direct oxidative C-H amination affording 1-acetyl indolecarboxylates starting from 2-acetamido-3-arylacrylates has been achieved. Indole-2-carboxylates can be targeted with a straightforward deacetylation of the initial reaction products. The C-H amination reaction is carried out using a catalytic Pd(II) source with oxygen as the terminal oxidant. The scope and application of this chemistry is demonstrated with good to high yields for numerous electron-rich and electron-poor substrates. Further reaction of selected products via Suzuki arylation and deacetylation provides access to highly functionalized indole structures.
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Affiliation(s)
- Kyle Clagg
- Small Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, CA, 94080
| | - Haiyun Hou
- Small Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, CA, 94080
| | - Adam B. Weinstein
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706
| | - David Russell
- Small Molecule Analytical Chemistry and Quality Control, Genentech, Inc., 1 DNA Way, South San Francisco, CA, 94080
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706
| | - Stefan G. Koenig
- Small Molecule Process Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, CA, 94080
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Zhou Y, Zhang C, Yuan J, Yang Q, Xiao Q, Peng Y. Synthesis of 3-trifluoromethylindoles via Rh-catalyzed regioselective oxidative coupling of acetanilides with trifluoromethylated alkynes. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Kondo Y, Abe M, Denneval C, Nozawa-Kumada K. Development of Madelung-Type Indole Synthesis Using Copper-Catalyzed Amidation/Condensation Strategy. HETEROCYCLES 2016. [DOI: 10.3987/com-16-13440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Song S, Huang M, Li W, Zhu X, Wan Y. Efficient synthesis of indoles from 2-alkynylaniline derivatives in water using a recyclable copper catalyst system. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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