1
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Kumar S, Kajol K, Nayak P, Kumar A, Ramesh C. Synthesis of tetracyclic 4H-benzo[5,6]chromeno[3,4-d]oxazoles via palladium-catalyzed intramolecular direct heteroarylation. Chem Asian J 2023; 18:e202201151. [PMID: 36519340 DOI: 10.1002/asia.202201151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
We report a palladium-catalyzed intramolecular direct heteroarylation of oxazole tethered β-naphthols to access corresponding tetracyclic 4H-benzo[5,6]chromeno[3,4-d]oxazoles. Various functional groups are well tolerated and furnished the desired products in good to excellent yields under the present reaction conditions. The scale-up reaction and synthetic utility of the resulting molecules have been demonstrated. Moreover, UV/vis absorption and fluorescence emission properties have been evaluated for these polyheterocyclic compounds.
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Affiliation(s)
- Sujeet Kumar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research, New Delhi, 110001, India
| | - Km Kajol
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India
| | - Prakash Nayak
- School of Chemical Sciences National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar, 752050, Odisha, India
| | - Amit Kumar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research, New Delhi, 110001, India
| | - Chintakunta Ramesh
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research, New Delhi, 110001, India
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2
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Manna K, Jana R. Palladium-Catalyzed Cross-Electrophile Coupling between Aryl Diazonium Salt and Aryl Iodide/Diaryliodonium Salt in H 2O-EtOH. Org Lett 2023; 25:341-346. [PMID: 36607149 DOI: 10.1021/acs.orglett.2c03932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report herein a mild highly chemoselective palladium-catalyzed cross-electrophile coupling between readily accessible aromatic diazonium salt and aryl iodide or diaryliodonium salt in water-ethanol (2:1) medium. Mechanistic studies revealed that ethanol is crucial to generate an active Pd(0) catalyst, and the counterion of the diazonium salt renders a cationic Pd(II) species that facilitates subsequent oxidative addition to aryl iodide/diaryliodonium salt. Silver(I) salt was crucial to retain the catalytic activity of palladium, removing the iodide ion as a precipitate.
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Affiliation(s)
- Kartic Manna
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, West Bengal, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India
| | - Ranjan Jana
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, West Bengal, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India
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3
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Km K, Kumar S, Kumar A, Kant R, Chintakunta R. Palladium‐Catalyzed Intramolecular C‐H Heteroarylation to Access Fused Tricyclic Oxazolo[4,5‐c]Quinolines. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200066] [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)
- Kajol Km
- CSIR-CDRI: Central Drug Research Institute Medicinal & Process Chemistry Division CSIR-CDRI, Lucknow, UP, India 226031 LUCKNOW INDIA
| | - Sujeet Kumar
- CSIR-CDRI: Central Drug Research Institute Medicinal & Process Chemistry Division CSIR-CDRI, Lucknow, UP, India 226031 LUCKNOW INDIA
| | - Amit Kumar
- CSIR-CDRI: Central Drug Research Institute Medicinal & Process Chemistry Division CSIR-CDRI, Lucknow, UP, India 226031 LUCKNOW INDIA
| | - Ruchir Kant
- CSIR-CDRI: Central Drug Research Institute Medicinal & Process Chemistry Division CSIR-CDRI, Lucknow, UP, India 226031 LUCKNOW INDIA
| | - Ramesh Chintakunta
- CSIR-CDRI: Central Drug Research Institute Medicinal and Process Chemistry Division CSIR-CDRI, Lucknow, UP, India 226031 LUCKNOW INDIA
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4
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Cheng H, Yang T, Edwards M, Tang S, Xu S, Yan X. Picomole-Scale Transition Metal Electrocatalysis Screening Platform for Discovery of Mild C-C Coupling and C-H Arylation through in Situ Anodically Generated Cationic Pd. J Am Chem Soc 2022; 144:1306-1312. [PMID: 35015550 DOI: 10.1021/jacs.1c11179] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Development of new transition-metal-catalyzed electrochemistry promises to improve overall synthetic efficiency. Here, we describe the first integrated platform for online screening of electrochemical transition-metal catalysis. It utilizes the intrinsic electrochemical capabilities of nanoelectrospray ionization mass spectrometry (nano-ESI-MS) and picomole-scale anodic corrosion of a Pd electrode to generate and evaluate highly efficient cationic catalysts for mild electrocatalysis. We demonstrate the power of the novel electrocatalysis platform by (1) identifying electrolytic Pd-catalyzed Suzuki coupling at room temperature, (2) discovering Pd-catalyzed electrochemical C-H arylation in the absence of external oxidant or additive, (3) developing electrolyzed Suzuki coupling/C-H arylation cascades, and (4) achieving late-stage functionalization of two drug molecules by the newly developed mild electrocatalytic C-H arylation. More importantly, the scale-up reactions confirm that new electrochemical pathways discovered by nano-ESI can be implemented under the conventional electrolytic reaction conditions. This approach enables in situ mechanistic studies by capturing various intermediates including transient transition metal species by MS, and thus uncovering the critical role of anodically generated cationic Pd catalyst in promoting otherwise sluggish transmetalation in C-H arylation. The anodically generated cationic Pd with superior catalytic efficiency and novel online electrochemical screening platform hold great potential for discovering mild transition-metal-catalyzed reactions.
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Affiliation(s)
- Heyong Cheng
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States.,College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Tingyuan Yang
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Madison Edwards
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Shuli Tang
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Shiqing Xu
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Xin Yan
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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5
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Hauk P, Wencel-Delord J, Ackermann L, Walde P, Gallou F. Organic synthesis in Aqueous Multiphase Systems — Challenges and opportunities ahead of us. Curr Opin Colloid Interface Sci 2021. [DOI: 10.1016/j.cocis.2021.101506] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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6
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Faarasse S, El Brahmi N, Guillaumet G, El Kazzouli S. Regioselective C-H Functionalization of the Six-Membered Ring of the 6,5-Fused Heterocyclic Systems: An Overview. Molecules 2021; 26:5763. [PMID: 34641306 PMCID: PMC8510187 DOI: 10.3390/molecules26195763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/20/2021] [Accepted: 09/21/2021] [Indexed: 11/16/2022] Open
Abstract
The regioselective C-H functionalization of the five-membered ring of the 6,5-fused heterocyclic systems is nowadays well documented due to its high reactivity compared to the six-membered ring. So, developing new procedures of C-H functionalization of the six-membered ring "by thinking out of the box" is extremely challenging, which explains the limited number of reports published to date. This review paper aims to highlight advances achieved in this emerging chemistry research and discusses recently reported methods.
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Affiliation(s)
- Soukaina Faarasse
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
- Institute of Organic and Analytical Chemistry, University of Orleans, UMR CNRS 7311, BP 6759, CEDEX 2, 45067 Orleans, France
| | - Nabil El Brahmi
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
| | - Gérald Guillaumet
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
- Institute of Organic and Analytical Chemistry, University of Orleans, UMR CNRS 7311, BP 6759, CEDEX 2, 45067 Orleans, France
| | - Saïd El Kazzouli
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
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7
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Murali K, Machado LA, Carvalho RL, Pedrosa LF, Mukherjee R, Da Silva Júnior EN, Maiti D. Decoding Directing Groups and Their Pivotal Role in C-H Activation. Chemistry 2021; 27:12453-12508. [PMID: 34038596 DOI: 10.1002/chem.202101004] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Indexed: 12/14/2022]
Abstract
Synthetic organic chemistry has witnessed a plethora of functionalization and defunctionalization strategies. In this regard, C-H functionalization has been at the forefront due to the multifarious applications in the development of simple to complex molecular architectures and holds a brilliant prospect in drug development and discovery. Despite been explored tremendously by chemists, this functionalization strategy still enjoys the employment of novel metal catalysts as well metal-free organic ligands. Moreover, the switch to photo- and electrochemistry has widened our understanding of the alternative pathways via which a reaction can proceed and these strategies have garnered prominence when applied to C-H activation. Synthetic chemists have been foraging for new directing groups and templates for the selective activation of C-H bonds from a myriad of carbon-hydrogen bonds in aromatic as well as aliphatic systems. As a matter of fact, by varying the templates and directing groups, scientists found the answer to the challenge of distal C-H bond activation which remained an obstacle for a very long time. These templates have been frequently harnessed for selectively activating C-H bonds of natural products, drugs, and macromolecules decorated with multiple C-H bonds. This itself was a challenge before the commencement of this field as functionalization of a site other than the targeted site could modify and hamper the biological activity of the pharmacophore. Total synthesis and pharmacophore development often faces the difficulty of superfluous reaction steps towards selective functionalization. This obstacle has been solved by late-stage functionalization simply by harnessing C-H bond activation. Moreover, green chemistry and metal-free reaction conditions have seen light in the past few decades due to the rising concern about environmental issues. Therefore, metal-free catalysts or the usage of non-toxic metals have been recently showcased in a number of elegant works. Also, research groups across the world are developing rational strategies for directing group free or non-directed protocols that are just guided by ligands. This review encapsulates the research works pertinent to C-H bond activation and discusses the science devoted to it at the fundamental level. This review gives the readers a broad understanding of how these strategies work, the execution of various metal catalysts, and directing groups. This not only helps a budding scientist towards the commencement of his/her research but also helps a matured mind searching out for selective functionalization. A detailed picture of this field and its progress with time has been portrayed in lucid scientific language with a motive to inculcate and educate scientific minds about this beautiful strategy with an overview of the most relevant and significant works of this era. The unique trait of this review is the detailed description and classification of various directing groups and their utility over a wide substrate scope. This allows an experimental chemist to understand the applicability of this domain and employ it over any targeted substrate.
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Affiliation(s)
- Karunanidhi Murali
- Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG, Brazil
| | - Luana A Machado
- Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG, Brazil.,Department of Chemistry, Fluminense Federal University, Niteroi, 24020-141, RJ, Brazil
| | - Renato L Carvalho
- Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, 31270-901, MG, Brazil
| | - Leandro F Pedrosa
- Department of Chemistry, Fluminense Federal University, Niteroi, 24020-141, RJ, Brazil
| | - Rishav Mukherjee
- Department of Chemistry IIT Bombay, Powai, Mumbai, 400076, India
| | | | - Debabrata Maiti
- Department of Chemistry IIT Bombay, Powai, Mumbai, 400076, India
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8
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Feng E, Ma X, Kenttämaa HI. Characterization of Protonated Substituted Ureas by Using Diagnostic Gas-Phase Ion-Molecule Reactions Followed by Collision-Activated Dissociation in Tandem Mass Spectrometry Experiments. Anal Chem 2021; 93:7851-7859. [PMID: 34028247 DOI: 10.1021/acs.analchem.1c00326] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Substituted ureas correspond to a class of organic compounds commonly used in agricultural and chemical fields. However, distinguishing between different ureas and differentiating substituted ureas from other compounds with similar structures, such as amides, N-oxides, and carbamates, are challenging. In this paper, a four-stage tandem mass spectrometry method (MS4) is introduced for this purpose. This method is based on gas-phase ion-molecule reactions of isolated, protonated analytes ([M + H]+) with tris(dimethylamino)borane (TDMAB) (MS2) followed by subjecting a diagnostic product ion to two steps of collision-activated dissociation (CAD) (MS3 and MS4). All the analyte ions reacted with TDMAB to form a product ion [M + H + TDMAB - HN(CH3)2]+. The product ion formed for substituted ureas and amides eliminated another HN(CH3)2 molecule upon CAD to generate a fragment ion [M + H + TDMAB - 2HN(CH3)2]+, which was not observed for many other analytes, such as N-oxides, sulfoxides, and pyridines (studied previously). When the [M + H + TDMAB - 2HN(CH3)2]+ fragment ion was subjected to CAD, different fragment ions were generated for ureas, amides, and carbamates. Fragment ions diagnostic for the ureas were formed via elimination of R-N═C═O (R = hydrogen atom or a substituent), which enabled the differentiation of ureas from amides and carbamates. Furthermore, these fragment ions can be utilized to classify differently substituted ureas. Quantum chemical calculations were employed to explore the mechanisms of the reactions. The limit of detection for the diagnostic ion-molecule reaction product ion in HPLC/MS2 experiments was found to range from 20 to 100 nM.
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Affiliation(s)
- Erlu Feng
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xin Ma
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Hilkka I Kenttämaa
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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9
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Tóth BL, Monory A, Egyed O, Domján A, Bényei A, Szathury B, Novák Z, Stirling A. The ortho effect in directed C-H activation. Chem Sci 2021; 12:5152-5163. [PMID: 34163752 PMCID: PMC8179598 DOI: 10.1039/d1sc00642h] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 02/20/2021] [Indexed: 12/12/2022] Open
Abstract
The success of transition metal-catalysed ortho-directed C-H activation is often plagued by the effects of undesirable interactions between the directing group (DG) and other groups introduced into the aromatic core of the substrate. In particular, when these groups are in neighbouring positions, their interactions can affect profoundly the efficacy of the C-H activation by transition metals. In this work we introduce a simple substrate-only-based model to interpret the influence of steric hindrance of a group in ortho position to the DG in directed ortho-C-H bond activation reactions, and coined the term Ortho Effect (OE) for such situations. We consider simple descriptors such as torsion angle and torsional energy to predict and explain the reactivity of a given substrate in directed C-H activation reactions. More than 250 examples have been invoked for the model, and the nature of the ortho effect was demonstrated on a wide variety of structures. In order to guide organic chemists, we set structural and energetic criteria to evaluate a priori the efficiency of the metalation step which is usually the rate-determining event in C-H activations, i.e. we provide a simple and general protocol to estimate the reactivity of a potential substrate in C-H activation. For borderline cases these criteria help set the minimum reaction temperature to obtain reasonable reaction rates. As an example for the practical applicability of the model, we performed synthetic validations via palladium-catalysed 2,2,2-trifluoroethylation reactions in our lab. Furthermore, we give predictions for the necessary reaction conditions for several selected DGs.
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Affiliation(s)
- Balázs L Tóth
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Faculty of Science, Institute of Chemistry, Eötvös Loránd University Pázmány Péter Sétány. 1/A H-1117 Budapest Hungary
| | - Anna Monory
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Faculty of Science, Institute of Chemistry, Eötvös Loránd University Pázmány Péter Sétány. 1/A H-1117 Budapest Hungary
| | - Orsolya Egyed
- Research Centre for Natural Sciences, Eötvös Loránd Research Network Magyar Tudósok Körútja 2 H-1117 Budapest Hungary
| | - Attila Domján
- Research Centre for Natural Sciences, Eötvös Loránd Research Network Magyar Tudósok Körútja 2 H-1117 Budapest Hungary
| | - Attila Bényei
- Department of Physical Chemistry, University of Debrecen Egyetem Tér 1 H-4032 Debrecen Hungary
| | - Bálint Szathury
- Department of Chemistry, University of Cambridge Lensfield Rd Cambridge CB2 1EW UK
| | - Zoltán Novák
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Faculty of Science, Institute of Chemistry, Eötvös Loránd University Pázmány Péter Sétány. 1/A H-1117 Budapest Hungary
| | - András Stirling
- Research Centre for Natural Sciences, Eötvös Loránd Research Network Magyar Tudósok Körútja 2 H-1117 Budapest Hungary
- Department of Chemistry, Eszterházy Károly University Leányka u. 6 H-3300 Eger Hungary
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10
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Babu SS, Muthuraja P, Yadav P, Gopinath P. Aryldiazonium Salts in Photoredox Catalysis – Recent Trends. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100136] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Sakamuri Sarath Babu
- Department of Chemistry Indian Institute of Science Education and Research Tirupati Tirupati, A.P. India
| | - P. Muthuraja
- Department of Chemistry Indian Institute of Science Education and Research Tirupati Tirupati, A.P. India
| | - Pooja Yadav
- Department of Chemistry Indian Institute of Science Education and Research Tirupati Tirupati, A.P. India
| | - Purushothaman Gopinath
- Department of Chemistry Indian Institute of Science Education and Research Tirupati Tirupati, A.P. India
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11
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Calascibetta AM, Mattiello S, Sanzone A, Facchinetti I, Sassi M, Beverina L. Sustainable Access to π-Conjugated Molecular Materials via Direct (Hetero)Arylation Reactions in Water and under Air. Molecules 2020; 25:E3717. [PMID: 32824058 PMCID: PMC7465621 DOI: 10.3390/molecules25163717] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/10/2020] [Accepted: 08/13/2020] [Indexed: 11/16/2022] Open
Abstract
Direct (hetero)arylation (DHA) is playing a key role in improving the efficiency and atom economy of C-C cross coupling reactions, so has impacts in pharmaceutical and materials chemistry. Current research focuses on further improving the generality, efficiency and selectivity of the method through careful tuning of the reaction conditions and the catalytic system. Comparatively fewer studies are dedicated to the replacement of the high-boiling-point organic solvents dominating the field and affecting the overall sustainability of the method. We show herein that the use of a 9:1 v/v emulsion of an aqueous Kolliphor 2 wt% solution while having toluene as the reaction medium enables the preparation of relevant examples of thiophene-containing π-conjugated building blocks in high yield and purity.
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Affiliation(s)
- Adiel Mauro Calascibetta
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi, 55, I-20125 Milano, Italy; (A.M.C.); (A.S.); (I.F.)
| | - Sara Mattiello
- Department of Materials Science, University of Milano-Bicocca and INSTM, Via R. Cozzi, 55, I-20125 Milano, Italy; (S.M.); (M.S.)
| | - Alessandro Sanzone
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi, 55, I-20125 Milano, Italy; (A.M.C.); (A.S.); (I.F.)
| | - Irene Facchinetti
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi, 55, I-20125 Milano, Italy; (A.M.C.); (A.S.); (I.F.)
| | - Mauro Sassi
- Department of Materials Science, University of Milano-Bicocca and INSTM, Via R. Cozzi, 55, I-20125 Milano, Italy; (S.M.); (M.S.)
| | - Luca Beverina
- Department of Materials Science, University of Milano-Bicocca and INSTM, Via R. Cozzi, 55, I-20125 Milano, Italy; (S.M.); (M.S.)
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12
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Babu SS, Shahid M, Gopinath P. Dual palladium-photoredox catalyzed chemoselective C-H arylation of phenylureas. Chem Commun (Camb) 2020; 56:5985-5988. [PMID: 32347860 DOI: 10.1039/d0cc01443e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly chemoselective C-H arylation of phenylureas has been accomplished using dual palladium-photoredox catalysis at room temperature without any additives, base or external oxidants. Regioselective C-H arylation of N,N'-diaryl substituted unsymmetrical phenylureas has also been accomplished by a careful choice of aryl groups.
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Affiliation(s)
- Sakamuri Sarath Babu
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India.
| | - M Shahid
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India.
| | - Purushothaman Gopinath
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India.
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13
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Lee JB, Jeon MH, Seo JK, von Helden G, Rohde JU, Zhao BS, Seo J, Hong SY. Annulative π-Extension of Unactivated Benzene Derivatives through Nondirected C-H Arylation. Org Lett 2019; 21:7004-7008. [PMID: 31403311 DOI: 10.1021/acs.orglett.9b02583] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Annulative π-extension chemistry provides a concise synthetic route to polycyclic arenes. Herein, we disclose a nondirected annulation approach of unactivated simple arenes. The palladium-catalyzed 2-fold C-H arylation event facilitates tandem C-C linkage relays to furnish fully benzenoid triphenylene frameworks using cyclic diaryliodonium salts. The inseparable regioisomeric mixture of 1- and 2-methyltriphenylenes is identified by the combined analysis of ion mobility-mass spectrometry, gas-phase infrared spectroscopy, and molecular simulation studies.
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Affiliation(s)
- Jae Bin Lee
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Korea
| | - Min Ho Jeon
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Korea
| | | | - Gert von Helden
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin 14195, Germany
| | | | - Bum Suk Zhao
- Department of Chemistry, UNIST, Ulsan 44919, Korea
| | - Jongcheol Seo
- Department of Chemistry, POSTECH, Pohang 37673, Korea
| | - Sung You Hong
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Korea
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14
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Brunzel T, Heppekausen J, Panten J, Köckritz A. Selective Wacker type oxidation of a macrocyclic diene to the corresponding monounsaturated ketone used as fragrance. RSC Adv 2019; 9:27865-27873. [PMID: 35530498 PMCID: PMC9070781 DOI: 10.1039/c9ra04971a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 08/24/2019] [Indexed: 11/21/2022] Open
Abstract
A selective reaction method for the efficient conversion of an isomeric mixture of 1,9-cyclohexadecadiene (1,9-CHDD) to the corresponding monounsaturated cyclohexadec-8-en-1-one (8-CHD) is described. 8-CHD was synthesized via Wacker type oxidation at room temperature using a highly electrophilic in situ formed dicationic palladium species. Isomerisation of the diene and over-oxidation of the substrate could be nearly suppressed by suitable reaction control, which has a positive effect on selectivity. The utilization of molecular oxygen as a green oxidant and environmentally benign iron(iii) salts as co-catalysts was successfully applied. This reaction strategy is promising to overcome the low overall reactivity of internal olefins in Wacker type oxidations. In addition, larger scale experiments showed further potential for industrial application. A selective reaction method for the efficient conversion of an isomeric mixture of 1,9-cyclohexadecadiene (1,9-CHDD) to the corresponding monounsaturated cyclohexadec-8-en-1-one (8-CHD) is described.![]()
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Affiliation(s)
- Tom Brunzel
- Leibniz Institute for Catalysis at the University of Rostock Albert-Einstein-Straße 29a 18059 Rostock Germany
| | | | | | - Angela Köckritz
- Leibniz Institute for Catalysis at the University of Rostock Albert-Einstein-Straße 29a 18059 Rostock Germany
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15
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Zhu G, Shi W, Gao H, Zhou Z, Song H, Yi W. Chemodivergent Couplings of N-Arylureas and Methyleneoxetanones via Rh(III)-Catalyzed and Solvent-Controlled C–H Activation. Org Lett 2019; 21:4143-4147. [PMID: 31124685 DOI: 10.1021/acs.orglett.9b01333] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guoxun Zhu
- School of Chemical Engineering and Technology, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Wendi Shi
- School of Chemical Engineering and Technology, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Hui Gao
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Zhi Zhou
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Huacan Song
- School of Chemical Engineering and Technology, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Wei Yi
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
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16
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Yetra SR, Rogge T, Warratz S, Struwe J, Peng W, Vana P, Ackermann L. Mizellare Katalyse für Ruthenium(II)‐katalysierte C‐H‐Arylierung: Schwache Koordination ermöglicht C‐H‐Aktivierung in H
2
O. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901856] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Santhivardhana Reddy Yetra
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Torben Rogge
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Svenja Warratz
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Julia Struwe
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Wentao Peng
- Institut für Physikalische ChemieGeorg-August-Universität Göttingen Tammannstraße 6 37077 Göttingen Deutschland
| | - Philipp Vana
- Institut für Physikalische ChemieGeorg-August-Universität Göttingen Tammannstraße 6 37077 Göttingen Deutschland
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
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17
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Yetra SR, Rogge T, Warratz S, Struwe J, Peng W, Vana P, Ackermann L. Micellar Catalysis for Ruthenium(II)-Catalyzed C-H Arylation: Weak-Coordination-Enabled C-H Activation in H 2 O. Angew Chem Int Ed Engl 2019; 58:7490-7494. [PMID: 30860636 DOI: 10.1002/anie.201901856] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/04/2019] [Indexed: 11/06/2022]
Abstract
Chemoselective C-H arylations were accomplished through micellar catalysis by a versatile single-component ruthenium catalyst. The strategy provided expedient access to C-H-arylated ferrocenes with wide functional-group tolerance and ample scope through weak chelation assistance. The sustainability of the C-H arylation was demonstrated by outstanding atom-economy and recycling studies. Detailed computational studies provided support for a facile C-H activation through thioketone assistance.
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Affiliation(s)
- Santhivardhana Reddy Yetra
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Torben Rogge
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Svenja Warratz
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Julia Struwe
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Wentao Peng
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstrasse 6, 37077, Göttingen, Germany
| | - Philipp Vana
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstrasse 6, 37077, Göttingen, Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
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18
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Polley A, Varalaxmi K, Jana R. Palladium-Catalyzed Ortho C-H Arylation of Aniline Carbamates with Diazonium Salts under Mild Conditions: Expedient Synthesis of Carbazole Alkaloids. ACS OMEGA 2018; 3:14503-14516. [PMID: 31458136 PMCID: PMC6644385 DOI: 10.1021/acsomega.8b02009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 10/19/2018] [Indexed: 06/10/2023]
Abstract
Despite the significant progress, C-H arylation with aryldiazonium salts is a major challenge because of the faster rate of oxidative addition compared to the C-H insertion, leading to a deleterious homocoupling product. Recently, this limitation has been overcome by merging a photoredox catalyst with transition-metal catalysts which proceeds through a distinct single electron-transfer mechanism. However, we have observed that the photoredox catalyst is not necessary for the C-H arylation of aniline rather chemical reactivity can be controlled by tuning the electronic nature of the substrate. We report, herein, a palladium-catalyzed C-H arylation of aniline carbamates with aryldiazonium salts under external oxidant, acid, base free conditions at room temperature. Mechanistic studies suggest that the present reaction proceeds through a directed electrophilic metalation pathway which is the slowest step. However, the oxidative addition may take place through either ionic (2e-) or radical (1e-) pathway to generate hypervalent Pd(IV) or Pd(III) intermediate, respectively. A facile reductive elimination from the hypervalent palladium complex furnishes the C-H arylation product under mild conditions. The carbamate directing group is easily removed from the product to obtain the corresponding ortho-arylated aniline, which is a precursor for plethora of carbazole alkaloids and other biologically active molecules. The reaction is scaled-up to gram scale to furnish the desired product in comparable yields. Finally, we have applied this C-H arylation methodology for the synthesis of series of carbazole alkaloids such as clausine V, clauszoline K, O-methoxymahanine, and O-methylmurrayamine-D.
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Affiliation(s)
- Arghya Polley
- Organic
and Medicinal Chemistry Division, CSIR-Indian
Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West
Bengal, India
- Academy
of Scientific and Innovative Research (AcSIR), Kolkata 700032, West Bengal, India
| | - Kasarla Varalaxmi
- Organic
and Medicinal Chemistry Division, CSIR-Indian
Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West
Bengal, India
- National
Institute of Pharmaceutical Education and Research, Kolkata 700054, West Bengal, India
| | - Ranjan Jana
- Organic
and Medicinal Chemistry Division, CSIR-Indian
Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West
Bengal, India
- Academy
of Scientific and Innovative Research (AcSIR), Kolkata 700032, West Bengal, India
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19
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Devendar P, Qu RY, Kang WM, He B, Yang GF. Palladium-Catalyzed Cross-Coupling Reactions: A Powerful Tool for the Synthesis of Agrochemicals. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:8914-8934. [PMID: 30060657 DOI: 10.1021/acs.jafc.8b03792] [Citation(s) in RCA: 198] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Pd-catalyzed cross-coupling reactions have become essential tools for the construction of carbon-carbon and carbon-heteroatom bonds. Over the last three decades, great efforts have been made with cross-coupling chemistry in the discovery, development, and commercialization of innovative new pharmaceuticals and agrochemicals (mainly herbicides, fungicides, and insecticides). In view of the growing interest in both modern crop protection and cross-coupling chemistry, this review gives a comprehensive overview of the successful applications of various Pd-catalyzed cross-coupling methodologies, which have been implemented as key steps in the synthesis of agrochemicals (on R&D and pilot-plant scales) such as the Heck, Suzuki, Sonogashira, Stille, and Negishi reactions, as well as decarboxylative, carbonylative, α-arylative, and carbon-nitrogen bond bond-forming cross-coupling reactions. Some perspectives and challenges for these catalytic coupling processes in the discovery of agrochemicals are briefly discussed in the final section. The examples chosen demonstrate that cross-coupling chemistry approaches open-up new, low-cost, and more efficient industrial routes to existing agrochemicals, and such methods also have the capability to lead the new generation of pesticides with novel modes of action for sustainable crop protection.
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Affiliation(s)
- Ponnam Devendar
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry , Central China Normal University (CCNU) , Wuhan 430079 , P. R. China
- International Joint Research Center for Intelligent Biosensor Technology and Health , Central China Normal University (CCNU) , Wuhan 430079 , P. R. China
| | - Ren-Yu Qu
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry , Central China Normal University (CCNU) , Wuhan 430079 , P. R. China
- International Joint Research Center for Intelligent Biosensor Technology and Health , Central China Normal University (CCNU) , Wuhan 430079 , P. R. China
| | - Wei-Ming Kang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry , Central China Normal University (CCNU) , Wuhan 430079 , P. R. China
- International Joint Research Center for Intelligent Biosensor Technology and Health , Central China Normal University (CCNU) , Wuhan 430079 , P. R. China
| | - Bo He
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry , Central China Normal University (CCNU) , Wuhan 430079 , P. R. China
- International Joint Research Center for Intelligent Biosensor Technology and Health , Central China Normal University (CCNU) , Wuhan 430079 , P. R. China
| | - Guang-Fu Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry , Central China Normal University (CCNU) , Wuhan 430079 , P. R. China
- International Joint Research Center for Intelligent Biosensor Technology and Health , Central China Normal University (CCNU) , Wuhan 430079 , P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300071 , P. R. China
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20
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Sambiagio C, Schönbauer D, Blieck R, Dao-Huy T, Pototschnig G, Schaaf P, Wiesinger T, Zia MF, Wencel-Delord J, Besset T, Maes BUW, Schnürch M. A comprehensive overview of directing groups applied in metal-catalysed C-H functionalisation chemistry. Chem Soc Rev 2018; 47:6603-6743. [PMID: 30033454 PMCID: PMC6113863 DOI: 10.1039/c8cs00201k] [Citation(s) in RCA: 1105] [Impact Index Per Article: 184.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Indexed: 12/20/2022]
Abstract
The present review is devoted to summarizing the recent advances (2015-2017) in the field of metal-catalysed group-directed C-H functionalisation. In order to clearly showcase the molecular diversity that can now be accessed by means of directed C-H functionalisation, the whole is organized following the directing groups installed on a substrate. Its aim is to be a comprehensive reference work, where a specific directing group can be easily found, together with the transformations which have been carried out with it. Hence, the primary format of this review is schemes accompanied with a concise explanatory text, in which the directing groups are ordered in sections according to their chemical structure. The schemes feature typical substrates used, the products obtained as well as the required reaction conditions. Importantly, each example is commented on with respect to the most important positive features and drawbacks, on aspects such as selectivity, substrate scope, reaction conditions, directing group removal, and greenness. The targeted readership are both experts in the field of C-H functionalisation chemistry (to provide a comprehensive overview of the progress made in the last years) and, even more so, all organic chemists who want to introduce the C-H functionalisation way of thinking for a design of straightforward, efficient and step-economic synthetic routes towards molecules of interest to them. Accordingly, this review should be of particular interest also for scientists from industrial R&D sector. Hence, the overall goal of this review is to promote the application of C-H functionalisation reactions outside the research groups dedicated to method development and establishing it as a valuable reaction archetype in contemporary R&D, comparable to the role cross-coupling reactions play to date.
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Affiliation(s)
- Carlo Sambiagio
- Organic Synthesis (ORSY)
, Department of Chemistry
, University of Antwerp
,
Groenenborgerlaan 171
, 2020 Antwerp
, Belgium
| | - David Schönbauer
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Remi Blieck
- Normandie Univ
, INSA Rouen
, UNIROUEN
, CNRS
, COBRA (UMR 6014)
,
76000 Rouen
, France
| | - Toan Dao-Huy
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Gerit Pototschnig
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Patricia Schaaf
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Thomas Wiesinger
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Muhammad Farooq Zia
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Joanna Wencel-Delord
- Laboratoire de Chimie Moléculaire (UMR CNRS 7509)
, Université de Strasbourg
,
ECPM 25 Rue Becquerel
, 67087 Strasbourg
, France
| | - Tatiana Besset
- Normandie Univ
, INSA Rouen
, UNIROUEN
, CNRS
, COBRA (UMR 6014)
,
76000 Rouen
, France
| | - Bert U. W. Maes
- Organic Synthesis (ORSY)
, Department of Chemistry
, University of Antwerp
,
Groenenborgerlaan 171
, 2020 Antwerp
, Belgium
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
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21
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Shaik JB, Ramkumar V, Sankararaman S. Synthesis of a new class of cationic Pd(II) complexes with 1,2,3-triazol-5-ylidene ligand and their catalytic application in the conversion of internal alkynes to 1,2-diketones. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.02.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Simkó DC, Elekes P, Pázmándi V, Novák Z. Sulfonium Salts as Alkylating Agents for Palladium-Catalyzed Direct Ortho Alkylation of Anilides and Aromatic Ureas. Org Lett 2018; 20:676-679. [PMID: 29327592 DOI: 10.1021/acs.orglett.7b03813] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel method for the ortho alkylation of acetanilide and aromatic urea derivatives via C-H activation was developed. Alkyl dibenzothiophenium salts are considered to be new reagents for the palladium-catalyzed C-H activation reaction, which enables the transfer of methyl and other alkyl groups from the sulfonium salt to the aniline derivatives under mild catalytic conditions.
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Affiliation(s)
- Dániel Cs Simkó
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Department of Organic Chemistry, Faculty of Science, Eötvös University , Pázmány P. stny. 1/A, H-1117 Budapest, Hungary
| | - Péter Elekes
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Department of Organic Chemistry, Faculty of Science, Eötvös University , Pázmány P. stny. 1/A, H-1117 Budapest, Hungary
| | - Vivien Pázmándi
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Department of Organic Chemistry, Faculty of Science, Eötvös University , Pázmány P. stny. 1/A, H-1117 Budapest, Hungary
| | - Zoltán Novák
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Department of Organic Chemistry, Faculty of Science, Eötvös University , Pázmány P. stny. 1/A, H-1117 Budapest, Hungary
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23
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Synthesis and reactivity of a cationic palladium complex as possible intermediate in a Suzuki-Miyaura cross-coupling reaction. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.08.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Chen L, Sanchez DR, Zhang B, Carrow BP. “Cationic” Suzuki–Miyaura Coupling with Acutely Base-Sensitive Boronic Acids. J Am Chem Soc 2017; 139:12418-12421. [DOI: 10.1021/jacs.7b07687] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Liye Chen
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Daniel R. Sanchez
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Bufan Zhang
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Brad P. Carrow
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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25
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Ahanthem D, Laitonjam WS. C(sp2
)−O Bond Formation through a Nickel-Catalyzed Cross-Coupling Reaction in Water Enabled by Micellar Catalysis. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700324] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dini Ahanthem
- Chemistry Department; Manipur University; Manipur India
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26
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Gorsline BJ, Wang L, Ren P, Carrow BP. C–H Alkenylation of Heteroarenes: Mechanism, Rate, and Selectivity Changes Enabled by Thioether Ligands. J Am Chem Soc 2017. [DOI: 10.1021/jacs.7b03887] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bradley J. Gorsline
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Long Wang
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Peng Ren
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Brad P. Carrow
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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27
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Chen SS, Wu MS, Han ZY. Palladium-Catalyzed Cascade sp 2 C-H Functionalization/Intramolecular Asymmetric Allylation: From Aryl Ureas and 1,3-Dienes to Chiral Indolines. Angew Chem Int Ed Engl 2017; 56:6641-6645. [PMID: 28467624 DOI: 10.1002/anie.201702745] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Indexed: 11/10/2022]
Abstract
A chiral PdII -catalyzed cascade sp2 C-H functionalization/intramolecular asymmetric allylation reaction is reported. A new chiral sulfoxide-oxazoline (SOX) ligand bearing single chiral center on the sulfur was identified as the optimal ligand for the reaction, being efficient both in the C-H cleavage step and the stereocontrol of the allylation step. The broad scope of this method with respect to aryl ureas and 1,3-dienes enables the rapid construction of valuable chiral indoline derivatives with high yields and enantioselectivities (up to 99 % yield, up to 95:5 e.r.).
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Affiliation(s)
- Shu-Sen Chen
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Min-Song Wu
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Zhi-Yong Han
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
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28
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Chen SS, Wu MS, Han ZY. Palladium-Catalyzed Cascade sp2C−H Functionalization/Intramolecular Asymmetric Allylation: From Aryl Ureas and 1,3-Dienes to Chiral Indolines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702745] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Shu-Sen Chen
- Department of Chemistry; University of Science and Technology of China; Hefei 230026 China
| | - Min-Song Wu
- Department of Chemistry; University of Science and Technology of China; Hefei 230026 China
| | - Zhi-Yong Han
- Department of Chemistry; University of Science and Technology of China; Hefei 230026 China
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29
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Sarpong R. C-H Functionalization/activation in organic synthesis. Beilstein J Org Chem 2017; 12:2315-2316. [PMID: 28144298 PMCID: PMC5238585 DOI: 10.3762/bjoc.12.224] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 09/29/2016] [Indexed: 12/20/2022] Open
Affiliation(s)
- Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, 841A Latimer Hall, Berkeley, CA 94720, USA
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30
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Lv H, Shi J, Huang J, Zhang C, Yi W. Rhodium(iii)-catalyzed and MeOH-involved regioselective mono-alkenylation of N-arylureas with acrylates. Org Biomol Chem 2017; 15:7088-7092. [PMID: 28805855 DOI: 10.1039/c7ob01627a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A new and versatile Rh(iii)-catalyzed C–H activation/alkenylation/MeOH-involved ammonolysis/esterification cascade reaction has been disclosed.
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Affiliation(s)
- Honggui Lv
- Key Laboratory of Molecular Clinical Pharmacology & Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- P. R. China
- VARI/SIMM Center
| | - Jingjing Shi
- VARI/SIMM Center
- Center for Structure and Function of Drug Targets
- CAS-Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
| | - Junjun Huang
- Key Laboratory of Molecular Clinical Pharmacology & Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- P. R. China
| | - Chao Zhang
- Key Laboratory of Molecular Clinical Pharmacology & Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- P. R. China
| | - Wei Yi
- Key Laboratory of Molecular Clinical Pharmacology & Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- P. R. China
- VARI/SIMM Center
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