1
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Martinho LA, Andrade CKZ. HPW-Catalyzed environmentally benign approach to imidazo[1,2- a]pyridines. Beilstein J Org Chem 2024; 20:628-637. [PMID: 38533469 PMCID: PMC10964034 DOI: 10.3762/bjoc.20.55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 03/05/2024] [Indexed: 03/28/2024] Open
Abstract
The imidazo[1,2-a]pyridine moiety is present in drugs with several biological activities. The most direct way of obtaining this nucleus is the Groebke-Blackburn-Bienaymé three-component reaction (GBB-3CR) between aminopyridines, aldehydes, and isocyanides under both Lewis and Brønsted acid catalysis. However, several catalysts for this reaction have major drawbacks such as being expensive, extremely dangerous, strong oxidizing, and even explosive. In this scenario, heteropolyacids emerge as greener and safer alternatives due to their very strong Brønsted acidity. In particular, phosphotungstic acid (HPW) is an economical and green attractive catalyst for being cheap, non-toxic, and is known for its chemical and thermal stability. Herein, we report a straightforward approach to the GBB-3CR using HPW as catalyst in ethanol under microwave (μw) heating. This convenient environmentally benign methodology is broad in scope, provides the heterobicyclic products in high yields (up to 99%), with a low catalyst loading (2 mol %) in only 30 minutes, and allows the successful use of aliphatic aldehydes, substrates not so frequently explored with most usual catalysts for this reaction. Furthermore, the aforementioned advantages make this methodology very attractive and superior to the existing ones.
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Affiliation(s)
- Luan A Martinho
- Instituto de Química, Laboratório de Química Metodológica e Orgânica Sintética (LaQMOS), Universidade de Brasília, 70904-970, Brasília, DF, Brazil
| | - Carlos Kleber Z Andrade
- Instituto de Química, Laboratório de Química Metodológica e Orgânica Sintética (LaQMOS), Universidade de Brasília, 70904-970, Brasília, DF, Brazil
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2
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Kang JY, Huang H. Triflic Anhydride (Tf2O)-Activated Transformations of Amides, Sulfoxides and Phosphorus Oxides via Nucleophilic Trapping. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1679-8205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractTrifluoromethanesulfonic anhydride (Tf2O) is utilized as a strong electrophilic activator in a wide range of applications in synthetic organic chemistry, leading to the transient generation of a triflate intermediate. This versatile triflate intermediate undergoes nucleophilic trapping with diverse nucleophiles to yield novel compounds. In this review, we describe the features and applications of triflic anhydride in organic synthesis reported in the past decade, especially in amide, sulfoxide, and phosphorus oxide chemistry through electrophilic activation. A plausible mechanistic pathway for each important reaction is also discussed.1 Introduction2 Amide Chemistry2.1 Carbon Nucleophiles2.2 Hydrogen Nucleophiles2.3 Nitrogen Nucleophiles2.4 Oxygen and Sulfur Nucleophiles2.5 hosphorus Nucleophiles2.6 A Vilsmeier-Type Reagent2.7 Umpolung Reactivity in Amides3 Sulfoxide Chemistry3.1 Oxygen Nucleophiles3.2 Carbon Nucleophiles3.3 Nitrogen Nucleophiles3.4 Thionium Reagents4 Phosphorus Chemistry4.1 Hendrickson’s Reagent4.2 Diaryl Phosphine Oxides4.3 Phosphonates, Phosphates and Phosphinates5 Conclusion and Outlook
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Affiliation(s)
- Jun Yong Kang
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University
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3
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Jalani HB, Jeong J. p‐
Toluenesulfonic
acid Catalyzed,
Isocyanide‐Free
,
Groebke‐Blackburn‐Bienayme
(
GBB
) Type Multicomponent Synthesis of
3‐Anilino
‐imdazo[1,2‐a]pyridines. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4456] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hitesh B. Jalani
- College of Pharmacy Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak‐ro, Yeonsu‐gu Incheon South Korea
- Smart BioPharm, 310‐Pilotplant, Incheon Techno‐Park, 12‐Gaetbeol‐ro, Yeonsu‐gu Incheon South Korea
| | - Jin‐Hyun Jeong
- College of Pharmacy Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak‐ro, Yeonsu‐gu Incheon South Korea
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4
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Panda J, Raiguru BP, Mishra M, Mohapatra S, Nayak S. Recent Advances in the Synthesis of Imidazo[1,2‐
a
]pyridines: A Brief Review. ChemistrySelect 2022. [DOI: 10.1002/slct.202103987] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jasmine Panda
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Bishnu P. Raiguru
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Mitali Mishra
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Seetaram Mohapatra
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Sabita Nayak
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
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5
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Heindl S, Riomet M, Matyasovsky J, Lemmerer M, Malzer N, Maulide N. Chemoselektive γ-Oxidation von β,γ-ungesättigten Amiden mit TEMPO. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 133:19271-19275. [PMID: 38505148 PMCID: PMC10946935 DOI: 10.1002/ange.202104023] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 06/02/2021] [Indexed: 02/05/2023]
Abstract
AbstractEin chemoselektives und robustes Protokoll zur γ‐Oxidation von β,γ‐ungesättigten Amiden wird dargelegt. Bei dieser Methode ermöglicht elektrophile Amidaktivierung eine bei ungesättigten Amiden bisher selten angewendete regioselektive Reaktion mit TEMPO, die zu γ‐aminoxylierten α,β‐ungesättigten Amiden führt. Radikalische Zyklisierungen und Oxidationen der synthetisierten Produkte untermauern die Nützlichkeit der hergestellten Verbindungen.
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Affiliation(s)
- Sebastian Heindl
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
| | - Margaux Riomet
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
| | - Ján Matyasovsky
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
| | - Miran Lemmerer
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
| | - Nicolas Malzer
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
| | - Nuno Maulide
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
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6
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Heindl S, Riomet M, Matyasovsky J, Lemmerer M, Malzer N, Maulide N. Chemoselective γ-Oxidation of β,γ-Unsaturated Amides with TEMPO. Angew Chem Int Ed Engl 2021; 60:19123-19127. [PMID: 34146371 PMCID: PMC8456850 DOI: 10.1002/anie.202104023] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 06/02/2021] [Indexed: 12/23/2022]
Abstract
A chemoselective and robust protocol for the γ‐oxidation of β,γ‐unsaturated amides is reported. In this method, electrophilic amide activation, in a rare application to unsaturated amides, enables a regioselective reaction with TEMPO resulting in the title products. Radical cyclisation reactions and oxidation of the synthesised products highlight the synthetic utility of the products obtained.
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Affiliation(s)
- Sebastian Heindl
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Vienna, Austria
| | - Margaux Riomet
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Vienna, Austria
| | - Ján Matyasovsky
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Vienna, Austria
| | - Miran Lemmerer
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Vienna, Austria
| | - Nicolas Malzer
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Vienna, Austria
| | - Nuno Maulide
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Vienna, Austria
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7
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Vuillermet F, Bourret J, Pelletier G. Synthesis of Imidazo[1,2-a]pyridines: Triflic Anhydride-Mediated Annulation of 2H-Azirines with 2-Chloropyridines. J Org Chem 2020; 86:388-402. [DOI: 10.1021/acs.joc.0c02148] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Frédéric Vuillermet
- Department of Chemical Sciences, Paraza Pharma Inc., 2525 avenue Marie-Curie, Saint-Laurent, Québec H4S 2E1, Canada
| | - Joanick Bourret
- Department of Chemical Sciences, Paraza Pharma Inc., 2525 avenue Marie-Curie, Saint-Laurent, Québec H4S 2E1, Canada
| | - Guillaume Pelletier
- Department of Chemical Sciences, Paraza Pharma Inc., 2525 avenue Marie-Curie, Saint-Laurent, Québec H4S 2E1, Canada
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8
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Leypold M, D’Angelo KA, Movassaghi M. Chemoselective α-Sulfidation of Amides Using Sulfoxide Reagents. Org Lett 2020; 22:8802-8807. [PMID: 33048547 PMCID: PMC7680396 DOI: 10.1021/acs.orglett.0c03160] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Indexed: 11/29/2022]
Abstract
The direct α-sulfidation of tertiary amides using sulfoxide reagents under electrophilic amide activation conditions is described. Employing convenient and readily available reagents, selective functionalization takes place to generate isolable sulfonium ions en route to α-sulfide amides. Mechanistic studies identified activated sulfoxides as promoters of the desired transformation and enabled the extension of the methodology from benzylic to aliphatic amide substrates.
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Affiliation(s)
| | | | - Mohammad Movassaghi
- Department of Chemistry, Massachusetts
Institute of Technology, Cambridge, Massachusetts 02139, United States
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9
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Veltri L, Russo P, Prestia T, Vitale P, Romeo R, Gabriele B. A multicomponent palladium-catalyzed carbonylative approach to imidazopyridinyl-N,N-dialkylacetamides. J Catal 2020. [DOI: 10.1016/j.jcat.2020.03.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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10
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Patel OPS, Jaspal S, Shinde VN, Nandwana NK, Rangan K, Kumar A. Phenyliodine(III) Diacetate-Mediated 1,2-ipso-Migration in Mannich Bases of Imidazo[1,2-a]pyridines: Preparation of N-Acetoxymethyl/Alkoxymethyl-N-arylimidazo[1,2-a]pyridine-3-amines. J Org Chem 2020; 85:7309-7321. [DOI: 10.1021/acs.joc.0c00674] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Om P. S. Patel
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Sonam Jaspal
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Vikki N. Shinde
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Nitesh K. Nandwana
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Krishnan Rangan
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad Campus, Hyderabad, Telangana 500078, India
| | - Anil Kumar
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
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11
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Hussain M, Liu J, Fu L, Hasan M. Synthesis of imidazo[1, 2‐a]pyridines via the silver acetate‐catalyzed Groebke‐Blackburn‐Bienayme reaction with ethylene glycol as a biodegradable and sustainable solvent. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3746] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Mustafa Hussain
- State key laboratory of fine chemicalDalian University of Technology Dalian People's Republic of China
| | - Jianhui Liu
- State key laboratory of fine chemicalDalian University of Technology Dalian People's Republic of China
- School of Petroleum and Chemical EngineeringDalian University of Technology, Panjin Campus Panjin Liaoning Province People's Republic of China
| | - Lu Fu
- School of Petroleum and Chemical EngineeringDalian University of Technology, Panjin Campus Panjin Liaoning Province People's Republic of China
| | - Mehdi Hasan
- Department of ChemistryUniversity of Baltistan Skardu Pakistan
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12
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Boltjes A, Dömling A. The Groebke-Blackburn-Bienaymé Reaction. EUROPEAN JOURNAL OF CHEMISTRY (PRINT) 2019; 2019:7007-7049. [PMID: 34012704 PMCID: PMC8130801 DOI: 10.1002/ejoc.201901124] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Indexed: 12/23/2022]
Abstract
Imidazo[1,2-a]pyridine is a well-known scaffold in many marketed drugs, such as Zolpidem, Minodronic acid, Miroprofen and DS-1 and it also serves as a broadly applied pharmacophore in drug discovery. The scaffold revoked a wave of interest when Groebke, Blackburn and Bienaymé reported independently a new three component reaction resulting in compounds with the imidazo[1,2-a]-heterocycles as a core structure. During the course of two decades the Groebke Blackburn Bienaymé (GBB-3CR) reaction has emerged as a very important multicomponent reaction (MCR), resulting in over a hundred patents and a great number of publications in various fields of interest. Now two compounds derived from GBB-3CR chemistry received FDA approval. To celebrate the first 20 years of GBB-chemistry, we present an overview of the chemistry of the GBB-3CR, including an analysis of each of the three starting material classes, solvents and catalysts. Additionally, a list of patents and their applications and a more in-depth summary of the biological targets that were addressed, including structural biology analysis, is given.
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Affiliation(s)
- André Boltjes
- Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen, A. Deusinglaan 1, Groningen, The Netherlands
| | - Alexander Dömling
- Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen, A. Deusinglaan 1, Groningen, The Netherlands
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13
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Wang AE, Yu CC, Chen TT, Liu YP, Huang PQ. Enamines as Surrogates of Alkene Carbanions for the Reductive Alkenylation of Secondary Amides: An Approach to Allylamines. Org Lett 2018; 20:999-1002. [PMID: 29384685 DOI: 10.1021/acs.orglett.7b03943] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A new strategy to construct allylamines through reductive alkenylation of secondary amides with enamines is reported. The method features the use of trifluoromethanesulfonic anhydride as an activation reagent of amides, and enamines as unconventional alkenylation reagents. In this manner, enamines serve as surrogates of alkene carbanions instead of the classical enolates equivalents. A possible mechanism involving a Hoffmann-like elimination of the amine-borane complex intermediate is proposed.
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Affiliation(s)
- Ai-E Wang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, and iChem (Collaborative Innovation Centre of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China.,State Key Laboratory of Applied Organic Chemistry Lanzhou University , Lanzhou 730000, P. R. China
| | - Cun-Cun Yu
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, and iChem (Collaborative Innovation Centre of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China
| | - Ting-Ting Chen
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, and iChem (Collaborative Innovation Centre of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China
| | - Yong-Peng Liu
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, and iChem (Collaborative Innovation Centre of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, and iChem (Collaborative Innovation Centre of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China
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14
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Mátravölgyi B, Hergert T, Bálint E, Bagi P, Faigl F. Access to Fluorazones by Intramolecular Dehydrative Cyclization of Aromatic Tertiary Amides: A Synthetic and Mechanistic Study. J Org Chem 2018; 83:2282-2292. [DOI: 10.1021/acs.joc.7b03176] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Béla Mátravölgyi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, H-1111 Budapest, Hungary
| | - Tamás Hergert
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, H-1111 Budapest, Hungary
| | - Erika Bálint
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, H-1111 Budapest, Hungary
| | - Péter Bagi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, H-1111 Budapest, Hungary
| | - Ferenc Faigl
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, H-1111 Budapest, Hungary
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15
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Chen H, Ye JL, Huang PQ. Chemoselective direct reductive trifluoromethylation of amides: a flexible access to functionalized α-trifluoromethylamines. Org Chem Front 2018. [DOI: 10.1039/c7qo01031a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A one-pot method is reported for the direct transformation of secondary amides to α-trifluoromethylamines.
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Affiliation(s)
- Hang Chen
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Jian-Liang Ye
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Pei-Qiang Huang
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
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16
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Huang PQ, Fan T. Intramolecular Keto Lactam Condensation: A Convenient and Straightforward Approach to Bicyclic Vinylogous Lactams. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province; iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian P. R. China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; 300071 Tianjin P. R. China
| | - Ting Fan
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province; iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; 361005 Xiamen Fujian P. R. China
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17
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Zheng JF, Hu XN, Xu Z, Cai DC, Shen TL, Huang PQ. Substrate-Controlled Chemoselective Reactions of Isocyanoacetates with Amides and Lactams. J Org Chem 2017; 82:9693-9703. [DOI: 10.1021/acs.joc.7b01768] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jian-Feng Zheng
- Department of Chemistry,
Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative
Innovation Center of Chemistry for Energy Materials), College of Chemistry
and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Xiu-Ning Hu
- Department of Chemistry,
Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative
Innovation Center of Chemistry for Energy Materials), College of Chemistry
and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Zhen Xu
- Department of Chemistry,
Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative
Innovation Center of Chemistry for Energy Materials), College of Chemistry
and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Dong-Cheng Cai
- Department of Chemistry,
Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative
Innovation Center of Chemistry for Energy Materials), College of Chemistry
and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Tai-Long Shen
- Department of Chemistry,
Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative
Innovation Center of Chemistry for Energy Materials), College of Chemistry
and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry,
Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative
Innovation Center of Chemistry for Energy Materials), College of Chemistry
and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
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18
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Trillo P, Slagbrand T, Tinnis F, Adolfsson H. Mild Reductive Functionalization of Amides into N-Sulfonylformamidines. ChemistryOpen 2017; 6:484-487. [PMID: 28794940 PMCID: PMC5542752 DOI: 10.1002/open.201700087] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Indexed: 01/12/2023] Open
Abstract
The development of a protocol for the reductive functionalization of amides into N‐sulfonylformamidines is reported. The one‐pot procedure is based on a mild catalytic reduction of tertiary amides into the corresponding enamines by the use of Mo(CO)6 (molybdenum hexacarbonyl) and TMDS (1,1,3,3‐tetramethyldisiloxane). The formed enamines were allowed to react with sulfonyl azides to give the target compounds in moderate to good yields.
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Affiliation(s)
- Paz Trillo
- Department of Organic Chemistry Stockholm University 106 91 Stockholm Sweden
| | - Tove Slagbrand
- Department of Organic Chemistry Stockholm University 106 91 Stockholm Sweden
| | - Fredrik Tinnis
- Department of Organic Chemistry Stockholm University 106 91 Stockholm Sweden
| | - Hans Adolfsson
- Department of Organic Chemistry Stockholm University 106 91 Stockholm Sweden.,Department of Chemistry Umeå University 901 87 Umeå Sweden
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19
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Slagbrand T, Kervefors G, Tinnis F, Adolfsson H. An Efficient One-pot Procedure for the Direct Preparation of 4,5-Dihydroisoxazoles from Amides. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700154] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Tove Slagbrand
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; SE-106 91 Stockholm Sweden
| | - Gabriella Kervefors
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; SE-106 91 Stockholm Sweden
| | - Fredrik Tinnis
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; SE-106 91 Stockholm Sweden
| | - Hans Adolfsson
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; SE-106 91 Stockholm Sweden
- Department of Chemistry; Umeå University; SE-901 87 Umeå Sweden
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20
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Mondal S, Samanta S, Jana S, Hajra A. (Diacetoxy)iodobenzene-Mediated Oxidative C–H Amination of Imidazopyridines at Ambient Temperature. J Org Chem 2017; 82:4504-4510. [DOI: 10.1021/acs.joc.7b00564] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Susmita Mondal
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Sadhanendu Samanta
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Sourav Jana
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
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21
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Sahoo H, Mukherjee S, Grandhi GS, Selvakumar J, Baidya M. Copper Catalyzed C–N Cross-Coupling Reaction of Aryl Boronic Acids at Room Temperature through Chelation Assistance. J Org Chem 2017; 82:2764-2771. [DOI: 10.1021/acs.joc.7b00002] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Harekrishna Sahoo
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Sayan Mukherjee
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Gowri Sankar Grandhi
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Jayaraman Selvakumar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Mahiuddin Baidya
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
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22
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Huang PQ, Ou W. A Direct, Versatile, and Chemoselective Synthesis of Vinylogous Bis- and Monourethanes/amides and β-Keto Esters by Aza-Knoevenagel-Type Reactions of Tertiary Amides with Enolates. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601326] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province; iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P.R. China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; 300071 Tianjin P. R. China
| | - Wei Ou
- Department of Chemistry and The Key Laboratory for Chemical Biology of Fujian Province; iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); College of Chemistry and Chemical Engineering; Xiamen University; Xiamen Fujian 361005 P.R. China
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23
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Huang PQ, Huang YH, Xiao KJ. Metal-Free Intermolecular Coupling of Arenes with Secondary Amides: Chemoselective Synthesis of Aromatic Ketimines and Ketones, and N-Deacylation of Secondary Amides. J Org Chem 2016; 81:9020-9027. [PMID: 27603045 DOI: 10.1021/acs.joc.6b01647] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The direct transformation of common secondary amides into aromatic ketimines and aromatic ketones with C-C bond formation is described. The reaction can also be used for N-deacylation of secondary amides to release amines. This method consists of in situ amide activation with triflic anhydride and intermolecular capture of the resulting highly electrophilic nitrilium intermediate with an arene. The reaction is applicable to various kinds of secondary amides (electrophiles), but only electron-rich and moderately electron-rich arenes can be used as nucleophiles. Thanks to the use of bench stable arenes instead of reactive and basic organometallics as nucleophiles, the reaction proceeded with high chemoselectivity at the secondary amido group in the presence of a series of sensitive functional groups such as aldehyde, ketone, ester, cyano, nitro, and tertiary amido groups. The reaction can be viewed as a Friedel-Crafts-type reaction using secondary amides as acylating agents or as an intermolecular version of the Bischler-Napieralski reaction.
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Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, P. R. China
| | - Ying-Hong Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China
| | - Kai-Jiong Xiao
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, P. R. China
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