1
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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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2
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Prince, Kumar S, Lalji RSK, Gupta M, Kumar P, Kumar R, Singh BK. Sustainable C–H activation approach for palladium-catalyzed, regioselective functionalization of 1-methyl-3-phenyl quinoxaline-2(1 H)-ones in water. Org Biomol Chem 2022; 20:8944-8951. [DOI: 10.1039/d2ob01451c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An environment-friendly approach for regioselective acylation of 1-methyl-3-phenyl quinoxaline-2(1H)-ones was developed using water as a solvent. The protocol exhibits a wide substrate scope and employs commercially available, non-toxic acyl surrogates.
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Affiliation(s)
- Prince
- Bio-organic Research Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India
- Department of Chemistry, Nanak Chand Anglo Sanskrit College, Meerut, Uttar Pradesh-250001, India
| | - Sandeep Kumar
- Bio-organic Research Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India
| | - Ram Sunil Kumar Lalji
- Bio-organic Research Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India
- Department of Chemistry, Kirori-Mal College, Delhi University, Delhi-110007, India
| | - Mohit Gupta
- Bio-organic Research Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India
- Department of Chemistry, L.N.M.S. College, Birpur, Supaul, Bihar-854340, India
| | - Prashant Kumar
- Bio-organic Research Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India
- Department of Chemistry, SRM University, Delhi-NCR Sonepat, Haryana-131029, India
| | - Ravindra Kumar
- CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh-226031, India
| | - Brajendra K. Singh
- Bio-organic Research Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India
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3
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Palani V, Perea MA, Sarpong R. Site-Selective Cross-Coupling of Polyhalogenated Arenes and Heteroarenes with Identical Halogen Groups. Chem Rev 2021; 122:10126-10169. [PMID: 34402611 DOI: 10.1021/acs.chemrev.1c00513] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Methods to functionalize arenes and heteroarenes in a site-selective manner are highly sought after for rapidly constructing value-added molecules of medicinal, agrochemical, and materials interest. One effective approach is the site-selective cross-coupling of polyhalogenated arenes bearing multiple, but identical, halogen groups. Such cross-coupling reactions have proven to be incredibly effective for site-selective functionalization. However, they also present formidable challenges due to the inherent similarities in the reactivities of the halogen substituents. In this Review, we discuss strategies for site-selective cross-couplings of polyhalogenated arenes and heteroarenes bearing identical halogens, beginning first with an overview of the reaction types that are more traditional in nature, such as electronically, sterically, and directing-group-controlled processes. Following these examples is a description of emerging strategies, which includes ligand- and additive/solvent-controlled reactions as well as photochemically initiated processes.
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Affiliation(s)
- Vignesh Palani
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Melecio A Perea
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
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4
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Lozano C, Ramirez C, Sin N, Viart HF, Prusiner SB, Paras NA, Conrad J. Silver Benzoate Facilitates the Copper-Catalyzed C-N Coupling of Iodoazoles with Aromatic Nitrogen Heterocycles. ACS OMEGA 2021; 6:9804-9812. [PMID: 33869960 PMCID: PMC8047741 DOI: 10.1021/acsomega.1c00458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 02/25/2021] [Indexed: 06/12/2023]
Abstract
In the literature, C-N coupling methods for the reaction of iodo-oxazole with 2-pyridinone were found to be low yielding. C-N coupling using silver benzoate additives with CuI catalysts and 4,7-dimethoxy-1,10-phenanthroline ligands has been developed to afford synthetically useful yields of the desired heterobicycle product. The reaction conditions are applied to the coupling of a range of iodo-heterocycles with 2-pyridinone. The coupling of a variety of NH-containing heterocycles with 4-iodo-oxazole is also demonstrated. The use of 2-, 4-, or 5-iodo-oxazole allows for the coupling of pyridinone to each oxazole position.
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Affiliation(s)
- Cedric Lozano
- Institute
for Neurodegenerative Diseases, Weill Institute for Neurosciences, University of California San Francisco, San Francisco, California 94158, United States
| | - Cristian Ramirez
- Institute
for Neurodegenerative Diseases, Weill Institute for Neurosciences, University of California San Francisco, San Francisco, California 94158, United States
| | - Ny Sin
- Institute
for Neurodegenerative Diseases, Weill Institute for Neurosciences, University of California San Francisco, San Francisco, California 94158, United States
- Department
of Neurology, Weill Institute for Neurosciences, University of California San Francisco, San Francisco 94158, California, United States
| | - Hélène
M.-F. Viart
- Institute
for Neurodegenerative Diseases, Weill Institute for Neurosciences, University of California San Francisco, San Francisco, California 94158, United States
- Department
of Neurology, Weill Institute for Neurosciences, University of California San Francisco, San Francisco 94158, California, United States
| | - Stanley B. Prusiner
- Institute
for Neurodegenerative Diseases, Weill Institute for Neurosciences, University of California San Francisco, San Francisco, California 94158, United States
- Department
of Neurology, Weill Institute for Neurosciences, University of California San Francisco, San Francisco 94158, California, United States
- Department
of Biochemistry and Biophysics, University
of California San Francisco, San
Francisco, California 94158, United States
| | - Nick A. Paras
- Institute
for Neurodegenerative Diseases, Weill Institute for Neurosciences, University of California San Francisco, San Francisco, California 94158, United States
- Department
of Neurology, Weill Institute for Neurosciences, University of California San Francisco, San Francisco 94158, California, United States
| | - Jay Conrad
- Institute
for Neurodegenerative Diseases, Weill Institute for Neurosciences, University of California San Francisco, San Francisco, California 94158, United States
- Department
of Neurology, Weill Institute for Neurosciences, University of California San Francisco, San Francisco 94158, California, United States
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5
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Piou T, Slutskyy Y, Kevin NJ, Sun Z, Xiao D, Kong J. Direct Arylation of Azoles Enabled by Pd/Cu Dual Catalysis. Org Lett 2021; 23:1996-2001. [PMID: 33667104 DOI: 10.1021/acs.orglett.1c00100] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A practical approach toward the synthesis of 2-arylazoles via direct arylation is described. The transformation relies on a Pd/Cu cocatalyst system that operates with low catalyst loadings. The reaction conditions were found to be tolerant of a wide range of functional groups and nitrogen-containing heterocycles commonly employed in a drug discovery setting.
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Affiliation(s)
- Tiffany Piou
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Yuriy Slutskyy
- Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Nancy J Kevin
- Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Zhongxiang Sun
- Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Dong Xiao
- Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Jongrock Kong
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
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6
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Jacolot M, Popowycz F, da Rosa R, Grand L, Schenkel EP, Sibelle Campos Bernardes L. The Use of 5-Hydroxymethylfurfural towards Fine Chemicals: Synthesis and Direct Arylation of 5-HMF-Based Oxazoles. Synlett 2020. [DOI: 10.1055/a-1335-7330] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Abstract5-Hydroxymethylfurfural (5-HMF) is a renewable platform chemical used as a source for obtaining diverse fine chemicals. In this letter, we report the synthesis of 5-HMF-based oxazole compounds. While 5-HMF could be easily converted into the oxazole derivative through the Van Leusen reaction, the direct arylation step needed to access the final compounds was problematic at first. After optimization, a palladium-catalyzed procedure has been developed and used for the synthesis of a series of 33 derivatives. This article reports an extension of the late-stage CH arylation reaction as an application to the oxazole platform derived from biosourced 5-HMF. The challenges in the preparation of the derivatives containing some electron-withdrawing substituents were overcome by the use of a palladium-free method.
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Affiliation(s)
- Maïwenn Jacolot
- Université de Lyon, INSA Lyon, Université Lyon 1, CNRS, CPE Lyon, UMR 5246, ICBMS
| | - Florence Popowycz
- Université de Lyon, INSA Lyon, Université Lyon 1, CNRS, CPE Lyon, UMR 5246, ICBMS
| | - Rafael da Rosa
- Université de Lyon, INSA Lyon, Université Lyon 1, CNRS, CPE Lyon, UMR 5246, ICBMS
- Laboratório de Química Farmacêutica Medicinal, Programa de Pós-Graduação em Farmácia, CCS, Universidade Federal de Santa Catarina
| | - Lucie Grand
- Université de Lyon, INSA Lyon, Université Lyon 1, CNRS, CPE Lyon, UMR 5246, ICBMS
| | - Eloir P. Schenkel
- Laboratório de Química Farmacêutica Medicinal, Programa de Pós-Graduação em Farmácia, CCS, Universidade Federal de Santa Catarina
| | - Lílian Sibelle Campos Bernardes
- Laboratório de Química Farmacêutica Medicinal, Programa de Pós-Graduação em Farmácia, CCS, Universidade Federal de Santa Catarina
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7
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Gokanapalli A, Motakatla VKR, Peddiahgari VGR. Benzimidazole bearing Pd–PEPPSI complexes catalyzed direct C2‐arylation/heteroarylation of
N
‐substituted benzimidazoles. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5869] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Anusha Gokanapalli
- Department of Chemistry Yogi Vemana University Kadapa‐516005 Andhra Pradesh India
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8
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Gambouz K, El Abbouchi A, Nassiri S, Suzenet F, Bousmina M, Akssira M, Guillaumet G, El Kazzouli S. "On Water" Palladium Catalyzed Direct Arylation of 1 H-Indazole and 1 H-7-Azaindazole. Molecules 2020; 25:molecules25122820. [PMID: 32570894 PMCID: PMC7356112 DOI: 10.3390/molecules25122820] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/14/2020] [Accepted: 06/16/2020] [Indexed: 11/16/2022] Open
Abstract
The C3 direct arylation of 1H-indazole and 1H-7-azaindazole has been a significant challenge due to the lack of the reactivity at this position. In this paper, we describe a mild and an efficient synthesis of new series of C3-aryled 1H-indazoles and C3-aryled 1H-7-azaindazoles via a C3 direct arylation using water as solvent. On water, PPh3 was effective as a ligand along with a lower charge of the catalyst Pd(OAc)2 (5 mol%) at 100 °C, leading to C3-aryled 1H-indazoles or C3-aryled 1H-7-azaindazoles in moderate to good yields.
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Affiliation(s)
- Khadija Gambouz
- Faculty of Sciences and Technologies Mohammedia, University Hassan 2, URAC 22 FSTM University Hassan II—Casablanca, BP 146, Mohammedia 28800, Morocco; (K.G.); (M.A.)
- Institut de Chimie Organique et Analytique, University of Orléans, UMR CNRS 7311, BP 6759, CEDEX 2, 54067 Orléans, France; (A.E.A.); (S.N.); (F.S.)
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
| | - Abdelmoula El Abbouchi
- Institut de Chimie Organique et Analytique, University of Orléans, UMR CNRS 7311, BP 6759, CEDEX 2, 54067 Orléans, France; (A.E.A.); (S.N.); (F.S.)
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
| | - Sarah Nassiri
- Institut de Chimie Organique et Analytique, University of Orléans, UMR CNRS 7311, BP 6759, CEDEX 2, 54067 Orléans, France; (A.E.A.); (S.N.); (F.S.)
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
| | - Franck Suzenet
- Institut de Chimie Organique et Analytique, University of Orléans, UMR CNRS 7311, BP 6759, CEDEX 2, 54067 Orléans, France; (A.E.A.); (S.N.); (F.S.)
| | - Mostapha Bousmina
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
| | - Mohamed Akssira
- Faculty of Sciences and Technologies Mohammedia, University Hassan 2, URAC 22 FSTM University Hassan II—Casablanca, BP 146, Mohammedia 28800, Morocco; (K.G.); (M.A.)
| | - Gérald Guillaumet
- Institut de Chimie Organique et Analytique, University of Orléans, UMR CNRS 7311, BP 6759, CEDEX 2, 54067 Orléans, France; (A.E.A.); (S.N.); (F.S.)
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
- Correspondence: (G.G.); (S.E.K.); Tel.: +212-6612-99-565 (S.E.K.)
| | - Saïd El Kazzouli
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
- Correspondence: (G.G.); (S.E.K.); Tel.: +212-6612-99-565 (S.E.K.)
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9
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Kaloğlu M, Özdemir İ. The direct C4-arylation of 3,5-dimethylisoxazole with aryl bromides catalyzed by imidazolidin-2-ylidene based palladium-PEPPSI complexes. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119454] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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10
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Liu C, Wang Z, Wang L, Li P, Zhang Y. Palladium-catalyzed direct C2-arylation of azoles with aromatic triazenes. Org Biomol Chem 2019; 17:9209-9216. [PMID: 31595932 DOI: 10.1039/c9ob01883b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A highly efficient palladium-catalyzed arylation of azoles at the C2-position using 1-aryltriazenes as aryl reagents was developed. Azoles including oxazoles, thiazoles, imidazoles, 1,3,4-oxadiazoles, and oxazolines could react with 1-aryltriazenes smoothly to generate the corresponding products in good to excellent yields, and various substitution patterns were tolerated toward the reaction.
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Affiliation(s)
- Can Liu
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China.
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11
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Shi X, Soulé J, Doucet H. Reaction Conditions for the Regiodivergent Direct Arylations at C2‐ or C5‐Positions of Oxazoles using Phosphine‐Free Palladium Catalysts. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900641] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xinzhe Shi
- Univ Rennes, CNRS, ISCR-UMR 6226 F-35000 Rennes France
| | | | - Henri Doucet
- Univ Rennes, CNRS, ISCR-UMR 6226 F-35000 Rennes France
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12
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Guo Z, Shi L, Wang B, He G, Wang Y, Chen G. Synthesis of reversible PAD4 inhibitors via copper-catalyzed C−H arylation of benzimidazole. Sci China Chem 2019. [DOI: 10.1007/s11426-018-9409-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Cai ZJ, Liu CX, Gu Q, Zheng C, You SL. PdII
-Catalyzed Regio- and Enantioselective Oxidative C−H/C−H Cross-Coupling Reaction between Ferrocenes and Azoles. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813887] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Zhong-Jian Cai
- State Key Laboratory of Organometallic Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Chen-Xu Liu
- State Key Laboratory of Organometallic Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Qing Gu
- State Key Laboratory of Organometallic Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300072 China
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14
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Cai ZJ, Liu CX, Gu Q, Zheng C, You SL. PdII
-Catalyzed Regio- and Enantioselective Oxidative C−H/C−H Cross-Coupling Reaction between Ferrocenes and Azoles. Angew Chem Int Ed Engl 2019; 58:2149-2153. [DOI: 10.1002/anie.201813887] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Indexed: 12/18/2022]
Affiliation(s)
- Zhong-Jian Cai
- State Key Laboratory of Organometallic Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Chen-Xu Liu
- State Key Laboratory of Organometallic Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Qing Gu
- State Key Laboratory of Organometallic Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300072 China
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15
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Mao S, Li H, Shi X, Soulé J, Doucet H. Environmentally Benign Arylations of 5‐Membered Ring Heteroarenes by Pd‐Catalyzed C−H Bonds Activations. ChemCatChem 2018. [DOI: 10.1002/cctc.201801448] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Shuxin Mao
- Univ RennesCNRS, ISCR-UMR 6226 F-35000 Rennes France
| | - Haoran Li
- Univ RennesCNRS, ISCR-UMR 6226 F-35000 Rennes France
| | - Xinzhe Shi
- Univ RennesCNRS, ISCR-UMR 6226 F-35000 Rennes France
| | | | - Henri Doucet
- Univ RennesCNRS, ISCR-UMR 6226 F-35000 Rennes France
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16
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Mao S, Shi X, Soulé JF, Doucet H. Exploring Green Solvents Associated to Pd/C as Heterogeneous Catalyst for Direct Arylation of Heteroaromatics with Aryl Bromides. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800596] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shuxin Mao
- Univ Rennes; CNRS; ISCR-UMR 6226, F- 35000 Rennes France
| | - Xinzhe Shi
- Univ Rennes; CNRS; ISCR-UMR 6226, F- 35000 Rennes France
| | | | - Henri Doucet
- Univ Rennes; CNRS; ISCR-UMR 6226, F- 35000 Rennes France
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17
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Guo Z, Li M, Mou XQ, He G, Xue XS, Chen G. Radical C–H Arylation of Oxazoles with Aryl Iodides: dppf as an Electron-Transfer Mediator for Cs2CO3. Org Lett 2018; 20:1684-1687. [DOI: 10.1021/acs.orglett.8b00530] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhengwei Guo
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Man Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xue-Qing Mou
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
| | - Xiao-Song Xue
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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18
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Kitanosono T, Masuda K, Xu P, Kobayashi S. Catalytic Organic Reactions in Water toward Sustainable Society. Chem Rev 2017; 118:679-746. [PMID: 29218984 DOI: 10.1021/acs.chemrev.7b00417] [Citation(s) in RCA: 382] [Impact Index Per Article: 54.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Traditional organic synthesis relies heavily on organic solvents for a multitude of tasks, including dissolving the components and facilitating chemical reactions, because many reagents and reactive species are incompatible or immiscible with water. Given that they are used in vast quantities as compared to reactants, solvents have been the focus of environmental concerns. Along with reducing the environmental impact of organic synthesis, the use of water as a reaction medium also benefits chemical processes by simplifying operations, allowing mild reaction conditions, and sometimes delivering unforeseen reactivities and selectivities. After the "watershed" in organic synthesis revealed the importance of water, the development of water-compatible catalysts has flourished, triggering a quantum leap in water-centered organic synthesis. Given that organic compounds are typically practically insoluble in water, simple extractive workup can readily separate a water-soluble homogeneous catalyst as an aqueous solution from a product that is soluble in organic solvents. In contrast, the use of heterogeneous catalysts facilitates catalyst recycling by allowing simple centrifugation and filtration methods to be used. This Review addresses advances over the past decade in catalytic reactions using water as a reaction medium.
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Affiliation(s)
- Taku Kitanosono
- Department of Chemistry, School of Science, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Koichiro Masuda
- Department of Chemistry, School of Science, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Pengyu Xu
- Department of Chemistry, School of Science, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shu Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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19
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Kianmehr E, Fardpour M, Kharat AN. Palladium-Catalyzed Chemo- and Regioselective Oxidative Cross-Dehydrogenative Coupling of Acetanilides with Benzothiazole. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700290] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Ebrahim Kianmehr
- School of Chemistry; College of Science; University of Tehran; Tehran Iran
| | - Maryam Fardpour
- School of Chemistry; College of Science; University of Tehran; Tehran Iran
| | - Ali Nemati Kharat
- School of Chemistry; College of Science; University of Tehran; Tehran Iran
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20
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Nishikata T, Abela AR, Huang S, Lipshutz BH. Cationic Pd(II)-catalyzed C-H activation/cross-coupling reactions at room temperature: synthetic and mechanistic studies. Beilstein J Org Chem 2016; 12:1040-64. [PMID: 27340491 PMCID: PMC4902085 DOI: 10.3762/bjoc.12.99] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 04/28/2016] [Indexed: 11/23/2022] Open
Abstract
Cationic palladium(II) complexes have been found to be highly reactive towards aromatic C-H activation of arylureas at room temperature. A commercially available catalyst [Pd(MeCN)4](BF4)2 or a nitrile-free cationic palladium(II) complex generated in situ from the reaction of Pd(OAc)2 and HBF4, effectively catalyzes C-H activation/cross-coupling reactions between aryl iodides, arylboronic acids and acrylates under milder conditions than those previously reported. The nature of the directing group was found to be critical for achieving room temperature conditions, with the urea moiety the most effective in promoting facile coupling reactions at an ortho C-H position. This methodology has been utilized in a streamlined and efficient synthesis of boscalid, an agent produced on the kiloton scale annually and used to control a range of plant pathogens in broadacre and horticultural crops. Mechanistic investigations led to a proposed catalytic cycle involving three steps: (1) C-H activation to generate a cationic palladacycle; (2) reaction of the cationic palladacycle with an aryl iodide, arylboronic acid or acrylate, and (3) regeneration of the active cationic palladium catalyst. The reaction between a cationic palladium(II) complex and arylurea allowed the formation and isolation of the corresponding palladacycle intermediate, characterized by X-ray analysis. Roles of various additives in the stepwise process have also been studied.
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Affiliation(s)
- Takashi Nishikata
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA 93106, USA
| | - Alexander R Abela
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA 93106, USA
| | - Shenlin Huang
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA 93106, USA
| | - Bruce H Lipshutz
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA 93106, USA
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21
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Hu F, Yang J, Xia Y, Ma C, Xia H, Zhang Y, Wang J. C–H Bond Functionalization of Benzoxazoles with Chromium(0) Fischer Carbene Complexes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fangdong Hu
- Beijing
National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory
of Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, China
- School
of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Jinghui Yang
- Beijing
National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory
of Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, China
| | - Ying Xia
- Beijing
National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory
of Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, China
| | - Chen Ma
- School
of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Haiping Xia
- College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yan Zhang
- Beijing
National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory
of Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, China
| | - Jianbo Wang
- Beijing
National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory
of Bioorganic Chemistry and Molecular Engineering of Ministry of Education,
College of Chemistry, Peking University, Beijing 100871, China
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22
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Luo F, Yang J, Li Z, Xiang H, Zhou X. Palladium-Catalyzed C-H Bond Acylation of Acetanilides with Benzylic Alcohols under Aqueous Conditions. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500016] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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23
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Zhao X, Ding F, Li J, Lu K, Lu X, Wang B, Yu P. Direct C–H iodination of 1,3-azoles catalysed by CuBr 2. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.12.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Bellina F. Recent Developments in Pd-Catalyzed Direct Arylations of Heteroarenes with Aryl Halides. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_121] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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25
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Bensaid S, Doucet H. Influence of the solvent and of the reaction concentration for palladium-catalysed direct arylation of heteroaromatics with 4-bromoacetophenone. CR CHIM 2014. [DOI: 10.1016/j.crci.2014.02.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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26
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Romero-Estudillo I, Batchu VR, Boto A. One-Pot Conversion of Amino Acids into 2,5-Disubstituted Oxazoles: No Metals Needed. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400496] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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Dannenberg CA, Bizet V, Zou LH, Bolm C. Transition-Metal-Free Oxidative Iodination of 1,3,4-Oxadiazoles. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403352] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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28
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Gao F, Kim BS, Walsh PJ. Room-temperature palladium-catalyzed direct 2-arylation of benzoxazoles with aryl and heteroaryl bromides. Chem Commun (Camb) 2014; 50:10661-4. [PMID: 25078988 DOI: 10.1039/c4cc05307a] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
An efficient room-temperature palladium-catalyzed direct 2-arylation of benzoxazoles with aryl bromides is presented. The Pd(OAc)2/NiXantphos-based catalyst enables the introduction of various aryl and heteroaryl groups, via a deprotonative cross-coupling process (DCCP) in good to excellent yields (60-99%).
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Affiliation(s)
- Feng Gao
- Department of Medicinal Plants, Agronomy College, Sichuan Agricultural University, No. 211, Huimin Road, Wenjiang Region, Chengdu 611130, P. R. China
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29
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Bailey JL, Sudini RR. Synthesis of 2,4- and 2,4,5-substituted oxazoles via a silver triflate mediated cyclization. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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30
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Shen XB, Zhang Y, Chen WX, Xiao ZK, Hu TT, Shao LX. Direct C–H Bond Arylation of (Benzo)oxazoles with Aryl Chlorides Catalyzed by N-Heterocyclic Carbene–Palladium(II)–1-Methylimidazole Complex. Org Lett 2014; 16:1984-7. [DOI: 10.1021/ol500531m] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xiao-Bao Shen
- College
of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
| | - Yun Zhang
- College
of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
| | - Wen-Xin Chen
- College
of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
| | - Zheng-Kang Xiao
- College
of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
| | - Ting-Ting Hu
- Oujiang
College, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
| | - Li-Xiong Shao
- College
of Chemistry and Materials Engineering, Wenzhou University, Chashan University Town, Wenzhou, Zhejiang Province 325035, People’s Republic of China
- College
of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang Province 321004, People’s Republic of China
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31
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Liu D, Yu J, Cheng J. Copper-catalyzed oxidative cyclization of chalcone and benzylic amine leading to 2,5-diaryl oxazoles via carbon–carbon double bond cleavage. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.12.077] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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32
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Bonin H, Sauthier M, Felpin FX. Transition Metal-Mediated Direct CH Arylation of Heteroarenes Involving Aryl Radicals. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300865] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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33
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Arroniz C, Denis JG, Ironmonger A, Rassias G, Larrosa I. An organic cation as a silver(i) analogue for the arylation of sp2 and sp3 C–H bonds with iodoarenes. Chem Sci 2014. [DOI: 10.1039/c4sc01215a] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A general, cost-effective and sustainable replacement for silver in palladium catalysed direct arylations of C(sp2)–H and C(sp3)–H bonds.
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Affiliation(s)
- Carlos Arroniz
- School of Biological and Chemical Sciences
- Queen Mary University of London
- London, UK
- GlaxoSmithKline Medicines Research Centre
- Stevenage, UK
| | - J. Gabriel Denis
- School of Biological and Chemical Sciences
- Queen Mary University of London
- London, UK
| | | | | | - Igor Larrosa
- School of Biological and Chemical Sciences
- Queen Mary University of London
- London, UK
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34
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Alzieu T, Lehmann J, Naidu AB, Martin RE, Britton R. Converting oxazoles into imidazoles: new opportunities for diversity-oriented synthesis. Chem Commun (Camb) 2014; 50:1867-70. [DOI: 10.1039/c3cc48467j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We report the optimization of a neglected reaction for the rapid and direct conversion of oxazoles into N-substituted imidazoles.
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Affiliation(s)
- Thibaut Alzieu
- Medicinal Chemistry
- Small Molecule Research
- Pharma Research & Early Development (pRED)
- F. Hoffmann-La Roche AG
- 4070 Basel, Switzerland
| | - Johannes Lehmann
- Medicinal Chemistry
- Small Molecule Research
- Pharma Research & Early Development (pRED)
- F. Hoffmann-La Roche AG
- 4070 Basel, Switzerland
| | - Ajay B. Naidu
- Department of Chemistry
- Simon Fraser University
- Burnaby, Canada
| | - Rainer E. Martin
- Medicinal Chemistry
- Small Molecule Research
- Pharma Research & Early Development (pRED)
- F. Hoffmann-La Roche AG
- 4070 Basel, Switzerland
| | - Robert Britton
- Department of Chemistry
- Simon Fraser University
- Burnaby, Canada
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35
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Naresh G, Narender T. Molecular iodine mediated synthesis of polysubstituted oxazoles by oxidative domino cyclization in water. RSC Adv 2014. [DOI: 10.1039/c4ra00501e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple and efficient iodine-mediated domino protocol has been developed to construct polysubstituted oxazoles through the C-heteroatom bond formation in water from readily available β-ketoesters and primary amines in high yields.
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Affiliation(s)
- Gunaganti Naresh
- CSIR-Central Drug Research Institute
- Medicinal and Process Chemistry Division
- , India
| | - Tadigoppula Narender
- CSIR-Central Drug Research Institute
- Medicinal and Process Chemistry Division
- , India
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36
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Islam S, Larrosa I. "On water", phosphine-free palladium-catalyzed room temperature C-H arylation of indoles. Chemistry 2013; 19:15093-6. [PMID: 24123582 DOI: 10.1002/chem.201302838] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Indexed: 01/02/2023]
Affiliation(s)
- Saidul Islam
- School of Biological and Chemical Sciences, Queen Mary University of London, Joseph Priestley Building, Mile End Road, London, E1 4NS (UK)
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37
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Wu Z, Chen S, Hu C, Li Z, Xiang H, Zhou X. Palladium-Catalyzed CHorthoArylation of Benzoic Acids with Diaryliodonium Salts in Water. ChemCatChem 2013. [DOI: 10.1002/cctc.201300470] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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38
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Xue WJ, Zhang W, Zheng KL, Dai Y, Guo YQ, Li HZ, Gao FF, Wu AX. Formation of 2-Acyloxazoles by a Multipathway Coupled Domino Strategy: One-Pot Metal-Free Oxidative Cyclization Applicable to Various Substrates. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201300124] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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40
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Orr D, Tolfrey A, Percy JM, Frieman J, Harrison ZA, Campbell-Crawford M, Patel VK. Single-Step Microwave-Mediated Synthesis of Oxazoles and Thiazoles from 3-Oxetanone: A Synthetic and Computational Study. Chemistry 2013; 19:9655-62. [DOI: 10.1002/chem.201301011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Indexed: 11/07/2022]
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41
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Yugandar S, Acharya A, Ila H. Synthesis of 2,5-Bis(hetero)aryl 4′-Substituted 4,5′-Bisoxazoles via Copper(I)-Catalyzed Domino Reactions of Activated Methylene Isocyanides with 2-Phenyl- and 2-(2-Thienyl)-4-[(aryl/heteroaryl)(methylthio)methylene]oxazol-5(4H)-ones. J Org Chem 2013; 78:3948-60. [DOI: 10.1021/jo400317g] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Somaraju Yugandar
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur,
Bangalore-50064, India
| | - Anand Acharya
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur,
Bangalore-50064, India
| | - Hiriyakkanavar Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur,
Bangalore-50064, India
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42
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Eftekhari-Sis B, Zirak M, Akbari A. Arylglyoxals in Synthesis of Heterocyclic Compounds. Chem Rev 2013; 113:2958-3043. [DOI: 10.1021/cr300176g] [Citation(s) in RCA: 228] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Bagher Eftekhari-Sis
- Department of Chemistry, Faculty
of Science, University of Maragheh, Golshahr,
P.O. Box. 55181-83111, Maragheh, Iran
| | - Maryam Zirak
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran,
Iran
| | - Ali Akbari
- Department of Chemistry, Faculty
of Science, University of Maragheh, Golshahr,
P.O. Box. 55181-83111, Maragheh, Iran
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43
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Wu Z, Luo F, Chen S, Li Z, Xiang H, Zhou X. Palladium-catalyzed para-selective arylation of phenols with aryl iodides in water. Chem Commun (Camb) 2013; 49:7653-5. [DOI: 10.1039/c3cc44345k] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Li B, Dixneuf PH. sp2 C–H bond activation in water and catalytic cross-coupling reactions. Chem Soc Rev 2013; 42:5744-67. [DOI: 10.1039/c3cs60020c] [Citation(s) in RCA: 471] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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45
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Metal-free dual sp3 C–H functionalization: I2-promoted domino oxidative cyclization to construct 2,5-disubstituted oxazoles. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.10.072] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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46
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Shah SR, Navathe SS, Dikundwar AG, Guru Row TN, Vasella AT. Thermal Rearrangement of Azido Ketones into Oxazoles via Azirines: One-Pot, Metal-Free Heteroannulation to Functionalized 1,3-Oxazoles. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201269] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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47
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Vijay Kumar S, Saraiah B, Misra NC, Ila H. Synthesis of 2-Phenyl-4,5-Substituted Oxazoles by Copper-Catalyzed Intramolecular Cyclization of Functionalized Enamides. J Org Chem 2012; 77:10752-63. [DOI: 10.1021/jo3021192] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- S. Vijay Kumar
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur,
Bangalore-560064, Karnataka, India
| | - B. Saraiah
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur,
Bangalore-560064, Karnataka, India
| | - N. C. Misra
- Department of Chemistry, Indian Institute of Technology, Kanpur-208016, Uttar
Pradesh, India
| | - H. Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur,
Bangalore-560064, Karnataka, India
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48
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Cheung CW, Buchwald SL. Room temperature copper(II)-catalyzed oxidative cyclization of enamides to 2,5-disubstituted oxazoles via vinylic C-H functionalization. J Org Chem 2012; 77:7526-37. [PMID: 22838632 PMCID: PMC3454444 DOI: 10.1021/jo301332s] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A copper(II)-catalyzed oxidative cyclization of enamides to oxazoles via vinylic C-H bond functionalization at room temperature is described. Various 2,5-disubstituted oxazoles bearing aryl, vinyl, alkyl, and heteroaryl substituents could be synthesized in moderate to high yields. This reaction protocol is complementary to our previously reported iodine-mediated cyclization of enamides to afford 2,4,5-trisubstituted oxazoles.
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Affiliation(s)
- Chi Wai Cheung
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
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49
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Bensaid S, Doucet H. Solvent-free palladium-catalyzed direct arylation of heteroaromatics with aryl bromides. CHEMSUSCHEM 2012; 5:1559-1567. [PMID: 22833399 DOI: 10.1002/cssc.201100771] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 01/05/2012] [Indexed: 06/01/2023]
Abstract
Solvent is one of the major sources of waste in the course of catalyzed direct arylations. Some palladium-catalyzed direct arylations of heteroaromatics can be advantageously performed without any solvent. In the presence of palladium catalysts (1 mol %) and potassium acetate as the base, the direct 5-arylation of some thiazoles, thiophenes, furans, or pyrroles with aryl bromides as coupling partners proceeds highly regioselectively and in moderate to high yields. However, the use of these solvent-free conditions is limited to electron-deficient aryl bromides.
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Affiliation(s)
- Souhila Bensaid
- Institut Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Catalyse et Organometalliques, Campus de Beaulieu, 35042 Rennes, France
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50
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