1
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Singh PR, Lamba M, Goswami A. Copper-Catalyzed Chemoselective O-Arylation of Oxindoles: Access to Cyclic Aryl Carboxyimidates. J Org Chem 2024; 89:2926-2938. [PMID: 38354326 DOI: 10.1021/acs.joc.3c02341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
We have developed a highly efficient base- and additive-free chemoselective CuO-catalyzed strategy for the O-arylation of 2-oxindoles to synthesize 2-phenoxy-3H-indole and 2-phenoxy-1H-indole derivatives in the presence of diaryl iodonium salts. This method offers a variety of O-arylated oxindoles in good to excellent yields under relatively milder reaction conditions. Furthermore, this methodology was extended for the O-arylation of 2-pyridinone and isoindoline-1-one derivatives as well.
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Affiliation(s)
- Prasoon Raj Singh
- Department of Chemistry, SS Bhatnagar Block, Indian Institute of Technology, Ropar 140001, Punjab, India
| | - Manisha Lamba
- Department of Chemistry, SS Bhatnagar Block, Indian Institute of Technology, Ropar 140001, Punjab, India
| | - Avijit Goswami
- Department of Chemistry, SS Bhatnagar Block, Indian Institute of Technology, Ropar 140001, Punjab, India
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2
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Vijayan A, Rao DN, Radhakrishnan KV, Lam PYS, Das P. Advances in Carbon–Element Bond Construction under Chan–Lam Cross-Coupling Conditions: A Second Decade. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1705971] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
AbstractCopper-mediated carbon–heteroatom bond-forming reactions involving a wide range of substrates have been in the spotlight for many organic chemists. This review highlights developments between 2010 and 2019 in both stoichiometric and catalytic copper-mediated reactions, and also examples of nickel-mediated reactions, under modified Chan–Lam cross-coupling conditions using various nucleophiles; examples include chemo- and regioselective N-arylations or O-arylations. The utilization of various nucleophiles as coupling partners together with reaction optimization (including the choice of copper source, ligands, base, and other additives), limitations, scope, and mechanisms are examined; these have benefitted the development of efficient and milder methods. The synthesis of medicinally valuable or pharmaceutically important nitrogen heterocycles, including isotope-labeled compounds, is also included. Chan–Lam coupling reaction can now form twelve different C–element bonds, making it one of the most diverse and mild reactions known in organic chemistry.1 Introduction2 Construction of C–N and C–O Bonds2.1 C–N Bond Formation2.1.1 Original Discovery via Stoichiometric Copper-Mediated C–N Bond Formation2.1.2 Copper-Catalyzed C–N Bond Formation2.1.3 Coupling with Azides, Sulfoximines, and Sulfonediimines as Nitrogen Nucleophiles2.1.4 Coupling with N,N-Dialkylhydroxylamines2.1.5 Enolate Coupling with sp3-Carbon Nucleophiles2.1.6 Nickel-Catalyzed Chan–Lam Coupling2.1.7 Coupling with Amino Acids2.1.8 Coupling with Alkylboron Reagents2.1.9 Coupling with Electron-Deficient Heteroarylamines2.1.10 Selective C–N Bond Formation for the Synthesis of Heterocycle-Containing Compounds2.1.11 Using Sulfonato-imino Copper(II) Complexes2.2 C–O Bond Formation2.2.1 Coupling with (Hetero)arylboron Reagents2.2.2 Coupling with Alkyl- and Alkenylboron Reagents3 C–Element (Element = S, P, C, F, Cl, Br, I, Se, Te, At) Bond Forma tion under Modified Chan–Lam Conditions4 Conclusions
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Affiliation(s)
- Ajesh Vijayan
- Department of Chemistry, CHRIST (Deemed to be University)
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3
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Lim T, Ryoo JY, Han MS. Transition-Metal-Free Borylation of Aryl Bromide Using a Simple Diboron Source. J Org Chem 2020; 85:10966-10972. [PMID: 32806093 DOI: 10.1021/acs.joc.0c01065] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In this study, we developed a simple transition-metal-free borylation reaction of aryl bromides. Bis-boronic acid (BBA), was used, and the borylation reaction was performed using a simple procedure at a mild temperature. Under mild conditions, aryl bromides were converted to arylboronic acids directly without any deprotection steps and purified by conversion to trifluoroborate salts. The functional group tolerance was considerably high. The mechanism study suggested that this borylation reaction proceeds via a radical pathway.
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Affiliation(s)
- Taeho Lim
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Jeong Yup Ryoo
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Min Su Han
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
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4
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Affiliation(s)
- Jin‐Quan Chen
- School of Chemistry and Environmental EngineeringWuhan Institute of Technology Wuhan 430205 People's Republic of China
| | - Jing‐Hang Li
- School of Chemistry and Environmental EngineeringWuhan Institute of Technology Wuhan 430205 People's Republic of China
| | - Zhi‐Bing Dong
- School of Chemistry and Environmental EngineeringWuhan Institute of Technology Wuhan 430205 People's Republic of China
- Key Laboratory of Green Chemical ProcessMinistry of EducationWuhan Institute of Technology Wuhan 430205 People's Republic of China
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional MoleculesHubei University Wuhan 430062 People's Republic of China
- Hubei key Laboratory of Novel Reactor and Green Chemistry TechnologyWuhan Institute of Technology Wuhan 430205 People's Republic of China
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5
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Reeta, Rangarajan TM, Singh RP, Singh RP, Singh M. An Easy Access to Oxime Ethers by
Pd‐Catalyzed
C—O
Cross‐Coupling
of Activated Aryl Bromides with Ketoximes and Chalcone Oximes. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.201900540] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Reeta
- Centre for Fire, Explosive and Environment Safety, DRDO Delhi India
- Department of ChemistryUniversity of Delhi Delhi India
| | - T. M. Rangarajan
- Department of ChemistrySri Venkateswara College, University of Delhi New Delhi India
| | - Raj Pal Singh
- Centre for Fire, Explosive and Environment Safety, DRDO Delhi India
| | - R. P. Singh
- Department of ChemistrySri Venkateswara College, University of Delhi New Delhi India
| | - Manjula Singh
- Department of ChemistryShivaji College, University of Delhi New Delhi India
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6
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Sarmah M, Dewan A, Boruah PK, Das MR, Bora U. Intercalation of copper salt to montmorillonite K‐10 and its application as a reusable catalyst for Chan–Lam cross‐coupling reaction. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5554] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Manashi Sarmah
- Department of Chemical SciencesTezpur University Tezpur 784028 Assam India
| | - Anindita Dewan
- Department of Chemical SciencesTezpur University Tezpur 784028 Assam India
| | - Purna K. Boruah
- Advanced Materials Group, Materials Sciences and Technology DivisionCSIR‐North East Institute of Science and Technology Jorhat 785006 Assam India
| | - Manash R. Das
- Advanced Materials Group, Materials Sciences and Technology DivisionCSIR‐North East Institute of Science and Technology Jorhat 785006 Assam India
| | - Utpal Bora
- Department of Chemical SciencesTezpur University Tezpur 784028 Assam India
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7
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Reeta R, Rangarajan TM, Kaushik K, Singh RP, Singh M, Singh RP. Efficient solvent- and temperature-tuned access to aldoxime ethers and phenolic functions by Pd-catalyzed C–O cross-coupling of aldoximes with aryl bromides and bromo-chalcones. NEW J CHEM 2020. [DOI: 10.1039/c9nj05124d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A single method with a functionality switching option, to access oxime ethers and phenols, was developed for the first time for the Pd-catalyzed C–O cross-coupling of aryl bromides and bromo-chalcones with aldoximes.
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Affiliation(s)
- Reeta Reeta
- Centre for Fire, Explosive and Environment Safety
- DRDO
- Delhi
- India
- Department of Chemistry
| | - T. M. Rangarajan
- Department of Chemistry
- Sri Venkateswara College
- University of Delhi
- New Delhi
- India
| | - Kumar Kaushik
- Centre for Fire, Explosive and Environment Safety
- DRDO
- Delhi
- India
| | - Rishi Pal Singh
- Department of Chemistry
- Sri Venkateswara College
- University of Delhi
- New Delhi
- India
| | - Manjula Singh
- Department of Chemistry, Shivaji College, University of Delhi
- New Delhi
- India
| | - Raj Pal Singh
- Centre for Fire, Explosive and Environment Safety
- DRDO
- Delhi
- India
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8
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Mittal A, Kumari S, Parmanand, Yadav D, Sharma SK. A new copper complex on graphene oxide: A heterogeneous catalyst for
N
‐arylation and C‐H activation. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5362] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Ayushi Mittal
- Department of ChemistryUniversity of Delhi Delhi 110007 India
| | - Shweta Kumari
- Department of ChemistryUniversity of Delhi Delhi 110007 India
| | - Parmanand
- Department of ChemistryUniversity of Delhi Delhi 110007 India
| | - Deepak Yadav
- Department of ChemistryUniversity of Delhi Delhi 110007 India
- Department of ChemistryCentral University of Haryana Mahendergarh 123031 India
| | - Sunil K. Sharma
- Department of ChemistryUniversity of Delhi Delhi 110007 India
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9
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Kosmalski T, Studzińska R, Daniszewska N, Ullrich M, Sikora A, Marszałł M, Modzelewska‐Banachiewicz B. Study of the Room-Temperature Synthesis of Oxime Ethers by using a Super Base. ChemistryOpen 2018; 7:551-557. [PMID: 30065906 PMCID: PMC6058178 DOI: 10.1002/open.201800098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Indexed: 12/19/2022] Open
Abstract
In this study, we present a convenient method for the synthesis of oxime ethers by reacting oximes with various chlorides (alkyl, functionalized alkyl, and benzyl) and with the subsequent use of a super base-pulverized potassium hydroxide in DMSO. The reactions take place at room temperature and the products are obtained in high yields. The final products were received within 2 min to 3 h. In addition, the compounds do not require chromatographic separation. The structure elucidation of the titled compounds was performed by using 1H NMR and 13C NMR spectroscopy as well as mass spectrometry. The presented method of synthesis for oxime ethers is environmentally friendly, because neither water cooling or heating of the reaction mixture/solvents (necessary for chromatographic purification) is required. The synthesis can be carried out very easily on a large scale.
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Affiliation(s)
- Tomasz Kosmalski
- Department of Organic ChemistryFaculty of Pharmacy Collegium MedicumNicolaus Copernicus UniversityJurasza 285-067BydgoszczPoland
| | - Renata Studzińska
- Department of Organic ChemistryFaculty of Pharmacy Collegium MedicumNicolaus Copernicus UniversityJurasza 285-067BydgoszczPoland
| | - Natalia Daniszewska
- Department of Organic ChemistryFaculty of Pharmacy Collegium MedicumNicolaus Copernicus UniversityJurasza 285-067BydgoszczPoland
| | - Małgorzata Ullrich
- Department of Organic ChemistryFaculty of ChemistryNicolaus Copernicus UniversityGagarina 787-100ToruńPoland
| | - Adam Sikora
- Medicinal Chemistry Department Faculty of Pharmacy, Collegium MedicumNicolaus Copernicus UniversityJurasza 285-067BydgoszczPoland
| | - Michał Marszałł
- Medicinal Chemistry Department Faculty of Pharmacy, Collegium MedicumNicolaus Copernicus UniversityJurasza 285-067BydgoszczPoland
| | - Bożena Modzelewska‐Banachiewicz
- Department of Organic ChemistryFaculty of Pharmacy Collegium MedicumNicolaus Copernicus UniversityJurasza 285-067BydgoszczPoland
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10
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Sharma H, Mahajan H, Jamwal B, Paul S. Cu@Fe3O4-TiO2-L-dopa: A novel and magnetic catalyst for the Chan-Lam cross-coupling reaction in ligand free conditions. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2018.01.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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11
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Baruah J, Gogoi K, Dewan A, Borah G, Bora U. Carbothioamide as Highly Efficient Ligand for Copper-catalyzed Room Temperature Chan-Lam Cross-Coupling Reaction. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11248] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
| | - Kongkona Gogoi
- Department of Chemistry; Dibrugarh University; Dibrugarh India
| | - Anindita Dewan
- Department of Chemical Sciences; Tezpur University; Tezpur India
| | - Geetika Borah
- Department of Chemistry; Dibrugarh University; Dibrugarh India
| | - Utpal Bora
- Department of Chemical Sciences; Tezpur University; Tezpur India
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12
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Mirjafary Z, Abdoli M, Saeidian H, Kakanejadifard A, Farnia SMF. Review of the synthesis of acyclic and cyclic oxime ethers. RSC Adv 2016. [DOI: 10.1039/c5ra25591k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Oxime ethers have attracted much attention due to their potential biological activities and wide variety of synthetic applications.
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Affiliation(s)
- Zohreh Mirjafary
- Department of Chemistry
- Tehran Science and Research Branch
- Islamic Azad University
- Tehran
- Iran
| | - Morteza Abdoli
- Department of Chemistry
- Faculty of Science
- Lorestan University
- Khorramabad
- Iran
| | - Hamid Saeidian
- Department of Science
- Payame Noor University (PNU)
- Tehran
- Iran
| | - Ali Kakanejadifard
- Department of Chemistry
- Faculty of Science
- Lorestan University
- Khorramabad
- Iran
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13
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Mondal M, Bora U. Eco-friendly Suzuki–Miyaura coupling of arylboronic acids to aromatic ketones catalyzed by the oxime-palladacycle in biosolvent 2-MeTHF. NEW J CHEM 2016. [DOI: 10.1039/c5nj02734a] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxime-palladacycle catalyzed aerobic cross-coupling reaction of arylboronic acids and acyl chlorides to yield aryl ketones was developed. The reaction proceeds efficiently in 2-MeTHF, which is derived from corncobs, sugar cane, and fulfils the 3rd, 5th and 7th principles of Green Chemistry.
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Affiliation(s)
- Manoj Mondal
- Department of Chemistry
- Dibrugarh University
- Dibrugarh 786004
- India
| | - Utpal Bora
- Department of Chemistry
- Dibrugarh University
- Dibrugarh 786004
- India
- Department of Chemical Sciences
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14
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Ma XP, Shi WM, Mo XL, Li XH, Li LG, Pan CX, Chen B, Su GF, Mo DL. Synthesis of α,β-Unsaturated N-Aryl Ketonitrones from Oximes and Diaryliodonium Salts: Observation of a Metal-Free N-Arylation Process. J Org Chem 2015; 80:10098-107. [DOI: 10.1021/acs.joc.5b01716] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Xiao-Pan Ma
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China, School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, People’s Republic of China
| | - Wei-Min Shi
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China, School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, People’s Republic of China
| | - Xue-Ling Mo
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China, School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, People’s Republic of China
| | - Xiao-Hua Li
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China, School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, People’s Republic of China
| | - Liang-Gui Li
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China, School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, People’s Republic of China
| | - Cheng-Xue Pan
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China, School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, People’s Republic of China
| | - Bo Chen
- Department
of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Gui-Fa Su
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China, School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, People’s Republic of China
| | - Dong-Liang Mo
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China, School of Chemistry & Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, People’s Republic of China
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15
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Facile synthesis of trifluoroethyl aryl ethers through copper-catalyzed coupling of CF3CH2OH with aryl- and heteroaryl boronic acids. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.06.066] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Anuradha, Kumari S, Pathak DD. Synthesis and development of Chitosan anchored copper(II) Schiff base complexes as heterogeneous catalysts for N-arylation of amines. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.049] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Simple aminobenzoic acid promoted palladium catalyzed room temperature Suzuki–Miyaura cross-coupling reaction in aqueous media. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Biosilica as an efficient heterogeneous catalyst for ipso-hydroxylation of arylboronic acids. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.02.039] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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Zeng H, Dong Z, Chen X, Shao X, Xu X, Li Z. A new strategy for the synthesis of dioxime ether derivatives with nitromethylene imidazolidine. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.02.041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Jeon M, Gupta S, Im YW, Rhee YH, Park J. Fast and Complete Transimination of NH Imines intoO-Alkyl Oximes. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201402293] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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21
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Begum T, Gogoi A, Gogoi PK, Bora U. Catalysis by mont K-10 supported silver nanoparticles: a rapid and green protocol for the efficient ipso-hydroxylation of arylboronic acids. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.018] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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22
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Mulla SA, Chavan SS, Inamdar SM, Pathan MY, Shaikh TM. An efficient synthesis of O-aryloxime ethers by copper fluorapatite catalyzed cross-coupling of aryloximes with arylboronic acids. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.07.056] [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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23
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Gao H, Xu QL, Keene C, Kürti L. Scalable, transition-metal-free direct oxime O-arylation: rapid access to O-arylhydroxylamines and substituted benzo[b]furans. Chemistry 2014; 20:8883-7. [PMID: 24953184 DOI: 10.1002/chem.201403519] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Indexed: 11/08/2022]
Abstract
O-aryloximes, generated from readily available and inexpensive oximes through transition-metal-free O-arylation, can either be hydrolyzed to O-arylhydroxylamines or conveniently converted to structurally diverse benzo[b]furans through an environmentally benign, one-pot [3,3]-sigmatropic rearrangement/cyclization sequence.
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Affiliation(s)
- Hongyin Gao
- Division of Chemistry, Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX, 75390 (USA), Fax: (+1) 617-812-2685
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24
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Puthiaraj P, Pitchumani K. Triazine-Based Mesoporous Covalent Imine Polymers as Solid Supports for Copper-Mediated Chan-Lam Cross-Coupling N-Arylation Reactions. Chemistry 2014; 20:8761-70. [DOI: 10.1002/chem.201402365] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 04/24/2014] [Indexed: 01/07/2023]
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25
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O-Aryloxime ether analogues as novel and efficient ligands for palladium-catalyzed Suzuki–Miyaura coupling in water. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.03.113] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Mondal M, Bora U. Ligandless heterogeneous palladium: an efficient and recyclable catalyst for Suzuki-type cross-coupling reaction. Appl Organomet Chem 2014. [DOI: 10.1002/aoc.3135] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Manoj Mondal
- Department of Chemistry; Dibrugarh University; Dibrugarh 786004 Assam India
| | - Utpal Bora
- Department of Chemistry; Dibrugarh University; Dibrugarh 786004 Assam India
- Department of Chemical Sciences; Tezpur University; Tezpur 784028 Assam India
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27
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Gogoi A, Sarmah G, Dewan A, Bora U. Unique copper–salen complex: an efficient catalyst for N-arylations of anilines and imidazoles at room temperature. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2013.10.084] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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28
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da Costa DP, Nobre SM. Bisamides as ligands in Suzuki coupling reactions catalyzed by palladium. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.06.110] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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29
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