1
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Li S, Liu G, Zhang Z, Chen R, Tian H, Wang H, Chen X. Metal free C-O bond cleavage: a new strategy for the synthesis of substituted oxazoles. RSC Adv 2024; 14:28210-28214. [PMID: 39234524 PMCID: PMC11372780 DOI: 10.1039/d4ra05122j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2024] [Accepted: 08/19/2024] [Indexed: 09/06/2024] Open
Abstract
A strategy for the efficient metal-free C-O bond cleavage of ester using amines for the synthesis of substituted oxazoles was developed for the first time. The synthesis proceeded smoothly under metal-free conditions, combining C-O bond cleavage as well as C-N and C-O bond formation in one pot to yield desired products in moderate to excellent yields, and accommodated a wide range of functional groups and substrates.
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Affiliation(s)
- Shengwang Li
- Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Hubei University of Science and Technology Xianning 437100 China (+)86-715-8338007
| | - Guiqin Liu
- Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Hubei University of Science and Technology Xianning 437100 China (+)86-715-8338007
| | - Zheyan Zhang
- Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Hubei University of Science and Technology Xianning 437100 China (+)86-715-8338007
| | - Ruiling Chen
- School of Pharmacy, Changzhi Medical College Changzhi 046000 China
| | - Haiying Tian
- School of Pharmacy, Changzhi Medical College Changzhi 046000 China
| | - Huifeng Wang
- Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Hubei University of Science and Technology Xianning 437100 China (+)86-715-8338007
| | - Xiuling Chen
- Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Hubei University of Science and Technology Xianning 437100 China (+)86-715-8338007
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2
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Bera D, Sarkar R, Dhar T, Saha P, Ghosh P, Mukhopadhyay C. DMSO promoted catalyst-free oxidative C-N/C-O couplings towards synthesis of imidazoles and oxazoles. Org Biomol Chem 2024; 22:3684-3692. [PMID: 38624070 DOI: 10.1039/d4ob00383g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Dimethyl sulfoxide (DMSO)-promoted catalyst-free oxidative C-N coupling and C-O coupling under oxidant-free conditions are outlined. This protocol is operationally simple and leads to various functionalized substituted imidazoles or oxazoles in good yields. To date, a very limited number of oxidation protocols have been established, where DMSO acts solely as a catalyst or an oxidant or both. In this report, DMSO is not only used as a C-N/C-O coupling agent but is also used as the oxidant required for these oxidative transformations. Hence, our demonstrated DMSO-promoted catalyst-free coupling transformation has the ability to lead to a new dimension in the field of oxidative coupling.
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Affiliation(s)
- Debasish Bera
- Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata-700009, India.
| | - Rajib Sarkar
- Department of Chemistry, Prabhu Jagatbandhu College, Jhorehat, Andul-Mouri, Howrah-711302, India
| | - Tiyasa Dhar
- Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata-700009, India.
| | - Pinaki Saha
- Department of Chemistry, R. K. Mission Residential College, Narendrapur, Kolkata-700103, India
| | - Prasanta Ghosh
- Department of Chemistry, R. K. Mission Residential College, Narendrapur, Kolkata-700103, India
| | - Chhanda Mukhopadhyay
- Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata-700009, India.
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3
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Wu W, Zhang Z, Li J, Xia J, Han X, Weng Z. Copper Loading-Controlled Selective Synthesis of 2,5-Bis(trifluoromethyl) and Monotrifluoromethyl-Substituted Oxazoles. J Org Chem 2024; 89:589-598. [PMID: 38149374 DOI: 10.1021/acs.joc.3c02315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
A general domino annulation reaction of sulfonylmethyl isocyanide with trifluoroacetic anhydride in the presence of copper chloride as an additive is developed. The reaction affords 2,5-bis(trifluoromethyl)oxazoles in modest to good yields under mild conditions. A wide variety of sulfonylmethyl isocyanide and perfluorocarboxylic anhydride substrates are amenable to this transformation. Under a higher copper salt loading conditions, the reaction led to the formation of monotrifluoromethyl-substituted oxazole product.
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Affiliation(s)
- Wei Wu
- Fujian Provincial University Engineering Research Center of Green Materials and Chemical Engineering, and Fujian Engineering Research Center of New Chinese lacquer Material, College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, China
| | - Zipeng Zhang
- Key Laboratory of Molecule Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Jialong Li
- Fujian Provincial University Engineering Research Center of Green Materials and Chemical Engineering, and Fujian Engineering Research Center of New Chinese lacquer Material, College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, China
| | - Jianrong Xia
- Fujian Provincial University Engineering Research Center of Green Materials and Chemical Engineering, and Fujian Engineering Research Center of New Chinese lacquer Material, College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, China
| | - Xiaoyan Han
- Testing and Analysis Center, Soochow University, Suzhou 215123, China
| | - Zhiqiang Weng
- Fujian Provincial University Engineering Research Center of Green Materials and Chemical Engineering, and Fujian Engineering Research Center of New Chinese lacquer Material, College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, China
- Key Laboratory of Molecule Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou 350108, China
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4
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Yang Z, Sun F, Li Y, Yang K, Zhang J, Xu L, Zhao H, Du Y. Synthesis of 2-Fluoroalkylated Oxazoles from β-Monosubstituted Enamines via Fluoroacyloxylation and Cyclization Mediated by Fluoroalkyl-Containing Hypervalent Iodine(III) Species Generated In Situ. J Org Chem 2023. [PMID: 37450647 DOI: 10.1021/acs.joc.3c01032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
A metal-free synthesis of a series of fluoroalkyl-containing oxazoles from β-monosubstituted enamines was developed. This fluoroacyloxylation/cyclization cascade process was mediated by fluoroalkyl-containing hypervalent iodine(III) species formed in situ from the reaction of phenyliodine(III) diacetate (PIDA) and RCF2CO2H (R = H, Cl, Br, F, CF3, CH3, Ph, SAr, OAr).
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Affiliation(s)
- Zhifang Yang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Fengxia Sun
- Research Center for Chemical Safety & Security and Verification Technology & College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Yadong Li
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Kaiyue Yang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Jianing Zhang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Lingzhi Xu
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Hui Zhao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Yunfei Du
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
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5
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Li M, He Z, Zhao W, Yu Y, Huang F, Baell JB. Photocatalytic Benzylic C-H Oxidation/Cyclization of Enaminones to the Synthesis of Polysubstituted Oxazoles. J Org Chem 2023. [PMID: 37262016 DOI: 10.1021/acs.joc.3c00269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Photocatalytic benzylic C-H oxidation/cyclization of enaminones was efficiently achieved to afford oxazole derivatives under mild conditions. The oxygen in the oxazole ring originated from green oxidant molecular oxygen. The synthetic protocol features broad substrate scopes and good functional group tolerance. The combined experimental and theoretical studies reveal that in suit benzylic C-H oxidation/cyclization is involved in the reaction transformations.
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Affiliation(s)
- Mingrui Li
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Zhiqin He
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Wei Zhao
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Yang Yu
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Fei Huang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Jonathan B Baell
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China
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6
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Baidya M, Dutta J, De Sarkar S. Electrochemical Organoselenium Catalysis for the Selective Activation of Alkynes: Easy Access to Carbonyl-pyrroles/oxazoles from N-Propargyl Enamines/Amides. Org Lett 2023; 25:3812-3817. [PMID: 37196050 DOI: 10.1021/acs.orglett.3c01355] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Intramolecular electro-oxidative addition of enamines or amides to nonactivated alkynes was attained to access carbonyl-pyrroles or -oxazoles from N-propargyl derivatives. Organoselenium was employed as the electrocatalyst, which played a crucial role as a π-Lewis acid and selectively activated the alkyne for the successful nucleophilic addition. The synthetic strategy permits a wide range of substrate scope up to 93% yield. Several mechanistic experiments, including the isolation of a selenium-incorporated intermediate adduct, enlighten the electrocatalytic pathway.
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Affiliation(s)
- Mrinmay Baidya
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, West Bengal, India
| | - Jhilik Dutta
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, West Bengal, India
| | - Suman De Sarkar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, West Bengal, India
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7
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Mityanov VS, Podrezova AG, Kutasevich AV, Pytskii IS, Khrustalev VN. Boron Trifluoride‐Mediated Synthesis of Oxazole
N
‐oxides. ChemistrySelect 2022. [DOI: 10.1002/slct.202203421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Vitaly S. Mityanov
- Department of Fine Organic Synthesis and Chemistry of Dyes Mendeleev University of Chemical Technology Miusskaya Sq., 9 Moscow 125047 Russian Federation
| | - Alexandra G. Podrezova
- Department of Fine Organic Synthesis and Chemistry of Dyes Mendeleev University of Chemical Technology Miusskaya Sq., 9 Moscow 125047 Russian Federation
| | - Anton V. Kutasevich
- Department of Fine Organic Synthesis and Chemistry of Dyes Mendeleev University of Chemical Technology Miusskaya Sq., 9 Moscow 125047 Russian Federation
| | - Ivan S. Pytskii
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry Academy of Sciences Leninsky prospect 31 bldg. 4 119071 Moscow Russian Federation
| | - Victor N. Khrustalev
- N.D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prosp. 47 119071 Moscow Russian Federation
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8
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Yaragorla S, Latha DS. Chemo- and Stereoselective Synthesis of Substituted Thiazoles from tert-Alcohols Bearing Alkene and Alkyne Groups with Alkaline Earth Catalysts. ACS OMEGA 2022; 7:34693-34706. [PMID: 36188313 PMCID: PMC9520744 DOI: 10.1021/acsomega.2c05085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/05/2022] [Indexed: 06/16/2023]
Abstract
We report here that thioamides can distinguish C-C double bonds and C-C triple bonds chemoselectively when subjected to a reaction with pent-1-en-4-yn-3-ol derivatives in the presence of Ca(OTf)2. This protocol offers a fast, efficient, and high-yielding synthesis of functionalized thiazoles. Interestingly, this reaction offers a time-dependent formation of kinetic and thermodynamic products. The products showed stereoselectivity concerning the alkene geometry. Further, we extended this protocol to synthesize oxazoles from propargyl alcohols and ibuprofen (NSAID) was converted into amide and then subjected to oxazole formation with tert-propargyl alcohols.
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9
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Jankowski N, Dietrich J, Krause N. Transition Metal‐free Cycloisomerization of Propargylic Amides to Oxazoles in Hexafluoroisopropanol (HFIP). Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Bao L, Liu C, Li W, Yu J, Wang M, Zhang Y. Electrochemical Synthesis of Polysubstituted Oxazoles from Ketones and Acetonitrile. Org Lett 2022; 24:5762-5766. [PMID: 35912587 DOI: 10.1021/acs.orglett.2c02252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we report an electrochemical strategy for the construction of polysubstituted oxazoles from easily available ketones and acetonitrile under room temperature. The method shows high efficiency, a broad substrate scope, and requires no external chemical oxidant. Mechanistic investigations suggest that the reaction proceeds through a Ritter-type reaction/oxidative cyclization using acetonitrile as the reactant and solvent. X-ray crystallographic analysis reveals that the reaction involves the attack of acetonitrile on the carbonyl carbon instead of the α-carbon.
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Affiliation(s)
- Liang Bao
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Chen Liu
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Wenyi Li
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Jiage Yu
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Min Wang
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
| | - Yunfei Zhang
- Department of Chemistry, China Agricultural University, Beijing 100193, P. R. China
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11
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Pankova AS. Two-Step Construction of Thiophene-Oxazole Dyads with Fluorescent Properties by the Ring Expansion of Aziridines. J Org Chem 2022; 87:11121-11130. [PMID: 35905291 DOI: 10.1021/acs.joc.2c01365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A general approach toward 2-thiophenylsubstituted oxazoles using aziridination of a double bond of (acyl)alkenyl thiophenes with the subsequent expansion of the aziridine ring is developed. The isolation of intermediate aziridine is not necessary. This expedient protocol covers a broad scope of readily available 2-, 3-, and benzothiophene derivatives, is practical and reliable, requires short reaction times, and is simple to set up and work up reaction mixtures. Thiophenyloxazoles, obtained by this method, exhibit fluorescence with high quantum yields.
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Affiliation(s)
- Alena S Pankova
- Institute of Chemistry, Saint Petersburg State University, 198504 Saint Petersburg, Russia
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12
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Gaykar RN, Deswal S, Guin A, Bhattacharjee S, Biju AT. Synthesis of Trisubstituted Oxazoles via Aryne Induced [2,3] Sigmatropic Rearrangement-Annulation Cascade. Org Lett 2022; 24:4145-4150. [PMID: 35666528 DOI: 10.1021/acs.orglett.2c01379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A transition-metal-free, [2,3] sigmatropic rearrangement-annulation cascade of 2-substituted thio/amino acetonitriles with arynes allowing the synthesis of 2,4,5-trisubstituted oxazoles under mild conditions has been demonstrated. The key sulfur/nitrogen ylides were generated by the initial S/N arylation followed by proton transfer, which was followed by the selective [2,3] sigmatropic rearrangement involving the -CN moiety and a subsequent annulation to afford the desired products in reasonable yields.
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Affiliation(s)
- Rahul N Gaykar
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Shiksha Deswal
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Avishek Guin
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Subrata Bhattacharjee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
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13
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Goulart TAC, Recchi AMS, Back DF, Zeni G. Synthesis of 4-(organoselenyl) oxazolones via cyclization of N-alkynyl ethylcarbamates promoted by organoselenium. Org Biomol Chem 2022; 20:4773-4781. [PMID: 35617024 DOI: 10.1039/d2ob00682k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organoselenyl iodide promoted the intramolecular nucleophilic cyclization of N-alkynyl ethylcarbamates in the synthesis of 4-(organoselenyl) oxazolones. The reaction was regioselective, giving the five-membered oxazolone products as the unique regioisomer via an initial activation of the carbon-carbon triple bond through a seleniranium intermediate, followed by an intramolecular 5-endo-dig cyclization mode. The generality of the methodology has been proven by applying the optimized reaction conditions to different organoselenyl iodides and N-alkynyl ethylcarbamates having different substituents directly bonded to the nitrogen atom and in the terminal position of the alkyne.
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Affiliation(s)
- Tales A C Goulart
- Laboratorio de Sintese, Reatividade, Avaliaçao Farmacologica e Toxicologica de Organocalcogenios, CCNE, UFSM, Santa Maria, Rio Grande do Sul, 97105-900, Brasil.
| | - Ana Maria S Recchi
- Laboratorio de Sintese, Reatividade, Avaliaçao Farmacologica e Toxicologica de Organocalcogenios, CCNE, UFSM, Santa Maria, Rio Grande do Sul, 97105-900, Brasil.
| | - Davi Fernando Back
- Laboratorio de Materiais Inorganicos, CCNE, UFSM, Santa Maria, Rio Grande do Sul, 97105-900, Brasil
| | - Gilson Zeni
- Laboratorio de Sintese, Reatividade, Avaliaçao Farmacologica e Toxicologica de Organocalcogenios, CCNE, UFSM, Santa Maria, Rio Grande do Sul, 97105-900, Brasil.
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14
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KI-TBHP mediated cascade oxidative annulations of enaminones: A facile approach towards 2, 4, 5-Trisubstituted oxazoles. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Borah B, Chowhan LR. Ultrasound-assisted transition-metal-free catalysis: a sustainable route towards the synthesis of bioactive heterocycles. RSC Adv 2022; 12:14022-14051. [PMID: 35558846 PMCID: PMC9092113 DOI: 10.1039/d2ra02063g] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 04/27/2022] [Indexed: 12/13/2022] Open
Abstract
Heterocycles of synthetic and natural origin are a well-established class of compounds representing a broad range of organic molecules that constitute over 60% of drugs and agrochemicals in the market or research pipeline. Considering the vast abundance of these structural motifs, the development of chemical processes providing easy access to novel complex target molecules by introducing environmentally benign conditions with the main focus on improving the cost-effectiveness of the chemical transformation is highly demanding and challenging. Accordingly, sonochemistry appears to be an excellent alternative and a highly feasible environmentally benign energy input that has recently received considerable and steadily increasing interest in organic synthesis. However, the involvement of transition-metal-catalyst(s) in a chemical process often triggers an unintended impact on the greenness or sustainability of the transformation. Consequently, enormous efforts have been devoted to developing metal-free routes for assembling various heterocycles of medicinal interest, particularly under ultrasound irradiation. The present review article aims to demonstrate a brief overview of the current progress accomplished in the ultrasound-assisted synthesis of pharmaceutically relevant diverse heterocycles using transition-metal-free catalysis.
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Affiliation(s)
- Biplob Borah
- School of Applied Material Sciences, Centre for Applied Chemistry, Central University of Gujarat Gandhinagar-382030 India
| | - L Raju Chowhan
- School of Applied Material Sciences, Centre for Applied Chemistry, Central University of Gujarat Gandhinagar-382030 India
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16
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Umakoshi Y, Takemoto Y, Tsubouchi A, Zhdankin VV, Yoshimura A, Saito A. Dehydrogenative Cycloisomerization/Arylation Sequence of
N
‐Propargyl Carboxamides with Arenes by Iodine(III)‐Catalysis. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200219] [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)
- Yuki Umakoshi
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
| | - Yusuke Takemoto
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
| | - Akira Tsubouchi
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
| | - Viktor V. Zhdankin
- Department of Chemistry and Biochemistry University of Minnesota Duluth MN 55812 USA
| | - Akira Yoshimura
- Department of Chemistry and Biochemistry University of Minnesota Duluth MN 55812 USA
- Research School of Chemistry and Applied Biomedical Sciences The Tomsk Polytechnic University, postCode/>634050 Tomsk Russia
| | - Akio Saito
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology Koganei Tokyo 184-8588 Japan
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17
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Qu Z, Tian T, Deng GJ, Huang H. Diverse catalytic systems for nitrogen-heterocycle formation from O-acyl ketoximes. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.05.079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Oberheide A, Gaigne F, Arndt H. Divergent Synthesis of C5‐Heteroatom Substituted Oxazoles. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ansgar Oberheide
- Friedrich-Schiller-Universität Jena Institut für Organische Chemie und Makromolekulare Chemie Humboldtstr. 10 D-07743 Jena Germany
| | - Frédéric Gaigne
- Friedrich-Schiller-Universität Jena Institut für Organische Chemie und Makromolekulare Chemie Humboldtstr. 10 D-07743 Jena Germany
| | - Hans‐Dieter Arndt
- Friedrich-Schiller-Universität Jena Institut für Organische Chemie und Makromolekulare Chemie Humboldtstr. 10 D-07743 Jena Germany
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19
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Basavaiah D, Golime G, Banoth S, Todeti S. An umpolung strategy for intermolecular [2 + 2 + 1] cycloaddition of aryl aldehydes and nitriles: a facile access to 2,4,5-trisubstituted oxazoles. Chem Sci 2022; 13:8080-8087. [PMID: 35919435 PMCID: PMC9278343 DOI: 10.1039/d2sc00046f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 06/10/2022] [Indexed: 11/21/2022] Open
Abstract
We have described the first example of an umpolung strategy for intermolecular [2 + 2 + 1] cycloaddition between two aryl aldehydes and a nitrile under the influence of TMSOTf that proceeds through the formation of N–C, O–C and C–C bonds providing a simple synthetic protocol for obtaining 2,4,5-trisubstituted oxazoles. An unprecedented intermolecular [2 + 2 + 1] cycloaddition strategy between two aryl aldehydes and a nitrile, wherein one of the aryl aldehydes serves as a carbanion (or equivalent) in the presence of TMSOTf for obtaining oxazole framework is presented.![]()
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Affiliation(s)
- Deevi Basavaiah
- School of Chemistry, University of Hyderabad, Hyderabad-500046, India
| | | | - Shivalal Banoth
- School of Chemistry, University of Hyderabad, Hyderabad-500046, India
| | - Saidulu Todeti
- School of Chemistry, University of Hyderabad, Hyderabad-500046, India
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20
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Wahby Y, Abdel-Hamid H, Ayoup MS. Two decades of recent advances of Passerini reactions: synthetic and potential pharmaceutical applications. NEW J CHEM 2022. [DOI: 10.1039/d1nj03832j] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This perspective describes the applications of Passerini reactions in the last two decades from 2000 to 2021 in pharmaceutical applications and synthesis of peptides, natural products, macrocycles, dendrimers, and versatile types of heterocycles.
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Affiliation(s)
- Yasmin Wahby
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria, 21321, Egypt
| | - Hamida Abdel-Hamid
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria, 21321, Egypt
| | - Mohammed Salah Ayoup
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria, 21321, Egypt
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21
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Buil M, Esteruelas MA, Oñate E, Picazo NR. Dissimilarity in the Chemical Behavior of Osmaoxazolium Salts and Osmaoxazoles: Two Different Aromatic Metalladiheterocycles. Organometallics 2021; 40:4150-4162. [PMID: 35264819 PMCID: PMC8895684 DOI: 10.1021/acs.organomet.1c00621] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Indexed: 12/15/2022]
Abstract
The preparation of aromatic hydride-osmaoxazolium and hydride-oxazole compounds is reported and their reactivity toward phenylacetylene investigated. Complex [OsH(OH)(≡CPh)(IPr)(PiPr3)]OTf (1; IPr = 1,3-bis(2,6-diisopropylphenyl)imidazolylidene, OTf = CF3SO3) reacts with acetonitrile and benzonitrile to give [OsH{κ2-C,O-[C(Ph)NHC(R)O]}(NCR)(IPr)(PiPr3)]OTf (R = Me (2), Ph (3)) via amidate intermediates, which are generated by addition of the hydroxide ligand to the nitrile. In agreement with this, the addition of 2-phenylacetamide to acetonitrile solutions of 1 gives [OsH{κ2-C,O-[C(Ph)NHC(CH2Ph)O]}(NCCH3)(IPr)(PiPr3)]OTf (4). The deprotonation of the osmaoxazolium ring of 2 and 4 leads to the oxazole derivatives OsH{κ2-C,O-[C(Ph)NC(R)O]}(IPr)(PiPr3) (R = Me (5), CH2Ph (6)). Complexes 2 and 4 add their Os-H and Os-C bonds to the C-C triple bond of phenylacetylene to afford [Os{η3-C 3 ,κ1-O-[CH2C(Ph)C(Ph)NHC(R)O]}(NCCH3)2(IPr)]OTf (R = Me (7), CH2Ph (8)), bearing a tridentate amide-N-functionalized allyl ligand, while complexes 5 and 6 undergo a vicarious nucleophilic substitution of the hydride at the metal center with the alkyne, via the compressed dihydride adduct intermediates OsH2(C≡CPh){κ2-C,O-[C(Ph)NC(R)O]}(IPr)(PiPr3) (R = Me (9), CH2Ph (10)), which reductively eliminate H2 to yield the acetylide-osmaoxazoles Os(C≡CPh){κ2-C,O-[C(Ph)NC(R)O]}(IPr)(PiPr3) (R = Me (11), CH2Ph (12)).
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Affiliation(s)
- María
L. Buil
- Departamento de Química Inorgánica,
Instituto de Síntesis Química y Catálisis Homogénea
(ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento de Química Inorgánica,
Instituto de Síntesis Química y Catálisis Homogénea
(ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento de Química Inorgánica,
Instituto de Síntesis Química y Catálisis Homogénea
(ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Nieves R. Picazo
- Departamento de Química Inorgánica,
Instituto de Síntesis Química y Catálisis Homogénea
(ISQCH), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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22
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Qin F, Wang H, Cao T, Liu Q, Xu Q, Zheng H, Zhu M, Li T, Liu Y, Wei W. Metal‐free Radical Cyclization of Olefinic 1,3‐Dicarbonyls and Olefinic Amides with Nitrile C(sp
3
)−H Bonds in Aqueous Media. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Fu‐Hua Qin
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products School of Materials Science and Chemical Engineering Ningbo University Ningbo, Zhejiang 315211 P. R. China
| | - Hui‐Zhi Wang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products School of Materials Science and Chemical Engineering Ningbo University Ningbo, Zhejiang 315211 P. R. China
| | - Ting‐Ting Cao
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products School of Materials Science and Chemical Engineering Ningbo University Ningbo, Zhejiang 315211 P. R. China
| | - Qi‐Li Liu
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products School of Materials Science and Chemical Engineering Ningbo University Ningbo, Zhejiang 315211 P. R. China
| | - Qing Xu
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products School of Materials Science and Chemical Engineering Ningbo University Ningbo, Zhejiang 315211 P. R. China
| | - Hongxing Zheng
- Institution of Functional Organic Molecules and Materials School of Chemistry and Chemical Engineering Liaocheng University Liaocheng, Shandong 252059 P. R. China
| | - Meiling Zhu
- College of Chemistry and Pharmaceutical Engineering Nanyang Normal University Nanyang, Henan 473061 P. R. China
| | - Ting Li
- College of Chemistry and Pharmaceutical Engineering Nanyang Normal University Nanyang, Henan 473061 P. R. China
| | - Yi‐Lin Liu
- College of Chemistry and Materials Engineering Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol (PVA) Fiber Material Huaihua University Huaihua, Hunan 418008 P. R. China
| | - Wen‐Ting Wei
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products School of Materials Science and Chemical Engineering Ningbo University Ningbo, Zhejiang 315211 P. R. China
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23
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Application of nitriles on the synthesis of 1,3-oxazoles, 2-oxazolines, and oxadiazoles: An update from 2014 to 2021. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132544] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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24
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Borah B, Dhar Dwivedi K, Chowhan LR. 4‐Hydroxycoumarin: A Versatile Substrate for Transition‐metal‐free Multicomponent Synthesis of Bioactive Heterocycles. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100550] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Biplob Borah
- School of Applied Material Sciences Centre for Applied Chemistry Central University of Gujarat Sector-30 Gandhinagar 382030 India
| | - Kartikey Dhar Dwivedi
- School of Applied Material Sciences Centre for Applied Chemistry Central University of Gujarat Sector-30 Gandhinagar 382030 India
| | - L. Raju Chowhan
- School of Applied Material Sciences Centre for Applied Chemistry Central University of Gujarat Sector-30 Gandhinagar 382030 India
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25
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Huang P, Hong R, Hong F. Palladium catalyzed Carbon–Hydrogen bond activation on amino‐substituted quinones under acidic condition. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202100375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Peng‐Hao Huang
- Department of Chemistry National Chung Hsing University Taichung Taiwan
| | - Rui‐Yu Hong
- Department of Chemistry National Chung Hsing University Taichung Taiwan
| | - Fung‐E Hong
- Department of Chemistry National Chung Hsing University Taichung Taiwan
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26
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Linkova EI, Grinev VS, Mayorova OA, Yegorova AY. The study of the reaction paths of 4-aryl-4-oxobutanoic acids with terminal aliphatic N,N-diamines. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2021.103350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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27
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Saito A. Metal-Free Synthesis of Heterocycles via Activation of Alkynes by Hypervalent Iodine. J SYN ORG CHEM JPN 2021. [DOI: 10.5059/yukigoseikyokaishi.79.766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Akio Saito
- Department of Applied Chemistry, Tokyo University of Agriculture and Technology
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28
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Kajol K, Ramesh C. Sequential One‐pot Method for the Synthesis of 4‐(Hydroxymethyl)oxazoles and their Application in Phosphonates Synthesis. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202000710] [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)
- Km Kajol
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension Sitapur Road, P.O. Box 173 Lucknow 226031 India
| | - Chintakunta Ramesh
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension Sitapur Road, P.O. Box 173 Lucknow 226031 India
- Academy of Scientific and Innovative Research New Delhi 110001 India
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29
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Oberheide A, Arndt H. Effective C5‐Arylation of Peptide‐Integrated Oxazoles: Almazole D. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001262] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ansgar Oberheide
- Friedrich-Schiller-Universität Jena Institut für Organische Chemie und Makromolekulare Chemie Humboldstr. 10 D-07743 Jena
| | - Hans‐Dieter Arndt
- Friedrich-Schiller-Universität Jena Institut für Organische Chemie und Makromolekulare Chemie Humboldstr. 10 D-07743 Jena
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30
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Sattler LE, Hilt G. Iodonium Cation-Pool Electrolysis for the Three-Component Synthesis of 1,3-Oxazoles. Chemistry 2021; 27:605-608. [PMID: 33270278 PMCID: PMC7839530 DOI: 10.1002/chem.202004140] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/07/2020] [Indexed: 01/17/2023]
Abstract
The synthesis of 1,3-oxazoles from symmetrical and unsymmetrical alkynes was realized by an iodonium cation-pool electrolysis of I2 in acetonitrile with a well-defined water content. Mechanistic investigations suggest that the alkyne reacts with the acetonitrile-stabilized I+ ions, followed by a Ritter-type reaction of the solvent to a nitrilium ion, which is then attacked by water. The ring closure to the 1,3-oxazoles released molecular iodine, which was visible by the naked eye. Also, some unsymmetrical internal alkynes were tested and a regioselective formation of a single isomer was determined by two-dimensional NMR experiments.
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Affiliation(s)
- Lars E. Sattler
- Institut für ChemieOldenburg UniversityCarl-von-Ossietzky-Strasse 9–1126111OldenburgGermany
| | - Gerhard Hilt
- Institut für ChemieOldenburg UniversityCarl-von-Ossietzky-Strasse 9–1126111OldenburgGermany
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31
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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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32
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Fang WY, Wang SM, Zhang ZW, Qin HL. Clickable Transformation of Nitriles (RCN) to Oxazolyl Sulfonyl Fluoride Warheads. Org Lett 2020; 22:8904-8909. [PMID: 33164523 DOI: 10.1021/acs.orglett.0c03298] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The protocol for simple, efficient, and mild synthesis of oxazolyl sulfonyl fluorides was developed through Rh2(OAc)4-catalyzed annulation of methyl-2-diazo-2-(fluorosulfonyl)acetate (MDF) or its ethyl ester derivative with nitriles. This practical method provides a general and direct route to a unique class of highly functionalized oxazolyl-decorated sulfonyl fluoride warheads with great potential in medicinal chemistry, chemical biology, and drug discovery.
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Affiliation(s)
- Wan-Yin Fang
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, People's Republic of China
| | - Shi-Meng Wang
- School of Life Science, Wuchang University of Technology, Wuhan, 430223, People's Republic of China
| | - Zai-Wei Zhang
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, People's Republic of China
| | - Hua-Li Qin
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, People's Republic of China
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33
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Mukku N, Madivalappa Davanagere P, Chanda K, Maiti B. A Facile Microwave-Assisted Synthesis of Oxazoles and Diastereoselective Oxazolines Using Aryl-Aldehydes, p-Toluenesulfonylmethyl Isocyanide under Controlled Basic Conditions. ACS OMEGA 2020; 5:28239-28248. [PMID: 33163807 PMCID: PMC7643254 DOI: 10.1021/acsomega.0c04130] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 10/06/2020] [Indexed: 06/11/2023]
Abstract
In this study, a highly efficient two-component [3 + 2] cycloaddition reaction of substituted aryl aldehydes with 4-toluenesulfonylmethyl isocyanide (TosMIC) in the presence of 2 equiv of potassium phosphate as a base to 5-substituted oxazoles were established in a isopropanol medium under microwave irradiation. However, using 1 equiv of K3PO4 as a base resulted in the diastereoselective synthesis of 4,5-disubstituted oxazolines under identical reaction conditions. The foremost benefits of these protocols are the moderate-to-excellent yields with good functional group compatibility, simple experimental procedure, inexpensive readily available starting materials, nonchromatographic purification, and high bond-forming efficiency. The synthetic manipulation reported herein represents a cleaner route to the sustainable preparation of 5-substituted oxazoles and diastereoselective 4,5-disubstituted oxazolines derivatives.
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Affiliation(s)
- Narasimharao Mukku
- Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology, Vellore 632014, India
| | | | - Kaushik Chanda
- Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology, Vellore 632014, India
| | - Barnali Maiti
- Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology, Vellore 632014, India
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34
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He M, Chen Y, Luo Y, Li J, Lai R, Yang Z, Wang Y, Wu Y. Transition-metal-free [3+3] annulation reaction of sulfoxonium ylides with cyclopropenones for the synthesis of 2-pyrones. GREEN SYNTHESIS AND CATALYSIS 2020. [DOI: 10.1016/j.gresc.2020.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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35
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Chen J, Li Z, Suleman M, Wang Z, Lu P, Wang Y. TfOH-promoted synthesis of 4,5-dihydrooxazolo[5,4- c]isoquinolines via formal [3 + 2] cycloaddition of 4-diazoisoquinolin-3-one and benzonitriles. Org Biomol Chem 2020; 18:7671-7676. [PMID: 32966526 DOI: 10.1039/d0ob01748e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A facile and efficient method for the synthesis of novel 2-substituted 4-tosyl-4,5-dihydrooxazolo[5,4-c]isoquinolines from 4-diazoisoquinolin-3-ones and nitriles is reported. The reaction proceeded through a TfOH-promoted formal [3 + 2] cycloaddition and the products could be conveniently converted to 2-aryloxazolo[5,4-c]isoquinolines and the subsequent 2-(oxazolo[5,4-c]isoquinolin-2-yl)phenol which emitted bright green light in dilute dichloromethane solution and in solid form as well. Simple operation, metal-free and mild reaction conditions, short reaction time and broad substrate scope are the prominent features of this methodology.
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Affiliation(s)
- Junrong Chen
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China.
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36
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Harisha MB, Dhanalakshmi P, Suresh R, Kumar RR, Muthusubramanian S. Access to highly substituted oxazoles by the reaction of α-azidochalcone with potassium thiocyanate. Beilstein J Org Chem 2020; 16:2108-2118. [PMID: 32952727 PMCID: PMC7476590 DOI: 10.3762/bjoc.16.178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 08/21/2020] [Indexed: 12/27/2022] Open
Abstract
The reactivity of α-azidochalcones has been explored for the preparation of highly substituted oxazoles via a 2H-azirine intermediate. The azidochalcones, when treated with potassium thiocyanate in the presence of potassium persulfate, lead to 2,4,5-trisubstituted oxazoles in good yields. Incidentally, 2-aminothiazoles are the products when ferric nitrate is employed instead of persulfate in the above reaction.
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Affiliation(s)
- Mysore Bhyrappa Harisha
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai-625 021, Tamil Nadu, India.,Eurofins-Advinus Limited, Phase II, Peenya Industrial Area, Bangalore-560 058, India
| | - Pandi Dhanalakshmi
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai-625 021, Tamil Nadu, India.,Department of Inorganic and Physical Chemistry, Indian Institute of Science (IISc), Bangalore-560 012, India
| | - Rajendran Suresh
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai-625 021, Tamil Nadu, India
| | - Raju Ranjith Kumar
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai-625 021, Tamil Nadu, India
| | - Shanmugam Muthusubramanian
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai-625 021, Tamil Nadu, India
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37
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Li J, Zhu SR, Xu Y, Lu XC, Wang ZB, Liu L, Xu DF. Synthesis of 2,5-diaryloxazoles through rhodium-catalyzed annulation of triazoles and aldehydes. RSC Adv 2020; 10:24795-24799. [PMID: 35517461 PMCID: PMC9055139 DOI: 10.1039/d0ra03966g] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 06/11/2020] [Indexed: 02/01/2023] Open
Abstract
An efficient synthesis of a variety of 2,5-diaryloxazole derivatives via a rhodium-catalyzed annulation of triazoles and aldehydes is achieved. Various oxazole derivatives could be obtained in good to excellent yields. A concise synthesis of antimycobaterial natural products balsoxin and texamine has been achieved using this method.
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Affiliation(s)
- Jian Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmaceutical Engineering & Life Sciences, Changzhou University Changzhou 213164 China
| | - Shang-Rong Zhu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmaceutical Engineering & Life Sciences, Changzhou University Changzhou 213164 China
| | - Yue Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmaceutical Engineering & Life Sciences, Changzhou University Changzhou 213164 China
| | - Xue-Chen Lu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmaceutical Engineering & Life Sciences, Changzhou University Changzhou 213164 China
| | - Zheng-Bing Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmaceutical Engineering & Life Sciences, Changzhou University Changzhou 213164 China
| | - Li Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmaceutical Engineering & Life Sciences, Changzhou University Changzhou 213164 China
| | - De-Feng Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmaceutical Engineering & Life Sciences, Changzhou University Changzhou 213164 China
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38
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Saito A, Togo H. Photochemical Transformation of O
-(β-Arylethyl) Arylimidates into 2,4-Diaryl-5-iodoxazoles with 1,3-Diiodo-5,5-dimethylhydantoin. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Aya Saito
- Graduate School of Science; Chiba University; Yayoi-cho 1-33 263-8522 Chiba Inage-ku Japan
| | - Hideo Togo
- Graduate School of Science; Chiba University; Yayoi-cho 1-33 263-8522 Chiba Inage-ku Japan
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39
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Wang Z, Meng XH, Liu P, Hu WY, Zhao YL. Rhodium-catalyzed homodimerization–cyclization reaction of two vinyl isocyanides: a general route to 2-(isoquinolin-1-yl)oxazoles. Org Chem Front 2020. [DOI: 10.1039/c9qo01229j] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A novel rhodium-catalyzed homodimerization–cyclization reaction of two vinyl isocyanides has been developed for the synthesis of 2-(isoquinolin-1-yl)oxazoles by formation of three new bonds and two rings in a single step.
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Affiliation(s)
- Zhuo Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
| | - Xiang-He Meng
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
| | - Pei Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
| | - Wan-Ying Hu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
| | - Yu-Long Zhao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
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40
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Kotha S, Rao Cheekatla S. Design and Synthesis of Pentacycloundecane Cage Compound Containing Oxazole Moiety. HETEROCYCLES 2020. [DOI: 10.3987/com-20-14288] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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41
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Song GT, Qu CH, Meng JP, Xu ZG, Zhou CH, Chen ZZ. Photoredox catalytic cascade radical addition/aromatization of methylene-2-oxazolines: Mild access to C(sp)-difluoro-oxazole derivatives. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151246] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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42
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Xiao F, Yuan S, Huang H, Zhang F, Deng GJ. Copper-Catalyzed Three-Component Domino Cyclization for the Synthesis of 4-Aryl-5-(arythio)-2-(trifluoromethyl)oxazoles. Org Lett 2019; 21:8533-8536. [PMID: 31603338 DOI: 10.1021/acs.orglett.9b02934] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A copper-catalyzed oxidative cyclization of oxime, arylthiol, and trifluoroacetic anhydride for the construction of trisubstituted oxazoles has been developed. This transformation combines N-O bond cleavage, C-H functionalization, and intramolecular annulation, providing a practical protocol for the introduction of a trifluoromethyl (-CF3) group at oxazole rings.
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Affiliation(s)
- Fuhong Xiao
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry , Key Laboratory for Green Organic Synthesis and Application of Hunan Province Xiangtan University , Xiangtan 411105 , China
| | - Shanshan Yuan
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry , Key Laboratory for Green Organic Synthesis and Application of Hunan Province Xiangtan University , Xiangtan 411105 , China
| | - Huawen Huang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry , Key Laboratory for Green Organic Synthesis and Application of Hunan Province Xiangtan University , Xiangtan 411105 , China
| | - Feng Zhang
- College of Science , Hunan Agricultural University , Changsha 410128 , China
| | - Guo-Jun Deng
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry , Key Laboratory for Green Organic Synthesis and Application of Hunan Province Xiangtan University , Xiangtan 411105 , China
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Zamani P, Phipps J, Hu J, Cheema F, Amiri Rudbari H, Bordbar AK, Khosropour AR, Beyzavi H. Multicomponent Synthesis of Diversified Chromeno[3,2- d]oxazoles. ACS COMBINATORIAL SCIENCE 2019; 21:557-561. [PMID: 31276369 DOI: 10.1021/acscombsci.9b00084] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A practical and efficient synthetic procedure to novel chromeno[3,2-d]oxazoles through a one-pot sequential multistep process is presented. This procedure proceeds efficiently in propylene carbonate (PC) as a green solvent and affords a wide range of the chromenooxazole scaffolds.
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Affiliation(s)
- Parisa Zamani
- Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Joshua Phipps
- Cell and Molecular Biology Program, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Jiyun Hu
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Faizan Cheema
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Hadi Amiri Rudbari
- Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | | | - Ahmad R. Khosropour
- Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Hudson Beyzavi
- Cell and Molecular Biology Program, University of Arkansas, Fayetteville, Arkansas 72701, United States
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, United States
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Mei M, Anand D, Zhou L. Divergent Conversion of N-Acyl-isoxazol-5(2 H)-ones to Oxazoles and 1,3-Oxazin-6-ones Using Photoredox Catalysis. Org Lett 2019; 21:3548-3553. [PMID: 31059271 DOI: 10.1021/acs.orglett.9b00903] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The fragmentation of N-acyl-isoxazol-5-ones using visible light photoredox catalysis has been disclosed. The catalyst-controlled divergent mechanisms, namely the oxidative and reductive quenching catalytic cycle, are utilized. Various oxazoles and 1,3-oxazin-6-ones are selectively obtained from the same isoxazol-5-one skeleton under mild conditions.
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Affiliation(s)
- Mingjing Mei
- School of Chemistry , Sun Yat-Sen University , 135 Xingang West Road , Guangzhou , 510275 , China
| | - Devireddy Anand
- School of Chemistry , Sun Yat-Sen University , 135 Xingang West Road , Guangzhou , 510275 , China
| | - Lei Zhou
- School of Chemistry , Sun Yat-Sen University , 135 Xingang West Road , Guangzhou , 510275 , China
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46
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Babu VN, Murugan A, Katta N, Devatha S, Sharada DS. Exocyclic N-Acyliminium Ion (NAI) Cyclization: Access to Fully Substituted Oxazoles and Furocoumarins. J Org Chem 2019; 84:6631-6641. [DOI: 10.1021/acs.joc.9b00096] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Venkata Nagarjuna Babu
- Catalysis & Chemical Biology Laboratory, Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi 502285, Sangareddy, Telangana, India
| | - Arumugavel Murugan
- Catalysis & Chemical Biology Laboratory, Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi 502285, Sangareddy, Telangana, India
| | - Narenderreddy Katta
- Catalysis & Chemical Biology Laboratory, Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi 502285, Sangareddy, Telangana, India
| | - Suman Devatha
- Catalysis & Chemical Biology Laboratory, Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi 502285, Sangareddy, Telangana, India
| | - Duddu S. Sharada
- Catalysis & Chemical Biology Laboratory, Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi 502285, Sangareddy, Telangana, India
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47
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Szabó T, Dancsó A, Ábrányi-Balogh P, Volk B, Milen M. First reported propylphosphonic anhydride (T3P®) mediated Robinson–Gabriel cyclization. Synthesis of natural and unnatural 5-(3-indolyl)oxazoles. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.04.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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48
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Banerji B, Adhikary S, Majumder L, Ghosh S. A Green Synthetic Approach towards Polyarylated Oxazoles via Iodine‐Catalyzed One‐Pot sp
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C−H Functionalization in Water: From Natural Product Synthesis To Photophysical Studies. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201800742] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Biswadip Banerji
- Organic and Medicinal Chemistry DivisionIndian Institute of Chemical Biology (CSIR-IICB) 4 Raja S. C. Mullick Road Kolkata 700032 India
- Academy of Scientific and Innovative Research (AcSIR)Indian Institute of Chemical Biology (CSIR-IICB) 4 Raja S. C. Mullick Road Kolkata 700032 India
| | - Saswati Adhikary
- Organic and Medicinal Chemistry DivisionIndian Institute of Chemical Biology (CSIR-IICB) 4 Raja S. C. Mullick Road Kolkata 700032 India
| | - Leena Majumder
- Organic and Medicinal Chemistry DivisionIndian Institute of Chemical Biology (CSIR-IICB) 4 Raja S. C. Mullick Road Kolkata 700032 India
| | - Saswati Ghosh
- Organic and Medicinal Chemistry DivisionIndian Institute of Chemical Biology (CSIR-IICB) 4 Raja S. C. Mullick Road Kolkata 700032 India
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49
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Liu N, Chao F, Liu MG, Huang NY, Zou K, Wang L. Odorless Isocyanide Chemistry: One-Pot Synthesis of Heterocycles via the Passerini and Postmodification Tandem Reaction Based on the in Situ Capture of Isocyanides. J Org Chem 2019; 84:2366-2371. [DOI: 10.1021/acs.joc.8b03242] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Na Liu
- Key laboratory of inorganic nonmetallic crystalline and energy conversion materials, College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China
| | - Fei Chao
- Key laboratory of inorganic nonmetallic crystalline and energy conversion materials, College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China
| | - Ming-Guo Liu
- Hubei Key Laboratory of Natural Products Research and Development, College of Biology and Pharmacy, China Three Gorges University, Yichang, Hubei 443002, China
| | - Nian-Yu Huang
- Hubei Key Laboratory of Natural Products Research and Development, College of Biology and Pharmacy, China Three Gorges University, Yichang, Hubei 443002, China
| | - Kun Zou
- Hubei Key Laboratory of Natural Products Research and Development, College of Biology and Pharmacy, China Three Gorges University, Yichang, Hubei 443002, China
| | - Long Wang
- Key laboratory of inorganic nonmetallic crystalline and energy conversion materials, College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China
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