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Zafar A, Iqbal MA, Iram G, Shoukat US, Jamil F, Saleem M, Yousif M, Abidin ZU, Asad M. Advances in organocatalyzed synthesis of organic compounds. RSC Adv 2024; 14:20365-20389. [PMID: 38919284 PMCID: PMC11197984 DOI: 10.1039/d4ra03046j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Accepted: 06/17/2024] [Indexed: 06/27/2024] Open
Abstract
The recent advancements in utilizing organocatalysts for the synthesis of organic compounds have been described in this review by focusing on their simplicity, effectiveness, reproducibility, and high selectivity which lead to excellent product yields. The organocatalytic methods for various derivatives, such as indoles, pyrazolones, anthrone-functionalized benzylic amines, maleimide, polyester, phthalimides, dihydropyrimidin, heteroaryls, N-aryl benzimidazoles, stilbenoids, quinazolines, quinolines, and oxazolidinones have been specifically focused. The review provides more understanding by delving into potential reaction mechanisms. We anticipate that this collection of data and findings on successful synthesis of diverse compound derivatives will serve as valuable resources and stimulating current and future research efforts in organocatalysis and industrial chemistry.
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Affiliation(s)
- Ayesha Zafar
- Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
| | - Muhammad Adnan Iqbal
- Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
- Organometallic and Coordination Chemistry Laboratory, Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
| | - Ghazala Iram
- Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
| | - Umar Sohail Shoukat
- Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
| | - Faisal Jamil
- Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
| | - Muhammad Saleem
- Department of Basic and Applied Chemistry, Faculty of Sciences and Technology, University of Central Punjab Lahore Pakistan
| | - Muhammad Yousif
- Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
| | - Zain Ul Abidin
- Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
| | - Mohammad Asad
- Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University P.O. Box 80203 Jeddah 21589 Saudi Arabia
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2
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Hernández-Ruiz R, Gómez-Gil S, Pedrosa MR, Suárez-Pantiga S, Sanz R. Direct synthesis of haloaromatics from nitroarenes via a sequential one-pot Mo-catalyzed reduction/Sandmeyer reaction. Org Biomol Chem 2023; 21:7791-7798. [PMID: 37706648 DOI: 10.1039/d3ob01187a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
Herein, we report the direct synthesis of a wide variety of functionalized aromatic bromides, chlorides, iodides, and fluorides from nitroarenes in a sequential one-pot operation. This protocol is based on an air- and moisture-tolerant dioxomolybdenum-catalyzed reduction of nitroaromatics, employing pinacol as a reducing agent, which enables subsequent diazotization and halogenation steps. This methodology represents a step-economical, practical, and alternative procedure for synthesizing haloaromatics directly from nitroaromatics.
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Affiliation(s)
- Raquel Hernández-Ruiz
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain.
| | - Sara Gómez-Gil
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain.
| | - María R Pedrosa
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain.
| | - Samuel Suárez-Pantiga
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain.
| | - Roberto Sanz
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain.
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3
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Zheng L, Mei W, Zou X, Zhong Y, Wu Y, Deng L, Wang Y, Yang B, Guo W. DBU-Promoted Deaminative Thiolation of 1 H-Benzo[ d]imidazol-2-amines and Benzo[ d]oxazol-2-amines. J Org Chem 2023; 88:272-284. [PMID: 36521048 DOI: 10.1021/acs.joc.2c02297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A facile and efficient catalyst-/metal-/oxidant-free DBU-promoted deaminative thiolation reaction of 1H-benzo[d]imidazol-2-amines and benzo[d]oxazol-2-amines has been developed at room temperature conditions in a one-pot protocol. This practical three-component strategy represents a novel and environmentally friendly reaction pathway toward the straightforward synthesis of various 2-thio-1H-benzo[d]imidazoles and 2-thiobenzo[d]oxazoles using carbon disulfide as a sulfur source through C-N bond cleavage and C-S bond formation process. Different types of 1H-benzo[d]imidazol-2-amines, benzo[d]oxazol-2-amines, and organic bromides are suitable substrates. The gram-scale and late-stage modification experiments provide the potential applications based on this methodology in the field of organic and medicinal chemistry.
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Affiliation(s)
- Lvyin Zheng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Weijie Mei
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Xiaoying Zou
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Yumei Zhong
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Yingying Wu
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Lei Deng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Yihan Wang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Beining Yang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Wei Guo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
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4
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Wang T, Liu C, Xu D, Xu J, Yang Z. Iridium-Catalyzed and pH-Dependent Reductions of Nitroalkenes to Ketones. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227822. [PMID: 36431923 PMCID: PMC9696932 DOI: 10.3390/molecules27227822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/10/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022]
Abstract
A highly chemoselective conversion of α,β-disubstituted nitroalkenes to ketones is developed. An acid-compatible iridium catalyst serves as the key to the conversion. At a 2500 S/C ratio, nitroalkenes were readily converted to ketones in up to 72% isolated yields. A new mechanistic mode involving the reduction of nitroalkene to nitrosoalkene and N-alkenyl hydroxylamine is proposed. This conversion is ready to amplify to a gram-scale synthesis. The pH value plays an indispensable role in controlling the chemoselectivity.
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Rigo D, Masters AF, Maschmeyer T, Selva M, Fiorani G. Isopropenyl Esters (iPEs) in Green Organic Synthesis. Chemistry 2022; 28:e202200431. [DOI: 10.1002/chem.202200431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Davide Rigo
- Department of Molecular Sciences and Nanosystems Ca' Foscari University of Venice Via Torino 155 30172 Venezia (VE) Italy
| | - Anthony F. Masters
- Laboratory of Advanced Catalysis for Sustainability School of Chemistry University of Sydney Sydney NSW 2006 Australia
| | - Thomas Maschmeyer
- Laboratory of Advanced Catalysis for Sustainability School of Chemistry University of Sydney Sydney NSW 2006 Australia
| | - Maurizio Selva
- Department of Molecular Sciences and Nanosystems Ca' Foscari University of Venice Via Torino 155 30172 Venezia (VE) Italy
| | - Giulia Fiorani
- Department of Molecular Sciences and Nanosystems Ca' Foscari University of Venice Via Torino 155 30172 Venezia (VE) Italy
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Lyons DJM, Dinh AH, Ton NNH, Crocker RD, Mai BK, Nguyen TV. Ring Contraction of Tropylium Ions into Benzenoid Derivatives. Org Lett 2022; 24:2520-2525. [PMID: 35324211 DOI: 10.1021/acs.orglett.2c00663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a method to convert substituted tropylium ions into benzenoid derivatives.
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Affiliation(s)
- Demelza J M Lyons
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - An H Dinh
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Nhan N H Ton
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Reece D Crocker
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Thanh Vinh Nguyen
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
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7
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Sakkani N, Jakkampudi S, Sadiq N, Zhao JC. Synthesis of α‐Sulfonyl Ketones through a Salicylic Acid‐Catalyzed Multicomponent Reaction Involving Arylsulfonation and Oxidation. ChemistrySelect 2021. [DOI: 10.1002/slct.202104138] [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)
- Nagaraju Sakkani
- Department of Chemistry University of Texas at San Antonio One UTSA Circle San Antonio Texas 78249-0698 USA
| | - Satish Jakkampudi
- Department of Chemistry University of Texas at San Antonio One UTSA Circle San Antonio Texas 78249-0698 USA
| | - Nouraan Sadiq
- Department of Chemistry University of Texas at San Antonio One UTSA Circle San Antonio Texas 78249-0698 USA
| | - John C.‐G. Zhao
- Department of Chemistry University of Texas at San Antonio One UTSA Circle San Antonio Texas 78249-0698 USA
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Venkatesh R, Singh AK, Lee YR, Kandasamy J. Palladium-catalyzed synthesis of α-aryl acetophenones from styryl ethers and aryl diazonium salts via regioselective Heck arylation at room temperature. Org Biomol Chem 2021; 19:7832-7837. [PMID: 34549234 DOI: 10.1039/d1ob01503f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Preparation of α-aryl acetophenones from styryl ethers and aryldiazonium salts is described. The reaction is catalyzed by palladium acetate at room temperature in the absence of ligand and base. The developed method is highly attractive in terms of reaction conditions, substrate scope, functional group tolerance and yields. Synthetic applications of the present method are demonstrated by preparing α-aryl indoles and 3-aryl isocoumarin from styryl ethers.
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Affiliation(s)
- Rapelly Venkatesh
- Department of chemistry, Indian Institute of Technology (BHU), Varanasi, Uttar Pradesh-221005.
| | - Adesh Kumar Singh
- Department of chemistry, Indian Institute of Technology (BHU), Varanasi, Uttar Pradesh-221005.
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541 Republic of Korea
| | - Jeyakumar Kandasamy
- Department of chemistry, Indian Institute of Technology (BHU), Varanasi, Uttar Pradesh-221005.
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9
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Terlizzi L, Cola I, Raviola C, Fagnoni M, Protti S. Dyedauxiliary Group Strategy for the α-Functionalization of Ketones and Esters. ACS ORGANIC & INORGANIC AU 2021; 1:68-71. [PMID: 36855752 PMCID: PMC9954345 DOI: 10.1021/acsorginorgau.1c00020] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The synthesis of α-arylketones and α-arylazo esters has been achieved in mixed organic-aqueous media under photocatalyst- and metal-free conditions via visible light activation of arylazo sulfones in the presence of enol silyl ethers and ketene silyl acetals, respectively. The process took place efficiently and exhibits an excellent tolerance for a broad variety of functional groups.
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10
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Bouquin M, Jaroschik F, Taillefer M. Versatile and base-free copper-catalyzed α-arylations of aromatic ketones using diaryliodonium salts. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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11
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Synthesis of α-sulfonyl ketoximes through a salicylic acid-catalyzed four-component reaction involving radical sulfonylation followed by arylsulfonylation and oximation. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153229] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Crystalline salicylic acid as an efficient catalyst for ultrafast Paal–Knorr pyrrole synthesis under microwave induction. J CHEM SCI 2021. [DOI: 10.1007/s12039-021-01891-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Abstract
A protocol for photoinduced cross-coupling of aryl iodides having polar π-functional groups or elongated π-conjugation with alkenes has been developed. The radical cascade mechanism involving generation of aryl radicals via C-I bond homolysis of photoexcited aryl iodides and their subsequent addition to alkenes is proposed. The method enables iodide-selective cross-coupling over other halogen leaving groups with functional group compatibility on both arene and alkene motifs.
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Affiliation(s)
- Yuliang Liu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Haoyu Li
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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14
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Bugaenko DI, Volkov AA, Karchava AV, Yurovskaya MA. Generation of aryl radicals by redox processes. Recent progress in the arylation methodology. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4959] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Arylation methods based on the generation and use of aryl radicals have been a rapidly growing field of research in recent years and currently represent a powerful strategy for carbon – carbon and carbon – heteroatom bond formation. The progress in this field is related to advances in the methods for generation of aryl radicals. The currently used aryl radical precursors include aryl halides, aryldiazonium and diaryliodonium salts, arylcarboxylic acids and their derivatives, arylboronic acids, arylhydrazines, organosulfur(II, VI) compounds and some other compounds. Aryl radicals are generated under mild conditions by single electron reduction or oxidation of precursors induced by conventional reagents, visible light or electric current. A crucial role in the development of the radical arylation methodology belongs to photoredox processes either catalyzed by transition metal complexes or organic dyes or proceeding without catalysts. Unlike the conventional transition metal-catalyzed arylation methods, radical arylation reactions proceed very often at room temperature and have high functional group tolerance. Without claiming to be exhaustive, this review covers the most important advances of the current decade in the generation and synthetic applications of (het)aryl radicals. Examples of reactions are given and mechanistic insights are highlighted.
The bibliography includes 341 references.
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15
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Estruch-Blasco M, Felipe-Blanco D, Bosque I, Gonzalez-Gomez JC. Radical Arylation of Triphenyl Phosphite Catalyzed by Salicylic Acid: Mechanistic Investigations and Synthetic Applications. J Org Chem 2020; 85:14473-14485. [PMID: 32419452 DOI: 10.1021/acs.joc.0c00795] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A straightforward and scalable methodology to synthesize diphenyl arylphosphonates at 20 °C within 1-2 h is reported using inexpensive SA as the catalytic promoter of the reaction. Mechanistic investigations suggest that the reaction proceeds via radical-radical coupling, consistent with the so-called persistent radical effect. The reaction tolerated a wide range of functional groups and heteroaromatic moieties. The synthetic usefulness and the unique reactivity of the obtained phosphonates were demonstrated in different one-step transformations.
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Affiliation(s)
- Manel Estruch-Blasco
- Instituto de Sı́ntesis Orgánica (ISO) and Departamento de Quı́mica Orgánica, Facultad de Ciencias, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain
| | - Diego Felipe-Blanco
- Instituto de Sı́ntesis Orgánica (ISO) and Departamento de Quı́mica Orgánica, Facultad de Ciencias, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain
| | - Irene Bosque
- Instituto de Sı́ntesis Orgánica (ISO) and Departamento de Quı́mica Orgánica, Facultad de Ciencias, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain
| | - Jose C Gonzalez-Gomez
- Instituto de Sı́ntesis Orgánica (ISO) and Departamento de Quı́mica Orgánica, Facultad de Ciencias, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain
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16
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Liu Q, Wang R, Song H, Liu Y, Wang Q. Synthesis of 1,4‐Dicarbonyl Compounds by Visible‐Light‐Mediated Cross‐Coupling Reactions of α‐Chlorocarbonyls and Enol Acetates. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000791] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qiang Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Rui‐Guo Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Hong‐Jian Song
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Yu‐Xiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Qing‐Min Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin Tianjin 300071 People's Republic of China
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Sun Z, Chen W, Qian B, Wang L, Yu B, Chen Q, He M, Zhang Z. UiO‐66 microcrystals catalyzed direct arylation of enol acetates and heteroarenes with aryl diazonium salts in water. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5482] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Zhong‐Hua Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou 213164 China
| | - Wang Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou 213164 China
| | - Bing‐Bing Qian
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou 213164 China
| | - Liang Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou 213164 China
| | - Binxun Yu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou 213164 China
| | - Qun Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou 213164 China
| | - Ming‐Yang He
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou 213164 China
| | - Zhi‐Hui Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou 213164 China
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18
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Felipe-Blanco D, Gonzalez-Gomez JC. Metal-Free Arylation-Lactonization Sequence of γ
-Alkenoic Acids Using Anilines as Aryl Radical Precursors. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901679] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Diego Felipe-Blanco
- Instituto de Síntesis Orgánica (ISO) y Departamento de Química Orgánica; Universidad de Alicante; Apdo. 99 03080 Alicante Spain
| | - Jose C. Gonzalez-Gomez
- Instituto de Síntesis Orgánica (ISO) y Departamento de Química Orgánica; Universidad de Alicante; Apdo. 99 03080 Alicante Spain
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19
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Cheng P, Wang W, Wang L, Zeng J, Reiser O, Liang Y. Ag2CO3-mediated direct functionalization of alkyl nitriles: Facile synthesis of γ-ketonitriles through nitrile alkylation of enol acetates. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.04.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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20
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Mosallanezhad A, Kiyani H. Green Synthesis of 3-Substituted-4-arylmethylideneisoxazol-5(4H)-one Derivatives Catalyzed by Salicylic Acid. CURRENT ORGANOCATALYSIS 2019. [DOI: 10.2174/2213337206666190214161332] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
4-Arylmethylideneisoxazol-5(4H)-ones are a class of organic compounds
with a variety of applications in the agriculture, filter dyes, photonic devices, and pharmaceutical industries.
They are also used as synthetic precursors for the synthesis of other organic compounds. As
a result, efforts are being made to search new and available catalyst and green methods toward their
synthesis.
Objective:
The aim of this work is to investigate the catalytic activity of salicylic acid as an inexpensive,
easy to handle, and safe catalyst to synthesis of some derivatives of isoxazole-5(4H)-ones in
water medium.
Methods:
To aqueous solution of equal amounts of aryl/heteroaryl aldehydes, β-ketoesters, and hydroxylamine
hydrochloride; salicylic acid (15 mol%) was added and the reaction mixture was stirred
at room temperature for a specified periods. The precipitated product was filtered and washed with
water to obtain 3-substituted-4-arylmethylideneisoxazol-5(4H)-ones. The reaction conditions were
also optimized and extended to synthesis other isoxazol-5(4H)-ones.
Results:
The salicylic acid is found to possess acceptable catalytic activity for the promotion of
three-component cyclocondensation of aryl/heteroaryl aldehydes, β-ketoesters, and hydroxylamine
hydrochloride. The three-component reaction led to construction of 3-substituted-4-arylmethylideneisoxazol-
5(4H)-ones in good to high isolated reaction yields.
Conclusion:
The efficient and environmental friendliness procedure for the synthesis of isoxazol-
5(4H)-ones is introduced. The reaction also carried out smoothly in water as a cost-effective, simple,
green, and non-toxic solvent at room temperature without using heating, microwave, and ultrasound
sources.
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Affiliation(s)
| | - Hamzeh Kiyani
- School of Chemistry, Damghan University, Damghan, Iran
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21
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Wang L, Cheng P, Wang X, Wang W, Zeng J, Liang Y, Reiser O. Visible-light promoted sulfonamidation of enol acetates to α-amino ketones based on redox-neutral photocatalysis. Org Chem Front 2019. [DOI: 10.1039/c9qo01119f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible-light mediated photoredox-catalyzed sulfonamidation of enol acetates to α-amino ketones has been developed. The process features mild and operationally simple reaction conditions and does not require an external oxidant.
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Affiliation(s)
- Lin Wang
- Key Laboratory of Traditional Chinese Veterinary Medicine of Hunan Province
- Hunan Agricultural University
- Changsha
- China
| | - Pi Cheng
- Key Laboratory of Traditional Chinese Veterinary Medicine of Hunan Province
- Hunan Agricultural University
- Changsha
- China
| | - Xinhao Wang
- Key Laboratory of Traditional Chinese Veterinary Medicine of Hunan Province
- Hunan Agricultural University
- Changsha
- China
| | - Wei Wang
- Key Laboratory of Traditional Chinese Veterinary Medicine of Hunan Province
- Hunan Agricultural University
- Changsha
- China
| | - Jianguo Zeng
- Key Laboratory of Traditional Chinese Veterinary Medicine of Hunan Province
- Hunan Agricultural University
- Changsha
- China
| | - Yun Liang
- Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province
- Hunan Normal University
- Changsha
- China
| | - Oliver Reiser
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
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