1
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Huang J, Li X, Liu P, Wei Y, Liu S, Ma X. Selective Oxidative Cleavage of Benzyl C-N Bond under Metal-Free Electrochemical Conditions. Molecules 2024; 29:2851. [PMID: 38930916 PMCID: PMC11206264 DOI: 10.3390/molecules29122851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 06/13/2024] [Accepted: 06/13/2024] [Indexed: 06/28/2024] Open
Abstract
With the growing significance of green chemistry in organic synthesis, electrochemical oxidation has seen rapid development. Compounds undergo oxidation-reduction reactions through electron transfer at the electrode surface. This article proposes the use of electrochemical methods to achieve cleavage of the benzyl C-N bond. This method selectively oxidatively cleaves the C-N bond without the need for metal catalysts or external oxidants. Additionally, primary, secondary, and tertiary amines exhibit good adaptability under these conditions, utilizing water as the sole source of oxygen.
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Affiliation(s)
- Jiawei Huang
- State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China; (J.H.); (X.L.); (P.L.); (Y.W.)
| | - Xiaoman Li
- State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China; (J.H.); (X.L.); (P.L.); (Y.W.)
| | - Ping Liu
- State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China; (J.H.); (X.L.); (P.L.); (Y.W.)
| | - Yu Wei
- State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China; (J.H.); (X.L.); (P.L.); (Y.W.)
| | - Shuai Liu
- Bingtuan Energy Development Institute, Shihezi University, Shihezi 832003, China
| | - Xiaowei Ma
- State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China; (J.H.); (X.L.); (P.L.); (Y.W.)
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2
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Chiang CW, Li HL, Lin TJ, Chen HC, Chou YH, Chou CJ. Versatile Synthesis of Symmetric and Unsymmetric Imines via Photoelectrochemical Catalysis: Application to N-Terminal Modification of Phenylalanine. Chemistry 2023; 29:e202301379. [PMID: 37434348 DOI: 10.1002/chem.202301379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/21/2023] [Accepted: 07/11/2023] [Indexed: 07/13/2023]
Abstract
A strategy that combines electrochemical synthesis and photoredox catalysis was reported for the efficient synthesis of imines. This approach was demonstrated to be highly versatile in producing various types of imines, including symmetric and unsymmetric imines, by exploring the impact of different substituents on the benzene ring of the arylamine. Additionally, the method was specifically applied to modify N-terminal phenylalanine residues and was found to be successful in the photoelectrochemical cross-coupling reaction between NH2 -Phe-OMe and aryl methylamines, leading to the synthesis of phenylalanine-containing imines. Therefore, this technique would present a convenient and efficient platform for synthesizing imines, with promising applications in chemical biology, drug development, and organic synthesis.
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Affiliation(s)
- Chien-Wei Chiang
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
| | - Hung-Li Li
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
| | - Ting-Jun Lin
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
| | - Hung-Chi Chen
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
| | - Yi-Hsien Chou
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
| | - Chih-Ju Chou
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
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3
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Liu Y, Tang M, Lai Y, Huang W, Tang Y. Site-Selective Oxidative Coupling Reaction of Diamines toward Aminoazo Compounds. Org Lett 2023; 25:1061-1065. [PMID: 36779577 DOI: 10.1021/acs.orglett.2c04242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
A selective oxidative coupling reaction of a diamine containing both C- and N-NH2 was achieved using acidic potassium permanganate as the coupling reagent. The reaction conditions were optimized, and the reaction selectivity was illustrated by quantum calculations. Furthermore, the azo-coupled product was derivatized to four nitroamine energetic materials with excellent detonation performances.
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Affiliation(s)
- Yuji Liu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Mingjie Tang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yuan Lai
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Wei Huang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yongxing Tang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
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4
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Metal-free oxidative radical arylation of styrene with anilines to access 2-arylacetophenones and selective oxidation of amine. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.134995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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5
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Govada GV, Sabbasani RR. A new outlook in oxidative transformations and coupling reactions via in situ generation of organic chloramines. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Satta G, Usala E, Solinas A, Römer M, Livesi M, Pira GM, Beccu A, Carboni S, Gaspa S, De Luca L, Pisano L, Azzena U, Carraro M. Nenitzescu Synthesis of 5‐Hydroxyindoles with Zinc, Iron and Magnesium Salts in Cyclopentyl Methyl Ether. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Giuseppe Satta
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC) Via Celso Ulpiani 27 70126 Bari Italy
| | - Elena Usala
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
| | - Angelo Solinas
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
| | - Melina Römer
- Department of Chemistry, Clemens-Schöpf Institute of Chemistry Technische Universität Darmstadt 64287 Darmstadt Germany
| | - Marco Livesi
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
| | - Giovanni Michele Pira
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
| | - Andrea Beccu
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC) Via Celso Ulpiani 27 70126 Bari Italy
| | - Silvia Carboni
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
| | - Silvia Gaspa
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
| | - Lidia De Luca
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
| | - Luisa Pisano
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC) Via Celso Ulpiani 27 70126 Bari Italy
| | - Ugo Azzena
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC) Via Celso Ulpiani 27 70126 Bari Italy
| | - Massimo Carraro
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari Via Vienna 2 07100 Sassari Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC) Via Celso Ulpiani 27 70126 Bari Italy
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7
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Kumar I, Kumar R, Gupta SS, Sharma U. C 70 Fullerene Catalyzed Photoinduced Aerobic Oxidation of Benzylamines to Imines and Aldehydes. J Org Chem 2021; 86:6449-6457. [PMID: 33886326 DOI: 10.1021/acs.joc.1c00297] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
C70 fullerene catalyzed photoinduced oxidation of benzylic amines at ambient conditions has been explored here. The developed strategy's main feature includes the additive/oxidant-free conversion of benzylic amine to corresponding imine and aldehydes. The reaction manifests broad substrate scope with excellent function group leniency and is applicable up to the gram scale. Further, symmetrical secondary amines can also be synthesized from benzylic amine in a one-pot two-step process. Various experiments and density functional theory studies revealed that the current reaction involves the generation of reactive oxygen species, single electron transfer reaction, and benzyl radical formation as key steps under photocatalytic conditions.
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Affiliation(s)
- Inder Kumar
- Chemical Technology Division, CSIR-Institute of Himalayan Bioresource and Technology, Palampur 176061, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rakesh Kumar
- Chemical Technology Division, CSIR-Institute of Himalayan Bioresource and Technology, Palampur 176061, India
| | - Shiv Shankar Gupta
- Chemical Technology Division, CSIR-Institute of Himalayan Bioresource and Technology, Palampur 176061, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Upendra Sharma
- Chemical Technology Division, CSIR-Institute of Himalayan Bioresource and Technology, Palampur 176061, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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8
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Ramavath V, Rupanawar BD, More SG, Bansode AH, Suryavanshi G. Hypervalent iodine( iii) induced oxidative olefination of benzylamines using Wittig reagents. NEW J CHEM 2021. [DOI: 10.1039/d1nj01170g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We have developed hypervalent iodine mediated oxidative olefination of 1° and 2° amines using 2C-Wittig reagents for the synthesis of α,β-unsaturated esters.
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Affiliation(s)
- Vijayalakshmi Ramavath
- Chemical Engineering & Process Development Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Bapurao D. Rupanawar
- Chemical Engineering & Process Development Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Satish G. More
- Chemical Engineering & Process Development Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Ajay H. Bansode
- Chemical Engineering & Process Development Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Gurunath Suryavanshi
- Chemical Engineering & Process Development Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
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9
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Grace Victoria G, Rajasekhara Reddy S. Recent advances in the synthesis of organic chloramines and their insights into health care. NEW J CHEM 2021. [DOI: 10.1039/d1nj01086g] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Organic nitrogen–chlorine compounds and their derivatives are important heterocyclic motifs, exhibiting applications such as N-chlorinating agents, analytical reagents, disinfectants, antipathogens, and as synthetic intermediates for drugs, polymers, and natural products.
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Affiliation(s)
- G. Grace Victoria
- Department of Chemistry
- Vellore Institute of Technology (VIT)
- Vellore 632014
- India
- Department of Chemistry
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10
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Nie X, Zheng Y, Ji L, Fu H, Chen H, Li R. Acceptorless dehydrogenation of amines to nitriles catalyzed by N-heterocyclic carbene-nitrogen-phosphine chelated bimetallic ruthenium (II) complex. J Catal 2020. [DOI: 10.1016/j.jcat.2020.09.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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11
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Nandi J, Vaughan MZ, Sandoval AL, Paolillo JM, Leadbeater NE. Oxidative Amidation of Amines in Tandem with Transamidation: A Route to Amides Using Visible-Light Energy. J Org Chem 2020; 85:9219-9229. [PMID: 32539393 DOI: 10.1021/acs.joc.0c01222] [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
A methodology is reported for preparing amides using amines as an acyl source. The protocol involves the visible-light-promoted oxidative amidation of amines with pyrazole to synthesize N-acyl pyrazoles followed by transamidation. By combining photoredox catalysis with oxoammonium cations in the presence of sodium persulfate as a terminal oxidant, the N-acyl pyrazoles could be prepared efficiently and effectively using blue LEDs. The transamidation step was performed without the need to purify the N-acyl pyrazole intermediate, and a range of amides were generated in good to excellent yields.
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Affiliation(s)
- Jyoti Nandi
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Matthew Z Vaughan
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Arturo León Sandoval
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Joshua M Paolillo
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Nicholas E Leadbeater
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
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12
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Synthesis of novel isoindolone derivatives via cascade reactions. Contrasting diastereoselectivity under solution-phase vis-a-vis solvent-free ball-milling reaction conditions. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130594] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Porcheddu A, Delogu F, De Luca L, Fattuoni C, Colacino E. Metal-free mechanochemical oxidations in Ertalyte ® jars. Beilstein J Org Chem 2019; 15:1786-1794. [PMID: 31435450 PMCID: PMC6664414 DOI: 10.3762/bjoc.15.172] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 07/05/2019] [Indexed: 02/03/2023] Open
Abstract
Aimed at eliminating or at least significantly reducing the use of solvents, sodium hypochlorite pentahydrate crystals (NaOCl·5H2O) in the presence of a catalytic amount of a nitrosyl radical (TEMPO or AZADO) have been successfully used to induce mechanochemical oxidative processes on several structurally different primary and secondary alcohols. The proposed redox process is safe, inexpensive and performing effectively, especially on the macroscale. Herein, an Ertalyte® jar has been successfully used, for the first time, in a mechanochemical process.
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Affiliation(s)
- Andrea Porcheddu
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS 554 bivio per Sestu, 09042 Monserrato (Ca), Italy
| | - Francesco Delogu
- Dipartimento di Ingegneria Meccanica, Chimica e dei Materiali, Università degli Studi di Cagliari, via Marengo 2, 09123 Cagliari, Italy
| | - Lidia De Luca
- Dipartimento di Chimica e Farmacia, Università degli Studi di Sassari, via Vienna 2, 07100-Sassari, Italy
| | - Claudia Fattuoni
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS 554 bivio per Sestu, 09042 Monserrato (Ca), Italy
| | - Evelina Colacino
- Université de Montpellier & Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253 CNRS – UM – ENSCM, 8 Rue de l’Ecole Normale, 34296 Montpellier, Cedex 5, France
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14
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Kim J, Golime G, Kim HY, Oh K. Copper(II)‐Catalyzed Aerobic Oxidation of Amines: Divergent Reaction Pathways by Solvent Control to Imines and Nitriles. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900302] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Jihyeon Kim
- Center for Metareceptome Research, College of PharmacyChung-Ang University 84 Heukseok-ro, Dongjak Seoul 06974 Republic of Korea
| | - Gangadhararao Golime
- Center for Metareceptome Research, College of PharmacyChung-Ang University 84 Heukseok-ro, Dongjak Seoul 06974 Republic of Korea
| | - Hun Young Kim
- Center for Metareceptome Research, College of PharmacyChung-Ang University 84 Heukseok-ro, Dongjak Seoul 06974 Republic of Korea
| | - Kyungsoo Oh
- Center for Metareceptome Research, College of PharmacyChung-Ang University 84 Heukseok-ro, Dongjak Seoul 06974 Republic of Korea
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15
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Gaspa S, Carraro M, Pisano L, Porcheddu A, De Luca L. Trichloroisocyanuric Acid: a Versatile and Efficient Chlorinating and Oxidizing Reagent. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900449] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Silvia Gaspa
- Dipartimento di Chimica e Farmacia; Università degli Studi di Sassari; Via Vienna 2 07100 Sassari Italy
| | - Massimo Carraro
- Dipartimento di Chimica e Farmacia; Università degli Studi di Sassari; Via Vienna 2 07100 Sassari Italy
| | - Luisa Pisano
- Dipartimento di Chimica e Farmacia; Università degli Studi di Sassari; Via Vienna 2 07100 Sassari Italy
| | - Andrea Porcheddu
- Dipartimento di Scienze Chimiche e Geologiche; Università degli Studi di Cagliari; Cittadella Universitaria 09042 Monserrato Italy
| | - Lidia De Luca
- Dipartimento di Chimica e Farmacia; Università degli Studi di Sassari; Via Vienna 2 07100 Sassari Italy
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16
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Jin C, Wang F, Sun B, Zhuang X. A Practical Oxidative Conversion of Aldehydes into N-Chloroaldimines. JOURNAL OF CHEMICAL RESEARCH 2018. [DOI: 10.3184/174751918x15403084696731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A novel method for the preparation of N-chloroaldimines from commonly available aromatic aldehydes has been developed. The reaction proceeded effectively by two steps: aldehydes were initially transformed into imines and then chloro-substitution with NaClO2 gave the N-chloroaldimines. This simple protocol allows for the preparation of a variety of aromatic N-chloroaldimines in moderate to excellent yields without the isolation of the imine intermediate. We also found that 3-nitrobenzaldehyde and 4-cyanobenzaldehyde were converted into the related benzonitrile directly under the standard conditions.
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Affiliation(s)
- Can Jin
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Feng Wang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Bin Sun
- Collaborative Innovation Centre of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Xiaohui Zhuang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
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17
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Gaspa S, Valentoni A, Mulas G, Porcheddu A, De Luca L. Metal‐Free Preparation of α‐H‐Chlorinated Alkylaromatic Hydrocarbons by Sunlight. ChemistrySelect 2018. [DOI: 10.1002/slct.201801168] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Silvia Gaspa
- Dipartimento di Chimica e FarmaciaUniversità degli Studi di Sassari Via Vienna 2 07100, Sassari Italy
| | - Antonio Valentoni
- Dipartimento di Chimica e FarmaciaUniversità degli Studi di Sassari Via Vienna 2 07100, Sassari Italy
| | - Gabriele Mulas
- Dipartimento di Chimica e FarmaciaUniversità degli Studi di Sassari Via Vienna 2 07100, Sassari Italy
| | - Andrea Porcheddu
- Dipartimento di Scienze Chimiche e GeologicheUniversità degli Studi di CagliariCittadella Universitaria 09042 Monserrato Italy
| | - Lidia De Luca
- Dipartimento di Chimica e FarmaciaUniversità degli Studi di Sassari Via Vienna 2 07100, Sassari Italy
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18
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Aqueous mortar–pestle grinding: An efficient, attractive, and viable technique for the regioselective synthesis of β-amino alcohols. CR CHIM 2018. [DOI: 10.1016/j.crci.2017.11.004] [Citation(s) in RCA: 4] [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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19
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Galletti P, Martelli G, Prandini G, Colucci C, Giacomini D. Sodium periodate/TEMPO as a selective and efficient system for amine oxidation. RSC Adv 2018; 8:9723-9730. [PMID: 35540807 PMCID: PMC9078700 DOI: 10.1039/c8ra01365a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 03/01/2018] [Indexed: 01/02/2023] Open
Abstract
A new metal-free protocol for promoting oxidation of amines in aqueous-organic medium was developed. NaIO4 and TEMPO as the catalyst emerged as the most efficient and selective system for oxidation of differently substituted benzyl amines to the corresponding benzaldehydes without overoxidation. Unsymmetrical secondary amines underwent selective oxidation only at the benzylic position thus realising an oxidative deprotection of a benzylic group with an easy amine recovery. NaIO4/TEMPO efficiently allowed a metal-free oxidation of benzylamines to benzaldehydes with complete selectivity for N-benzyl residues in secondary amines.![]()
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Affiliation(s)
- P. Galletti
- Department of Chemistry “G. Ciamician” University of Bologna
- Bologna 40126
- Italy
| | - G. Martelli
- Department of Chemistry “G. Ciamician” University of Bologna
- Bologna 40126
- Italy
| | - G. Prandini
- Department of Chemistry “G. Ciamician” University of Bologna
- Bologna 40126
- Italy
| | - C. Colucci
- Department of Chemistry “G. Ciamician” University of Bologna
- Bologna 40126
- Italy
| | - D. Giacomini
- Department of Chemistry “G. Ciamician” University of Bologna
- Bologna 40126
- Italy
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20
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Bansode AH, Suryavanshi G. Metal-free hypervalent iodine/TEMPO mediated oxidation of amines and mechanistic insight into the reaction pathways. RSC Adv 2018; 8:32055-32062. [PMID: 35547530 PMCID: PMC9086218 DOI: 10.1039/c8ra07451h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 09/08/2018] [Indexed: 01/06/2023] Open
Abstract
A highly efficient metal free approach for the oxidation of primary and secondary amines to their corresponding aldehydes and ketones using PhI(OAc)2 in combination with a catalytic amount of TEMPO as an oxidizing agent is described. This protocol is rapid and provides diverse products under milder reaction conditions in excellent yields. In addition, the mechanistic study is well demonstrated by spectroscopic methods. A highly efficient, metal free rapid protocol studied mechanistically the oxidation of primary and secondary amines to their corresponding carbonyl compounds using PhI(OAc)2 and catalytic TEMPO to provide diverse products in excellent yields.![]()
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Affiliation(s)
- Ajay H. Bansode
- Chemical Engineering & Process Development Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Gurunath Suryavanshi
- Chemical Engineering & Process Development Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
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Mocci R, Murgia S, De Luca L, Colacino E, Delogu F, Porcheddu A. Ball-milling and cheap reagents breathe green life into the one hundred-year-old Hofmann reaction. Org Chem Front 2018. [DOI: 10.1039/c7qo01006k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A very efficient mechanically activated synthesis of isocyanides directly from primary amines and without extra-solvent addition has been reported.
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Affiliation(s)
- Rita Mocci
- Università degli Studi di Cagliari
- Dipartimento di Scienze Chimiche e Geologiche
- 09042 Monserrato
- Italy
| | - Sergio Murgia
- Università degli Studi di Cagliari
- Dipartimento di Scienze Chimiche e Geologiche
- 09042 Monserrato
- Italy
| | - Lidia De Luca
- Università degli Studi di Sassari
- Dipartimento di Chimica e Farmacia
- 07100 Sassari
- Italy
| | - Evelina Colacino
- Università degli Studi di Cagliari
- Dipartimento di Scienze Chimiche e Geologiche
- 09042 Monserrato
- Italy
- Institut des Biomolécules Max Mousseron
| | - Francesco Delogu
- Università degli Studi di Cagliari
- Dipartimento di Ingegneria Meccanica
- Chimica
- e dei Materiali
- Cagliari
| | - Andrea Porcheddu
- Università degli Studi di Cagliari
- Dipartimento di Scienze Chimiche e Geologiche
- 09042 Monserrato
- Italy
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Porcheddu A, Colacino E, Cravotto G, Delogu F, De Luca L. Mechanically induced oxidation of alcohols to aldehydes and ketones in ambient air: Revisiting TEMPO-assisted oxidations. Beilstein J Org Chem 2017; 13:2049-2055. [PMID: 29062426 PMCID: PMC5647725 DOI: 10.3762/bjoc.13.202] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 09/28/2017] [Indexed: 01/27/2023] Open
Abstract
The present work addresses the development of an eco-friendly and cost-efficient protocol for the oxidation of primary and secondary alcohols to the corresponding aldehydes and ketones by mechanical processing under air. Ball milling was shown to promote the quantitative conversion of a broad set of alcohols into carbonyl compounds with no trace of an over-oxidation to carboxylic acids. The mechanochemical reaction exhibited higher yields and rates than the classical, homogeneous, TEMPO-based oxidation.
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Affiliation(s)
- Andrea Porcheddu
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS 554 bivio per Sestu, 09028 Monserrato (Ca), Italy
| | - Evelina Colacino
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS 554 bivio per Sestu, 09028 Monserrato (Ca), Italy.,Institut des Biomolécules Max Mousseron (IBMM) UMR5247 CNRS-UM-ENSCM, Université de Montpellier, Place Eugène Bataillon, cc1703, 34095 Montpellier Cedex 05, France
| | - Giancarlo Cravotto
- Dipartimento di Scienza e Tecnologia del Farmaco, University of Turin, Via P. Giuria, 9, 10125 Turin, Italy
| | - Francesco Delogu
- Dipartimento di Ingegneria Meccanica, Chimica e dei Materiali, Università degli Studi di Cagliari, via Marengo 3, 09123 Cagliari, Italy
| | - Lidia De Luca
- Dipartimento di Chimica e Farmacia, Università degli Studi di Sassari, via Vienna 2, 07100 Sassari, Italy
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