1
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Kwak D, Jung S, Ha H, Han T, Ryu DH, Kim H, Kwak J. Electroreductive Access to 1,2-Aminoalcohols via Cross Aza-Pinacol Coupling of N-Acyl Diarylketimines and Aldehydes. Org Lett 2024; 26:2733-2738. [PMID: 37417822 DOI: 10.1021/acs.orglett.3c01543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
We present highly efficient and operationally simple synthetic methods for 1,2-aminoalcohols via electroreductive cross aza-pinacol coupling between N-acyl diarylketimines and aldehydes. Preliminary mechanistic studies including cyclic voltammetry and density functional theory (DFT) calculations suggest that the reaction is instigated by selective electrochemical single electron transfer (SET) of N-acylketimines. The developed electrochemical protocol is compatible to biorelevant functional groups, enabling late-stage functionalization of pharmacophores.
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Affiliation(s)
- Dongmin Kwak
- Infectious Diseases Therapeutic Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
- Department of Chemistry, Sungkyunkwan University, Jangan, Suwon 16419, Republic of Korea
| | - Sehwa Jung
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Hyeonbin Ha
- Infectious Diseases Therapeutic Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Taedong Han
- Discovery Chemistry, Dong-A ST Research Institute, Yongin 17073, Republic of Korea
| | - Do Hyun Ryu
- Department of Chemistry, Sungkyunkwan University, Jangan, Suwon 16419, Republic of Korea
| | - Hyunwoo Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- Institute for Convergence Research and Education in Advanced Technology (I-CREATE), Yonsei University, Seoul 03722, Republic of Korea
| | - Jaesung Kwak
- Infectious Diseases Therapeutic Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
- Division of Medicinal Chemistry and Pharmacology, KRICT School, University of Science and Technology, Daejeon 34114, Republic of Korea
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2
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Jiao J, Yang W, Wang X. α-Aminocarbene-Mediated Si-H Insertion: Deoxygenative Silylation of Aromatic Amides with Silanes. J Org Chem 2023; 88:594-601. [PMID: 36521058 DOI: 10.1021/acs.joc.2c02649] [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
While metal carbene-mediated Si-H insertion reactions have become a powerful strategy to build new C-Si bonds, the utilization of α-aminocarbene intermediates generated from readily available precursors in the Si-H insertion reaction remains a longstanding challenge. Herein, we develop a practical and general strategy to synthesize α-aminosilanes through a deoxygenative cross-coupling of amides and silanes mediated by Sm/SmI2. Given the simplicity and versatility, this methodology represents a fascinating example for the effective utilization of inert amides as α-aminocarbene precursors in organic synthesis.
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Affiliation(s)
- Jiwen Jiao
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Wenhan Yang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.,College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.,School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
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3
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He Y, Wang Y, Li SJ, Lan Y, Wang X. Deoxygenative Cross-Coupling of Aromatic Amides with Polyfluoroarenes. Angew Chem Int Ed Engl 2022; 61:e202115497. [PMID: 35014163 DOI: 10.1002/anie.202115497] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Indexed: 01/17/2023]
Abstract
Considering the ubiquitous nature and ready synthesis of amides, and the great significance of organofluorine-containing species, the cross-coupling of amides and polyfluoroarenes, leading to new carbon-carbon bond-forming methodologies, would find useful applications in synthesis, late-stage functionalization, and rapid generation of molecular diversity. Herein, we present a novel synthesis of α-polyfluoroaryl amines via Sm/SmI2 -mediated deoxygenative cross-coupling of aromatic amides with polyfluoroarenes through direct C-H functionalization. The structural and functional diversity of these readily available precursors provides a versatile and flexible strategy for the streamlined synthesis of α-polyfluoroaryl amines. Combining experimental and theoretical studies, a novel plausible mechanism of the α-aminocarbene-mediated C-H insertion has been revealed, which may stimulate future work for the development of novel methods in amine synthesis.
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Affiliation(s)
- Youliang He
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Yuxiao Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Shi-Jun Li
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China
| | - Yu Lan
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China.,School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing, 400030, China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China.,School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou, 310024, China
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4
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He Y, Wang Y, Li S, Lan Y, Wang X. Deoxygenative Cross‐Coupling of Aromatic Amides with Polyfluoroarenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Youliang He
- State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Yuxiao Wang
- State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Shi‐Jun Li
- Green Catalysis Center, and College of Chemistry Zhengzhou University Zhengzhou 450001 China
| | - Yu Lan
- Green Catalysis Center, and College of Chemistry Zhengzhou University Zhengzhou 450001 China
- School of Chemistry and Chemical Engineering Chongqing Key Laboratory of Theoretical and Computational Chemistry Chongqing University Chongqing 400030 China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
- School of Chemistry and Materials Science Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences 1 Sub-lane Xiangshan Hangzhou 310024 China
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5
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Murray PD, Cox JH, Chiappini ND, Roos CB, McLoughlin EA, Hejna BG, Nguyen ST, Ripberger HH, Ganley JM, Tsui E, Shin NY, Koronkiewicz B, Qiu G, Knowles RR. Photochemical and Electrochemical Applications of Proton-Coupled Electron Transfer in Organic Synthesis. Chem Rev 2022; 122:2017-2291. [PMID: 34813277 PMCID: PMC8796287 DOI: 10.1021/acs.chemrev.1c00374] [Citation(s) in RCA: 158] [Impact Index Per Article: 79.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Indexed: 12/16/2022]
Abstract
We present here a review of the photochemical and electrochemical applications of multi-site proton-coupled electron transfer (MS-PCET) in organic synthesis. MS-PCETs are redox mechanisms in which both an electron and a proton are exchanged together, often in a concerted elementary step. As such, MS-PCET can function as a non-classical mechanism for homolytic bond activation, providing opportunities to generate synthetically useful free radical intermediates directly from a wide variety of common organic functional groups. We present an introduction to MS-PCET and a practitioner's guide to reaction design, with an emphasis on the unique energetic and selectivity features that are characteristic of this reaction class. We then present chapters on oxidative N-H, O-H, S-H, and C-H bond homolysis methods, for the generation of the corresponding neutral radical species. Then, chapters for reductive PCET activations involving carbonyl, imine, other X═Y π-systems, and heteroarenes, where neutral ketyl, α-amino, and heteroarene-derived radicals can be generated. Finally, we present chapters on the applications of MS-PCET in asymmetric catalysis and in materials and device applications. Within each chapter, we subdivide by the functional group undergoing homolysis, and thereafter by the type of transformation being promoted. Methods published prior to the end of December 2020 are presented.
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Affiliation(s)
- Philip
R. D. Murray
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - James H. Cox
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Nicholas D. Chiappini
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Casey B. Roos
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | | | - Benjamin G. Hejna
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Suong T. Nguyen
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Hunter H. Ripberger
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Jacob M. Ganley
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Elaine Tsui
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Nick Y. Shin
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Brian Koronkiewicz
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Guanqi Qiu
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Robert R. Knowles
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
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6
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Jiao J, Wang X. Merging Electron Transfer with 1,2-Metalate Rearrangement: Deoxygenative Arylation of Aromatic Amides with Arylboronic Esters. Angew Chem Int Ed Engl 2021; 60:17088-17093. [PMID: 33988285 DOI: 10.1002/anie.202104359] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/28/2021] [Indexed: 12/15/2022]
Abstract
Amides are essentially inert carboxyl derivatives in many types of chemical transformations. In particular, deoxygenative C-C bond formation of amides to synthetically important amines is a long-standing challenge for synthetic chemists due to the inertness of the resonance-stabilized amide C=O bond. Herein, it is disclosed that by merging electron-transfer-induced activation with 1,2-metalate rearrangement, a wide range of aromatic amides react smoothly with arylboron reagents, affording a series of biologically relevant diarylmethylamines as deoxygenative C-C bond cross-coupling products. With its simplicity and versatility, this reaction shows great promise in the synthesis of amines from amides, which may open up new avenues in retrosynthetic planning and find widespread use in academia and industry.
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Affiliation(s)
- Jiwen Jiao
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China.,School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou, 310024, China
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7
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Jiao J, Wang X. Merging Electron Transfer with 1,2‐Metalate Rearrangement: Deoxygenative Arylation of Aromatic Amides with Arylboronic Esters. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104359] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jiwen Jiao
- State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
- School of Chemistry and Materials Science Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences 1 Sub-lane Xiangshan Hangzhou 310024 China
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8
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Rafferty SM, Rutherford JE, Zhang L, Wang L, Nagib DA. Cross-Selective Aza-Pinacol Coupling via Atom Transfer Catalysis. J Am Chem Soc 2021; 143:5622-5628. [DOI: 10.1021/jacs.1c00886] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Sean M. Rafferty
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Joy E. Rutherford
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Lumin Zhang
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Lu Wang
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - David A. Nagib
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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9
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Shimizu M, Higashino A, Mizota I, Zhu Y. N-Alkylation/aldol reaction of α-aldimino thioesters: a facile three-component coupling reaction. RSC Adv 2021; 11:13097-13104. [PMID: 35423863 PMCID: PMC8697212 DOI: 10.1039/d1ra02000e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 03/31/2021] [Indexed: 11/29/2022] Open
Abstract
Theoretical calculation of the reactivity of α-imino thioesters indicates that they are very reactive substrates for Umpolung N-alkylation. In fact, treatment of α-aldimino thioesters with dialkylzinc reagents in the presence of aldehydes or imines gives three-component coupling products in good yields.
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Affiliation(s)
- Makoto Shimizu
- School of Energy Science and Engineering, Nanjing Tech University Nanjing 211816 Jiangsu Province China
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University Tsu Mie 514-8507 Japan
| | - Asako Higashino
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University Tsu Mie 514-8507 Japan
| | - Isao Mizota
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University Tsu Mie 514-8507 Japan
| | - Yusong Zhu
- School of Energy Science and Engineering, Nanjing Tech University Nanjing 211816 Jiangsu Province China
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10
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Tambe SD, Min KH, Iqbal N, Cho EJ. Distinctive reactivity of N-benzylidene-[1,1'-biphenyl]-2-amines under photoredox conditions. Beilstein J Org Chem 2020; 16:1335-1342. [PMID: 32595781 PMCID: PMC7308614 DOI: 10.3762/bjoc.16.114] [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: 03/30/2020] [Accepted: 06/02/2020] [Indexed: 12/28/2022] Open
Abstract
A simple photocatalytic method was developed for the synthesis of unsymmetrical 1,2-diamines by the unprecedented reductive coupling of N-benzylidene-[1,1'-biphenyl]-2-amines with an aliphatic amine. The presence of a phenyl substituent in the aniline moiety of the substrate was critical for the reactivity. The reaction proceeded via radical–radical cross-coupling of α-amino radicals generated by proton-coupled single-electron transfer in the presence of an Ir photocatalyst. On the other hand, symmetrical 1,2-diamines were selectively produced from the same starting materials by the judicious choice of the reaction conditions, showcasing the distinct reactivity of N-benzylidene-[1,1'-biphenyl]-2-amines. The developed method can be employed for the synthesis of various bulky vicinal diamines, which are potential ligands in stereoselective synthesis.
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Affiliation(s)
- Shrikant D Tambe
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Kwan Hong Min
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Naeem Iqbal
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
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11
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Lefebvre Q, Porta R, Millet A, Jia J, Rueping M. One Amine-3 Tasks: Reductive Coupling of Imines with Olefins in Batch and Flow. Chemistry 2020; 26:1363-1367. [PMID: 31777987 PMCID: PMC7027816 DOI: 10.1002/chem.201904483] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Indexed: 11/05/2022]
Abstract
Owing to their wide range of biological properties, γ-aminobutyric acid derivatives (GABA) have been extensively studied and found noteworthy industrial applications. However, atom-economical and efficient processes for their production are scarce and would greatly benefit from further investigations. Herein, we demonstrate that an iridium-based photocatalyst promotes the direct reductive cross-coupling of imines with olefins upon irradiation with visible light to give GABA derivatives in good yields and selectivities. We also stress the enabling triple role of tributylamine additive in this process, discuss the advantages of strategies based on proton-coupled electron transfer (PCET) and demonstrate the scale-up of this reaction in continuous flow.
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Affiliation(s)
- Quentin Lefebvre
- Institut of Organic ChemistryRWTH AachenLandoltweg 152074AachenGermany
| | - Riccardo Porta
- Institut of Organic ChemistryRWTH AachenLandoltweg 152074AachenGermany
- Dipartimento di ChimicaUniversità degli Studi di MilanoVia Golgi 1920133MilanoItaly
| | - Anthony Millet
- Institut of Organic ChemistryRWTH AachenLandoltweg 152074AachenGermany
| | - Jiaqi Jia
- Institut of Organic ChemistryRWTH AachenLandoltweg 152074AachenGermany
| | - Magnus Rueping
- Institut of Organic ChemistryRWTH AachenLandoltweg 152074AachenGermany
- King Abdullah University of Science and Technology (KAUST)KAUST Catalysis Center (KCC)Thuwal23955-6900Saudi Arabia
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12
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SmI2-promoted cross coupling reaction of N-2-bromoethylphthalimide and carbonyl compounds: Synthesis of α-aryl-α′-hydroxy ketones. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Soto M, Soengas RG, Silva AMS, Gotor-Fernández V, Rodríguez-Solla H. Temperature-Controlled Stereodivergent Synthesis of 2,2'-Biflavanones Promoted by Samarium Diiodide. Chemistry 2019; 25:13104-13108. [PMID: 31361369 DOI: 10.1002/chem.201902927] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 07/29/2019] [Indexed: 12/11/2022]
Abstract
In this work, the first example of a radical stereodivergent reaction directed towards the stereoselective synthesis of both (R*,R*)- and (R*,S*)-2,2'-biflavanones promoted by samarium diiodide is reported. Control experiments showed that the selectivity of this reaction was exclusively controlled by the temperature. It was possible to generate a variety of 2,2'-biflavanones bearing different substitution patterns at the aromatic ring in good-to-quantitative yields, being both stereoisomers of the desired compounds obtained with total or high control of selectivity. A mechanism that explains both the generation of the corresponding 2,2'-biflavanones and the selectivity is also discussed. The structure and stereochemistry determination of each isomer was unequivocally elucidated by single-crystal X-ray diffraction experiments.
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Affiliation(s)
- Martín Soto
- Department of Organic and Inorganic Chemistry, University of Oviedo, Avenida Julián Clavería 8, 33006, Oviedo, Spain
| | - Raquel G Soengas
- Research Centre CIAIMBITAL, University of Almería, Carretera de Sacramento s/n, 04120, Almería, Spain
| | - Artur M S Silva
- Department of Chemistry & QOPNA, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Vicente Gotor-Fernández
- Department of Organic and Inorganic Chemistry, University of Oviedo, Avenida Julián Clavería 8, 33006, Oviedo, Spain
| | - Humberto Rodríguez-Solla
- Department of Organic and Inorganic Chemistry, University of Oviedo, Avenida Julián Clavería 8, 33006, Oviedo, Spain
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14
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Vellemäe E, Tšubrik O, Mäeorg S, Mäeorg U. Mischmetall and Zn–Cu Couple as Efficient Reagents for the Pinacol Coupling of Aldimines. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823406776330792] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The reductive pinacol coupling of aldimines was studied in respect to different coupling-mediators such as mischmetall, Zn–Cu couple and Devarda alloy. High diastereoselectivity was achieved for three substrates. A simple procedure for the preparation of 1,2-diamines is described.
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Affiliation(s)
- Eerold Vellemäe
- Institute of Organic and Bioorganic Chemistry, University of Tartu, Jakobi 2, 51014, Tartu, Estonia
| | - Olga Tšubrik
- Institute of Organic and Bioorganic Chemistry, University of Tartu, Jakobi 2, 51014, Tartu, Estonia
| | - Sirje Mäeorg
- Institute of Organic and Bioorganic Chemistry, University of Tartu, Jakobi 2, 51014, Tartu, Estonia
| | - Uno Mäeorg
- Institute of Organic and Bioorganic Chemistry, University of Tartu, Jakobi 2, 51014, Tartu, Estonia
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15
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Okamoto S, Ariki R, Tsujioka H, Sudo A. A Metal-Free Approach to 1,2-Diamines via Visible Light-Driven Reductive Coupling of Imines with Perylene as a Photoredox Catalyst. J Org Chem 2017; 82:9731-9736. [PMID: 28836438 DOI: 10.1021/acs.joc.7b01838] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A simple, metal-free, and versatile approach to 1,2-diamines has been developed based on reductive coupling reactions of various imines, where perylene, an aromatic hydrocarbon, was used as a photoredox catalyst under visible light irradiation using a white light-emitting diode. The use of 1 mol % perylene enabled almost complete conversion of the imines, leading to the formation of their corresponding 1,2-diamines, which were isolated in good yields. The ratios between dl and meso diamines ranged from 31:69 to 82:18 depending on the substituents of the imines.
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Affiliation(s)
- Shusuke Okamoto
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University , Kowakae 3-4-1, Higashiosaka, Osaka 577-8502, Japan
| | - Risako Ariki
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University , Kowakae 3-4-1, Higashiosaka, Osaka 577-8502, Japan
| | - Hiroki Tsujioka
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University , Kowakae 3-4-1, Higashiosaka, Osaka 577-8502, Japan
| | - Atsushi Sudo
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University , Kowakae 3-4-1, Higashiosaka, Osaka 577-8502, Japan
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16
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Suzuki J, Miyano N, Yashiro S, Umezawa T, Matsuda F. Total synthesis of (-)-kainic acid and (+)-allo-kainic acid through SmI 2-mediated intramolecular coupling between allyl chloride and an α,β-unsaturated ester. Org Biomol Chem 2017; 15:6557-6566. [PMID: 28748237 DOI: 10.1039/c7ob01427a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A 3,4-disubstituted pyrrolidine ring was effectively cyclized through SmI2-mediated reductive coupling between allyl chloride and an α,β-unsaturated ester, although little has been reported about SmI2-promoted C-C bond formation of an allyl chloride with an α,β-unsaturated ester. Selection of either the 3,4-cis- or 3,4-trans-selective cyclization can be accomplished simply by changing the additives from NiI2 to HMPA during reductive cyclization conducted in H2O-THF. Total synthesis of (-)-kainic acid and (+)-allo-kainic acid, which are pyrrolidine alkaloids used in neuroscience and neuropharmacology as useful molecular probes, was successfully achieved by using the stereo-complementary ring closure reactions promoted by SmI2 for the construction of the 2,3,4-trisubsituted pyrrolidine scaffold of kainoids.
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Affiliation(s)
- Junya Suzuki
- Graduate School of Environmental Science, Hokkaido University, N10 W5, Sapporo 060-0810, Japan.
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17
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Chen N, Dai XJ, Wang H, Li CJ. Umpolung Addition of Aldehydes to Aryl Imines. Angew Chem Int Ed Engl 2016; 56:6260-6263. [PMID: 28026143 DOI: 10.1002/anie.201610578] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Indexed: 01/19/2023]
Abstract
One of the classical ways to synthesize amines involves the coupling of carbonyl compounds and imines, either through enolate chemistry or acyl-based carbanion equivalents. We herein report an alternative strategy that is based on the use of aldehydes as alkyl carbanion equivalents in a reductive coupling with aryl imines. A wide array of secondary amines can be synthesized in moderate to high yields. This reaction is mediated by hydrazine and catalyzed by ruthenium(II) complexes, and it tolerates various functional groups, such as esters, amides, and nitriles.
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Affiliation(s)
- Ning Chen
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. W., Montreal, Quebec, H3A 0B8, Canada.,Department of Organic Chemistry, Faculty of Science, Beijing University of Chemical Technology, Beijing, China
| | - Xi-Jie Dai
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. W., Montreal, Quebec, H3A 0B8, Canada
| | - Haining Wang
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. W., Montreal, Quebec, H3A 0B8, Canada
| | - Chao-Jun Li
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. W., Montreal, Quebec, H3A 0B8, Canada
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18
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Affiliation(s)
- Ning Chen
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis; McGill University; 801 Sherbrooke St. W. Montreal Quebec H3A 0B8 Canada
- Department of Organic Chemistry, Faculty of Science; Beijing University of Chemical Technology; Beijing China
| | - Xi-Jie Dai
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis; McGill University; 801 Sherbrooke St. W. Montreal Quebec H3A 0B8 Canada
| | - Haining Wang
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis; McGill University; 801 Sherbrooke St. W. Montreal Quebec H3A 0B8 Canada
| | - Chao-Jun Li
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis; McGill University; 801 Sherbrooke St. W. Montreal Quebec H3A 0B8 Canada
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McDonald CE, Ramsey JD, McAtee CC, Mauck JR, Hale EM, Cumens JA. The Use of Ureates as Activators for Samarium Diiodide. J Org Chem 2016; 81:5903-14. [DOI: 10.1021/acs.joc.6b00733] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chriss E. McDonald
- Department
of Chemistry, Lycoming College, 700 College Place, Williamsport, Pennsylvania 17701, United States
| | - Jeremy D. Ramsey
- Department
of Chemistry, Lycoming College, 700 College Place, Williamsport, Pennsylvania 17701, United States
| | - Christopher C. McAtee
- Department
of Chemistry, Lycoming College, 700 College Place, Williamsport, Pennsylvania 17701, United States
| | - Joseph R. Mauck
- Department
of Chemistry, Lycoming College, 700 College Place, Williamsport, Pennsylvania 17701, United States
| | - Erin M. Hale
- Department
of Chemistry, Lycoming College, 700 College Place, Williamsport, Pennsylvania 17701, United States
| | - Justin A. Cumens
- Department
of Chemistry, Lycoming College, 700 College Place, Williamsport, Pennsylvania 17701, United States
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20
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Mizota I, Shimizu M. Umpolung Reactions of α-Imino Esters: Useful Methods for the Preparation of α-Amino Acid Frameworks. CHEM REC 2016; 16:688-702. [DOI: 10.1002/tcr.201500267] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Isao Mizota
- Department of Chemistry for Materials; Graduate School of Engineering Mie University; Tsu Mie 514-8507 Japan
| | - Makoto Shimizu
- Department of Chemistry for Materials; Graduate School of Engineering Mie University; Tsu Mie 514-8507 Japan
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21
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A novel one-pot synthesis of vicinal diamines with benzaldehyde and aniline derivatives mediated by BiCl3/Zn. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Umeda R, Ninomiya M, Nishino T, Kishida M, Toiya S, Saito T, Nishiyama Y, Sonoda N. A novel lanthanum metal-assisted reaction of diaryl ketones and electrophiles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.089] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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23
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Huang PQ, Lang QW, Wang AE, Zheng JF. Direct reductive coupling of secondary amides: chemoselective formation of vicinal diamines and vicinal amino alcohols. Chem Commun (Camb) 2015; 51:1096-9. [DOI: 10.1039/c4cc08330j] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the first direct and chemoselective reductive homocoupling reaction of secondary amides and cross-coupling reaction of secondary amides with ketones. This method relies on the direct generation of α-amino carbon radicals from amides.
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Affiliation(s)
- Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Qi-Wei Lang
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Ai-E Wang
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Jian-Feng Zheng
- Department of Chemistry and Fujian Provincial Key Laboratory for Chemical Biology
- Collaborative Innovation Centre of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
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24
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Matsumoto M, Harada M, Yamashita Y, Kobayashi S. Catalytic imine–imine cross-coupling reactions. Chem Commun (Camb) 2014; 50:13041-4. [DOI: 10.1039/c4cc06156j] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Sun L, Sahloul K, Mellah M. Use of Electrochemistry to Provide Efficient SmI2 Catalytic System for Coupling Reactions. ACS Catal 2013. [DOI: 10.1021/cs400587s] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Linhao Sun
- Laboratoire
de Catalyse Moléculaire,
UMR 8182− ICMMO, Université Paris Sud, Orsay F-91405, France
| | - Kamar Sahloul
- Laboratoire
de Catalyse Moléculaire,
UMR 8182− ICMMO, Université Paris Sud, Orsay F-91405, France
| | - Mohamed Mellah
- Laboratoire
de Catalyse Moléculaire,
UMR 8182− ICMMO, Université Paris Sud, Orsay F-91405, France
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Emerson CR, Zakharov LN, Blakemore PR. Investigation of functionalized α-chloroalkyllithiums for a stereospecific reagent-controlled homologation approach to the analgesic alkaloid (-)-epibatidine. Chemistry 2013; 19:16342-56. [PMID: 24127119 DOI: 10.1002/chem.201302511] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Indexed: 11/10/2022]
Abstract
Four putative functionalized α-chloroakyllithiums RCH2CHLiCl, where R=CHCH2(18 a), CCH (18 b), CH2OBn (18 c), and CH[O(CH2)2O] (18 d), were generated in situ by sulfoxide-lithium exchange from α-chlorosulfoxides, and investigated for the stereospecific reagent-controlled homologation (StReCH) of phenethyl and 2-chloropyrid-5-yl (17) pinacol boronic esters. Deuterium labeling experiments revealed that α-chloroalkyllithiums are quenched by proton transfer from their α-chlorosulfoxide precursors and it was established that this effect compromises the yield of StReCH reactions. Use of α-deuterated α-chlorosulfoxides was discovered to ameliorate the problem by retarding the rate of acid-base chemistry between the carbenoid and its precursor. Carbenoids 18 a and 18 b showed poor StReCH efficacy, particularly the propargyl group bearing carbenoid 18 b, the instability of which was attributed to a facile 1,2-hydride shift. By contrast, 18 d, a carbenoid that benefits from a stabilizing interaction between O and Li atoms gave good StReCH yields. Boronate 17 was chain extended by carbenoids 18 a, 18 b, and 18 d in 16, 0, and 68% yield, respectively; α-deuterated isotopomers D-18 a and D-18 d gave yields of 33 and 79% for the same reaction. Double StReCH of 17 was pursued to target contiguous stereodiads appropriate for the total synthesis of (-)-epibatidine (15). One-pot double StReCH of boronate 17 by two exposures to (S)-D-18 a (≤66 % ee), followed by work-up with KOOH, gave the expected stereodiad product in 16% yield (d.r.~67:33). The comparable reaction using two exposures to (S)-D-18 d (≤90% ee) delivered the expected bisacetal containing stereodiad (R,R)-DD-48 in 40% yield (≥98% ee, d.r.=85:15). Double StReCH of 17 using (S)-D-18 d (≤90% ee) followed by (R)-D-18 d (≤90% ee) likewise gave (R,S)-DD-48 in 49% yield (≥97% ee, d.r.=79:21). (R,S)-DD-48 was converted to a dideuterated isotopomer of a synthetic intermediate in Corey's synthesis of 15.
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Sano T, Mizota I, Shimizu M. Tandem N-Alkylation–Addition Reaction of α-Aldimino Ester and Application to a New Flow System. CHEM LETT 2013. [DOI: 10.1246/cl.130396] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takanori Sano
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University
| | - Isao Mizota
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University
| | - Makoto Shimizu
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University
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Sahloul K, Sun L, Requet A, Chahine Y, Mellah M. A Samarium “Soluble” Anode: A New Source of SmI2 Reagent for Electrosynthetic Application. Chemistry 2012; 18:11205-9. [DOI: 10.1002/chem.201201390] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Indexed: 11/06/2022]
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29
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Kise N, Yamane A, Nakao S, Takebe A, Sakurai T. Diastereoselective intermolecular coupling of chiral α-imino amides with ketones by electroreduction. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.10.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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30
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Rao CN, Hoz S. Autocatalysis and surface catalysis in the reduction of imines by SmI2. J Am Chem Soc 2011; 133:14795-803. [PMID: 21848327 DOI: 10.1021/ja205885q] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reduction of the three imines, N-benzylidene aniline (BAI), N-benzylidenemethylamine (BMI), and benzophenone imine (BPI), with SmI(2) gives the reduced as well as coupled products. The reactions were found to be autocatalytic due to the formation of the trivalent samarium in the course of the reaction. When preprepared SmI(3) was added to the reaction mixture, the reaction rate increased significantly. However, the kinetics were found to be of zero order in SmI(2). This type of behavior is typical of surface catalysis with saturation of the catalytic sites. Although no solids are visible to the naked eye, the existence of microcrystals was proven by light microscopy as well as by dynamic light scattering analysis. Although HRTEM shows the existence of quantum dots in the solid, we were unable to make a direct connection between the existence of the quantum dots and the catalytic phenomenon. In the uncatalyzed reaction, the order of reactivity is BPI > BMI > BAI. This order does not conform to the electron affinity order of the substrates but rather to the nitrogen lone pair accessibility for complexation. This conclusion was further supported by using HMPA as a diagnostic probe for the existence of an inner sphere electron transfer reaction.
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Soueidan M, Hélion F, Namy JL, Szymoniak J. Homocoupling of aldimines mediated by zirconocene: synthesis of vicinal diamines and imidazolidines. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.01.075] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Radicals in transition metal catalyzed reactions? transition metal catalyzed radical reactions?: a fruitful interplay anyway: part 3: catalysis by group 10 and 11 elements and bimetallic catalysis. Top Curr Chem (Cham) 2011; 320:323-451. [PMID: 22143611 DOI: 10.1007/128_2011_288] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review summarizes the current status of transition metal catalyzed reactions involving radical intermediates in organic chemistry. This part focuses on radical-based methods catalyzed by group 10 and group 11 metal complexes. Reductive and redox-neutral C-C bond formations catalyzed by low-valent metal complexes as well as catalytic oxidative methods are reviewed. Catalytic processes which rely on the combination of two metal complexes are also covered.
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33
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Kumar A, Samuelson AG. Diastereospecific Coupling of Imines by Low-Valent Titanium: An Experimental and Computational Study. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001256] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Liu YK, Zhang YM, Liu X. Intermolecular Heterocoupling Reaction between N-Sulfonylimines and Aliphatic Ketones Promoted by Samarium (II) Iodide. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20010190512] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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35
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Graët A, Sinault L, Fusaro MB, Vallet AL, Seu C, Kilgore JL, Baum MM. Reactivity of the Nickel(0)−CO2−Imine System: New Pathway to Vicinal Diamines. Organometallics 2010. [DOI: 10.1021/om900765m] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexandre Graët
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - Laura Sinault
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - Maxime B. Fusaro
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - Anne-Laure Vallet
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - Candace Seu
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - James L. Kilgore
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
| | - Marc M. Baum
- Department of Chemistry, Oak Crest Institute of Science, 2275 E. Foothill Boulevard, Pasadena, California 91107
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Burchak ON, Py S. Reductive cross-coupling reactions (RCCR) between CN and CO for β-amino alcohol synthesis. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.06.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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38
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Wang B, Wang YJ. SmI2-Promoted Intramolecular Asymmetric Pinacol-Type Ketone−tert-Butanesulfinyl Imine Reductive Coupling: Stereoselectivity and Mechanism. Org Lett 2009; 11:3410-3. [DOI: 10.1021/ol901296u] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bing Wang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Yong-Jun Wang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
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39
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Highly stereoselective iminopinacol coupling of chiral aromatic imines derived from di- and tripeptides. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.09.149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Jiang HF, Huang XZ. Synthesis of vicinal diamines via Zn–H2O–CO2-induced reduction of aromatic imines in supercritical carbon dioxide. J Supercrit Fluids 2007. [DOI: 10.1016/j.supflu.2007.07.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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41
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Reißig HU, Khan FA, Czerwonka R, Dinesh CU, Shaikh AL, Zimmer R. Benzannulated Cyclooctanol Derivatives by Samarium Diiodide Induced Intramolecular Carbonyl–Alkene Coupling – Scope, Limitations, Stereoselectivity. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600360] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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42
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Mojtahedi MM, Saidi MR, Shirzi JS, Bolourtchian M. ULTRASOUND ACCELERATED REDUCTIVE COUPLING OF IMINE OR IMINIUM ION GENERATED IN 5 M LITHIUM PERCHLORATE SOLUTION BY LITHIUM METAL. SYNTHETIC COMMUN 2006. [DOI: 10.1081/scc-100107005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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43
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Dahlén A, Nilsson A, Hilmersson G. Estimating the Limiting Reducing Power of SmI2/H2O/Amine and YbI2/H2O/Amine by Efficient Reduction of Unsaturated Hydrocarbons. J Org Chem 2006; 71:1576-80. [PMID: 16468808 DOI: 10.1021/jo052268k] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mixture of samarium diiodide, amine, and water (SmI2/H2O/Et3N) is known to be a particularly powerful reductant, but until now the limiting reducing power has not been determined. A series of unsaturated hydrocarbons with varying half-wave reduction potentials (E(1/2) = -1.6 to -3.4 V, vs SCE) have been treated with SmI2/H2O/Et3N and YbI2/H2O/Et3N, respectively. All hydrocarbons with potentials of -2.8 V or more positive were readily reduced with SmI2/H2O/Et3N, whereas all hydrocarbons with potentials of -2.3 V or more positive were readily reduced using YbI2/H2O/Et3N. This defines limiting values of the chemical reducing power of SmI2/H2O/Et3N to -2.8 V and of YbI2/H2O/Et3N to -2.3 V vs SCE.
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Affiliation(s)
- Anders Dahlén
- Department of Chemistry, Göteborg University, SE-412 96 Göteborg University, Sweden
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44
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Chapter 230 Samarium (II) based reductants. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/s0168-1273(06)36004-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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45
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Sergeeva EV, Rozenberg VI, Antonov DY, Vorontsov EV, Starikova ZA, Fedyanin IV, Hopf H. Novel multichiral diols and diamines by highly stereoselective pinacol coupling of planar chiral [2.2]paracyclophane derivatives. Chemistry 2005; 11:6944-61. [PMID: 16138381 DOI: 10.1002/chem.200500413] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The TiCl4/Zn-mediated intermolecular pinacol coupling of the planar chiral carbonyl compounds [2.2]paracyclophane-4-carbaldehyde, 4-acetyl[2.2]paracyclophane (ketone) and the four regioisomeric 5-, 7-, 12- and 13-methoxy[2.2]paracyclophane-4-carbaldehydes as well as the pTosOH-Zn/Cu-promoted coupling of their N-substituted imines is described. Coupling of the enantiomerically pure substrates (most of carbonyl compounds and all imines) occurs stereoselectively giving rise to diastereomerically pure 1,2-diols and 1,2-diamines. Racemic aldehydes and ketone react with different degrees of stereoselectivity (depending on the substituents in certain positions) and produce one to three diastereomers. 7-methoxy[2.2]paracyclophane-4-carbaldehyde undergoes a tandem pinacol coupling-pinacol rearrangement to yield bis-(7-methoxy[2.2]paracyclophane-4-yl)acetaldehyde. Coupling of the racemic imines produces a mixture of single racemic D,L-diamine and single meso-diamine in each case. The stereoselective formation of the asymmetric centres is governed by the planar chiral [2.2]paracyclophanyl moiety. The techniques elaborated are extended to the intramolecular coupling of [2.2]paracyclophane-4,13-dicarbaldehyde and its bis-N-phenylimine, resulting in stereoselective formation of the chiral triply-bridged diol and exclusive formation of the meso-diamine. X-Ray investigations of several diols and diamines have been carried out and the structural features of these derivatives are discussed.
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Affiliation(s)
- Elena V Sergeeva
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Science, Vavilova 28, 119991 Moscow, Russia
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Zhong YW, Dong YZ, Fang K, Izumi K, Xu MH, Lin GQ. A Highly Efficient and Direct Approach for Synthesis of Enantiopure β-Amino Alcohols by Reductive Cross-Coupling of Chiral N-tert-Butanesulfinyl Imines with Aldehydes. J Am Chem Soc 2005; 127:11956-7. [PMID: 16117531 DOI: 10.1021/ja054401w] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A highly efficient and practical approach for the synthesis of optically pure beta-amino alcohols by the SmI2-induced reductive cross-coupling of chiral N-tert-butanesulfinyl imines with aldehydes was developed. This method allows the preparation of a broad range of chiral beta-amino alcohols, including functionalized ones under mild conditions. It provides a straightforward access to enantiopure beta-amino alcohols that are widely applicable in asymmetric synthesis.
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Affiliation(s)
- Yu-Wu Zhong
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
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47
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Kawaji T, Hayashi K, Hashimoto I, Matsumoto T, Thiemann T, Mataka S. Synthesis of 1,2,9,10-tetrakis(N-phenylamino)[2.2]metacyclophane by SmI2-mediated reductive coupling of diimine. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.06.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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48
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Zhong YW, Izumi K, Xu MH, Lin GQ. Highly Diastereoselective and Enantioselective Synthesis of Enantiopure C2-Symmetrical Vicinal Diamines by Reductive Homocoupling of Chiral N-tert-Butanesulfinyl Imines. Org Lett 2004; 6:4747-50. [PMID: 15575676 DOI: 10.1021/ol0479803] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] An efficient and straightforward method for the preparation of highly enantiomerically enriched C2-symmetrical vicinal diamines by the reductive homocoupling of aromatic N-tert-butanesulfinyl imines in the presence of SmI2 and HMPA was developed. It gives access to a variety of enantiopure C2-symmetrical 1,2-diamines in a very mild and practical way.
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Affiliation(s)
- Yu-Wu Zhong
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
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Kise N, Ohya K, Arimoto K, Yamashita Y, Hirano Y, Ono T, Ueda N. Electroreductive Intramolecular Coupling of Aromatic β- and γ-Imino Esters: A New Synthetic Method for N-Alkoxycarbonyl-2-aryl-3-ones and cis-2-Aryl-3-ols of Pyrrolidines and Piperidines. J Org Chem 2004; 69:7710-9. [PMID: 15498001 DOI: 10.1021/jo0488917] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The electroreduction of aromatic beta- and gamma-imino esters prepared from beta-alanine and GABA in the presence of chlorotrimethylsilane and subsequent N-alkoxycarbonylation of the resulting five- and six-membered cyclized amines gave mixed ketals of N-alkoxycarbonyl-2-arylpyrrolidin-3-ones and 2-arylpiperidin-3-ones, respectively. The best result of the electroreductive intramolecular coupling was achieved using Bu(4)NClO(4) as a supporting electrolyte and a Pb cathode in THF. Acid hydrolysis of the mixed ketals afforded N-alkoxycarbonyl-2-arylpyrrolidin-3-ones and 2-arylpiperidin-3-ones in good yields. The reduction of these ketones with NaBH(4) in methanol afforded the corresponding N-alkoxycarbonyl-cis-2-arylpyrrolidin-3-ols and cis-2-arylpiperidin-3-ols diastereospecifically.
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Affiliation(s)
- Naoki Kise
- Department of Biotechnology, Faculty of Engineering, Tottori University, Koyama, Tottori 680-8552, Japan.
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Zhong YW, Xu MH, Lin GQ. Samarium Diiodide-Induced Asymmetric Synthesis of Optically Pure Unsymmetrical Vicinal Diamines by Reductive Cross-Coupling of Nitrones with N-tert-Butanesulfinyl Imines. Org Lett 2004; 6:3953-6. [PMID: 15496072 DOI: 10.1021/ol048444d] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] An efficient method for the preparation of optically pure unsymmetrical vicinal diamines by the SmI(2)-induced reductive cross-coupling of nitrones with chiral N-tert-butanesulfinyl imines was developed. This is the first successful example of the highly diastereoselective and enantioselective cross-coupling between two different imine species. It provides a straightforward access to enantiopure unsymmetrical vicinal diamines that are widely applicable in asymmetric synthesis.
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Affiliation(s)
- Yu-Wu Zhong
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
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