1
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Praveen C. Cycloisomerization of π-Coupled Heteroatom Nucleophiles by Gold Catalysis: En Route to Regiochemically Defined Heterocycles. CHEM REC 2021; 21:1697-1737. [PMID: 34061426 DOI: 10.1002/tcr.202100105] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/08/2021] [Accepted: 05/11/2021] [Indexed: 11/06/2022]
Abstract
Since the dawn of millennium, catalytic gold chemistry is at the forefront to set off diverse organic reactions via unique activation of π-bonded molecules. Within this purview, cycloisomerization of heteroatom nucleophiles linked to a π-system is one of the well recognized chemistry for the construction of numerous heterocyclic cores. Though the rudimentary aspects of this transformation are reviewed by several groups in different timeline, a holistic view on regiochemistry of such reactions went largely overlooked. Hence, this account emphasizes the gold catalyzed regioselective cycloisomerization of structurally distinctive π-connected hetero-nucleophiles leading to different heterocycles documented in the last two decades. From an application perspective, this account also highlights those methodologies which find a role in the total synthesis of natural products. Wherever appropriate, mechanistic details and contributing factors for selectivity are also discussed.
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Affiliation(s)
- Chandrasekar Praveen
- Electrochemical Power Sources Division, Central Electrochemical Research Institute (CSIR Laboratory), Alagappapuram, Karaikudi, 630003, Sivagangai District, Tamil Nadu, India
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2
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Yang Z, Tan Q, Jiang Y, Yang J, Su X, Qiao Z, Zhou W, He L, Qiu H, Zhang M. Asymmetric Total Synthesis of Sarpagine and Koumine Alkaloids. Angew Chem Int Ed Engl 2021; 60:13105-13111. [PMID: 33783073 DOI: 10.1002/anie.202102416] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/24/2021] [Indexed: 12/23/2022]
Abstract
We report here a concise, collective, and asymmetric total synthesis of sarpagine alkaloids and biogenetically related koumine alkaloids, which structurally feature a rigid cage scaffold, with L-tryptophan as the starting material. Two key bridged skeleton-forming reactions, namely tandem sequential oxidative cyclopropanol ring-opening cyclization and ketone α-allenylation, ensure concurrent assembly of the caged sarpagine scaffold and installation of requisite derivative handles. With a common caged intermediate as the branch point, by taking advantage of ketone and allene groups therein, total synthesis of five sarpagine alkaloids (affinisine, normacusine B, trinervine, Na -methyl-16-epipericyclivine, and vellosimine) with various substituents and three koumine alkaloids (koumine, koumimine, and N-demethylkoumine) with more complex cage scaffolds has been accomplished.
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Affiliation(s)
- Zhao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Qiuyuan Tan
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Yan Jiang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Jiaojiao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Xiaojiao Su
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Zhen Qiao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Wenqiang Zhou
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Ling He
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Hanyue Qiu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
| | - Min Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Centre, School of Pharmaceutical Sciences, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing, 401331, China
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3
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Yang Z, Tan Q, Jiang Y, Yang J, Su X, Qiao Z, Zhou W, He L, Qiu H, Zhang M. Asymmetric Total Synthesis of Sarpagine and Koumine Alkaloids. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Zhao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Qiuyuan Tan
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Yan Jiang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Jiaojiao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Xiaojiao Su
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Zhen Qiao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Wenqiang Zhou
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Ling He
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Hanyue Qiu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
| | - Min Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research Innovative Drug Research Centre School of Pharmaceutical Sciences Chongqing University 55 Daxuecheng South Road, Shapingba Chongqing 401331 China
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4
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Abstract
Efficient four- and five-step routes to access functionalized bicyclo[3.2.1]oct-2-ene and bicyclo[3.3.1]nonadiene via indium-mediated cycloisomerization of 1,6-enynes has been developed. This atom-economical catalytic process was optimized and relied on the efficiency of InCl3 leading to the preparation of functionalized bicyclic adducts in up to 99% isolated yield. The cyclization occurred on two different processes (5-exo versus 6-endo pathway) and were influenced by the substitution of the alkynyl moiety. The exo process was favored for non-substituted alkynes whereas the endo pathway was generally observed for substituted alkynes. Then, the presence of electron-withdrawing groups on the aryl substituted alkyne increased the ratio of the exo isomer. DFT calculations were performed on stability of intermediates and corroborated the intervention of InCl3.
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5
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Abstract
AbstractThis review updates the field of enantioselective indium-catalyzed transformations of all types since 2012. It shows that asymmetric indium catalysis, that suits the growing demand for greener processes, offers a real opportunity to replace toxic metals in the near future.1 Introduction2 Allylations, Propargylations, and Allenylations of Carbonyl Compounds and Derivatives2.1 Allylations2.2 Propargylations and Allenylations3 Cycloadditions3.1 Hetero-Diels–Alder Cycloadditions3.2 1,3-Dipolar Cycloadditions4 Miscellaneous Reactions5 Domino and Tandem Reactions6 Conclusion
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6
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Sahu AK, Unnava R, Shit S, Saikia AK. In(OTf) 3-Catalyzed One-Pot Tandem Mannich and Conia-Ene Cyclization Reaction of N-Propargyl Amido Alcohols with 1,3-Dicarbonyl Compounds: An Approach To Construct Tetrahydro-1 H-pyrrolo[2,1- a]isoindolone-1,1-dicarboxylate and Its Application. J Org Chem 2020; 85:1961-1971. [PMID: 31912735 DOI: 10.1021/acs.joc.9b02686] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A one-pot tandem reaction has been developed for the synthesis of substituted tetrahydropyrroloisoindolone via Mannich reaction of N-propargyl amido alcohols with 1,3-dicarbonyl compounds followed by Conia-ene cyclization reaction in moderate to good yields catalyzed by indium(III)triflate [In(OTf)3]. The reaction is highly regioselective with an exo-cyclic double bond in the pyrrolidine ring. The substituted tetrahydropyrroloisoindolone can be converted to 5H-pyrrolo[2,1-a]isoindol-5-one via decarboxylative aromatization reaction.
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Affiliation(s)
- Archana Kumari Sahu
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Ramanjaneyulu Unnava
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Sudip Shit
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Anil K Saikia
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
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7
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Ling J, Mara D, Roure B, Laugeois M, Vitale MR. Copper(I)-Catalyzed Dearomative (3 + 2) Cycloaddition of 3-Nitroindoles with Propargylic Nucleophiles: An Access to Cyclopenta[b]indolines. J Org Chem 2020; 85:3838-3848. [DOI: 10.1021/acs.joc.9b03459] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Johanne Ling
- Institute of Chemistry for Life and Health Sciences, PSL Université Paris, CNRS, Chimie ParisTech., 11 rue Pierre et Marie Curie, 75005 Paris, France
| | - David Mara
- Institute of Chemistry for Life and Health Sciences, PSL Université Paris, CNRS, Chimie ParisTech., 11 rue Pierre et Marie Curie, 75005 Paris, France
| | - Baptiste Roure
- Institute of Chemistry for Life and Health Sciences, PSL Université Paris, CNRS, Chimie ParisTech., 11 rue Pierre et Marie Curie, 75005 Paris, France
| | - Maxime Laugeois
- Institute of Chemistry for Life and Health Sciences, PSL Université Paris, CNRS, Chimie ParisTech., 11 rue Pierre et Marie Curie, 75005 Paris, France
| | - Maxime R. Vitale
- Institute of Chemistry for Life and Health Sciences, PSL Université Paris, CNRS, Chimie ParisTech., 11 rue Pierre et Marie Curie, 75005 Paris, France
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8
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Cozzi PG, Gualandi A, Potenti S, Calogero F, Rodeghiero G. Asymmetric Reactions Enabled by Cooperative Enantioselective Amino- and Lewis Acid Catalysis. Top Curr Chem (Cham) 2019; 378:1. [PMID: 31761979 DOI: 10.1007/s41061-019-0261-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Accepted: 10/22/2019] [Indexed: 01/04/2023]
Abstract
Organocatalysis-the branch of catalysis featuring small organic molecules as the catalysts-has, in the last decade, become of central importance in the field of asymmetric catalysis, so much that it is now comparable to metal catalysis and biocatalysis. Organocatalysis is rationalized and classified by a number of so-called activation modes, based on the formation of a covalent or not-covalent intermediate between the organocatalyst and the organic substrate. Among all the organocatalytic activation modes, enamine and iminium catalysis are widely used for the practical preparation of valuable products and intermediates, both in academic and industrial contexts. In both cases, chiral amines are employed as catalysts. Enamine activation mode is generally employed in the reaction with electrophiles, while nucleophiles require the iminium activation mode. Commonly, in both modes, the reaction occurs through well-organized transitions states. A large variety of partners can react with enamines and iminium ions, due to their sufficient nucleophilicity and electrophilicity, respectively. However, despite the success, organocatalysis still suffers from narrow scopes and applications. Multicatalysis is a possible solution for these drawbacks because the two different catalysts can synergistically activate the substrates, with a simultaneous activation of the two different reaction partners. In particular, in this review we will summarize the reported processes featuring Lewis acid catalysis and organocatalytic activation modes synergically acting and not interfering with each other. We will focus our attention on the description of processes in which good results cannot be achieved independently by organocatalysis or Lewis acid catalysis. In these examples of cooperative dual catalysis, a number of new organic transformations have been developed. The review will focus on the possible strategies, the choice of the Lewis acid and the catalytic cycles involved in the effective reported combination. Additionally, some important key points regarding the rationale for the effective combinations will be also included. π-Activation of organic substrates by Lewis acids, via formation of electrophilic intermediates, and their reaction with enamines will be also discussed in this review.
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Affiliation(s)
- Pier Giorgio Cozzi
- Dipartimento di Chimica "G. Ciamician", Alma Mater Studiorum, Università di Bologna, Via Selmi 2, Bologna, Italy.
| | - Andrea Gualandi
- Dipartimento di Chimica "G. Ciamician", Alma Mater Studiorum, Università di Bologna, Via Selmi 2, Bologna, Italy
| | - Simone Potenti
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126, Pisa, Italy
| | - Francesco Calogero
- Dipartimento di Chimica "G. Ciamician", Alma Mater Studiorum, Università di Bologna, Via Selmi 2, Bologna, Italy
| | - Giacomo Rodeghiero
- Dipartimento di Chimica "G. Ciamician", Alma Mater Studiorum, Università di Bologna, Via Selmi 2, Bologna, Italy
- Cyanagen Srl, Via Stradelli Guelfi 40/C, 40138, Bologna, Italy
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9
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Afewerki S, Córdova A. Enamine/Transition Metal Combined Catalysis: Catalytic Transformations Involving Organometallic Electrophilic Intermediates. Top Curr Chem (Cham) 2019; 377:38. [PMID: 31732819 PMCID: PMC6858407 DOI: 10.1007/s41061-019-0267-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 11/05/2019] [Indexed: 12/15/2022]
Abstract
The concept of merging enamine activation catalysis with transition metal catalysis is an important strategy, which allows for selective chemical transformations not accessible without this combination. The amine catalyst activates the carbonyl compounds through the formation of a reactive nucleophilic enamine intermediate and, in parallel, the transition metal activates a wide range of functionalities such as allylic substrates through the formation of reactive electrophilic π-allyl-metal complex. Since the first report of this strategy in 2006, considerable effort has been devoted to the successful advancement of this technology. In this chapter, these findings are highlighted and discussed.
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Affiliation(s)
- Samson Afewerki
- Department of Natural Sciences, Mid Sweden University, 851 70, Sundsvall, Sweden.
| | - Armando Córdova
- Department of Natural Sciences, Mid Sweden University, 851 70, Sundsvall, Sweden.
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10
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Carrër A, Turban S, Provost N, Caliez A, Lamarche G, Zanirato G, Beucher M, Pean C, Mirguet O, Perron-Sierra F, Michelet V. Juniperanol: First total synthesis and evaluation in Type 2 Diabetes disease. Bioorg Chem 2019; 92:103243. [PMID: 31518756 DOI: 10.1016/j.bioorg.2019.103243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 08/31/2019] [Accepted: 08/31/2019] [Indexed: 01/19/2023]
Abstract
The first total synthesis of juniperanol, the tricyclic sesquiterpenoid enantiomer of α-cedrol is described. The synthesis relies on stereoselective gold-catalyzed Ohloff-type propargylic ester rearrangement performed on a 10 g scale, and a carbocationic cascade in the presence of acetyl methanesulfonate. The ability of juniperanol to interfere in glucose processes in different cell types is described.
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Affiliation(s)
- A Carrër
- PSL Research University, Chimie ParisTech-CNRS, Institut de Recherche de Chimie Paris, 11 rue P. et M. Curie, 75005 Paris, France
| | - S Turban
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - N Provost
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - A Caliez
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - G Lamarche
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - G Zanirato
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - M Beucher
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - C Pean
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - O Mirguet
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - F Perron-Sierra
- Institut de Recherches Servier, 125 Chemin de Ronde, 78290 Croissy-Seine, France
| | - V Michelet
- PSL Research University, Chimie ParisTech-CNRS, Institut de Recherche de Chimie Paris, 11 rue P. et M. Curie, 75005 Paris, France; University Côte d'Azur, Institut de Chimie de Nice, Parc Valrose, Faculté des Sciences, 06100 Nice, France
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11
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Trost BM, Kalnmals CA. Sulfones as Synthetic Linchpins: Transition‐Metal‐Free sp
3
–sp
2
and sp
2
–sp
2
Cross‐Couplings Between Geminal Bis(sulfones) and Organolithium Compounds. Chemistry 2018; 24:9066-9074. [PMID: 29543985 DOI: 10.1002/chem.201800118] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry Stanford University Stanford CA 94305 USA
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12
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Li S, Lv J, Luo S. Enantioselective indium(i)-catalyzed [4 + 2] annulation of alkoxyallenes and β,γ-unsaturated α-keto esters. Org Chem Front 2018. [DOI: 10.1039/c8qo00319j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An indium(i)–chiral phosphoric acid complex was found to catalyze the enantioselective [4 + 2] annulation reaction of β,γ-unsaturated α-keto esters with alkoxyallenes, affording cyclic O,O-acetals in good yields and with high regio- and stereo-selectivities.
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Affiliation(s)
- Sujia Li
- Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Jian Lv
- Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Sanzhong Luo
- Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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13
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Manzano R, Datta S, Paton RS, Dixon DJ. Enantioselective Silver and Amine Co-catalyzed Desymmetrizing Cycloisomerization of Alkyne-Linked Cyclohexanones. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612048] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Rubén Manzano
- Department of Chemistry, Chemistry Research Laboratory; University of Oxford; Mansfield Road Oxford OX1 3TA UK
| | - Swarup Datta
- Department of Chemistry, Chemistry Research Laboratory; University of Oxford; Mansfield Road Oxford OX1 3TA UK
| | - Robert S. Paton
- Department of Chemistry, Chemistry Research Laboratory; University of Oxford; Mansfield Road Oxford OX1 3TA UK
| | - Darren J. Dixon
- Department of Chemistry, Chemistry Research Laboratory; University of Oxford; Mansfield Road Oxford OX1 3TA UK
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14
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Manzano R, Datta S, Paton RS, Dixon DJ. Enantioselective Silver and Amine Co-catalyzed Desymmetrizing Cycloisomerization of Alkyne-Linked Cyclohexanones. Angew Chem Int Ed Engl 2017; 56:5834-5838. [PMID: 28429384 DOI: 10.1002/anie.201612048] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Revised: 03/02/2017] [Indexed: 01/23/2023]
Abstract
A silver(I) and amine co-catalyzed desymmetrization of 4-propargylamino cyclohexanones for the direct enantioselective synthesis of 2-azabicyclo[3.3.1]nonanes is described. Exploiting reactivity arising from dual activation of the pendant terminal alkyne by silver(I) and the ketone moiety through transient enamine formation, this synthetically relevant transformation is easy to perform, efficient and broad in scope. High enantioselectivity (up to 96 % ee) was achieved by exploiting a significant matching effect between the chirality of a cinchona alkaloid-derived aminophosphine ligand for the silver(I) salt and the 2-bis(aryl)methylpyrrolidine catalyst which was rationalized by DFT calculations. This allowed for the preparation of both enantiomers of the bicyclic product with near-identical stereocontrol.
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Affiliation(s)
- Rubén Manzano
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Swarup Datta
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Robert S Paton
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Darren J Dixon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
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15
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Afewerki S, Córdova A. Combinations of Aminocatalysts and Metal Catalysts: A Powerful Cooperative Approach in Selective Organic Synthesis. Chem Rev 2016; 116:13512-13570. [PMID: 27723291 DOI: 10.1021/acs.chemrev.6b00226] [Citation(s) in RCA: 322] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The cooperation and interplay between organic and metal catalyst systems is of utmost importance in nature and chemical synthesis. Here innovative and selective cooperative catalyst systems can be designed by combining two catalysts that complement rather than inhibit one another. This refined strategy can permit chemical transformations unmanageable by either of the catalysts alone. This review summarizes innovations and developments in selective organic synthesis that have used cooperative dual catalysis by combining simple aminocatalysts with metal catalysts. Considerable efforts have been devoted to this fruitful field. This emerging area employs the different activation modes of amine and metal catalysts as a platform to address challenging reactions. Here, aminocatalysis (e.g., enamine activation catalysis, iminium activation catalysis, single occupied molecular orbital (SOMO) activation catalysis, and photoredox activation catalysis) is employed to activate unreactive carbonyl substrates. The transition metal catalyst complements by activating a variety of substrates through a range of interactions (e.g., electrophilic π-allyl complex formation, Lewis acid activation, allenylidene complex formation, photoredox activation, C-H activation, etc.), and thereby novel concepts within catalysis are created. The inclusion of heterogeneous catalysis strategies allows for "green" chemistry development, catalyst recyclability, and the more eco-friendly synthesis of valuable compounds.
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Affiliation(s)
- Samson Afewerki
- Department of Natural Sciences, Mid Sweden University , SE-851 70 Sundsvall, Sweden.,Berzelii Center EXSELENT, The Arrhenius Laboratory, Stockholm University , SE-106 91 Stockholm, Sweden
| | - Armando Córdova
- Department of Natural Sciences, Mid Sweden University , SE-851 70 Sundsvall, Sweden.,Berzelii Center EXSELENT, The Arrhenius Laboratory, Stockholm University , SE-106 91 Stockholm, Sweden
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16
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Laugeois M, Ponra S, Ratovelomanana-Vidal V, Michelet V, Vitale MR. Asymmetric preparation of polysubstituted cyclopentanes by synergistic Pd(0)/amine catalyzed formal [3+2] cycloadditions of vinyl cyclopropanes with enals. Chem Commun (Camb) 2016; 52:5332-5. [PMID: 27005726 DOI: 10.1039/c6cc01775d] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report herein a novel diastereo- and enantiocontrolled preparation of polysubstituted cyclopentanes by the formal [3+2] cycloadditions of vinyl cyclopropanes with enals. In constrast with previously developed strategies, our original approach is based on the synergistic merger of iminium/enamine organocatalysis with palladium(0) catalysis.
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Affiliation(s)
- Maxime Laugeois
- PSL Research University, Chimie ParisTech - CNRS, Institut de Recherche de Chimie Paris, Paris, 75005, France.
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17
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Arcadi A, Chiarini M, Vecchio LD, Marinelli F, Michelet V. Silver- versus gold-catalyzed sequential oxidative cyclization of unprotected 2-alkynylanilines with oxone. Chem Commun (Camb) 2016; 52:1458-61. [DOI: 10.1039/c5cc08543h] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Divergent catalytic activity of gold and silver complexes towards domino oxidative cyclization reactions of unprotected 2-alkynylanilines.
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Affiliation(s)
- A. Arcadi
- Dipartimento di Scienze Fisiche e Chimiche
- Università di L'Aquila
- Italy
| | - M. Chiarini
- Facoltà di Bioscienze e Tecnologie Agro-alimentari e Ambientali
- Università di Teramo
- 64023-Mosciano Sant'Angelo (Te)
- Italy
| | - L. Del Vecchio
- Dipartimento di Scienze Fisiche e Chimiche
- Università di L'Aquila
- Italy
- PSL Research University
- Chimie ParisTech-CNRS
| | - F. Marinelli
- Dipartimento di Scienze Fisiche e Chimiche
- Università di L'Aquila
- Italy
| | - V. Michelet
- PSL Research University
- Chimie ParisTech-CNRS
- Institut de Recherche de Chimie Paris
- 75005 Paris
- France
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18
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Ponra S, Vitale MR, Michelet V, Ratovelomanana-Vidal V. HNTf2-Catalyzed Regioselective Preparation of Polysubstituted Naphthalene Derivatives Through Alkyne–Aldehyde Coupling. J Org Chem 2015; 80:3250-7. [DOI: 10.1021/acs.joc.5b00353] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sudipta Ponra
- PSL Research University, Chimie ParisTech - CNRS, Institut de Recherche de Chimie Paris, 75005, Paris, France
| | - Maxime R. Vitale
- PSL Research University, Chimie ParisTech - CNRS, Institut de Recherche de Chimie Paris, 75005, Paris, France
| | - Véronique Michelet
- PSL Research University, Chimie ParisTech - CNRS, Institut de Recherche de Chimie Paris, 75005, Paris, France
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19
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Gualandi A, Mengozzi L, Wilson CM, Cozzi PG. Synergy, Compatibility, and Innovation: Merging Lewis Acids with Stereoselective Enamine Catalysis. Chem Asian J 2014; 9:984-95. [DOI: 10.1002/asia.201301549] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Indexed: 01/03/2023]
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20
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Obradors C, Echavarren AM. Intriguing mechanistic labyrinths in gold(I) catalysis. Chem Commun (Camb) 2014; 50:16-28. [PMID: 24176910 PMCID: PMC4162457 DOI: 10.1039/c3cc45518a] [Citation(s) in RCA: 273] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Accepted: 10/16/2013] [Indexed: 12/14/2022]
Abstract
Many mechanistically intriguing reactions have been developed in the last decade using gold(I) as catalyst. Here we review the main mechanistic proposals in gold-catalysed activation of alkynes and allenes, in which this metal plays a central role by stabilising a variety of complex cationic intermediates.
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Affiliation(s)
- Carla Obradors
- Institute of Chemical Research of Catalonia (ICIQ) , Av. Països Catalans 16 , 43007 Tarragona , Spain .
| | - Antonio M. Echavarren
- Institute of Chemical Research of Catalonia (ICIQ) , Av. Països Catalans 16 , 43007 Tarragona , Spain .
- Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , C/Marcel. li Domingo s/n , 43007 Tarragona , Spain
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21
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Deng Y, Kumar S, Wang H. Synergistic–cooperative combination of enamine catalysis with transition metal catalysis. Chem Commun (Camb) 2014; 50:4272-84. [DOI: 10.1039/c4cc00072b] [Citation(s) in RCA: 138] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This review article highlights recent discoveries in synergistic–cooperative combination of enamine catalysis with transition metal catalysis.
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Affiliation(s)
- Yongming Deng
- Department of Chemistry and Biochemistry
- Miami University
- Oxford, USA
| | - Siddhartha Kumar
- Department of Chemistry and Biochemistry
- Miami University
- Oxford, USA
| | - Hong Wang
- Department of Chemistry and Biochemistry
- Miami University
- Oxford, USA
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