1
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Gupta A, Rahaman A, Bhadra S. Bioinspired Functionalization of Carbonyl Compounds Enabled by Metal Chelated Bifunctional Ligands. Chemistry 2024; 30:e202302812. [PMID: 37807759 DOI: 10.1002/chem.202302812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/29/2023] [Accepted: 10/04/2023] [Indexed: 10/10/2023]
Abstract
In Nature, enzymatic reactions proceed through exceptionally ordered transition states giving rise to extraordinary levels of stereoselection. In those reactions, the active site of the enzyme plays crucial roles - through one position, it holds the substrate in the proximity to the reaction epicentre that facilitates both the reactivity and stereoselectivity of the chemical process. Inspired by this natural phenomenon, synthetic chemists have designed bifunctional ligands that not only coordinate to a metal centre but also preassociate with an organic substrate, for example aldehyde and ketone, and exerts stereodirecting influence to accelerate the attack of the incoming reacting partner from a particular enantiotopic face. The chief goal of the current review is to give an overview of the recently developed approaches enabled by privileged bio-inspired bifunctional ligands that not only bind to the metal catalyst but also activates carbonyl substrates via organocatalysis, thereby easing in the new bond forming step. As carbonyl α-functionalizations are dominated by enamine and enolate chemistry, the current review primarily focusses on enamine- and enolate-metal catalysis by bifunctional ligands. Thus, developments based on traditional cooperative catalysis occurring through two directly coupled but independent catalytic cycles of an organocatalyst and a metal catalyst are not covered.
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Affiliation(s)
- Aniket Gupta
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, GB Marg, 364002, Bhavnagar, India
- Academy of Scientific and Innovative Research (AcSIR), 201002, Ghaziabad, India
- Current address: School of Chemistry, The University of Birmingham, B15 2TT, Birmingham, UK
| | - Ajijur Rahaman
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, GB Marg, 364002, Bhavnagar, India
- Academy of Scientific and Innovative Research (AcSIR), 201002, Ghaziabad, India
| | - Sukalyan Bhadra
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, GB Marg, 364002, Bhavnagar, India
- Academy of Scientific and Innovative Research (AcSIR), 201002, Ghaziabad, India
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2
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Davis J, Gharaee M, Karunaratne CV, Cortes Vazquez J, Haynes M, Luo W, Nesterov VN, Cundari T, Wang H. Asymmetric Synthesis of Chromans Through Bifunctional Enamine-Metal Lewis Acid Catalysis. Chemistry 2022; 28:e202200224. [PMID: 35298095 DOI: 10.1002/chem.202200224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Indexed: 11/09/2022]
Abstract
Cooperative enamine-metal Lewis acid catalysis has emerged as a powerful tool to construct carbon-carbon and carbon-heteroatom bond forming reactions. A concise synthetic method for asymmetric synthesis of chromans from cyclohexanones and salicylaldehydes has been developed to afford tricyclic chromans containing three consecutive stereogenic centers in good yields (up to 87 %) and stereoselectivity (up to 99 % ee and 11 : 1 : 1 dr). This difficult organic transformation was achieved through bifunctional enamine-metal Lewis acid catalysis. It is believed that the strong activation of the salicylaldehydes through chelating to the metal Lewis acid and the bifunctional nature of the catalyst accounts for the high yields and enantioselectivity of the reaction. The absolute configurations of the chroman products were established through X-ray crystallography. DFT calculations were conducted to understand the mechanism and stereoselectivity of this reaction.
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Affiliation(s)
- Jacqkis Davis
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | - Mojgan Gharaee
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | | | | | - Mikayla Haynes
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | - Weiwei Luo
- School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | | | - Thomas Cundari
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | - Hong Wang
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
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3
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Zhang Q, Li Y, Zhang L, Luo S. Catalytic Asymmetric Disulfuration by a Chiral Bulky Three‐Component Lewis Acid‐Base. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101569] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Qi Zhang
- Key Laboratory of Molecular Recognition and Function Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- Department of Chemistry University of Chinese Academy of Sciences Beijing 100490 China
| | - Yao Li
- Center of Basic Molecular Science Department of Chemistry Tsinghua University Beijing China
| | - Long Zhang
- Center of Basic Molecular Science Department of Chemistry Tsinghua University Beijing China
| | - Sanzhong Luo
- Center of Basic Molecular Science Department of Chemistry Tsinghua University Beijing China
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4
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Zhang Q, Li Y, Zhang L, Luo S. Catalytic Asymmetric Disulfuration by a Chiral Bulky Three-Component Lewis Acid-Base. Angew Chem Int Ed Engl 2021; 60:10971-10976. [PMID: 33660896 DOI: 10.1002/anie.202101569] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/02/2021] [Indexed: 01/07/2023]
Abstract
A three-component Lewis acid-base (Lewis trio) involving a bulky chiral primary amine, B(C6 F5 )3 and a bulky tertiary amine has been developed as an effective enamine catalyst for enantioselective disulfuration reactions. The bulky tertiary amine was found to activate a bulky primary-tertiary diamine-borane Lewis pair for enamine catalysis via frustrated interaction. The resulted chiral bulky Lewis trio (BLT) allows for the construction of chiral disulfides via direct disulfuration with β-ketocarbonyls or α-branched aldehydes in a practical and highly stereocontrolled manner.
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Affiliation(s)
- Qi Zhang
- Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,Department of Chemistry, University of Chinese Academy of Sciences, Beijing, 100490, China
| | - Yao Li
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Long Zhang
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Sanzhong Luo
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
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Abstract
The proline-catalysed asymmetric aldol reaction is usually carried out in highly dipolar aprotic solvents (dimethylsulfoxide, dimethylformamide, acetonitrile) where proline presents an acceptable solubility. Protic solvents are generally characterized by poor stereocontrol (e.g., methanol) or poor reactivity (e.g., water). Here, we report that water/methanol mixtures are exceptionally simple and effective reaction media for the intermolecular organocatalytic aldol reaction using the simple proline as the catalyst.
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6
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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: 45] [Impact Index Per Article: 9.0] [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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7
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Fallek A, Portnoy M. The Use of Lewis Acids for Repairing Chemoselectivity of the Organocatalyzed Morita‐Baylis‐Hillman Reaction. ChemistrySelect 2019. [DOI: 10.1002/slct.201900157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Amit Fallek
- School of ChemistryRaymond and Beverly Sackler Faculty of Exact SciencesTel Aviv University Tel Aviv 699678 Israel
| | - Moshe Portnoy
- School of ChemistryRaymond and Beverly Sackler Faculty of Exact SciencesTel Aviv University Tel Aviv 699678 Israel
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8
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Chen X, Lin C, Du H, Xu J. Efficient Direct Synthesis of Aziridine‐Containing Chiral Tridentate Ligands by the Iminium‐Mediated Self‐Ring Opening Reaction of Enantiopure Aziridines and Salicylaldehydes. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801545] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Xingpeng Chen
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of ScienceBeijing University of Chemical Technology Beijing 100029 People's Republic of China
| | - Chao Lin
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of ScienceBeijing University of Chemical Technology Beijing 100029 People's Republic of China
| | - Hongguang Du
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of ScienceBeijing University of Chemical Technology Beijing 100029 People's Republic of China
| | - Jiaxi Xu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, Faculty of ScienceBeijing University of Chemical Technology Beijing 100029 People's Republic of China
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9
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DFT-assisted design and evaluation of bifunctional copper(I) catalysts for the direct intermolecular addition of aldehydes and ketones to alkynes. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.07.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Su Z, Zuo Y, Hu C. Theoretical Investigation on Direct Vinylogous Aldol Reaction of Isatin Catalyzed by Chiral- N , N' -dioxide Sc(III) Complex. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.04.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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11
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Three Polyhydroxyl-Bridged Defective Dicubane Tetranuclear MnIII Complexes: Synthesis, Crystal Structures, and Spectroscopic Properties. CRYSTALS 2018. [DOI: 10.3390/cryst8070272] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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12
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Li Y, Zhang R, Bi X, Fu J. Multifunctionalization of Unactivated Cyclic Ketones via Synergistic Catalysis of Copper and Diarylamine: Access to Cyclic α-Enaminone. Org Lett 2018; 20:1207-1211. [PMID: 29420046 DOI: 10.1021/acs.orglett.8b00125] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A multifunctionalization of unactivated cyclic ketones via synergistic catalysis of copper and diarylamine for the direct synthesis of cyclic α-enaminone is reported for the first time. This reaction goes through oxidative α-amination, followed by a desaturation, and features mild reaction conditions, a broad substrate scope, and great functional group tolerance.
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Affiliation(s)
- Yang Li
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China
| | - Ran Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China
| | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Junkai Fu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China.,Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School , Shenzhen 518055, China
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13
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Serra-Pont A, Alfonso I, Solà J, Jimeno C. A copper-templated, bifunctional organocatalyst: a strongly cooperative dynamic system for the aldol reaction. Org Biomol Chem 2018; 15:6584-6591. [PMID: 28749514 DOI: 10.1039/c7ob01370a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The study of novel metal-templated dynamic organocatalytic systems has led to the identification of CuSO4 as the most efficient template to assemble monofunctional prolinamide- and thiourea-modified pyridine ligands. The structural and electronic requirements to assemble an efficient catalyst have been disclosed: both pyridine ligands must bear a 1,3-substitution pattern, and the thiourea ligand serves as a reducing agent to copper(i) as well. Eventually, the cooperative effects achieved with such a simple system deliver high reaction rates and stereoselectivities at room temperature in the asymmetric aldol reaction, requiring only 1 mol% of copper salt.
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Affiliation(s)
- Anna Serra-Pont
- Department of Biological Chemistry and Molecular Modelling, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18-26, E08034 Barcelona, Spain.
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14
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Álvarez-Miguel L, Barbero H, Sacristán-Martín A, Martín Álvarez JM, Pérez-Encabo A, Álvarez CM, García-Rodríguez R, Miguel D. Copper Complexes in the Promotion of Aldol Addition to Pyridine-2-carboxaldehyde: Synthesis of Homo- and Heteroleptic Complexes and Stereoselective Double Aldol Addition. Inorg Chem 2018; 57:264-276. [PMID: 29227100 DOI: 10.1021/acs.inorgchem.7b02448] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
CuCl2·2H2O and Cu(ClO4)2·6H2O are able to promote aldol addition of pyridine-2-carboxaldehyde (pyca) with acetone, acetophenone, or cyclohexenone under neutral and mild conditions. The general and simple one-pot procedure for the aldol addition to Cu(II) complexes accesses novel Cu complexes with a large variety of different structural motifs, from which the aldol-addition ligand can be liberated by treatment with NH3. Neutral heteroleptic complexes in which the ligand acts as bidentate, or homoleptic cationic complexes in which the ligand acts as tridentate can be obtained depending on the copper salt used. The key step in these reactions is the coordination of pyca to copper, which increases the electrophilic character of the aldehyde, with Cu(ClO4)2 leading to a higher degree of activation than CuCl2, as predicted by DFT calculations. A regio- and stereoselective double aldol addition of pyca in the reaction of Cu(ClO4)2·6H2O with acetone leads to the formation of a dimer copper complex in which the novel double aldol addition product acts as a pentadentate ligand. A possible mechanism is discussed. The work is supported by extensive crystallographic studies.
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Affiliation(s)
- Lucía Álvarez-Miguel
- GIR MIOMeT/IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, E-47011 Valladolid, Spain
| | - Héctor Barbero
- GIR MIOMeT/IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, E-47011 Valladolid, Spain
| | - Adriana Sacristán-Martín
- GIR MIOMeT/IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, E-47011 Valladolid, Spain
| | - José M Martín Álvarez
- GIR MIOMeT/IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, E-47011 Valladolid, Spain
| | - Alfonso Pérez-Encabo
- IU CINQUIMA/Química Orgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, E-47011 Valladolid, Spain
| | - Celedonio M Álvarez
- GIR MIOMeT/IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, E-47011 Valladolid, Spain
| | - Raúl García-Rodríguez
- GIR MIOMeT/IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, E-47011 Valladolid, Spain
| | - Daniel Miguel
- GIR MIOMeT/IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, E-47011 Valladolid, Spain
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15
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Yamashita Y, Yasukawa T, Yoo WJ, Kitanosono T, Kobayashi S. Catalytic enantioselective aldol reactions. Chem Soc Rev 2018; 47:4388-4480. [DOI: 10.1039/c7cs00824d] [Citation(s) in RCA: 165] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recent developments in catalytic asymmetric aldol reactions have been summarized.
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Affiliation(s)
- Yasuhiro Yamashita
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Tomohiro Yasukawa
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Woo-Jin Yoo
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Taku Kitanosono
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Shū Kobayashi
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
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16
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Chandra Mohan D, Sadhukha A, Maayan G. A metallopeptoid as an efficient bioinspired cooperative catalyst for the aerobic oxidative synthesis of imines. J Catal 2017. [DOI: 10.1016/j.jcat.2017.09.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Li YQ, Zhou Q, Wang DL, Wang P, Lu Y, Liu Y. Co-catalysis for one-pot tandem hydroformylation-aldol condensation-hydrogenation with involvement of phosphino-phosphonium based bi-functional ligand and aniline. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.06.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Yu B, Sun YX, Yang CJ, Guo JQ, Li J. Synthesis and Crystal Structures of an Unexpected Tetranuclear Zinc(II) Complex and a Benzoquinone Compound Derived from ZnII- and CdII-Promoted Reactivity of Schiff Base Ligands. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700034] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Bin Yu
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; 730070 Lanzhou P. R. China
| | - Yin-Xia Sun
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; 730070 Lanzhou P. R. China
| | - Cheng-Juan Yang
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; 730070 Lanzhou P. R. China
| | - Jian-Qiang Guo
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; 730070 Lanzhou P. R. China
| | - Jing Li
- School of Chemical and Biological Engineering; Lanzhou Jiaotong University; 730070 Lanzhou P. R. China
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19
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Ye F, Haddad M, Ratovelomanana-Vidal V, Michelet V. Ruthenium-Catalyzed [2 + 2 + 2] Cycloaddition Reaction Forming 2-Aminopyridine Derivatives from α,ω-Diynes and Cyanamides. Org Lett 2017; 19:1104-1107. [PMID: 28225282 DOI: 10.1021/acs.orglett.7b00130] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A novel, efficient, and mild synthetic route for the preparation of 2-aminopyridines via ruthenium-mediated [2 + 2 + 2] cycloaddition of α,ω-diynes and cyanamides has been developed. This atom-economical catalytic process demonstrated remarkable regioselectivities to access pyridine derivatives of high synthetic utility.
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Affiliation(s)
- Fei Ye
- PSL Research University, Chimie ParisTech - CNRS , Institut de Recherche de Chimie Paris, Paris 75005, France
| | - Mansour Haddad
- PSL Research University, Chimie ParisTech - CNRS , Institut de Recherche de Chimie Paris, Paris 75005, France
| | | | - Véronique Michelet
- PSL Research University, Chimie ParisTech - CNRS , Institut de Recherche de Chimie Paris, Paris 75005, France
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20
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Poddar R, Jain A, Kidwai M. Bis[(l)prolinate-N,O]Zn: A water-soluble and recycle catalyst for various organic transformations. J Adv Res 2017; 8:245-270. [PMID: 28289549 PMCID: PMC5338870 DOI: 10.1016/j.jare.2016.12.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 11/28/2016] [Accepted: 12/20/2016] [Indexed: 11/17/2022] Open
Abstract
Under the green chemistry perspective, bis[(l)prolinate-N,O]Zn (also called zinc-proline or Zn[(l)-pro]2) has proven its competence as a promising alternative in a plethora of applications such as catalyst or promoter. Owing to its biodegradable and non-toxic nature of bis[(l)prolinate-N,O]Zn, it is being actively investigated as a water soluble green catalyst for synthetic chemistry. Bis[(l)prolinate-N,O]Zn are readily utilized under mild conditions and have high selectivity and reactivity with broad range of substrate acceptance to make it better reaction medium for a wide variety of organic transformations. This Review summarizes the till date literature on its synthesis, characterization, and its catalytic role in various organic reactions.
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Affiliation(s)
- Roona Poddar
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Arti Jain
- Department of Chemistry, Daulat Ram College, University of Delhi, Delhi 110007, India
| | - Mazaahir Kidwai
- Department of Chemistry, University of Delhi, Delhi 110007, India
- Corresponding author. Fax: +91 1127666235.
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21
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Ye F, Haddad M, Michelet V, Ratovelomanana-Vidal V. Solvent-free ruthenium trichloride-mediated [2 + 2 + 2] cycloaddition of α,ω-diynes and cyanamides: a convenient access to 2-aminopyridines. Org Chem Front 2017. [DOI: 10.1039/c7qo00058h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A convenient access to functionalized 2-aminopyridinesviaa solventless Ru-catalyzed [2 + 2 + 2] cycloaddition reaction of α,ω-diynes and cyanamides is described.
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Affiliation(s)
- Fei Ye
- PSL
- Research University
- Chimie ParisTech – CNRS
- Institut de Recherche de Chimie Paris
- 75005 Paris
| | - Mansour Haddad
- PSL
- Research University
- Chimie ParisTech – CNRS
- Institut de Recherche de Chimie Paris
- 75005 Paris
| | - Véronique Michelet
- PSL
- Research University
- Chimie ParisTech – CNRS
- Institut de Recherche de Chimie Paris
- 75005 Paris
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22
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Fang L, Lv C, Wang G, Feng L, Stavropoulos P, Gao G, Ai L, Zhang J. Discrimination of Enantiomers of Dipeptide Derivatives with Two Chiral Centers by Tetraaza Macrocyclic Chiral Solvating Agents Using 1H NMR Spectroscopy. Org Chem Front 2016; 3:1716-1724. [PMID: 28191319 PMCID: PMC5300753 DOI: 10.1039/c6qo00521g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
1H NMR spectroscopy is often used to discriminate enantiomers of chiral analytes and determine their enantiomeric excess (ee) by various chiral auxiliaries. In reported research, these studies were mainly focused on chiral discriminantion of chiral analytes with only one chiral center. However, many chiral compounds possessing two or more chiral centers are often found in natural products, chiral drugs, products of asymmetric synthesis and biological systems. Therefore, it is necessary to investigate their chiral discrimination by effective chiral auxiliaries using 1H NMR spectroscopy. In this paper, a new class of tetraaza macrocyclic chiral solvating agents (TAMCSAs) with two amide (CONH), two amino (NH) and two phenolic hydroxyl (PhOH) groups has been designed and synthsized for chiral discrimination towards dipeptide derivatives with two chiral centers. These dipeptide derivatives are important chiral species because some of them are used as clinical drugs and special dietary supplements for treatment of human diseases, such as L-alanyl-L-glutamine and aspartame. The results show that these TAMCSAs have excellent chiral discriminating properties and offer multiple detection possibilities pertaining to 1H NMR signals of diagnostic split protons. The nonequivalent chemical shifts (up to 0.486 ppm) of various types of protons of these dipeptide derivatives were evaluated with the assistance of well-resolved 1H NMR signals in most cases. In addition, enantiomeric excesses (ee) of the dipeptide derivatives with different optical compositions have been calculated based on integration of well-separeted proton signals. At the same time, the possible chiral discriminating behaviors have been discussed by means of Job plots, ESI mass spectra and a proposed theoretical model of (±)-G1 with TAMCSA 1c. Additionally, the association constants of enantiomers of (±)-G5 with TAMCSA 1a were calculated by employing the nonlinear curve-fitting method.
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Affiliation(s)
- Lixia Fang
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Caixia Lv
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Guo Wang
- Department of Chemistry, Capital Normal University, Beijing 10048, P. R. China
| | - Lei Feng
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Pericles Stavropoulos
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409, USA
| | - Guangpeng Gao
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Lin Ai
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Jiaxin Zhang
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
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23
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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: 350] [Impact Index Per Article: 43.8] [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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24
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Wiedenhoeft D, Benoit AR, Wu Y, Porter JD, Meyle E, Yeung TH, Huff R, Lindeman SV, Dockendorff C. Multifunctional heterocyclic scaffolds for hybrid Lewis acid/Lewis base catalysis of carbon–carbon bond formation. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.05.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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25
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Wang P, Liu H, Li YQ, Zhao XL, Lu Y, Liu Y. Phosphonium-based aminophosphines as bifunctional ligands for sequential catalysis of one-pot hydroformylation–acetalization of olefins. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01827g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A series of ionic phosphonium-based aminophosphinesL1–L3were prepared and fully characterized, in each of which the involved bifunctional moieties of the phosphine fragment and Lewis acidic phosphonium were linked together by stable chemical bonds and bridged by one N-atom.
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Affiliation(s)
- Peng Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
| | - Huan Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
| | - Yong-Qi Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
| | - Xiao-Li Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
| | - Yong Lu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
| | - Ye Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
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26
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27
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Serra-Pont A, Alfonso I, Jimeno C, Solà J. Dynamic assembly of a zinc-templated bifunctional organocatalyst in the presence of water for the asymmetric aldol reaction. Chem Commun (Camb) 2015; 51:17386-9. [PMID: 26478115 DOI: 10.1039/c5cc07847d] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bifunctional organocatalytic system consisting of simple pyridine ligands containing separate catalytic functionalities was assembled using ZnCl2. This novel metal-templated catalyst furnished high yields and stereoselectivities towards the aldol reaction. The addition of controlled amounts of water turned out to be crucial to dissolve the system and achieve optimal results.
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Affiliation(s)
- Anna Serra-Pont
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Department of Biological Chemistry and Molecular Modelling, c/Jordi Girona 18-26, E08034 Barcelona, Spain.
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28
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Tan C, Wang P, Liu H, Zhao XL, Lu Y, Liu Y. Bifunctional ligands in combination with phosphines and Lewis acidic phospheniums for the carbonylative Sonogashira reaction. Chem Commun (Camb) 2015; 51:10871-4. [DOI: 10.1039/c5cc03697f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bifunctional ligands (L1–L4) in combination with Lewis acidic phosphenium(v) and phosphine have been developed for the carbonylative Sonogashira reaction.
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Affiliation(s)
- Chen Tan
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
| | - Peng Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
| | - Huan Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
| | - Xiao-Li Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
| | - Yong Lu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
| | - Ye Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- 200062 Shanghai
- China
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29
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Abstract
Metallopeptoid catalysts incorporating phenanthroline–copper and TEMPO, and at least one non-catalytic group perform in the oxidation of various benzylic, allylic and aliphatic primary alcohols with a TON of up to 16 times higher than a mixture of the two catalytic groups or the peptoid dimer that is lacking the non-catalytic group.
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Affiliation(s)
- Kaniraj Jeya Prathap
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Haifa
- Israel
| | - Galia Maayan
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Haifa
- Israel
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30
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Direct asymmetric aldol condensation catalyzed by aziridine semicarbazide zinc(II) complexes. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.131] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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31
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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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32
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Mlynarski J, Baś S. Catalytic asymmetric aldol reactions in aqueous media – a 5 year update. Chem Soc Rev 2014; 43:577-87. [DOI: 10.1039/c3cs60202h] [Citation(s) in RCA: 147] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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33
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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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34
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Amino oxazolines as a new class of organocatalyst for the direct intermolecular asymmetric aldol reaction between acetone and aromatic aldehydes. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.07.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Zhao Q, Li S, Huang K, Wang R, Zhang X. A Novel Chiral Bisphosphine-Thiourea Ligand for Asymmetric Hydrogenation of β,β-Disubstituted Nitroalkenes. Org Lett 2013; 15:4014-7. [DOI: 10.1021/ol401816y] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Qingyang Zhao
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China, and Department of Chemistry &Chemical Biology, Department of Medicinal Chemistry, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Shengkun Li
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China, and Department of Chemistry &Chemical Biology, Department of Medicinal Chemistry, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Kexuan Huang
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China, and Department of Chemistry &Chemical Biology, Department of Medicinal Chemistry, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Rui Wang
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China, and Department of Chemistry &Chemical Biology, Department of Medicinal Chemistry, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Xumu Zhang
- School of Life Sciences, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China, and Department of Chemistry &Chemical Biology, Department of Medicinal Chemistry, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
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36
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Du Z, Shao Z. Combining transition metal catalysis and organocatalysis – an update. Chem Soc Rev 2013; 42:1337-78. [DOI: 10.1039/c2cs35258c] [Citation(s) in RCA: 542] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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37
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M’thiruaine CM, Friedrich HB, Changamu EO, Omondi B. Regioselective reactions of electrophilic iron dicarbonyl cations, [(η5-C5R5)(CO)2Fe]+ (R = H, CH3) with heterofunctional amine ligands. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.06.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Liu L, Sarkisian R, Xu Z, Wang H. Asymmetric Michael Addition of Ketones to Alkylidene Malonates and Allylidene Malonates via Enamine–Metal Lewis Acid Bifunctional Catalysis. J Org Chem 2012; 77:7693-9. [DOI: 10.1021/jo301070s] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lu Liu
- Department of Chemistry and
Biochemistry, Miami University, Oxford,
Ohio 45056, United States
| | - Ryan Sarkisian
- Department of Chemistry and
Biochemistry, Miami University, Oxford,
Ohio 45056, United States
| | - Zhenghu Xu
- Department of Chemistry and
Biochemistry, Miami University, Oxford,
Ohio 45056, United States
- Key Lab of Colloid and Interface
Chemistry of Ministry of Education, School of Chemistry and Chemical
Engineering, Shandong University, No. 27
South Shanda Road, Jinan, Shandong 250100, China
| | - Hong Wang
- Department of Chemistry and
Biochemistry, Miami University, Oxford,
Ohio 45056, United States
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39
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Highly efficient direct a larger-scale aldol reactions catalyzed by a flexible prolinamide based-metal Lewis acid bifunctional catalyst in the presence of water. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2011.12.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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40
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Shang JY, Li F, Bai XF, Jiang JX, Yang KF, Lai GQ, Xu LW. Malononitrile-Assisted Highly Chemoselective Bismuth Triflate Catalyzed Conjugate Reduction of α,β-Unsaturated Ketones. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200020] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Habib F, Cook C, Korobkov I, Murugesu M. Novel in situ manganese-promoted double-aldol addition. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.11.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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42
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43
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Paradowska J, Pasternak M, Gut B, Gryzło B, Mlynarski J. Direct Asymmetric Aldol Reactions Inspired by Two Types of Natural Aldolases: Water-Compatible Organocatalysts and ZnII Complexes. J Org Chem 2011; 77:173-87. [DOI: 10.1021/jo201584w] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Joanna Paradowska
- Institute
of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224
Warsaw, Poland
| | - Monika Pasternak
- Faculty
of Chemistry, Jagiellonian University,
Ingardena 3, 30-060 Krakow,
Poland
| | - Bartosz Gut
- Faculty
of Chemistry, Jagiellonian University,
Ingardena 3, 30-060 Krakow,
Poland
| | - Beata Gryzło
- Faculty
of Chemistry, Jagiellonian University,
Ingardena 3, 30-060 Krakow,
Poland
| | - Jacek Mlynarski
- Institute
of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224
Warsaw, Poland
- Faculty
of Chemistry, Jagiellonian University,
Ingardena 3, 30-060 Krakow,
Poland
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44
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Karmakar A, Maji T, Wittmann S, Reiser O. L-Proline/CoCl2-Catalyzed Highly Diastereo- and Enantioselective Direct Aldol Reactions. Chemistry 2011; 17:11024-9. [DOI: 10.1002/chem.201101299] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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45
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Stolley RM, Maczka MT, Louie J. Nickel-Catalyzed [2+2+2] Cycloaddition of Diynes and Cyanamides. European J Org Chem 2011; 2011:3815-3824. [PMID: 25346615 PMCID: PMC4208422 DOI: 10.1002/ejoc.201100428] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Indexed: 11/10/2022]
Abstract
A variety of bicyclic N,N-disubstituted 2-aminopyridines have been prepared from diynes and cyanamides by nickel-catalyzed [2+2+2] cycloaddition reactions. The reactions proceeded at room temperature with low catalyst loading to afford 2-aminopyridines in good to excellent yields. The method is amenable to both internal and terminal diynes and proceeds in a regioselective manner. A number of cyanamides with diverse functional group tolerance were used. The intermolecular version employing 3-hexyne and N-cyanopyrrolidine also afforded the desired N,N-disubstituted 2-aminopyridine in good yield.
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Affiliation(s)
- Ryan M. Stolley
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, USA, Fax: +1-801-581-8433
| | - Michael T. Maczka
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, USA, Fax: +1-801-581-8433
| | - Janis Louie
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, USA, Fax: +1-801-581-8433
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46
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Trichlorosilyl triflate for enantioselective direct-type aldol reaction with chiral phosphine oxide. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.03.095] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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47
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Xu Z, Liu L, Wheeler K, Wang H. Asymmetric Inverse-Electron-Demand Hetero-Diels-Alder Reaction of Six-membered Cyclic Ketones: An Enamine/Metal Lewis Acid Bifunctional Approach. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100160] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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48
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Xu Z, Liu L, Wheeler K, Wang H. Asymmetric Inverse-Electron-Demand Hetero-Diels-Alder Reaction of Six-membered Cyclic Ketones: An Enamine/Metal Lewis Acid Bifunctional Approach. Angew Chem Int Ed Engl 2011; 50:3484-8. [DOI: 10.1002/anie.201100160] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2011] [Indexed: 11/08/2022]
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