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Schnitzer T, Schnurr M, Zahrt AF, Sakhaee N, Denmark SE, Wennemers H. Machine Learning to Develop Peptide Catalysts-Successes, Limitations, and Opportunities. ACS CENTRAL SCIENCE 2024; 10:367-373. [PMID: 38435528 PMCID: PMC10906243 DOI: 10.1021/acscentsci.3c01284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/02/2024] [Accepted: 01/03/2024] [Indexed: 03/05/2024]
Abstract
Peptides have been established as modular catalysts for various transformations. Still, the vast number of potential amino acid building blocks renders the identification of peptides with desired catalytic activity challenging. Here, we develop a machine-learning workflow for the optimization of peptide catalysts. First-in a hypothetical competition-we challenged our workflow to identify peptide catalysts for the conjugate addition reaction of aldehydes to nitroolefins and compared the performance of the predicted structures with those optimized in our laboratory. On the basis of the positive results, we established a universal training set (UTS) containing 161 catalysts to sample an in silico library of ∼30,000 tripeptide members. Finally, we challenged our machine learning strategy to identify a member of the library as a stereoselective catalyst for an annulation reaction that has not been catalyzed by a peptide thus far. We conclude with a comparison of data-driven versus expert-knowledge-guided peptide catalyst optimization.
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Affiliation(s)
- Tobias Schnitzer
- Laboratory
of Organic Chemistry, ETH Zurich, D-CHAB, Vladimir-Prelog-Weg 3, 8093 Zurich, Switzerland
| | - Martin Schnurr
- Laboratory
of Organic Chemistry, ETH Zurich, D-CHAB, Vladimir-Prelog-Weg 3, 8093 Zurich, Switzerland
| | - Andrew F. Zahrt
- Roger
Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Nader Sakhaee
- Roger
Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Scott E. Denmark
- Roger
Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Helma Wennemers
- Laboratory
of Organic Chemistry, ETH Zurich, D-CHAB, Vladimir-Prelog-Weg 3, 8093 Zurich, Switzerland
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2
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Busche SA, Traxler M, Thomas A, Börner HG. Ligating Catalytically Active Peptides onto Microporous Polymers: A General Route Toward Specifically-Functional High Surface Area Platforms. CHEMSUSCHEM 2024; 17:e202301045. [PMID: 37698038 DOI: 10.1002/cssc.202301045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/08/2023] [Accepted: 09/11/2023] [Indexed: 09/13/2023]
Abstract
A versatile post-synthetic modification strategy to functionalize a high surface area microporous network (MPN-OH) by bio-orthogonal inverse electron-demand Diels-Alder (IEDDA) ligation is presented. While the polymer matrix is modified with a readily accessible norbornene isocyanate (Nor-NCO), a series of functional units presenting the robust asymmetric 1,2,4,5-tetrazine (Tz) allows easy functionalization of the MPN by chemoselective Nor/Tz ligation. A generic route is demonstrated, modulating the internal interfaces by introducing carboxylates, amides or amino acids as well as an oligopeptide d-Pro-Pro-Glu organocatalyst. The MPN-Pz-Peptide construct largely retains the catalytic activity and selectivity in an enantioselective enamine catalysis, demonstrates remarkable availability in different solvents, offers heterogeneous organocatalysis in bulk and shows stability in recycling settings.
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Affiliation(s)
- Steffen A Busche
- Department of Chemistry, Laboratory for Organic Synthesis of Functional Systems, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, Berlin, Germany
| | - Michael Traxler
- Institute of Chemistry, Technische Universität Berlin, Institute of Chemistry, Hardenbergstr. 40, Berlin, Germany
| | - Arne Thomas
- Institute of Chemistry, Technische Universität Berlin, Institute of Chemistry, Hardenbergstr. 40, Berlin, Germany
| | - Hans G Börner
- Department of Chemistry, Laboratory for Organic Synthesis of Functional Systems, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, Berlin, Germany
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3
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Vela-Gallego S, Lewandowski B, Möhler J, Puente A, Gil-Cantero D, Wennemers H, de la Escosura A. Modifying the Catalytic Activity of Lipopeptide Assemblies with Nucleobases. Chemistry 2024; 30:e202303395. [PMID: 37877614 DOI: 10.1002/chem.202303395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 10/18/2023] [Accepted: 10/25/2023] [Indexed: 10/26/2023]
Abstract
Biohybrid catalysts that operate in aqueous media are intriguing for systems chemistry. In this paper, we investigate whether control over the self-assembly of biohybrid catalysts can tune their properties. As a model, we use the catalytic activity of functional hybrid molecules consisting of a catalytic H-dPro-Pro-Glu tripeptide, derivatized with fatty acid and nucleobase moieties. This combination of simple biological components merged the catalytic properties of the peptide with the self-assembly of the lipid, and the structural ordering of the nucleobases. The biomolecule hybrids self-assemble in aqueous media into fibrillar assemblies and catalyze the reaction between butanal and nitrostyrene. The interactions between the nucleobases enhanced the order of the supramolecular structures and affected their catalytic activity and stereoselectivity. The results point to the significant control and ordering that nucleobases can provide in the self-assembly of biologically inspired supramolecular catalysts.
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Affiliation(s)
- Sonia Vela-Gallego
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Campus Cantoblanco, 28049, Madrid, Spain
| | - Bartosz Lewandowski
- Laboratory of Organic Chemistry, D-CHAB, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Jasper Möhler
- Laboratory of Organic Chemistry, D-CHAB, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Alonso Puente
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Campus Cantoblanco, 28049, Madrid, Spain
| | - David Gil-Cantero
- Department of Structure of Macromolecules, Centro Nacional de Biotecnología / CSIC, Campus de Cantoblanco, 28049, Madrid, Spain
| | - Helma Wennemers
- Laboratory of Organic Chemistry, D-CHAB, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Andrés de la Escosura
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Campus Cantoblanco, 28049, Madrid, Spain
- Institute for Advanced Research in Chemistry (IAdChem), Campus de Cantoblanco, 28049, Madrid, Spain
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4
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Schnurr M, Rackl JW, Wennemers H. Overcoming Deactivation of Amine-Based Catalysts: Access to Fluoroalkylated γ-Nitroaldehydes. J Am Chem Soc 2023; 145:23275-23280. [PMID: 37845230 DOI: 10.1021/jacs.3c08198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Organocatalytic conjugate addition reactions of aldehydes to fluoroalkylated nitroolefins with chiral amine catalysts offer a straightforward stereoselective path to fluoroalkylated γ-nitroaldehydes and downstream derivatives. However, amine-based catalysts suffer from deactivation by reaction with electron-poor fluoroalkylated nitroolefin. Here, we show that catalyst deactivation can be overcome by catalysts that bear an intramolecular acid for protonation and release of the alkylated catalyst through ß-elimination of the nitroolefin. NMR spectroscopic, kinetic, and molecular modeling studies provided detailed structural and mechanistic insights into the factors that control reversible catalyst alkylation and facilitate efficient catalysis.
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Affiliation(s)
- Martin Schnurr
- Laboratory of Organic Chemistry, D-CHAB, ETH Zürich, Vladimir-Prelog-Weg 3, Zürich 8093, Switzerland
| | - Jonas W Rackl
- Laboratory of Organic Chemistry, D-CHAB, ETH Zürich, Vladimir-Prelog-Weg 3, Zürich 8093, Switzerland
| | - Helma Wennemers
- Laboratory of Organic Chemistry, D-CHAB, ETH Zürich, Vladimir-Prelog-Weg 3, Zürich 8093, Switzerland
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5
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Murayama S, Li Z, Liang H, Liu Y, Naka H, Maruoka K. Impact of Catalyst Deuteration on the Reactivity of Chiral Phase-Transfer Organocatalysts. Chemistry 2023; 29:e202301866. [PMID: 37332072 DOI: 10.1002/chem.202301866] [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: 06/12/2023] [Revised: 06/16/2023] [Accepted: 06/16/2023] [Indexed: 06/20/2023]
Abstract
Site-specifically deuterated organocatalysts were prepared and found to show improved reactivity over the non-deuterated analogs. Two privileged C2 -symmetric chiral binaphthyl-modified tetraalkylammonium salts were selected for this study. The stability of these phase-transfer catalysts was generally improved by site-specific deuteration, though the degree of improvement was structure dependent. In particular, a large secondary kinetic isotope effect was observed for the tetradeuterated phase-transfer catalyst. The performance of these deuterated catalysts in the asymmetric catalytic alkylation of amino acid derivatives was better than that of non-deuterated analogs at low catalyst loadings. The results suggest that catalyst deuteration is a promising strategy for enhancing the stability and performance of organocatalysts.
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Affiliation(s)
- Sei Murayama
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, 606-8501, Japan
| | - Zhurong Li
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Huatai Liang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Yan Liu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, 510006, P. R. China
| | - Hiroshi Naka
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, 606-8501, Japan
- Deuterium Science Research Unit Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Kyoto, 606-8501, Japan
| | - Keiji Maruoka
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, 606-8501, Japan
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, P. R. China
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangdong University of Technology, Guangzhou, 510006, P. R. China
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Morales-Manrique C, Baquero EA, Guevara-Pulido J. Recent Advances in the Synthesis of 3,4-Dihydropyran-2-Ones Organocatalyzed by N-Heterocyclic Carbenes. Molecules 2023; 28:molecules28093743. [PMID: 37175154 PMCID: PMC10179788 DOI: 10.3390/molecules28093743] [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: 03/23/2023] [Revised: 04/21/2023] [Accepted: 04/23/2023] [Indexed: 05/15/2023] Open
Abstract
In recent years, N-heterocyclic carbenes (NHC) have gained recognition as versatile molecules capable of acting as organocatalysts in various reactions, particularly through the activation of aldehydes via Breslow-type adducts. This organocatalytic activation has enabled the production of numerous 3,4-dihydropyran-2-ones and related derivatives. In this review, we provide an overview of the production of 3,4-dihydropyran-2-ones and derivatives via organocatalytic processes involving NHCs over the past eight years. These processes involve the use of a diverse range of substrates, catalysts, and reaction conditions, which can be classified into [4+2]-and [3+3]-type cycloadditions, primarily aimed at synthesizing this skeleton due to its biological activity and multiple stereocenters. These processes are scaled up to the gram scale, and the resulting products are often directed towards epimerization and functionalization to produce more complex molecules with potential applications in the biological field. Finally, we provide a perspective and the future directions of this topic in organic synthesis.
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Affiliation(s)
- Camilo Morales-Manrique
- Estado Sólido y Catálisis Ambiental (ESCA), Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Carrera 30 No. 45-03, Bogotá 111321, Colombia
- INQA, Química Farmacéutica, Facultad de Ciencias, Universidad El Bosque, Bogotá 11001, Colombia
| | - Edwin A Baquero
- Estado Sólido y Catálisis Ambiental (ESCA), Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Carrera 30 No. 45-03, Bogotá 111321, Colombia
| | - James Guevara-Pulido
- INQA, Química Farmacéutica, Facultad de Ciencias, Universidad El Bosque, Bogotá 11001, Colombia
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7
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Recent Advances in Asymmetric Synthesis of Pyrrolidine-Based Organocatalysts and Their Application: A 15-Year Update. Molecules 2023; 28:molecules28052234. [PMID: 36903480 PMCID: PMC10005811 DOI: 10.3390/molecules28052234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 02/21/2023] [Accepted: 02/24/2023] [Indexed: 03/05/2023] Open
Abstract
In 1971, chemists from Hoffmann-La Roche and Schering AG independently discovered a new asymmetric intramolecular aldol reaction catalyzed by the natural amino acid proline, a transformation now known as the Hajos-Parrish-Eder-Sauer-Wiechert reaction. These remarkable results remained forgotten until List and Barbas reported in 2000 that L-proline was also able to catalyze intermolecular aldol reactions with non-negligible enantioselectivities. In the same year, MacMillan reported on asymmetric Diels-Alder cycloadditions which were efficiently catalyzed by imidazolidinones deriving from natural amino acids. These two seminal reports marked the birth of modern asymmetric organocatalysis. A further important breakthrough in this field happened in 2005, when Jørgensen and Hayashi independently proposed the use of diarylprolinol silyl ethers for the asymmetric functionalization of aldehydes. During the last 20 years, asymmetric organocatalysis has emerged as a very powerful tool for the facile construction of complex molecular architectures. Along the way, a deeper knowledge of organocatalytic reaction mechanisms has been acquired, allowing for the fine-tuning of the structures of privileged catalysts or proposing completely new molecular entities that are able to efficiently catalyze these transformations. This review highlights the most recent advances in the asymmetric synthesis of organocatalysts deriving from or related to proline, starting from 2008.
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8
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Möhler JS, Beiersdörfer LK, Masina B, Wechsler P, Wennemers H. Tripeptide Organocatalysts for Stereoselective Conjugate Addition Reactions with N‐Heterocyclic Substituents. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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Homma C, Kano T. Design and Synthesis of Phenylcyclopropane-based Chiral Amine Catalysts and Their Application in Asymmetric Reactions. J SYN ORG CHEM JPN 2022. [DOI: 10.5059/yukigoseikyokaishi.80.92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Taichi Kano
- Department of Applied Chemistry, Tokyo University of Agriculture and Technology
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10
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Schnitzer T, Rackl JW, Wennemers H. Stereoselective Peptide Catalysis in Complex Environments – From River Water to Cell Lysates. Chem Sci 2022; 13:8963-8967. [PMID: 36091207 PMCID: PMC9365096 DOI: 10.1039/d2sc02044k] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 05/27/2022] [Indexed: 11/21/2022] Open
Abstract
Many stereoselective peptide catalysts have been established. They consist, like nature's catalysts, of amino acids but have significantly lower molecular weights than enzymes. Whereas enzymes operate with exquisite chemoselectivity in complex biological environments, peptide catalysts are used in pure organic solvents and at higher concentrations. Can a peptide catalyst exhibit chemoselectivity reminiscent of enzymes? Here, we investigated the properties of tripeptide catalysts in complex mixtures in hydrophobic and aqueous solvents. We challenged the catalysts with biomolecules bearing functional groups that could interfere by coordination or reaction with the peptide, the substrates, or intermediates. H-dPro-αMePro-Glu-NHC12H15 emerged through tailoring of the trans/cis ratio of the tertiary amide as a conformationally well-defined tripeptide that catalyzes C–C bond formations with high reactivity and stereoselectivity – regardless of the solvent and compound composition. The chemoselectivity of the tripeptide is so high that it even catalyzes reactions in cell lysates. The findings provoke the question of the potential role of peptide catalysis in nature and during the evolution of enzymes. The reactivity, stereo-, and chemoselectivity of a tripeptide are so high that it catalyzes conjugate addition reactions with high stereoselectivity in complex compound mixtures—even in cell lysates.![]()
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Affiliation(s)
- Tobias Schnitzer
- Laboratory of Organic Chemistry, ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Jonas W Rackl
- Laboratory of Organic Chemistry, ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Helma Wennemers
- Laboratory of Organic Chemistry, ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
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11
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Legrand B, Maillard LT. α,β-Unsaturated γ-Peptide Foldamers. Chempluschem 2021; 86:629-645. [PMID: 33856125 DOI: 10.1002/cplu.202100045] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/31/2021] [Indexed: 01/01/2023]
Abstract
Despite their concomitant emergence in the 1990s, γ-peptide foldamers have not developed as fast as β-peptide foldamers and to date, only a few γ-oligomer structures have been reported, and with sparse applications. Among these examples, sequences containing α,β-unsaturated γ-amino acids have recently drawn attention since the Z/E configurations of the double bond provide opposite planar restrictions leading to divergent conformational behaviors, from helix to extended structures. In this Review, we give a comprehensive overview of the developments of γ-peptide foldamers containing α,β-unsaturated γ-amino acids with examples of applications for health and catalysis, as well as materials science.
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Affiliation(s)
- Baptiste Legrand
- Institut des Biomolécules Max Mousseron, IBMM, University of Montpellier, ENSCM, CNRS, Montpellier, France., 15 Av. Charles Flahault BP 14 491, 34093, Montpellier Cedex 5, France
| | - Ludovic T Maillard
- Institut des Biomolécules Max Mousseron, IBMM, University of Montpellier, ENSCM, CNRS, Montpellier, France., 15 Av. Charles Flahault BP 14 491, 34093, Montpellier Cedex 5, France
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12
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Čmelová P, Vargová D, Šebesta R. Hybrid Peptide-Thiourea Catalyst for Asymmetric Michael Additions of Aldehydes to Heterocyclic Nitroalkenes. J Org Chem 2021; 86:581-592. [PMID: 33258590 DOI: 10.1021/acs.joc.0c02251] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Bifunctional organocatalysis combining covalent and noncovalent activation is presented. The hybrid peptide-thiourea catalyst features a N-terminal proline moiety for aldehyde activation and a thiourea unit for electrophile activation. This catalyst effectively promotes asymmetric Michael additions of aldehydes to challenging but biologically relevant heterocycle-containing nitroalkenes. The catalyst can be used under solvent-free conditions. Spectroscopic and density functional theory studies elucidate the catalyst structure and mode of action.
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Affiliation(s)
- Patrícia Čmelová
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | - Denisa Vargová
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | - Radovan Šebesta
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
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13
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Schnitzer T, Ganzoni RL, Wennemers H. Impact of the β-turn hydrogen bond on the trans/cis ratio and the performance of the peptide catalyst H-dPro-Pro-Glu-NH2. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131184] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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14
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Möhler JS, Schnitzer T, Wennemers H. Amine Catalysis with Substrates Bearing N-Heterocyclic Moieties Enabled by Control over the Enamine Pyramidalization Direction. Chemistry 2020; 26:15623-15628. [PMID: 32573875 DOI: 10.1002/chem.202002966] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Indexed: 02/06/2023]
Abstract
Stereoselective organocatalytic C-C bond formations that tolerate N-heterocycles are valuable since these moieties are common motifs in numerous chiral bioactive compounds. Such transformations are, however, challenging since N-heterocyclic moieties can interfere with the catalytic reaction. Here, we present a peptide that catalyzes conjugate addition reactions between aldehydes and nitroolefins bearing a broad range of different N-heterocyclic moieties with basic and/or H-bonding sites in excellent yields and stereoselectivities. Tuning of the pyramidalization direction of the enamine intermediate enabled the high stereoselectivity.
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Affiliation(s)
- Jasper S Möhler
- Laboratory of Organic Chemistry, D-CHAB, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Tobias Schnitzer
- Laboratory of Organic Chemistry, D-CHAB, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Helma Wennemers
- Laboratory of Organic Chemistry, D-CHAB, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
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15
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Metrano AJ, Chinn AJ, Shugrue CR, Stone EA, Kim B, Miller SJ. Asymmetric Catalysis Mediated by Synthetic Peptides, Version 2.0: Expansion of Scope and Mechanisms. Chem Rev 2020; 120:11479-11615. [PMID: 32969640 PMCID: PMC8006536 DOI: 10.1021/acs.chemrev.0c00523] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Low molecular weight synthetic peptides have been demonstrated to be effective catalysts for an increasingly wide array of asymmetric transformations. In many cases, these peptide-based catalysts have enabled novel multifunctional substrate activation modes and unprecedented selectivity manifolds. These features, along with their ease of preparation, modular and tunable structures, and often biomimetic attributes make peptides well-suited as chiral catalysts and of broad interest. Many examples of peptide-catalyzed asymmetric reactions have appeared in the literature since the last survey of this broad field in Chemical Reviews (Chem. Rev. 2007, 107, 5759-5812). The overarching goal of this new Review is to provide a comprehensive account of the numerous advances in the field. As a corollary to this goal, we survey the many different types of catalytic reactions, ranging from acylation to C-C bond formation, in which peptides have been successfully employed. In so doing, we devote significant discussion to the structural and mechanistic aspects of these reactions that are perhaps specific to peptide-based catalysts and their interactions with substrates and/or reagents.
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Affiliation(s)
- Anthony J. Metrano
- AstraZeneca Oncology R&D, 35 Gatehouse Dr., Waltham, MA 02451, United States
| | - Alex J. Chinn
- Department of Chemistry, Princeton University, Princeton, NJ 08544, United States
| | - Christopher R. Shugrue
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Elizabeth A. Stone
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, CT 06520, United States
| | - Byoungmoo Kim
- Department of Chemistry, Clemson University, Clemson, SC 29634, United States
| | - Scott J. Miller
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, CT 06520, United States
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Abstract
Enzymes are predominantly proteins able to effectively and selectively catalyze highly complex biochemical reactions in mild reaction conditions. Nevertheless, they are limited to the arsenal of reactions that have emerged during natural evolution in compliance with their intrinsic nature, three-dimensional structures and dynamics. They optimally work in physiological conditions for a limited range of reactions, and thus exhibit a low tolerance for solvent and temperature conditions. The de novo design of synthetic highly stable enzymes able to catalyze a broad range of chemical reactions in variable conditions is a great challenge, which requires the development of programmable and finely tunable artificial tools. Interestingly, over the last two decades, chemists developed protein secondary structure mimics to achieve some desirable features of proteins, which are able to interfere with the biological processes. Such non-natural oligomers, so called foldamers, can adopt highly stable and predictable architectures and have extensively demonstrated their attractiveness for widespread applications in fields from biomedical to material science. Foldamer science was more recently considered to provide original solutions to the de novo design of artificial enzymes. This review covers recent developments related to peptidomimetic foldamers with catalytic properties and the principles that have guided their design.
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Schnitzer T, Wennemers H. Deactivation of Secondary Amine Catalysts via Aldol Reaction-Amine Catalysis under Solvent-Free Conditions. J Org Chem 2020; 85:7633-7640. [PMID: 32329616 DOI: 10.1021/acs.joc.0c00665] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Despite intense interest in amine-catalyzed stereoselective reactions, high catalyst loadings of ≥10 mol % are still common and either due to low reactivity or catalyst deactivation. Yet, few deactivation pathways are well understood. Here, we unraveled the deactivation of secondary amines by undesired aldol reaction. Mechanistic studies with peptide and prolinol silyl ether catalysts showed the generality of this so-far underappreciated catalyst deactivation pathway. The insights enabled conjugate addition reactions between aldehydes and nitroolefins on a multigram scale in the absence of solvent-conditions that are attractive as environmentally benign processes-with excellent product yields and stereoselectivities in the presence of as little as 0.1 mol % of a chemoselective peptidic catalyst.
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Affiliation(s)
- Tobias Schnitzer
- Laboratory of Organic Chemistry, ETH Zurich, D-CHAB, Vladimir-Prelog-Weg 3, 8093 Zurich, Switzerland
| | - Helma Wennemers
- Laboratory of Organic Chemistry, ETH Zurich, D-CHAB, Vladimir-Prelog-Weg 3, 8093 Zurich, Switzerland
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18
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Takeshima A, Shimogaki M, Kano T, Maruoka K. Development of Ketone-Based Brominating Agents (KBA) for the Practical Asymmetric α-Bromination of Aldehydes Catalyzed by Tritylpyrrolidine. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01596] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aika Takeshima
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Mio Shimogaki
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Taichi Kano
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo, Kyoto 606-8501, Japan
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
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19
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Kozma V, Fülöp F, Szőllősi G. 1,2‐Diamine‐Derived (thio)Phosphoramide Organocatalysts in Asymmetric Michael Additions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000335] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Viktória Kozma
- Department of Organic ChemistryUniversity of Szeged 6720 Szeged Dóm tér 8 Hungary
| | - Ferenc Fülöp
- Institute of Pharmaceutical ChemistryUniversity of Szeged 6720 Szeged Eötvös utca 6 Hungary
- MTA-SZTE Stereochemistry Research GroupUniversity of Szeged 6720 Szeged Eötvös utca 6 Hungary
- University of Szeged, Interdisciplinary Excellence CentreInstitute of Pharmaceutical Chemistry 6720 Szeged Eötvös utca 6 Hungary
| | - György Szőllősi
- MTA-SZTE Stereochemistry Research GroupUniversity of Szeged 6720 Szeged Eötvös utca 6 Hungary
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20
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Organocatalysed conjugate addition reactions of aldehydes to nitroolefins with anti selectivity. Nat Catal 2020. [DOI: 10.1038/s41929-019-0406-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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21
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Schnitzer T, Möhler JS, Wennemers H. Effect of the enamine pyramidalization direction on the reactivity of secondary amine organocatalysts. Chem Sci 2020; 11:1943-1947. [PMID: 34123288 PMCID: PMC8148379 DOI: 10.1039/c9sc05410c] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Chiral secondary amines are valuable catalysts for reactions that proceed through an enamine intermediate. Here, we explored the importance of the pyramidalization direction of the enamine-N on the reactivity of chiral enamines with a combination of computational, NMR spectroscopic, and kinetic experiments. Studies with peptidic catalysts that bear cyclic amines with different ring sizes revealed that endo-pyramidalized enamines are significantly more reactive compared to exo-pyramidalized analogs. The results show that the pyramidalization direction can have a greater effect than n→π* orbital overlap on the reactivity of chiral enamines. The data enabled the development of a catalyst with higher reactivity compared to the parent catalyst. Endo-pyramidalisation at nitrogen bestows enamines derived from α-substituted amines with higher reactivity compared to exo-pyramidalisation.![]()
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Affiliation(s)
- Tobias Schnitzer
- Laboratory of Organic Chemistry, ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Jasper S Möhler
- Laboratory of Organic Chemistry, ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Helma Wennemers
- Laboratory of Organic Chemistry, ETH Zürich Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
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22
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Patel HA, Gutal A, Sahoo SK, Soni HP. Asymmetric Direct Aldol Reaction in Confined Space: Molecular Conformations of Organocatalyst Affect Chiral Induction. ChemistrySelect 2019. [DOI: 10.1002/slct.201903032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Hemanshu A. Patel
- Department of ChemistryFaculty of ScienceThe Maharaja Sayajirao University of Baroda Vadodara- 390 002, Gujarat India
| | - Akash Gutal
- Department of Applied ChemistryS. V. National Institute of Technology (SVNIT) Surat- 395007, Gujarat India
| | - Suban K. Sahoo
- Department of Applied ChemistryS. V. National Institute of Technology (SVNIT) Surat- 395007, Gujarat India
| | - Hemant P. Soni
- Department of ChemistryFaculty of ScienceThe Maharaja Sayajirao University of Baroda Vadodara- 390 002, Gujarat India
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23
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Takeshima A, Kano T, Maruoka K. Synthesis of Phenylcyclopropane-Based Secondary Amine Catalysts and Their Applications in Enamine Catalysis. Org Lett 2019; 21:8071-8074. [PMID: 31513419 DOI: 10.1021/acs.orglett.9b03070] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel chiral motif based on a phenylcyclopropane scaffold has been designed, and a facile synthetic route to the key intermediate for the synthesis of phenylcyclopropane-based chiral secondary amines has been developed. Newly synthesized chiral amines function as effective catalysts for several asymmetric reactions through enamine intermediates.
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Affiliation(s)
- Aika Takeshima
- Department of Chemistry, Graduate School of Science , Kyoto University , Sakyo, Kyoto 606-8502 , Japan
| | - Taichi Kano
- Department of Chemistry, Graduate School of Science , Kyoto University , Sakyo, Kyoto 606-8502 , Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science , Kyoto University , Sakyo, Kyoto 606-8502 , Japan.,Department of Organocatalytic Chemistry, Graduate School of Pharmaceutical Sciences , Kyoto University , Sakyo, Kyoto 606-8501 , Japan.,School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , China
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24
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Maillard LT, Park HS, Kang YK. Organocatalytic Asymmetric Addition of Aldehyde to Nitroolefin by H-d-Pro-Pro-Glu-NH 2: A Mechanistic Study. ACS OMEGA 2019; 4:8862-8873. [PMID: 31459974 PMCID: PMC6648279 DOI: 10.1021/acsomega.9b00465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 05/13/2019] [Indexed: 06/10/2023]
Abstract
The mechanism of the asymmetric addition of aldehyde (butanal) to nitroolefin (β-nitrostyrene) catalyzed by H-d-Pro-Pro-Glu-NH2 (dPPE-NH2; 1) was explored using density functional theory methods in chloroform. By conformational search, it was confirmed that catalyst 1 and its enamine intermediate adopted a dominant conformation with a βI structure stabilized by a C10 H-bond between the C=O of d-Pro1 and C-terminal NH2 proton and by an additional H-bond between the side chain and the backbone of Glu3. This βI turn structure was conserved all along the catalytic cycle. Consistently with the kinetic studies, the C-C bond formation between the enamine and electrophile was also confirmed as the rate-determining step. The stereoselectivity results from a re → re prochiral approach of enamine and β-nitrostyrene with a gauche- orientation of the double bonds. Although it was suggested as the possible formation of dihydrooxazine oxide species, this process was confirmed to be kinetically less accessible than the formation of acyclic nitronate. In particular, our calculated results supported that the carboxylic acid group of Glu3 in 1 played a central role by acting as general acid/base all along the catalytic cycle and orienting the asymmetric C-C bond formation.
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Affiliation(s)
- Ludovic T. Maillard
- Institut
des Biomolécules Max Mousseron, UMR CNRS-UM-ENSCM 5247, UFR des Sciences Pharmaceutiques
et Biologiques, 15 Avenue
Charles Flahault, 34093 Montpellier Cedex 5, France
| | - Hae Sook Park
- Department
of Nursing, Cheju Halla University, Cheju 63092, Republic of Korea
| | - Young Kee Kang
- Department
of Chemistry, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
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25
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Aguesseau-Kondrotas J, Simon M, Legrand B, Bantigniès JL, Kang YK, Dumitrescu D, Van der Lee A, Campagne JM, de Figueiredo RM, Maillard LT. Prospect of Thiazole-based γ-Peptide Foldamers in Enamine Catalysis: Exploration of the Nitro-Michael Addition. Chemistry 2019; 25:7396-7401. [PMID: 30946485 DOI: 10.1002/chem.201901221] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Indexed: 12/18/2022]
Abstract
As three-dimensional folding is prerequisite to biopolymer activity, complex functions may also be achieved through foldamer science. Because of the diversity of sizes, shapes and folding available with synthetic monomers, foldamer frameworks enable a numerous opportunities for designing new generations of catalysts. We herein demonstrate that heterocyclic γ-peptide scaffolds represent a versatile platform for enamine catalysis. One central feature was to determine how the catalytic activity and the transfer of chiral information might be under the control of the conformational behaviours of the oligomer.
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Affiliation(s)
- Julie Aguesseau-Kondrotas
- Institut des Biomolécules Max Mousseron, UMR CNRS-UM-ENSCM 5247, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093, Montpellier Cedex 5, France
| | - Matthieu Simon
- Institut des Biomolécules Max Mousseron, UMR CNRS-UM-ENSCM 5247, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093, Montpellier Cedex 5, France
| | - Baptiste Legrand
- Institut des Biomolécules Max Mousseron, UMR CNRS-UM-ENSCM 5247, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093, Montpellier Cedex 5, France
| | | | - Young Kee Kang
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk, 28644, Korea
| | - Dan Dumitrescu
- XRD2 beamline, Elettra-Sincrotrone Trieste S.C.p.A., 34149, Basovizza, Trieste, Italy
| | - Arie Van der Lee
- Institut Européen des Membranes, UMR CNRS-UM-ENSCM 5635, Montpellier, France
| | - Jean-Marc Campagne
- Institut Charles Gerhardt Montpellier (ICGM), UMR 5253, UMR CNRS-UM-ENSCM, Montpellier, France
| | | | - Ludovic T Maillard
- Institut des Biomolécules Max Mousseron, UMR CNRS-UM-ENSCM 5247, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093, Montpellier Cedex 5, France
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26
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Schnitzer T, Wennemers H. Effect of
β
3
‐Amino Acids on the Performance of the Peptidic Catalyst H‐
d
Pro‐Pro‐Glu‐NH
2. Helv Chim Acta 2019. [DOI: 10.1002/hlca.201900070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tobias Schnitzer
- ETH ZurichLaboratorium für Organische Chemie, D-CHAB Vladimir-Prelog-Weg 3 CH-8093 Zurich Switzerland
| | - Helma Wennemers
- ETH ZurichLaboratorium für Organische Chemie, D-CHAB Vladimir-Prelog-Weg 3 CH-8093 Zurich Switzerland
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27
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Borges‐González J, García‐Monzón I, Martín T. Conformational Control of Tetrahydropyran‐Based Hybrid Dipeptide Catalysts Improves Activity and Stereoselectivity. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900247] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Jorge Borges‐González
- Instituto de Productos Naturales y AgrobiologíaCSIC Francisco Sánchez, 3 38206 La Laguna, Tenerife Spain
- Doctoral and Postgraduate SchoolUniversity of La Laguna
| | - Irma García‐Monzón
- Instituto de Productos Naturales y AgrobiologíaCSIC Francisco Sánchez, 3 38206 La Laguna, Tenerife Spain
- Doctoral and Postgraduate SchoolUniversity of La Laguna
| | - Tomás Martín
- Instituto de Productos Naturales y AgrobiologíaCSIC Francisco Sánchez, 3 38206 La Laguna, Tenerife Spain
- Instituto Universitario de Bio-Orgánica “Antonio González” CIBICANUniversidad de La Laguna, Francisco Sánchez, 2 38206 La Laguna, Tenerife Spain
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28
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Crawford JM, Sigman MS. Conformational Dynamics in Asymmetric Catalysis: Is Catalyst Flexibility a Design Element? SYNTHESIS-STUTTGART 2019; 51:1021-1036. [PMID: 31235980 PMCID: PMC6590688 DOI: 10.1055/s-0037-1611636] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Traditionally, highly selective low molecular weight catalysts have been designed to contain rigidifying structural elements. As a result, many proposed stereochemical models rely on steric repulsion for explaining the observed selectivity. Recently, as is the case for enzymatic systems, it has become apparent that some flexibility can be beneficial for imparting selectivity. Dynamic catalysts can reorganize to maximize attractive non-covalent interactions that stabilize the favored diastereomeric transition state, while minimizing repulsive non-covalent interactions for enhanced selectivity. This Short Review discusses catalyst conformational dynamics and how these effects have proven beneficial for a variety of catalyst classes, including tropos ligands, cinchona alkaloids, hydrogen-bond donating catalysts, and peptides.
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Affiliation(s)
- Jennifer M. Crawford
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
| | - Matthew S. Sigman
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, United States
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29
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Biewenga L, Saravanan T, Kunzendorf A, van der Meer JY, Pijning T, Tepper PG, van Merkerk R, Charnock SJ, Thunnissen AMWH, Poelarends GJ. Enantioselective Synthesis of Pharmaceutically Active γ-Aminobutyric Acids Using a Tailor-Made Artificial Michaelase in One-Pot Cascade Reactions. ACS Catal 2019; 9:1503-1513. [PMID: 30740262 PMCID: PMC6366683 DOI: 10.1021/acscatal.8b04299] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 01/03/2019] [Indexed: 11/30/2022]
Abstract
![]()
Chiral
γ-aminobutyric acid (GABA) analogues represent abundantly
prescribed drugs, which are broadly applied as anticonvulsants, as
antidepressants, and for the treatment of neuropathic pain. Here we
report a one-pot two-step biocatalytic cascade route for synthesis
of the pharmaceutically relevant enantiomers of γ-nitrobutyric
acids, starting from simple precursors (acetaldehyde and nitroalkenes),
using a tailor-made highly enantioselective artificial “Michaelase”
(4-oxalocrotonate tautomerase mutant L8Y/M45Y/F50A), an aldehyde dehydrogenase
with a broad non-natural substrate scope, and a cofactor recycling
system. We also report a three-step chemoenzymatic cascade route for
the efficient chemical reduction of enzymatically prepared γ-nitrobutyric
acids into GABA analogues in one pot, achieving high enantiopurity
(e.r. up to 99:1) and high overall yields (up to 70%). This chemoenzymatic
methodology offers a step-economic alternative route to important
pharmaceutically active GABA analogues, and highlights the exciting
opportunities available for combining chemocatalysts, natural enzymes,
and designed artificial biocatalysts in multistep syntheses.
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Affiliation(s)
- Lieuwe Biewenga
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Thangavelu Saravanan
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Andreas Kunzendorf
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Jan-Ytzen van der Meer
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Tjaard Pijning
- Structural Biology Group, Groningen Institute of Biomolecular Sciences and Biotechnology, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Pieter G. Tepper
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Ronald van Merkerk
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Simon J. Charnock
- Prozomix Ltd., Station Court, Haltwhistle, Northumberland NE49 9HN, United Kingdom
| | - Andy-Mark W. H. Thunnissen
- Molecular Enzymology Group, Groningen Institute of Biomolecular Sciences and Biotechnology, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Gerrit J. Poelarends
- Department of Chemical and Pharmaceutical Biology, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
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30
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Myers EL, Palte MJ, Raines RT. Catalysis of Hydrogen-Deuterium Exchange Reactions by 4-Substituted Proline Derivatives. J Org Chem 2019; 84:1247-1256. [PMID: 30602119 DOI: 10.1021/acs.joc.8b02644] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The identification and understanding of structure-activity relationships is vital for rational catalyst design. A kinetic study of the hydrogen-deuterium exchange reaction of cyclohexanone in aqueous solution, as catalyzed by proline derivatives, has revealed valuable structure-activity relationships. In phosphate-buffered solution, cis-4-fluoroproline is more active than the trans isomer, a distinction that appears to originate from a destabilizing interaction between the fluorine atom and phosphate anion during general acid-catalyzed dehydration of the carbinolamine intermediate. trans-4-Ammoniumprolines are exceptionally active catalysts owing to favorable Coulombic interactions involving the ammonium group and the alkoxide moiety formed upon 1,2-addition of the proline derivative to the ketone. These results could be used for the optimization of proline catalysts, especially in transformations where the formation of the putative iminium ion is rate-limiting.
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Affiliation(s)
- Eddie L Myers
- School of Chemistry , NUI Galway , University Road , Galway , Ireland
| | | | - Ronald T Raines
- Department of Chemistry , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
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31
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Shen M, Zhu SJ, Liu X, Fu X, Huo WC, Liu XL, Chen YX, Shan QY, Yao HC, Zhang YX. Phase and morphology controlled polymorphic MnO2 nanostructures for electrochemical energy storage. CrystEngComm 2019. [DOI: 10.1039/c9ce00865a] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, a series of MnO2 nanostructures with different crystallographic structures, including δ-MnO2 nanotubes and α-MnO2 nanorods, were prepared using polycarbonate membrane as a template.
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Affiliation(s)
- Man Shen
- College of Material Science and Engineering
- Chongqing University
- Chongqing
- P.R. China
| | - Shi Jin Zhu
- College of Material Science and Engineering
- Chongqing University
- Chongqing
- P.R. China
- Institut für Chemie
| | - Xiaoying Liu
- Engineering Research Center for Waste Oil Recovery Technology and Equipment
- Ministry of Education
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
| | - Xin Fu
- College of Material Science and Engineering
- Chongqing University
- Chongqing
- P.R. China
| | - Wang Chen Huo
- College of Material Science and Engineering
- Chongqing University
- Chongqing
- P.R. China
| | - Xiao Li Liu
- College of Material Science and Engineering
- Chongqing University
- Chongqing
- P.R. China
| | - Yu Xiang Chen
- College of Material Science and Engineering
- Chongqing University
- Chongqing
- P.R. China
| | - Qian Yuan Shan
- College of Material Science and Engineering
- Chongqing University
- Chongqing
- P.R. China
| | - Hong-Chang Yao
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- P.R. China
| | - Yu Xin Zhang
- College of Material Science and Engineering
- Chongqing University
- Chongqing
- P.R. China
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32
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Kaur A, Singh KN, Sharma E, Shilpy, Rani P, Sharma SK. Pyrrolidine-carbamate based new and efficient chiral organocatalyst for asymmetric Michael addition of ketones to nitroolefins. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.09.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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33
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Kawada M, Nakashima K, Hirashima SI, Sakagami T, Koseki Y, Miura T. Stereoselective conjugate addition of ketones to alkylidene malonates using thiourea-sulfonamide organocatalyst. Chirality 2018; 30:1215-1224. [PMID: 30211959 DOI: 10.1002/chir.23015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/02/2018] [Accepted: 07/25/2018] [Indexed: 11/11/2022]
Abstract
In this study, stereoselective conjugate addition of ketones to alkylidene malonates using organocatalyst has been developed. The reaction in the presence of 20 mol% of a novel thiourea-sulfonamide organocatalyst afforded conjugate adducts in moderate to high yields (up to 81%) under mild reaction conditions. Excellent diastereoselectivity (up to 98:2 dr) and enantioselectivity (up to 88% ee) were achieved.
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Affiliation(s)
- Masahiro Kawada
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
| | - Kosuke Nakashima
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
| | - Shin-Ichi Hirashima
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
| | - Toru Sakagami
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
| | - Yuji Koseki
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
| | - Tsuyoshi Miura
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
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34
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Zhang L, Sharma A, Zhu Y, Zhang Y, Wang B, Dong M, Nguyen HT, Wang Z, Wen B, Cao Y, Liu B, Sun X, Yang J, Li Z, Kar A, Shi Y, Macdonald D, Yu Z, Wang X, Lu Y. Efficient and Layer-Dependent Exciton Pumping across Atomically Thin Organic-Inorganic Type-I Heterostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1803986. [PMID: 30159929 DOI: 10.1002/adma.201803986] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 07/19/2018] [Indexed: 05/22/2023]
Abstract
The fundamental light-matter interactions in monolayer transition metal dichalcogenides might be significantly engineered by hybridization with their organic counterparts, enabling intriguing optoelectronic applications. Here, atomically thin organic-inorganic (O-I) heterostructures, comprising monolayer MoSe2 and mono-/few-layer single-crystal pentacene samples, are fabricated. These heterostructures show type-I band alignments, allowing efficient and layer-dependent exciton pumping across the O-I interfaces. The interfacial exciton pumping has much higher efficiency (>86 times) than the photoexcitation process in MoSe2 , although the pentacene layer has much lower optical absorption than MoSe2 . This highly enhanced pumping efficiency is attributed to the high quantum yield in pentacene and the ultrafast energy transfer between the O-I interface. Furthermore, those organic counterparts significantly modulate the bindings of charged excitons in monolayer MoSe2 via their precise dielectric environment engineering. The results open new avenues for exploring fundamental phenomena and novel optoelectronic applications using atomically thin O-I heterostructures.
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Affiliation(s)
- Linglong Zhang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, P. R. China
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Ankur Sharma
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Yi Zhu
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Yuhan Zhang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Bowen Wang
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Miheng Dong
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Hieu T Nguyen
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Zhu Wang
- Department of Electrical and Computer Engineering, University of Wisconsin, Madison, WI, 53706, USA
| | - Bo Wen
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Yujie Cao
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Boqing Liu
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Xueqian Sun
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Jiong Yang
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Ziyuan Li
- Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, 2601, ACT, Australia
| | - Arara Kar
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Yi Shi
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Daniel Macdonald
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - Zongfu Yu
- Department of Electrical and Computer Engineering, University of Wisconsin, Madison, WI, 53706, USA
| | - Xinran Wang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Yuerui Lu
- Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, Australian Capital Territory, 2601, Australia
- ARC Centre of Excellence in Future Low-Energy, Electronics Technologies (FLEET), ANU node, Canberra, Australian Capital Territory, 2601, Australia
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35
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Rigling C, Kisunzu JK, Duschmalé J, Häussinger D, Wiesner M, Ebert MO, Wennemers H. Conformational Properties of a Peptidic Catalyst: Insights from NMR Spectroscopic Studies. J Am Chem Soc 2018; 140:10829-10838. [PMID: 30106584 DOI: 10.1021/jacs.8b05459] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Peptides have become valuable as catalysts for a variety of different reactions, but little is known about the conformational properties of peptidic catalysts. We investigated the conformation of the peptide H-dPro-Pro-Glu-NH2, a highly reactive and stereoselective catalyst for conjugate addition reactions, and the corresponding enamine intermediate in solution by NMR spectroscopy and computational methods. The combination of nuclear Overhauser effects (NOEs), residual dipolar couplings (RDCs), J-couplings, and temperature coefficients revealed that the tripeptide adopts a single predominant conformation in its ground state. The structure is a type I β-turn, which gains stabilization from three hydrogen bonds that are cooperatively formed between all functional groups (secondary amine, carboxylic acid, amides) within the tripeptide. In contrast, the conformation of the enamine intermediate is significantly more flexible. The conformational ensemble of the enamine is still dominated by the β-turn, but the backbone and the side chain of the glutamic acid residue are more dynamic. The key to the switch between rigidity and flexibility of the peptidic catalyst is the CO2H group in the side chain of the glutamic acid residue, which acts as a lid that can open and close. As a result, the peptidic catalyst is able to adapt to the structural requirements of the intermediates and transition states of the catalytic cycle. These insights might explain the robustness and high reactivity of the peptidic catalyst, which exceeds that of other secondary amine-based organocatalysts. The data suggest that a balance between rigidity and flexibility, which is reminiscent of the dynamic nature of enzymes, is beneficial for peptidic catalysts and other synthetic catalysts.
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Affiliation(s)
- Carla Rigling
- Laboratorium für Organische Chemie , ETH Zürich , D-CHAB, Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland
| | - Jessica K Kisunzu
- Laboratorium für Organische Chemie , ETH Zürich , D-CHAB, Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland
| | - Jörg Duschmalé
- Laboratorium für Organische Chemie , ETH Zürich , D-CHAB, Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland.,Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
| | - Daniel Häussinger
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
| | - Markus Wiesner
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
| | - Marc-Olivier Ebert
- Laboratorium für Organische Chemie , ETH Zürich , D-CHAB, Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland
| | - Helma Wennemers
- Laboratorium für Organische Chemie , ETH Zürich , D-CHAB, Vladimir-Prelog-Weg 3 , 8093 Zürich , Switzerland
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36
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Boekhoven J, Didier D. Vereinigung von Kunst und Wissenschaft: Die 53. Bürgenstock-Konferenz. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Job Boekhoven
- Fakultät für Chemie und Institute for Advanced Study; Technische Universität München; Lichtenbergstraße 4 85748 Garching Deutschland
| | - Dorian Didier
- Fakultät für Chemie und Pharmazie; Ludwig-Maximilians-Universität; Butenandtstraße 5-13 81377 München Deutschland
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37
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Boekhoven J, Didier D. Merging Art and Science-The 53rd Bürgenstock Conference. Angew Chem Int Ed Engl 2018; 57:10011-10014. [PMID: 30003659 DOI: 10.1002/anie.201806142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
For the 53rd time, the Bürgenstock Conference gathered some of the most gifted scientists and rising stars in organic, physical, and bioorganic chemistry. Orchestrated by Ilan Marek (President) and his successor, Véronique Gouverneur, the synergy between art and science took place in Brunnen, Switzerland, with a beatiful view over Lake Lucerne.
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Affiliation(s)
- Job Boekhoven
- Department of Chemistry and Institute for Advanced Study, Technische Universität München, Lichtenbergstraße 4, 85748, Garching, Germany
| | - Dorian Didier
- Department of Chemistry and Pharmacy, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377, Munich, Germany
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38
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Szőllősi G, Gombkötő D, Mogyorós AZ, Fülöp F. Surface-Improved Asymmetric Michael Addition Catalyzed by Amino Acids Adsorbed on Laponite. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701627] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- György Szőllősi
- MTA-SZTE Stereochemistry Research Group; University of Szeged; 6720 Szeged, Dóm tér 8 Hungary
| | - Dániel Gombkötő
- Department of Organic Chemistry; University of Szeged; 6720 Szeged, Dóm tér 8 Hungary
| | - Attila Zsolt Mogyorós
- Department of Organic Chemistry; University of Szeged; 6720 Szeged, Dóm tér 8 Hungary
| | - Ferenc Fülöp
- MTA-SZTE Stereochemistry Research Group; University of Szeged; 6720 Szeged, Dóm tér 8 Hungary
- Institute of Pharmaceutical Chemistry; University of Szeged; 6720 Szeged, Eötvös utca 6 Hungary
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39
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Nakashima E, Yamamoto H. Process Catalyst Mass Efficiency by Using Proline Tetrazole Column-Flow System. Chemistry 2018; 24:1076-1079. [PMID: 29315878 DOI: 10.1002/chem.201705982] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Indexed: 11/05/2022]
Abstract
Generally, organocatalysts are not decomposed during chemical transformation, which is different from traditional metal catalysts. To improve catalytic processes efficiency, various studies have been applied to flow synthesis for organocatalysis. Furthermore, many immobilized organocatalysts have been used for heterogeneous flow synthesis, which requires huge amounts of immobilized catalyst and requires several steps to prepare. We took advantage of organocatalysts with low-polarity organic solvent and developed a flow system through a packed-bed column with simply proline tetrazole (5-(2-pyrrolidinyl)-1H-tetrazole) for heterogeneous organocatalytic synthesis. Under ambient temperature, this heterogeneous organocatalyst continuous flow-column system with ketones as a donor provides aldol, Mannich, and o-nitroso aldol reactions in up to quantitative yields with excellent enantio- and chemoselectivity values. Our heterogeneous-flow synthesis provides extremely low process catalyst mass efficiency and continuous production without changing the packed-bed catalyst column.
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Affiliation(s)
- Erika Nakashima
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto, Kasugai, Aichi, 487-8501, Japan
| | - Hisashi Yamamoto
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto, Kasugai, Aichi, 487-8501, Japan
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40
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Földes T, Madarász Á, Révész Á, Dobi Z, Varga S, Hamza A, Nagy PR, Pihko PM, Pápai I. Stereocontrol in Diphenylprolinol Silyl Ether Catalyzed Michael Additions: Steric Shielding or Curtin–Hammett Scenario? J Am Chem Soc 2017; 139:17052-17063. [DOI: 10.1021/jacs.7b07097] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Tamás Földes
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Ádám Madarász
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Ágnes Révész
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Zoltán Dobi
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Szilárd Varga
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Andrea Hamza
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Péter R. Nagy
- MTA-BME
Lendület Quantum Chemistry Research Group, Department of Physical
Chemistry and Materials Science, Budapest University of Technology and Economics, P.O. Box 91, H-1521 Budapest, Hungary
| | - Petri M. Pihko
- Department
of Chemistry and NanoScience Center, University of Jyväskylä, FI-40014 Jyväskylä, Finland
| | - Imre Pápai
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
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41
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Schnitzer T, Wennemers H. Influence of the Trans/Cis Conformer Ratio on the Stereoselectivity of Peptidic Catalysts. J Am Chem Soc 2017; 139:15356-15362. [DOI: 10.1021/jacs.7b06194] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Tobias Schnitzer
- Eidgenossische Technische Hochschule Zurich, Laboratory of Organic Chemistry, Vladimir-Prelog-Weg 3, Zurich 8093, Switzerland
| | - Helma Wennemers
- Eidgenossische Technische Hochschule Zurich, Laboratory of Organic Chemistry, Vladimir-Prelog-Weg 3, Zurich 8093, Switzerland
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42
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Cortes-Clerget M, Jover J, Dussart J, Kolodziej E, Monteil M, Migianu-Griffoni E, Gager O, Deschamp J, Lecouvey M. Bifunctional Tripeptide with a Phosphonic Acid as a Brønsted Acid for Michael Addition: Mechanistic Insights. Chemistry 2017; 23:6654-6662. [DOI: 10.1002/chem.201700604] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Indexed: 01/20/2023]
Affiliation(s)
- Margery Cortes-Clerget
- Sorbonne Paris Cité-Laboratoire CSPBAT-CNRS UMR 7244; Université Paris 13; 1 Rue de Chablis 93000 Bobigny France
| | - Jesús Jover
- Institute of Chemical Research of Catalonia (ICIQ); The Barcelona Institute of Science and Technology; Avgda. Països Catalans, 16 43007 Tarragona Spain
- Departament de Química Inorgànica i Orgànica; Secció de Química Inorgànica; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
| | - Jade Dussart
- Sorbonne Paris Cité-Laboratoire CSPBAT-CNRS UMR 7244; Université Paris 13; 1 Rue de Chablis 93000 Bobigny France
| | - Emilie Kolodziej
- Université Paris Sud, ICMMO, UMR 8182; 15 Rue Georges Clemenceau 91405 Orsay Cedex France
| | - Maelle Monteil
- Sorbonne Paris Cité-Laboratoire CSPBAT-CNRS UMR 7244; Université Paris 13; 1 Rue de Chablis 93000 Bobigny France
| | - Evelyne Migianu-Griffoni
- Sorbonne Paris Cité-Laboratoire CSPBAT-CNRS UMR 7244; Université Paris 13; 1 Rue de Chablis 93000 Bobigny France
| | - Olivier Gager
- Sorbonne Paris Cité-Laboratoire CSPBAT-CNRS UMR 7244; Université Paris 13; 1 Rue de Chablis 93000 Bobigny France
| | - Julia Deschamp
- Sorbonne Paris Cité-Laboratoire CSPBAT-CNRS UMR 7244; Université Paris 13; 1 Rue de Chablis 93000 Bobigny France
| | - Marc Lecouvey
- Sorbonne Paris Cité-Laboratoire CSPBAT-CNRS UMR 7244; Université Paris 13; 1 Rue de Chablis 93000 Bobigny France
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43
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Borges-González J, Feher-Voelger A, Crisóstomo FP, Morales EQ, Martín T. Tetrahydropyran-Based Hybrid Dipeptides as Asymmetric Catalysts for Michael Addition of Aldehydes to β-Nitrostyrenes. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601193] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Jorge Borges-González
- Instituto de Productos Naturales y Agrobiología-CSIC; Avda. Astrofísico Francisco Sánchez, 3 38206 La Laguna, S/C de Tenerife Spain
| | - Andrés Feher-Voelger
- Instituto de Productos Naturales y Agrobiología-CSIC; Avda. Astrofísico Francisco Sánchez, 3 38206 La Laguna, S/C de Tenerife Spain
| | - Fernando Pinacho Crisóstomo
- Instituto de Productos Naturales y Agrobiología-CSIC; Avda. Astrofísico Francisco Sánchez, 3 38206 La Laguna, S/C de Tenerife Spain
- Instituto Universitario de Bio-Orgánica “Antonio González”, CIBICAN; Avda. Astrofísico Francisco Sánchez, 2 38206 La Laguna, S/C de Tenerife Spain
| | - Ezequiel Q. Morales
- Instituto de Productos Naturales y Agrobiología-CSIC; Avda. Astrofísico Francisco Sánchez, 3 38206 La Laguna, S/C de Tenerife Spain
| | - Tomás Martín
- Instituto de Productos Naturales y Agrobiología-CSIC; Avda. Astrofísico Francisco Sánchez, 3 38206 La Laguna, S/C de Tenerife Spain
- Instituto Universitario de Bio-Orgánica “Antonio González”, CIBICAN; Avda. Astrofísico Francisco Sánchez, 2 38206 La Laguna, S/C de Tenerife Spain
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44
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Nakashima E, Yamamoto H. Asymmetric Aldol Synthesis: Choice of Organocatalyst and Conditions. Chem Asian J 2016; 12:41-44. [DOI: 10.1002/asia.201601525] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Erika Nakashima
- Molecular Catalyst Research Center; Chubu University; 1200 Matsumoto, Kasugai Aichi 487-8501 Japan
| | - Hisashi Yamamoto
- Molecular Catalyst Research Center; Chubu University; 1200 Matsumoto, Kasugai Aichi 487-8501 Japan
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45
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Akagawa K, Satou J, Kudo K. Exploration of Structural Frameworks for Reactive and Enantioselective Peptide Catalysts by Library Screenings. J Org Chem 2016; 81:9396-9401. [DOI: 10.1021/acs.joc.6b01591] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Kengo Akagawa
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Junichi Satou
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Kazuaki Kudo
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
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46
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Paz BM, Klier L, Naesborg L, Lauridsen VH, Jensen F, Jørgensen KA. Enantioselective Organocatalytic Cascade Approach to Different Classes of Benzofused Acetals. Chemistry 2016; 22:16810-16818. [DOI: 10.1002/chem.201602992] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Bruno Matos Paz
- Department of Chemistry; Aarhus University; DK-8000 Aarhus C Denmark
| | - Lydia Klier
- Department of Chemistry; Aarhus University; DK-8000 Aarhus C Denmark
| | - Line Naesborg
- Department of Chemistry; Aarhus University; DK-8000 Aarhus C Denmark
| | | | - Frank Jensen
- Department of Chemistry; Aarhus University; DK-8000 Aarhus C Denmark
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47
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Zhu B, Qiu S, Li J, Coote ML, Lee R, Jiang Z. Asymmetric [4 + 2] annulation of 5 H-thiazol-4-ones with a chiral dipeptide-based Brønsted base catalyst. Chem Sci 2016; 7:6060-6067. [PMID: 30034746 PMCID: PMC6022207 DOI: 10.1039/c6sc02039a] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 06/08/2016] [Indexed: 12/26/2022] Open
Abstract
Versatile synthetic strategies that access diverse chemical substrates in a highly chemo- and stereo-selective manner are crucial but demanding. Construction of chiral molecules with multiple (hetero)-quaternary carbon stereocenters in a single fashion is a particularly significant challenge, with important applications in the synthesis of a range of bioactive compounds containing the 1,4-sulfur bridged piperidinone structural motif. The asymmetric synthesis of these entities is complicated due to the need to build at least two hetero-quaternary stereocenters concurrently. In order to achieve this, we have developed a new family of dipeptide-based multifunctional Brønsted base organocatalysts that are highly capable of the first asymmetric [4 + 2] annulation reaction of 5H-thiazol-4-ones with electron-deficient alkenes. This protocol could be applied to a series of alkenes such as nitroalkenes, 4-oxo-4-arylbutenones, 4-oxo-4-arylbutenoates and methyleneindolinones, providing an efficient approach to valuable chiral 1,4-sulfur bridged piperidinones and their derivatives with multiple hetereo-quaternary stereogenic centers in high yields and enantioselectivities. Density functional theory studies involving 5H-thiazol-4-one and nitroolefin catalysis propose stereochemical insights into the origin of enantio- and chemo-selectivity.
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Affiliation(s)
- Bo Zhu
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province , Henan University , Kaifeng , Henan , People's Republic of China .
| | - Shuai Qiu
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province , Henan University , Kaifeng , Henan , People's Republic of China .
| | - Jiangtao Li
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province , Henan University , Kaifeng , Henan , People's Republic of China .
| | - Michelle L Coote
- ARC Centre of Excellence for Electromaterials Science , Research School of Chemistry , Australian National University , Canberra ACT 2601 , Australia .
| | - Richmond Lee
- ARC Centre of Excellence for Electromaterials Science , Research School of Chemistry , Australian National University , Canberra ACT 2601 , Australia .
| | - Zhiyong Jiang
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province , Henan University , Kaifeng , Henan , People's Republic of China .
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48
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Akagawa K, Iwasaki Y, Kudo K. Library Screening in Aqueous Media To Develop a Highly Active Peptide Catalyst for Enantioselective Michael Addition of a Malonate. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600828] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kengo Akagawa
- Institute of Industrial Science; University of Tokyo; 4-6-1 Komaba, Meguro-ku 153-8505 Tokyo Japan
| | - Yumika Iwasaki
- Institute of Industrial Science; University of Tokyo; 4-6-1 Komaba, Meguro-ku 153-8505 Tokyo Japan
| | - Kazuaki Kudo
- Institute of Industrial Science; University of Tokyo; 4-6-1 Komaba, Meguro-ku 153-8505 Tokyo Japan
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49
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Isenegger PG, Pfaltz A. Mass Spectrometric Back Reaction Screening of Quasi-Enantiomeric Products as a Mechanistic Tool. CHEM REC 2016; 16:2534-2543. [PMID: 27417883 DOI: 10.1002/tcr.201600072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Indexed: 11/12/2022]
Abstract
In this account, we discuss a mass spectrometric method that enables unambiguous identification of intermediates involved in the enantioselective step of a catalytic cycle. This method, which we originally developed for rapid evaluation of chiral catalysts, is based on monitoring the back reaction of mass-labeled quasi-enantiomeric products by ESI-MS. In this way, the intrinsic enantioselectivity of a chiral catalyst can be determined directly by quantification of catalytically relevant intermediates. By comparing the results from the forward and back reaction, direct evidence for the involvement of a catalytic intermediate in the enantioselective step can be obtained. In addition, insights about the energy profile of the catalytic cycle may be gained. The potential of back reaction screening as a mechanistic tool is demonstrated for organocatalytic aldol reactions, 1,4-additions of aldehydes to nitroolefins, Diels-Alder reactions, Michael additions, and Morita-Baylis-Hillman reactions.
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Affiliation(s)
- Patrick G Isenegger
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Andreas Pfaltz
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
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50
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Roudier M, Constantieux T, Quintard A, Rodriguez J. Triple Iron/Copper/Iminium Activation for the Efficient Redox Neutral Catalytic Enantioselective Functionalization of Allylic Alcohols. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01102] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Mylène Roudier
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille 13397, France
| | | | - Adrien Quintard
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille 13397, France
| | - Jean Rodriguez
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille 13397, France
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