151
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Maiti S, Mal P. Soft–Hard Acid/Base-Controlled, Oxidative, N-Selective Arylation of Sulfonanilides via a Nitrenium Ion. J Org Chem 2018; 83:1340-1347. [DOI: 10.1021/acs.joc.7b02841] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saikat Maiti
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
| | - Prasenjit Mal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
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152
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Chiral ethylene-bridged flavinium salts: the stereoselectivity of flavin-10a-hydroperoxide formation and the effect of substitution on the photochemical properties. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2017.10.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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153
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Conformation of some 2,4,6-trisubstitued pyridinium salts. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.08.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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154
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Banik SM, Levina A, Hyde AM, Jacobsen EN. Lewis acid enhancement by hydrogen-bond donors for asymmetric catalysis. Science 2017; 358:761-764. [PMID: 29123063 PMCID: PMC5728151 DOI: 10.1126/science.aao5894] [Citation(s) in RCA: 127] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 10/12/2017] [Indexed: 01/10/2023]
Abstract
Small-molecule dual hydrogen-bond (H-bond) donors such as ureas, thioureas, squaramides, and guanidinium ions enjoy widespread use as effective catalysts for promoting a variety of enantioselective reactions. However, these catalysts are only weakly acidic and therefore require highly reactive electrophilic substrates to be effective. We introduce here a mode of catalytic activity with chiral H-bond donors that enables enantioselective reactions of relatively unreactive electrophiles. Squaramides are shown to interact with silyl triflates by binding the triflate counterion to form a stable, yet highly Lewis acidic, complex. The silyl triflate-chiral squaramide combination promotes the generation of oxocarbenium intermediates from acetal substrates at low temperatures. Enantioselectivity in nucleophile additions to the cationic intermediates is then controlled through a network of noncovalent interactions between the squaramide catalyst and the oxocarbenium triflate.
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Affiliation(s)
- Steven M Banik
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
| | - Anna Levina
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
| | - Alan M Hyde
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
| | - Eric N Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA.
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155
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Benz S, Mareda J, Besnard C, Sakai N, Matile S. Catalysis with chalcogen bonds: neutral benzodiselenazole scaffolds with high-precision selenium donors of variable strength. Chem Sci 2017; 8:8164-8169. [PMID: 29568463 PMCID: PMC5855965 DOI: 10.1039/c7sc03866f] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 10/06/2017] [Indexed: 12/15/2022] Open
Abstract
Benzodiselenazoles are introduced for efficient anion binding and unprecedented non-covalent catalysis in the focal point of neutral selenium-based chalcogen-bond donors.
The benzodiselenazoles (BDS) introduced in this report fulfill, for the first time, all the prerequisites for non-covalent high-precision chalcogen-bonding catalysis in the focal point of conformationally immobilized σ holes on strong selenium donors in a neutral scaffold. Rational bite-angle adjustment to the long Se–C bonds was the key for BDS design. For the unprecedented BDS motif, synthesis of 12 analogs from o-xylene, crystal structure, σ hole variation strategies, optoelectronic properties, theoretical and experimental anion binding as well as catalytic activity are reported. Chloride binding increases with the depth of the σ holes down to KD = 11 μM in THF. Catalytic activities follow the same trend and culminate in rate enhancements for transfer hydrogenation of quinolines beyond 100 000.
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Affiliation(s)
- Sebastian Benz
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/ ; Tel: +41 22 379 6523
| | - Jiri Mareda
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/ ; Tel: +41 22 379 6523
| | - Céline Besnard
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/ ; Tel: +41 22 379 6523
| | - Naomi Sakai
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/ ; Tel: +41 22 379 6523
| | - Stefan Matile
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/ ; Tel: +41 22 379 6523
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156
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Freindorf M, Cremer D, Kraka E. Gold(I)-assisted catalysis – a comprehensive view on the [3,3]-sigmatropic rearrangement of allyl acetate. Mol Phys 2017. [DOI: 10.1080/00268976.2017.1382735] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Marek Freindorf
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, Dallas, TX, USA
| | - Dieter Cremer
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, Dallas, TX, USA
| | - Elfi Kraka
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, Dallas, TX, USA
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157
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Su H, Wu Q, Wang H, Wang H. An assessment of the random-phase approximation functional and characteristics analysis for noncovalent cation-π interactions. Phys Chem Chem Phys 2017; 19:26014-26021. [PMID: 28920597 DOI: 10.1039/c7cp04504b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The binding energy is of great importance in understanding the formation and stability of noncovalent interactions. However, the determination of the binding energy with high precision and efficiency in medium- and long-range noncovalent interactions is still challenging for quantum chemistry. Here, we assess the performance of random-phase approximation (RPA), a fully non-local fifth-rung of the Jacob ladder functional, in determining the binding energy of cation-π systems (cation = Li+, Na+, Be2+, Mg2+, Al+, and NH4+; π = C6H6), which, to the best of our knowledge, has not been investigated. Using experimental results as the benchmark, we systematically compared the RPA method to the other ab initio methods (DFT/B3LYP, MP2, CCSD(T), and QCISD(T)) both in calculation accuracy and efficiency. From the perspective of accuracy, RPA is the best among these approaches, followed by the CCSD(T) and QCISD(T) methods. DFT/B3LYP and MP2 provide the worst accuracy. In addition, the computational efficiency of RPA is much faster than that of CCSD(T) and QCISD(T). We believe that RPA is a robust method for the precise description of medium- and long-range noncovalent interactions and is capable of providing benchmarking data. The interaction strength and interaction nature of cation-π systems are further analyzed by atoms in molecules (AIM) and the color-mapped reduced density gradient (RDG) isosurface, which are consistent with the characteristics of a typical cation-π interaction.
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Affiliation(s)
- He Su
- School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, P. R. China.
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158
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Osseili H, Mukherjee D, Spaniol TP, Okuda J. Ligand Influence on Carbonyl Hydroboration Catalysis by Alkali Metal Hydridotriphenylborates [(L)M][HBPh3
] (M=Li, Na, K). Chemistry 2017; 23:14292-14298. [DOI: 10.1002/chem.201702818] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Indexed: 01/10/2023]
Affiliation(s)
- Hassan Osseili
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
| | - Debabrata Mukherjee
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
| | - Thomas P. Spaniol
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
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159
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Himiyama T, Taniguchi N, Kato S, Onoda A, Hayashi T. A Pyrene-Linked Cavity within a β-Barrel Protein Promotes an Asymmetric Diels-Alder Reaction. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704524] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Tomoki Himiyama
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Naomasa Taniguchi
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Shunsuke Kato
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Akira Onoda
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Takashi Hayashi
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamadaoka Suita Osaka 565-0871 Japan
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160
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Himiyama T, Taniguchi N, Kato S, Onoda A, Hayashi T. A Pyrene-Linked Cavity within a β-Barrel Protein Promotes an Asymmetric Diels-Alder Reaction. Angew Chem Int Ed Engl 2017; 56:13618-13622. [DOI: 10.1002/anie.201704524] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Tomoki Himiyama
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Naomasa Taniguchi
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Shunsuke Kato
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Akira Onoda
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamadaoka Suita Osaka 565-0871 Japan
| | - Takashi Hayashi
- Department of Applied Chemistry; Graduate School of Engineering; Osaka University; 2-1 Yamadaoka Suita Osaka 565-0871 Japan
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161
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Alegre-Requena JV, Marqués-López E, Herrera RP. “Push–Pull π+/π–” (PPππ) Systems in Catalysis. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02446] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Juan V. Alegre-Requena
- Laboratorio de Organocatálisis
Asimétrica, Departamento de Química Orgánica,
Instituto de Síntesis Química y Catálisis Homogénea
(ISQCH) CSIC-Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Eugenia Marqués-López
- Laboratorio de Organocatálisis
Asimétrica, Departamento de Química Orgánica,
Instituto de Síntesis Química y Catálisis Homogénea
(ISQCH) CSIC-Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Raquel P. Herrera
- Laboratorio de Organocatálisis
Asimétrica, Departamento de Química Orgánica,
Instituto de Síntesis Química y Catálisis Homogénea
(ISQCH) CSIC-Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
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162
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Hare SR, Pemberton RP, Tantillo DJ. Navigating Past a Fork in the Road: Carbocation-π Interactions Can Manipulate Dynamic Behavior of Reactions Facing Post-Transition-State Bifurcations. J Am Chem Soc 2017; 139:7485-7493. [PMID: 28504880 DOI: 10.1021/jacs.7b01042] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Dynamics calculations are described for carbocation rearrangements involving product-forming pathways with post-transition-state bifurcations. We show that noncovalent interactions with associated benzene rings (a simple model of aromatic amino acid side chains) can switch inherent dynamical tendencies for competing modes of disrotation, establishing that meaningful changes in dynamically controlled product selectivity can be achieved with few weak noncovalent interactions.
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Affiliation(s)
- Stephanie R Hare
- Department of Chemistry, University of California, Davis , One Shields Avenue, Davis, California 95616, United States
| | - Ryan P Pemberton
- Department of Chemistry, University of California, Davis , One Shields Avenue, Davis, California 95616, United States
| | - Dean J Tantillo
- Department of Chemistry, University of California, Davis , One Shields Avenue, Davis, California 95616, United States
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163
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Abstract
This report focuses on the remote control of anion-π catalysis by electric fields. We have synthesized and immobilized anion-π catalysts to explore the addition reaction of malonic acid half thioesters to enolate acceptors on conductive indium tin oxide surfaces. Exposed to increasing electric fields, anion-π catalysts show an increase in activity and an inversion of selectivity. These changes originate from a more than 100-fold rate enhancement of the disfavored enolate addition reaction that coincides with an increase in selectivity of transition-state recognition by up to -14.8 kJ mol-1. The addition of nitrate with strong π affinity nullified (IC50 = 2.2 mM) the responsiveness of anion-π catalysts to electric fields. These results support that the polarization of the π-acidic naphthalenediimide surface in anion-π catalysts with electric fields increases the recognition of anionic intermediates and transition states on this polarized π surface, that is, the existence and relevance of electric-field-assisted anion-π catalysis.
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Affiliation(s)
- Masaaki Akamatsu
- Department of Organic Chemistry, University of Geneva , 1211 Geneva, Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry, University of Geneva , 1211 Geneva, Switzerland
| | - Stefan Matile
- Department of Organic Chemistry, University of Geneva , 1211 Geneva, Switzerland
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164
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Liu L, Cotelle Y, Klehr J, Sakai N, Ward TR, Matile S. Anion-π catalysis: bicyclic products with four contiguous stereogenic centers from otherwise elusive diastereospecific domino reactions on π-acidic surfaces. Chem Sci 2017; 8:3770-3774. [PMID: 28580108 PMCID: PMC5436548 DOI: 10.1039/c7sc00525c] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 02/16/2017] [Indexed: 11/28/2022] Open
Abstract
Anion-π interactions have been introduced recently to catalysis. The idea of stabilizing anionic intermediates and transition states on π-acidic surfaces is a new fundamental concept. By now, examples exist for asymmetric enolate, enamine, iminium and transamination chemistry, and the first anion-π enzyme has been created. Delocalized over large aromatic planes, anion-π interactions appear particularly attractive to stabilize extensive long-distance charge displacements during domino processes. Moving on from the formation of cyclohexane rings with five stereogenic centers in one step on a π-acidic surface, we here focus on asymmetric anion-π catalysis of domino reactions that afford bicyclic products with quaternary stereogenic centers. Catalyst screening includes a newly synthesized, better performing anion-π version of classical organocatalysts from cinchona alkaloids, and anion-π enzymes. We find stereoselectivities that are clearly better than the best ones reported with conventional catalysts, culminating in unprecedented diastereospecificity. Moreover, we describe achiral salts as supramolecular chirality enhancers and report the first artificial enzyme that operates in neutral water with anion-π interactions, i.e., interactions that are essentially new to enzymes. Evidence in support of contributions of anion-π interactions to asymmetric catalysis include increasing diastereo- and enantioselectivity with increasing rates, i.e., asymmetric transition-state stabilization in the presence of π-acidic surfaces and inhibition with the anion selectivity sequence NO3- > Br- > BF4- > PF6-.
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Affiliation(s)
- Le Liu
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; www.unige.ch/sciences/chiorg/matile/ ; Tel: +41 22 379 6523
| | - Yoann Cotelle
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; www.unige.ch/sciences/chiorg/matile/ ; Tel: +41 22 379 6523
- National Centre of Competence in Research (NCCR) Molecular Systems Engineering , Switzerland . www.nccr-mse.ch
| | - Juliane Klehr
- National Centre of Competence in Research (NCCR) Molecular Systems Engineering , Switzerland . www.nccr-mse.ch
- Department of Chemistry , University of Basel , Basel , Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; www.unige.ch/sciences/chiorg/matile/ ; Tel: +41 22 379 6523
| | - Thomas R Ward
- National Centre of Competence in Research (NCCR) Molecular Systems Engineering , Switzerland . www.nccr-mse.ch
- Department of Chemistry , University of Basel , Basel , Switzerland
| | - Stefan Matile
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; www.unige.ch/sciences/chiorg/matile/ ; Tel: +41 22 379 6523
- National Centre of Competence in Research (NCCR) Molecular Systems Engineering , Switzerland . www.nccr-mse.ch
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165
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Selg C, Neumann W, Lönnecke P, Hey-Hawkins E, Zeitler K. Carboranes as Aryl Mimetics in Catalysis: A Highly Active Zwitterionic NHC-Precatalyst. Chemistry 2017; 23:7932-7937. [DOI: 10.1002/chem.201700209] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Indexed: 01/12/2023]
Affiliation(s)
- Christoph Selg
- Institut für Organische Chemie; Universität Leipzig; Johannisallee 29 04103 Leipzig Germany
| | - Wilma Neumann
- Institut für Anorganische Chemie; Universität Leipzig; Johannisallee 29 04103 Leipzig Germany
- Current address: Department of Chemistry; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - Peter Lönnecke
- Institut für Anorganische Chemie; Universität Leipzig; Johannisallee 29 04103 Leipzig Germany
| | - Evamarie Hey-Hawkins
- Institut für Anorganische Chemie; Universität Leipzig; Johannisallee 29 04103 Leipzig Germany
| | - Kirsten Zeitler
- Institut für Organische Chemie; Universität Leipzig; Johannisallee 29 04103 Leipzig Germany
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166
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Neel AJ, Hilton MJ, Sigman MS, Toste FD. Exploiting non-covalent π interactions for catalyst design. Nature 2017; 543:637-646. [PMID: 28358089 PMCID: PMC5907483 DOI: 10.1038/nature21701] [Citation(s) in RCA: 514] [Impact Index Per Article: 73.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 01/27/2017] [Indexed: 12/18/2022]
Abstract
Molecular recognition, binding and catalysis are often mediated by non-covalent interactions involving aromatic functional groups. Although the relative complexity of these so-called π interactions has made them challenging to study, theory and modelling have now reached the stage at which we can explain their physical origins and obtain reliable insight into their effects on molecular binding and chemical transformations. This offers opportunities for the rational manipulation of these complex non-covalent interactions and their direct incorporation into the design of small-molecule catalysts and enzymes.
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Affiliation(s)
- Andrew J Neel
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Margaret J Hilton
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, USA
| | - Matthew S Sigman
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, USA
| | - F Dean Toste
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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167
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West TH, Walden DM, Taylor JE, Brueckner AC, Johnston RC, Cheong PHY, Lloyd-Jones GC, Smith AD. Catalytic Enantioselective [2,3]-Rearrangements of Allylic Ammonium Ylides: A Mechanistic and Computational Study. J Am Chem Soc 2017; 139:4366-4375. [PMID: 28230365 PMCID: PMC5374492 DOI: 10.1021/jacs.6b11851] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A mechanistic study of the isothiourea-catalyzed enantioselective [2,3]-rearrangement of allylic ammonium ylides is described. Reaction kinetic analyses using 19F NMR and density functional theory computations have elucidated a reaction profile and allowed identification of the catalyst resting state and turnover-rate limiting step. A catalytically relevant catalyst-substrate adduct has been observed, and its constitution elucidated unambiguously by 13C and 15N isotopic labeling. Isotopic entrainment has shown the observed catalyst-substrate adduct to be a genuine intermediate on the productive cycle toward catalysis. The influence of HOBt as an additive upon the reaction, catalyst resting state, and turnover-rate limiting step has been examined. Crossover experiments have probed the reversibility of each of the proposed steps of the catalytic cycle. Computations were also used to elucidate the origins of stereocontrol, with a 1,5-S···O interaction and the catalyst stereodirecting group providing transition structure rigidification and enantioselectivity, while preference for cation-π interactions over C-H···π is responsible for diastereoselectivity.
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Affiliation(s)
- Thomas H West
- EaStCHEM, School of Chemistry, University of St Andrews , North Haugh, St. Andrews, KY16 9ST, U.K
| | - Daniel M Walden
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97333, United States
| | - James E Taylor
- EaStCHEM, School of Chemistry, University of St Andrews , North Haugh, St. Andrews, KY16 9ST, U.K
| | - Alexander C Brueckner
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97333, United States
| | - Ryne C Johnston
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97333, United States
| | - Paul Ha-Yeon Cheong
- Department of Chemistry, Oregon State University , 153 Gilbert Hall, Corvallis, Oregon 97333, United States
| | - Guy C Lloyd-Jones
- EaStCHEM, School of Chemistry, University of Edinburgh , Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, U.K
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews , North Haugh, St. Andrews, KY16 9ST, U.K
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168
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K+···Cπ and K+···F Non-Covalent Interactions in π-Functionalized Potassium Fluoroalkoxides. INORGANICS 2017. [DOI: 10.3390/inorganics5010013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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169
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Achar TK, Sahoo PK, Mal P. Cation-π Assisted Synthesis of Alkyl Aryl EthersviaC-CN Functionalization of 1,2-Dicyano Pyrazines. ChemistrySelect 2017. [DOI: 10.1002/slct.201700210] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Tapas Kumar Achar
- School of Chemical Sciences; National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar; PO Bhimpur-Padanpur, Via Jatni; District Khurda Odisha 752050 India
| | - Prasit Kumar Sahoo
- School of Chemical Sciences; National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar; PO Bhimpur-Padanpur, Via Jatni; District Khurda Odisha 752050 India
| | - Prasenjit Mal
- School of Chemical Sciences; National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar; PO Bhimpur-Padanpur, Via Jatni; District Khurda Odisha 752050 India
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170
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Min C, Seidel D. Asymmetric Brønsted acid catalysis with chiral carboxylic acids. Chem Soc Rev 2017; 46:5889-5902. [DOI: 10.1039/c6cs00239k] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review provides an overview of various catalytic enantioselective transformations that utilize chiral carboxylic acids as Brønsted acid catalysts.
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Affiliation(s)
- Chang Min
- Department of Chemistry and Chemical Biology
- Rutgers, The State University of New Jersey
- Piscataway
- USA
| | - Daniel Seidel
- Department of Chemistry and Chemical Biology
- Rutgers, The State University of New Jersey
- Piscataway
- USA
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171
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Bose A, Mal P. Using weak interactions to control C–H mono-nitration of indolines. Chem Commun (Camb) 2017; 53:11368-11371. [DOI: 10.1039/c7cc06267b] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
By utilising simultaneous cooperative multiple weak interactions (soft forces), mild and selective C5–H or C7–H mono-nitration of indoline was demonstrated.
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Affiliation(s)
- Anima Bose
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- India
| | - Prasenjit Mal
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- India
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172
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Lu J, Khetrapal NS, Johnson JA, Zeng XC, Zhang J. “π-Hole−π” Interaction Promoted Photocatalytic Hydrodefluorination via Inner-Sphere Electron Transfer. J Am Chem Soc 2016; 138:15805-15808. [DOI: 10.1021/jacs.6b08620] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jingzhi Lu
- Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Navneet S. Khetrapal
- Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Jacob A. Johnson
- Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Xiao Cheng Zeng
- Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Jian Zhang
- Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
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173
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Laserna V, Martin E, Escudero-Adán EC, Kleij AW. Aluminum-Catalyzed Formation of Functional 1,3,2-Dioxathiolane 2-Oxides from Sulfur Dioxide: An Easy Entry towardsN-Substituted Aziridines. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600831] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Victor Laserna
- Institute of Chemical Research of Catalonia (ICIQ); the Barcelona Institute of Science & Technology; Av. Països Catalans 16 43007 Tarragona Spain
| | - Eddy Martin
- Institute of Chemical Research of Catalonia (ICIQ); the Barcelona Institute of Science & Technology; Av. Països Catalans 16 43007 Tarragona Spain
| | - Eduardo C. Escudero-Adán
- Institute of Chemical Research of Catalonia (ICIQ); the Barcelona Institute of Science & Technology; Av. Països Catalans 16 43007 Tarragona Spain
| | - Arjan W. Kleij
- Institute of Chemical Research of Catalonia (ICIQ); the Barcelona Institute of Science & Technology; Av. Països Catalans 16 43007 Tarragona Spain
- Catalan Institute of Research and Advanced Studies (ICREA); Pg. Lluís Companys 23 08010 Barcelona Spain
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174
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Yamada S, Yamamoto N, Takamori E. Synthesis of Molecular Seesaw Balances and the Evaluation of Pyridinium−π Interactions. J Org Chem 2016; 81:11819-11830. [DOI: 10.1021/acs.joc.6b02295] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shinji Yamada
- Department of Chemistry, Faculty of Science, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku,
Tokyo 112-8610, Japan
| | - Natsuo Yamamoto
- Department of Chemistry, Faculty of Science, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku,
Tokyo 112-8610, Japan
| | - Eri Takamori
- Department of Chemistry, Faculty of Science, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku,
Tokyo 112-8610, Japan
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175
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Affiliation(s)
- Le Liu
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
| | - Stefan Matile
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland
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176
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Wang C, Miros FN, Mareda J, Sakai N, Matile S. Asymmetric Anion-π Catalysis on Perylenediimides. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608842] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Chao Wang
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - François N. Miros
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Jiri Mareda
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Stefan Matile
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
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177
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Wang C, Miros FN, Mareda J, Sakai N, Matile S. Asymmetric Anion-π Catalysis on Perylenediimides. Angew Chem Int Ed Engl 2016; 55:14422-14426. [DOI: 10.1002/anie.201608842] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Indexed: 01/21/2023]
Affiliation(s)
- Chao Wang
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - François N. Miros
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Jiri Mareda
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Stefan Matile
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
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