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Zhang Z, Slak D, Krebs T, Leuschner M, Schmickler N, Kuchuk E, Schmidt J, Domenianni LI, Kleine Büning JB, Grimme S, Vöhringer P, Gansäuer A. A Chiral Titanocene Complex as Regiodivergent Photoredox Catalyst: Synthetic Scope and Mechanism of Catalyst Generation. J Am Chem Soc 2023. [PMID: 38016173 DOI: 10.1021/jacs.3c08029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
We describe a combined synthetic, spectroscopic, and computational study of a chiral titanocene complex as a regiodivergent photoredox catalyst (PRC). With Kagan's complex catCl2 either monoprotected 1,3-diols or 1,4-diols can be obtained in high selectivity from a common epoxide substrate in a regiodivergent epoxide opening depending on which enantiomer of the catalyst is employed. Due to the catalyst-controlled regioselectivity of ring opening and the broader substrate scope, the PRC with catCl2 is also a highly attractive branching point for diversity-oriented synthesis. The photochemical processes of cat(NCS)2, a suitable model for catCl2, were probed by time-correlated single-photon counting. The photoexcited complex displays a thermally activated delayed fluorescence as a result of a singlet-triplet equilibration, S1 ⇄ T1, via intersystem crossing and recrossing. Its triplet state is quenched by electron transfer to the T1 state. Computational and cyclic voltammetry studies highlight the importance of our sulfonamide additive. By bonding to sulfonamide additives, chloride abstraction from [catCl2]- is facilitated, and catalyst deactivation by coordination of the sulfonamide group is circumvented.
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Affiliation(s)
- Zhenhua Zhang
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Daniel Slak
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Tim Krebs
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Marcel Leuschner
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Niklas Schmickler
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Ekaterina Kuchuk
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Jonas Schmidt
- Clausius Institute for Physical and Theoretical Chemistry, Universität Bonn, Wegelerstraße 12, 53115 Bonn, Germany
| | - Luis Ignacio Domenianni
- Clausius Institute for Physical and Theoretical Chemistry, Universität Bonn, Wegelerstraße 12, 53115 Bonn, Germany
| | - Julius B Kleine Büning
- Mulliken Center for Theoretical Chemistry, Clausius Institute for Physical and Theoretical Chemistry, Universität Bonn, Beringstraße 4, 53115 Bonn, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Clausius Institute for Physical and Theoretical Chemistry, Universität Bonn, Beringstraße 4, 53115 Bonn, Germany
| | - Peter Vöhringer
- Clausius Institute for Physical and Theoretical Chemistry, Universität Bonn, Wegelerstraße 12, 53115 Bonn, Germany
| | - Andreas Gansäuer
- Kekulé Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
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2
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Coufal R, Vohlídal J. Pyrazinyl and pyridinyl bis-azomethines formation: an experimental and computational study. Sci Rep 2023; 13:17383. [PMID: 37833405 PMCID: PMC10575867 DOI: 10.1038/s41598-023-44585-7] [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: 04/14/2023] [Accepted: 10/10/2023] [Indexed: 10/15/2023] Open
Abstract
Formation of bis-azomethines from hydrazine and heterocyclic aromatic carbaldehydes, namely pyridine-2-carbaldehyde and pyrazine-2-carbaldehyde, is studied using density functional theory. The theoretical investigation is correlated with experimental results obtained by means of NMR spectroscopy. The presence of bis-hemiaminal intermediates is evidenced by NMR spectra while surprisingly stable hemiaminal intermediate was isolated experimentally. Water, methanol and acetic acid were outlined to play a crucial role as active catalysts of elementary steps of the reaction mechanisms. The possible reaction sequences, i.e. addition-dehydration-addition-dehydration or addition-addition-dehydration-dehydration are investigated and discussed. Also, alternative mechanistic path via ionic mechanism was proposed for the formation of hemiaminals.
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Affiliation(s)
- Radek Coufal
- Department of Science and Research, Faculty of Health Studies, Technical University of Liberec, Studentská 1402/2, 461 17, Liberec 1, Czech Republic.
| | - Jiří Vohlídal
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8/2030, 128 40, Prague 2, Czech Republic
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3
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Coufal R, Tošner Z, Drahoňovský D, Vohlídal J. Hemiacetal-based dynamic systems: a new mechanistic insight. Org Biomol Chem 2023; 21:6956-6968. [PMID: 37581612 DOI: 10.1039/d3ob00668a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
The formation of hemiacetals from pyrazine trifluoromethylketone as a model receptor and four simple alcohols was studied by using quantum chemical calculations and NMR spectroscopy. Free energy profiles for four types of mechanistic pathways were calculated and discussed with respect to kinetic and thermodynamic measurements. We show that hemiacetal formation is facilitated by an assisted proton transfer process via a pseudo eight-membered transition state which brings the theory and experiment into close agreement. Also, a newly proposed mechanistic pathway for hemiacetal formation via a five-membered transition state leading to zwitterionic intermediates is discussed. Direct proton transfer in a pseudo four-membered transition state can be ruled out due to the high energy of transition states with respect to other mechanistic pathways. We also show that in the case of hemiacetals, water and alcohol molecules cannot account sufficiently for the H-transfer process via six-membered transition states.
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Affiliation(s)
- Radek Coufal
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8/2030, 128 40 Prague 2, Czech Republic.
- Department of Science and Research, Faculty of Health Studies, Technical University of Liberec, Studentská 1402/2, 461 17 Liberec 1, Czech Republic
| | - Zdeněk Tošner
- NMR Laboratory, Faculty of Science, Charles University, Hlavova 8/2030, 128 40 Prague 2, Czech Republic
| | - Dušan Drahoňovský
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8/2030, 128 40 Prague 2, Czech Republic
| | - Jiří Vohlídal
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 8/2030, 128 40 Prague 2, Czech Republic.
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4
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Kachi-Terajima C, Okubo M, Ikeda M, Habata Y. Luminescence switch based on the acid/base induced reversibility of covalent bonds in lanthanide(III) complexes. Chem Commun (Camb) 2021; 57:10939-10942. [PMID: 34596172 DOI: 10.1039/d1cc04567a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report an exceptional example of Tb(III) luminescence switching using a reversible covalent bond. The antenna and quencher moieties attached to a ligand of a Tb(III) complex undergo acid/base-driven exchange based on the reversible formation of a hemiaminal ether structure to achieve on-off regulation of luminescence.
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Affiliation(s)
- Chihiro Kachi-Terajima
- Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan. .,Research Center for Materials with Integrated Properties, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan
| | - Miku Okubo
- Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
| | - Mari Ikeda
- Education Centre, Faculty of Engineering, Chiba Institute of Technology, 2-1-1 Shibazono, Narashino, Chiba 275-0023, Japan
| | - Yoichi Habata
- Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan. .,Research Center for Materials with Integrated Properties, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan
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5
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Bravin C, Badetti E, Licini G, Zonta C. Tris(2-pyridylmethyl)amines as emerging scaffold in supramolecular chemistry. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213558] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Bravin C, Guidetti A, Licini G, Zonta C. Supramolecular cages as differential sensors for dicarboxylate anions: guest length sensing using principal component analysis of ESI-MS and 1H-NMR raw data. Chem Sci 2019; 10:3523-3528. [PMID: 30996943 PMCID: PMC6432344 DOI: 10.1039/c8sc05527k] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 02/05/2019] [Indexed: 01/05/2023] Open
Abstract
Dynamic covalent libraries (DCLs) have been widely used in the development of differential sensors. Inspired by recent studies which use supramolecular recognition systems for sensing, we report the use of a tris(-pyridylmethyl)amine (TPMA)-based supramolecular cage as a differential sensor for dicarboxylate anions. In particular, a library of molecular cages constituted by linkers differing in size and flexibility was allowed to equilibrate toward a series of guests differing in molecular size. The differential system was able to discriminate a series of dicarboxylates depending on their chain length. This differentiation was evaluated through the application of the Principal Component Analysis (PCA) method using interpolated and raw data obtained from ESI-MS. Interestingly, while the 1H NMR spectra of the differential system did not allow for the discrimination of the analytes by the naked eye, PCA of the raw data from the spectra revealed information on the chain length of the guest and also on the odd-even character of the carbon chain.
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Affiliation(s)
- Carlo Bravin
- Department of Chemical Sciences , University of Padova , Via Marzolo 1 , 35131 Padova , Italy .
| | - Andrea Guidetti
- Department of Chemical Sciences , University of Padova , Via Marzolo 1 , 35131 Padova , Italy .
| | - Giulia Licini
- Department of Chemical Sciences , University of Padova , Via Marzolo 1 , 35131 Padova , Italy .
| | - Cristiano Zonta
- Department of Chemical Sciences , University of Padova , Via Marzolo 1 , 35131 Padova , Italy .
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7
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Chen J, Klein Gebbink RJM. Deuterated N2Py2 Ligands: Building More Robust Non-Heme Iron Oxidation Catalysts. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04463] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jianming Chen
- Organic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Robertus J. M. Klein Gebbink
- Organic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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8
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Yuan MS, Du X, Liu Z, Li T, Wang W, Anslyn EV, Wang J. Di-(2-picolyl)-N-
(2-quinolinylmethyl)amine-Functionalized Triarylboron: Lewis Acidity Enhancement and Fluorogenic Discrimination Between Fluoride and Cyanide in Aqueous Solution. Chemistry 2018; 24:9211-9216. [DOI: 10.1002/chem.201800884] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Mao-Sen Yuan
- College of Chemistry & Pharmacy; Northwest A&F University; Yangling Shaanxi 712100 China
- Department of Chemistry; The University of Texas at Austin; Austin TX 78712 USA
| | - Xianchao Du
- College of Chemistry & Pharmacy; Northwest A&F University; Yangling Shaanxi 712100 China
| | - Zhiqiang Liu
- State Key Laboratory of Crystal Materials; Shandong University Jinan; Shandong 250100 China
| | - Tianbao Li
- College of Chemistry & Pharmacy; Northwest A&F University; Yangling Shaanxi 712100 China
| | - Wenji Wang
- College of Chemistry & Pharmacy; Northwest A&F University; Yangling Shaanxi 712100 China
| | - Eric V. Anslyn
- Department of Chemistry; The University of Texas at Austin; Austin TX 78712 USA
| | - Jinyi Wang
- College of Chemistry & Pharmacy; Northwest A&F University; Yangling Shaanxi 712100 China
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9
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Raje S, Mondivagu N, Chahal M, Butcher RJ, Angamuthu R. Mechanism of Evolution of Koneramine Complexes from One-Pot Reactions: Snapshots of Intermediates Offer Facile Routes to New Dipicolylamines. Chem Asian J 2018; 13:1458-1466. [PMID: 29603661 DOI: 10.1002/asia.201800185] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 03/15/2018] [Indexed: 11/08/2022]
Abstract
Koneramines (LR OR', R=Ph or Ts; R'=Me, iPr) and their complexes were found to emerge from the system of pyridine-2-carboxaldehyde and N-phenyl/tosylethylenediamine when a primary or secondary alcohol was used as solvent. Imidazolidinylpyridines (LR , R=Ph or Ts) became major emergents whereas hemi-aminals (LR OH, R=Ph or Ts) are minor emergents of the system when tertiary butanol was used as the solvent; the bulky tertiary butyl group prevented the addition of alcohol to the iminium ion that diverted the equilibrium towards imidazolidinylpyridines. By playing with the components of the reaction mixture, crystals of the metastable intermediates bound to copper(II) and/or zinc(II) were obtained and the structures were determined by X-ray diffraction analysis. The reported results shed light on how to control the emergents of the multicomponent reaction mixture that forms koneramines. Reactivity studies of the intermediates pave the way for a new type of koneramine complexes that are new dipicolylamines where the two pyridine moieties of the resulting koneramine are not the same.
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Affiliation(s)
- Sakthi Raje
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Nandakishor Mondivagu
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Manoj Chahal
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Ray J Butcher
- Department of Chemistry, Howard University, Washington, D.C., 20059, United States
| | - Raja Angamuthu
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
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10
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Patel DC, Wahab MF, O'Haver TC, Armstrong DW. Separations at the Speed of Sensors. Anal Chem 2018; 90:3349-3356. [PMID: 29437379 DOI: 10.1021/acs.analchem.7b04944] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The virtue of chemical sensors is speed and analyte specificity. The response time to generate an analytical signal typically varies from ∼1 to 20 s, and they are generally limited to a single analyte. Chemical sensors are significantly affected by multiple interferents, matrix effects, temperature, and can vary widely in sensitivity depending on the sensor format. Separation-based analyses remove matrix effects and interferents and are compatible with multiple analytes. However, the speed of such analyses has not been commensurate with traditional sensors until now. Beds of very small size with optimal geometry, containing core-shell particles of judicious immobilized selectors, can be used in an ultrahigh-flow regime, thereby providing subsecond separations of up to 10 analytes. Short polyether ether ketone lined stainless steel columns of various geometries were evaluated to determine the optimal bed geometry for subsecond analysis. Coupling these approaches provides subsecond-based detection and quantitation of multiple chiral and achiral species, including nucleotides, plant hormones, acids, amino acid derivatives, and sedatives among a variety of other compounds. The subsecond separations were reproducible with 0.9% RSD on retention times and showed consistent performance with 0.9% RSD on reduced plate height in van Deemter curves. A new powerful signal processing algorithm is proposed that can further enhance separation outputs and optical spectra without altering band areas on more complex separations such as 10 peaks under a second.
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Affiliation(s)
- Darshan C Patel
- Department of Chemistry and Biochemistry , University of Texas at Arlington , Arlington , Texas 76019 , United States
| | - M Farooq Wahab
- Department of Chemistry and Biochemistry , University of Texas at Arlington , Arlington , Texas 76019 , United States
| | - Thomas C O'Haver
- Department of Chemistry and Biochemistry , University of Maryland at College Park , College Park , Maryland 20742 , United States
| | - Daniel W Armstrong
- Department of Chemistry and Biochemistry , University of Texas at Arlington , Arlington , Texas 76019 , United States
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11
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Kaabel S, Aav R. Templating Effects in the Dynamic Chemistry of Cucurbiturils and Hemicucurbiturils. Isr J Chem 2017. [DOI: 10.1002/ijch.201700106] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Sandra Kaabel
- Department of Chemistry and Biotechnology, School of Science; Tallinn University of Technology; Akadeemia tee 15 12618 Tallinn Estonia
| | - Riina Aav
- Department of Chemistry and Biotechnology, School of Science; Tallinn University of Technology; Akadeemia tee 15 12618 Tallinn Estonia
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12
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Staderini S, Tuci G, Luconi L, Müller P, Kaskel S, Eychmüller A, Eichler F, Giambastiani G, Rossin A. Zinc Coordination Polymers Containing Isomeric Forms ofp-(Thiazolyl)benzoic Acid: Blue-Emitting Materials with a Solvatochromic Response to Water. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700830] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Samuele Staderini
- Istituto di Chimica dei Composti Organometallici (ICCOM); Consiglio Nazionale delle Ricerche (CNR); Via Madonna del Piano 10 50019 Sesto Fiorentino, Firenze Italy
| | - Giulia Tuci
- Istituto di Chimica dei Composti Organometallici (ICCOM); Consiglio Nazionale delle Ricerche (CNR); Via Madonna del Piano 10 50019 Sesto Fiorentino, Firenze Italy
| | - Lapo Luconi
- Istituto di Chimica dei Composti Organometallici (ICCOM); Consiglio Nazionale delle Ricerche (CNR); Via Madonna del Piano 10 50019 Sesto Fiorentino, Firenze Italy
| | - Philipp Müller
- Institute of Inorganic Chemistry; Technische Universität Dresden; Bergstraße 66 01062 Dresden Germany
| | - Stefan Kaskel
- Institute of Inorganic Chemistry; Technische Universität Dresden; Bergstraße 66 01062 Dresden Germany
| | - Alexander Eychmüller
- Institute of Physical Chemistry; Technische Universität Dresden; Bergstraße 66 01062 Dresden Germany
| | - Franziska Eichler
- Institute of Physical Chemistry; Technische Universität Dresden; Bergstraße 66 01062 Dresden Germany
| | - Giuliano Giambastiani
- Istituto di Chimica dei Composti Organometallici (ICCOM); Consiglio Nazionale delle Ricerche (CNR); Via Madonna del Piano 10 50019 Sesto Fiorentino, Firenze Italy
- Kazan Federal University; Kremlyovskaya Str. 18 420008 Kazan Russia
| | - Andrea Rossin
- Istituto di Chimica dei Composti Organometallici (ICCOM); Consiglio Nazionale delle Ricerche (CNR); Via Madonna del Piano 10 50019 Sesto Fiorentino, Firenze Italy
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13
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Carmo dos Santos NA, Badetti E, Licini G, Abbate S, Longhi G, Zonta C. A stereodynamic fluorescent probe for amino acids. Circular dichroism and circularly polarized luminescence analysis. Chirality 2017; 30:65-73. [DOI: 10.1002/chir.22780] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 09/28/2017] [Accepted: 10/02/2017] [Indexed: 01/09/2023]
Affiliation(s)
| | - Elena Badetti
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Padova PD Italy
| | - Giulia Licini
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Padova PD Italy
| | - Sergio Abbate
- Department of Molecular and Translational Medicine; Università di Brescia; Brescia BS Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine; Università di Brescia; Brescia BS Italy
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Padova PD Italy
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14
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Chang S, Sun YB, Zhang XR, Dong LL, Zhu HY, Lai HW, Wang D. Pd-catalyzed Desulfitative reaction of Aryltrifluoroborates with sodium Arenesulfinates in water. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3970] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sheng Chang
- College of Pharmacy; JiLin Medical University; JiLin 132013 JiLin China
| | - Yong Bing Sun
- National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine; Nanchang 330006 China
| | - Xiu Rong Zhang
- College of Pharmacy; JiLin Medical University; JiLin 132013 JiLin China
| | - Lin Lin Dong
- College of Pharmacy; Yan Bian University; Yan Ji 133002 JiLin PR China
| | - He Yun Zhu
- College of Pharmacy; JiLin Medical University; JiLin 132013 JiLin China
| | - Hong Wei Lai
- College of Pharmacy; JiLin Medical University; JiLin 132013 JiLin China
| | - Dan Wang
- College of Pharmacy; JiLin Medical University; JiLin 132013 JiLin China
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15
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Jaegle M, Wong EL, Tauber C, Nawrotzky E, Arkona C, Rademann J. Proteintemplat-gesteuerte Fragmentligationen - von der molekularen Erkennung zur Wirkstofffindung. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 129:7464-7485. [PMID: 32313319 PMCID: PMC7159557 DOI: 10.1002/ange.201610372] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Revised: 01/10/2017] [Indexed: 12/28/2022]
Abstract
AbstractProteintemplat‐gesteuerte Fragmentligationen sind ein neuartiges Konzept zur Unterstützung der Wirkstofffindung und können dazu beitragen, die Wirksamkeit von Proteinliganden zu verbessern. Es handelt sich dabei um chemische Reaktionen zwischen niedermolekularen Verbindungen (“Fragmenten”), die die Oberfläche eines Proteins als Reaktionsgefäß verwenden, um die Bildung eines Proteinliganden mit erhöhter Bindungsaffinität zu katalysieren. Die Methode nutzt die molekulare Erkennung kleiner reaktiver Fragmente durch die Proteine sowohl zur Assemblierung der Liganden als auch zur Identifizierung bioaktiver Fragmentkombinationen. Chemische Synthese und Bioassay werden dabei in einem Schritt vereint. Dieser Aufsatz diskutiert die biophysikalischen Grundlagen der reversiblen und irreversiblen Fragmentligationen und gibt einen Überblick über die Methoden, mit denen die durch das Proteintemplat gebildeten Ligationsprodukte detektiert werden können. Der chemische Reaktionsraum und aktuelle Anwendungen wie auch die Bedeutung dieses Konzeptes für die Wirkstofffindung werden erörtert.
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Affiliation(s)
- Mike Jaegle
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Straße 2+4Berlin14195Deutschland
| | - Ee Lin Wong
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Straße 2+4Berlin14195Deutschland
| | - Carolin Tauber
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Straße 2+4Berlin14195Deutschland
| | - Eric Nawrotzky
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Straße 2+4Berlin14195Deutschland
| | - Christoph Arkona
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Straße 2+4Berlin14195Deutschland
| | - Jörg Rademann
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Straße 2+4Berlin14195Deutschland
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16
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Jaegle M, Wong EL, Tauber C, Nawrotzky E, Arkona C, Rademann J. Protein-Templated Fragment Ligations-From Molecular Recognition to Drug Discovery. Angew Chem Int Ed Engl 2017; 56:7358-7378. [PMID: 28117936 PMCID: PMC7159684 DOI: 10.1002/anie.201610372] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Revised: 01/10/2017] [Indexed: 12/14/2022]
Abstract
Protein-templated fragment ligation is a novel concept to support drug discovery and can help to improve the efficacy of protein ligands. Protein-templated fragment ligations are chemical reactions between small molecules ("fragments") utilizing a protein's surface as a reaction vessel to catalyze the formation of a protein ligand with increased binding affinity. The approach exploits the molecular recognition of reactive small-molecule fragments by proteins both for ligand assembly and for the identification of bioactive fragment combinations. In this way, chemical synthesis and bioassay are integrated in one single step. This Review discusses the biophysical basis of reversible and irreversible fragment ligations and gives an overview of the available methods to detect protein-templated ligation products. The chemical scope and recent applications as well as future potential of the concept in drug discovery are reviewed.
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Affiliation(s)
- Mike Jaegle
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Strasse 2+4Berlin14195Germany
| | - Ee Lin Wong
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Strasse 2+4Berlin14195Germany
| | - Carolin Tauber
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Strasse 2+4Berlin14195Germany
| | - Eric Nawrotzky
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Strasse 2+4Berlin14195Germany
| | - Christoph Arkona
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Strasse 2+4Berlin14195Germany
| | - Jörg Rademann
- Freie Universität BerlinMedicinal ChemistryKönigin-Luise-Strasse 2+4Berlin14195Germany
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17
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Albano S, Olivo G, Mandolini L, Massera C, Ugozzoli F, Di Stefano S. Formation of Imidazo[1,5-a]pyridine Derivatives Due to the Action of Fe 2+ on Dynamic Libraries of Imines. J Org Chem 2017; 82:3820-3825. [PMID: 28322557 DOI: 10.1021/acs.joc.7b00381] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An imidazo[1,5-a]pyridine derivative was unexpectedly obtained through the action of Fe2+ on a dynamic library of imines generated in situ via condensation of benzaldehyde and 2-picolylamine. The reaction product was easily isolated as the only nitrogen-containing product eluted from the chromatographic column. A reaction mechanism is proposed, in which combined kinetic and thermodynamic effects exerted by Fe2+ on the various steps of the complex reaction sequence are discussed. The Fe2+ nature of the added metal cation was found to be pivotal for the achievement of the imidazo[1,5-a]pyridine derivative as well as its amount in the reaction mixture. When the electronic effects were evaluated, gratifying yields were obtained only in the presence of moderately electron-releasing or moderately electron-withdrawing groups on the aldehyde reactant. No traces of imidazo[1,5-a]pyridine derivatives were obtained for p-OCH3 and p-NO2 benzaldehyde.
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Affiliation(s)
- Simone Albano
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza" , Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Giorgio Olivo
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza" , Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Luigi Mandolini
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza" , Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Chiara Massera
- Dipartimento di Chimica, Università di Parma , Viale delle Scienze 17/a, 43124 Parma, Italy
| | - Franco Ugozzoli
- Dipartimento di Chimica, Università di Parma , Viale delle Scienze 17/a, 43124 Parma, Italy
| | - Stefano Di Stefano
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza" , Piazzale Aldo Moro 5, 00185 Rome, Italy
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18
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Scaramuzzo FA, Badetti E, Licini G, Zonta C. Second-Generation Tris(2-pyridylmethyl)amine-Zinc Complexes as Probes for Enantiomeric Excess Determination of Amino Acids. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601381] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Francesca A. Scaramuzzo
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Via Marzolo 1 35131 Padova Italy
| | - Elena Badetti
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Via Marzolo 1 35131 Padova Italy
| | - Giulia Licini
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Via Marzolo 1 35131 Padova Italy
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Via Marzolo 1 35131 Padova Italy
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19
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Zhang W. Copper-Free Palladium-Catalysed Desulfinative Homocoupling of Sodium Arylsulfinates under Mild and Aerobic Conditions. JOURNAL OF CHEMICAL RESEARCH 2017. [DOI: 10.3184/174751916x14798135087600] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A Pd(II)-catalysed homocoupling of sodium arylsulfinates has been successfully achieved under mild conditions. This transformation is a new method for the homocoupling reaction of sodium arylsulfinates, thus providing an alternative synthesis of symmetric biaryls. The reported homocoupling reaction is tolerant to many common functional groups, such as ester, halo, cyano and nitro and works well in the presence of electron-donating and electron-withdrawing substituents. Notably, the reported desulfinative homocoupling does not require Cu salts, ligands and bases, making this newly developed transformation attractive.
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Affiliation(s)
- Wei Zhang
- Department of Chemistry and Chemical Engineering, Xinxiang University, Xinxiang 453003, P.R. China
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20
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Tessarolo J, Venzo A, Bottaro G, Armelao L, Rancan M. Hampered Subcomponent Self‐Assembly Leads to an Aminal Ligand: Reactivity with Silver(I) and Copper(II). Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201601121] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jacopo Tessarolo
- Dipartimento di Scienze Chimiche Università di Padova Via Marzolo 1 35131 Padova Italy
| | - Alfonso Venzo
- ICMATE‐CNR and INSTM Via Marzolo 1 35131 Padova Italy
| | | | - Lidia Armelao
- Dipartimento di Scienze Chimiche Università di Padova Via Marzolo 1 35131 Padova Italy
- ICMATE‐CNR and INSTM Via Marzolo 1 35131 Padova Italy
| | - Marzio Rancan
- ICMATE‐CNR and INSTM Via Marzolo 1 35131 Padova Italy
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21
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Lim J, Lynch VM, Edupuganti R, Ellington A, Anslyn EV. Synthesis and structural analyses of phenylethynyl-substituted tris(2-pyridylmethyl)amines and their copper(ii) complexes. Dalton Trans 2016; 45:10585-98. [PMID: 27264275 DOI: 10.1039/c6dt00473c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Three new tris(2-pyridylmethyl)amine-based ligands possessing phenylethynyl units have been prepared using Sonogashira couplings and substitution reactions. Copper(ii) complexes of those tetradentate ligands have also been synthesized. Solid-state structures of the six new compounds have been determined by single-crystal X-ray diffraction analyses. Examination of the molecular structures of the ligands revealed the expected triangular geometries with virtually undeformed carbon-carbon triple bonds. While the tertiary nitrogen of the free ligands seem to be prevented from participation in supramolecular non-covalent interactions by the pyridyl hydrogen at the 3-position, the pyridyl nitrogens play a crucial role in the packing mode of the crystal structure. The nitrogens form weak hydrogen bonds, varied in length between 2.32 and 2.66 Å, with the pyridyl hydrogen of its neighbouring molecule. The [NH-C] contacts enforce one-dimensional columnar assemblies on ligands that organize into wall-like structures, which in turn assemble into three-dimensional structures through CH-π interactions. Structural analyses of Cu(ii) complexes of the ligands revealed propeller-like structures caused by steric crowding of three pyridine ligands. The copper complexes of the ligands having three phenylethynyl substituents showed a remarkably deformed carbon-carbon triple bond enforced by a steric effect of the three phenyl groups. Most significantly, a total of seventy non-covalent interactions, classified into twelve types of hydrogen-involving short contacts, were identified in this study. The phenylethynyl substituent participated in forty-two interactions as a hydrogen bond acceptor, and its role was more distinctive in the crystal structures of the Cu(ii) complexes.
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Affiliation(s)
- Jaebum Lim
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78752, USA. and Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, Texas 78752, USA.
| | - Vincent M Lynch
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78752, USA.
| | | | - Andrew Ellington
- Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, Texas 78752, USA.
| | - Eric V Anslyn
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78752, USA.
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22
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Desulfonative pd-catalyzed coupling of aryl trifluoroborates with arylsulfonyl chlorides. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3504] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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23
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Ahn SH, Choi SI, Jung MJ, Nayab S, Lee H. Novel Cobalt(II) complexes containing N,N-di(2-picolyl)amine based ligands; Synthesis, characterization and application towards methyl methacrylate polymerisation. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.02.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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24
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Staderini S, Tuci G, D'Angelantonio M, Manoli F, Manet I, Giambastiani G, Peruzzini M, Rossin A. Zinc Coordination Polymers Containing the m-(2-thiazolyl)benzoic Acid Spacer: Synthesis, Characterization and Luminescent Properties in Aqueous Solutions. ChemistrySelect 2016. [DOI: 10.1002/slct.201600331] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Samuele Staderini
- Consiglio Nazionale delle Ricerche − Istituto di Chimica dei Composti Organometallici (ICCOM-CNR); Via Madonna del Piano 10 - 50019 Sesto Fiorentino (Firenze) Italy
| | - Giulia Tuci
- Consiglio Nazionale delle Ricerche − Istituto di Chimica dei Composti Organometallici (ICCOM-CNR); Via Madonna del Piano 10 - 50019 Sesto Fiorentino (Firenze) Italy
| | - Mila D'Angelantonio
- Consiglio Nazionale delle Ricerche - Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR); Via Gobetti 101 − 40129 Bologna Italy
| | - Francesco Manoli
- Consiglio Nazionale delle Ricerche - Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR); Via Gobetti 101 − 40129 Bologna Italy
| | - Ilse Manet
- Consiglio Nazionale delle Ricerche - Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR); Via Gobetti 101 − 40129 Bologna Italy
| | - Giuliano Giambastiani
- Consiglio Nazionale delle Ricerche − Istituto di Chimica dei Composti Organometallici (ICCOM-CNR); Via Madonna del Piano 10 - 50019 Sesto Fiorentino (Firenze) Italy
- Kazan Federal University; 420008 Kazan Russian Federation
| | - Maurizio Peruzzini
- Consiglio Nazionale delle Ricerche − Istituto di Chimica dei Composti Organometallici (ICCOM-CNR); Via Madonna del Piano 10 - 50019 Sesto Fiorentino (Firenze) Italy
| | - Andrea Rossin
- Consiglio Nazionale delle Ricerche − Istituto di Chimica dei Composti Organometallici (ICCOM-CNR); Via Madonna del Piano 10 - 50019 Sesto Fiorentino (Firenze) Italy
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25
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Orrillo AG, Escalante AM, Furlan RLE. Dithioacetal Exchange: A New Reversible Reaction for Dynamic Combinatorial Chemistry. Chemistry 2016; 22:6746-9. [PMID: 26990904 DOI: 10.1002/chem.201600208] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Indexed: 12/22/2022]
Abstract
Reversibility of dithioacetal bond formation is reported under acidic mild conditions. Its utility for dynamic combinatorial chemistry was explored by combining it with orthogonal disulfide exchange. In such a setup, thiols are positioned at the intersection of both chemistries, constituting a connecting node between temporally separated networks.
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Affiliation(s)
- A Gastón Orrillo
- Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Ocampo y Esmeralda, Rosario, 2000), Argentina
| | - Andrea M Escalante
- Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Ocampo y Esmeralda, Rosario, 2000), Argentina
| | - Ricardo L E Furlan
- Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Ocampo y Esmeralda, Rosario, 2000), Argentina. .,Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario, 2000), Argentina.
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26
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Lin CY, Giuliano MW, Ellis BD, Miller SJ, Anslyn EV. From Substituent Effects to Applications: Enhancing the Optical Response of a Four-Component Assembly for Reporting EE Values. Chem Sci 2016; 7:4085-4090. [PMID: 27904740 PMCID: PMC5125730 DOI: 10.1039/c5sc04629g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
High-throughput screening for asymmetric catalysts has stimulated an interest in optically-based enantiomeric-excess (ee) sensors, primarily for their improved time and cost efficiency when compared to the standard HPLC analysis. We present herein substituent-effect studies on a recently reported Zn(II) multicomponent assembly that is used for chiral, secondary alcohol ee detemination. The systematic altering of assemblies formed from select substituted pyridyl ligands pointed to the conclusion that steric effects dominate the mode of interaction at the pyridyl 3- and 6- positions. From these results we identified a new Zn(II)-centered multicomponent assembly with a higher dynamic range than previously reported. Calibration curves of the CD signals resulting from the new assembly led to an ee assay with a 1.7% error. To further the utility of the new assembly, a correlation was developed between alcohol substituent size to the respective enantiopure CD value.
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Affiliation(s)
- Chung-Yon Lin
- Department of Chemistry, The University of Texas at Austin, Austin, TX, 78712, USA. ; Tel:+1-512-471-0068
| | - Michael W Giuliano
- Department of Chemistry and Biochemistry, College of Charleston, 66 George St., Charleston, SC, 29424, USA
| | - Bryan D Ellis
- Department of Chemistry, The University of Texas at Austin, Austin, TX, 78712, USA. ; Tel:+1-512-471-0068
| | - Scott J Miller
- Department of Chemistry, Yale University, 225 Prospect Street, Post Office Box 208107, New Haven, CT 06520-8107, USA
| | - Eric V Anslyn
- Department of Chemistry, The University of Texas at Austin, Austin, TX, 78712, USA. ; Tel:+1-512-471-0068
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27
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Wang C, Jia H, Li Z, Zhang H, Zhao B. Palladium-catalyzed C-3 desulfitative arylation of indolizines with sodium arylsulfinates and arylsulfonyl hydrazides. RSC Adv 2016. [DOI: 10.1039/c5ra25504j] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Derivatized indolizines were efficiently prepared by direct C-3 arylation of indolizines using sodium arylsulfinates and arylsulfonyl hydrazides in good yields.
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Affiliation(s)
- Chunjie Wang
- College of Chemistry and Chemical Engineering
- Zhoukou Normal University
- Zhoukou
- China
| | - Huali Jia
- College of Chemistry and Chemical Engineering
- Zhoukou Normal University
- Zhoukou
- China
| | - Zhiwei Li
- College of Chemistry and Chemical Engineering
- Zhoukou Normal University
- Zhoukou
- China
| | - Hui Zhang
- College of Chemistry and Chemical Engineering
- Zhoukou Normal University
- Zhoukou
- China
| | - Baoli Zhao
- Institute of Applied Chemistry and Department of Chemistry
- Shaoxing University
- Shaoxing
- China
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28
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Raje S, Gurusamy S, Koner A, Mehrotra S, Jennifer SJ, Vasudev PG, Butcher RJ, Angamuthu R. Multicomponent One-pot Reactions Towards the Synthesis of Stereoisomers of Dipicolylamine Complexes. Chem Asian J 2015; 11:128-35. [PMID: 26415522 DOI: 10.1002/asia.201500889] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Indexed: 11/11/2022]
Abstract
Reported are multi-component one-pot syntheses of chiral complexes [M(L(R) OR')Cl2 ] or [M(L(R) SR')Cl2 ] from the mixture of an N-substituted ethylenediamine, pyridine-2-carboxaldehyde, a primary alcohol or thiol and MCl2 utilizing in-situ formed cyclized Schiff bases where a C-O bond, two stereocenters, and three C-N bonds are formed (M=Zn, Cu, Ni, Cd; R=Et, Ph; R'=Me, Et, nPr, nBu). Tridentate ligands L(R) OR' and L(R) SR' comprise two chiral centers and a hemiaminal ether or hemiaminal thioether moiety on the dipicolylamine skeleton. Syn-[Zn(L(Ph) OMe)Cl2 ] precipitates out readily from the reaction mixture as a major product whereas anti-[Zn(L(Ph) OMe)Cl2 ] stays in solution as minor product. Both syn-[Zn(L(Ph) OMe)Cl2 ] and anti-[Zn(L(Ph) OMe)Cl2 ] were characterized using NMR spectroscopy and mass spectrometry. Solid-state structures revealed that syn-[Zn(L(Ph) OMe)Cl2 ] adopted a square pyramidal geometry while anti-[Zn(L(Ph) OMe)Cl2 ] possesses a trigonal bipyramidal geometry around the Zn centers. The scope of this method was shown to be wide by varying the components of the dynamic coordination assembly, and the structures of the complexes isolated were confirmed by NMR spectroscopy, mass spectrometry, and X-ray crystallography. Syn complexes were isolated as major products with Zn(II) and Cu(II) , and anti complexes were found to be major products with Ni(II) and Cd(II) . Hemiaminals and hemiaminal ethers are known to be unstable and are seldom observed as part of cyclic organic compounds or as coordinated ligands assembled around metals. It is now shown, with the support of experimental results, that linear hemiaminal ethers or thioethers can be assembled without the assistance of Lewis acidic metals in the multi-component assembly, and a possible pathway of the formation of hemiaminal ethers has been proposed.
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Affiliation(s)
- Sakthi Raje
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sureshbabu Gurusamy
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Abhishek Koner
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sonam Mehrotra
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Samson Jegan Jennifer
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Prema G Vasudev
- Metabolic and Structural Biology Division, CSIR-Central Institute of Medicinal and Aromatic Plants (CIMAP), Lucknow, 226015, India
| | - Ray J Butcher
- Department of Chemistry, Howard University, Washington, D.C., 20059, USA
| | - Raja Angamuthu
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India.
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29
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Wajda-Hermanowicz K, Pieniążczak D, Zatajska A, Wróbel R, Drabent K, Ciunik Z. A Study on the Condensation Reaction of 4-Amino-3,5-dimethyl-1,2,4-triazole with Benzaldehydes: Structure and Spectroscopic Properties of Some New Stable Hemiaminals. Molecules 2015; 20:17109-31. [PMID: 26393552 PMCID: PMC6332017 DOI: 10.3390/molecules200917109] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 09/07/2015] [Accepted: 09/09/2015] [Indexed: 11/26/2022] Open
Abstract
Studies on the stable hemiaminals and Schiff bases formation in the reaction of substituted benzaldehydes with primary 3,5-dimethyl-1,2,4-triazole 4-amine were carried out under neutral conditions. These products were investigated by IR, Raman, MS, 1H- and 13C-NMR spectra as well as by X-ray crystallography. The effect of reaction conditions: temperature, polarity of the solvents utilized, substrate concentration and the ortho and para benzaldehyde substituents on the yield of products was also examined.
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Affiliation(s)
| | - Damian Pieniążczak
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, Wrocław 50-383, Poland.
| | - Aleksandra Zatajska
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, Wrocław 50-383, Poland.
| | - Robert Wróbel
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, Wrocław 50-383, Poland.
| | - Krzysztof Drabent
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, Wrocław 50-383, Poland.
| | - Zbigniew Ciunik
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, Wrocław 50-383, Poland.
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30
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Zhou Y, Ren Y, Zhang L, You L, Yuan Y, Anslyn EV. Dynamic covalent binding and chirality sensing of mono secondary amines with a metal-templated assembly. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.03.121] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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31
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Song Y, Nayab S, Jeon J, Park SH, Lee H. Cadmium(II) complexes containing N′-substituted N,N-di(2-picolyl)amine: The formation of monomeric versus dimeric complexes is affected by the N′-substitution group on the amine moiety. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.02.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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32
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Zhou Y, Yuan Y, You L, Anslyn EV. Dynamic Aminal-Based TPA Ligands. Chemistry 2015; 21:8207-13. [DOI: 10.1002/chem.201500105] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Indexed: 12/21/2022]
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33
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You L, Zha D, Anslyn EV. Recent Advances in Supramolecular Analytical Chemistry Using Optical Sensing. Chem Rev 2015; 115:7840-92. [PMID: 25719867 DOI: 10.1021/cr5005524] [Citation(s) in RCA: 624] [Impact Index Per Article: 69.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Lei You
- †State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 35002, People's Republic of China
| | - Daijun Zha
- †State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 35002, People's Republic of China
| | - Eric V Anslyn
- ‡Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
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34
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Zhou Y, Ye H, You L. Reactivity-based dynamic covalent chemistry: reversible binding and chirality discrimination of monoalcohols. J Org Chem 2015; 80:2627-33. [PMID: 25674707 DOI: 10.1021/jo502801g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In an effort to develop reactivity-based dynamic covalent bonding and to expand the scope and application of the dynamic covalent chemistry, in situ-generated simple generic iminium ions were utilized for the dynamic covalent binding of monoalcohols with high affinity. Hammett analysis was conducted to manipulate the equilibrium and correlate with the reactivity of reactants. The structural features of aldehydes and secondary amines were identified, and both polar and steric effects have significant impact on the binding. In particular, the substrates which can participate in π-π and polar-π interactions are able to afford apparent equilibrium constants in the magnitude of 10(4) M(-2), demonstrating the power of weak supramolecular forces to stabilize the dynamic covalent assembly. The generality of the assembly was validated with a series of mono secondary alcohols. To showcase the practicality of our system, chirality discrimination and ee measurement of chiral secondary alcohols were achieved.
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Affiliation(s)
- Yuntao Zhou
- State Key Laboratory of Structural Chemistry, Fujian, Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fujian 350002, P. R. China
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35
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Wu X, Busschaert N, Wells NJ, Jiang YB, Gale PA. Dynamic Covalent Transport of Amino Acids across Lipid Bilayers. J Am Chem Soc 2015; 137:1476-84. [DOI: 10.1021/ja510063n] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Xin Wu
- Chemistry, University of Southampton, Southampton, SO17 1BJ, U.K
| | | | - Neil J. Wells
- Chemistry, University of Southampton, Southampton, SO17 1BJ, U.K
| | - Yun-Bao Jiang
- Department
of Chemistry, College of Chemistry and Chemical Engineering, and the
MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Xiamen University, Xiamen 361005, China
| | - Philip A. Gale
- Chemistry, University of Southampton, Southampton, SO17 1BJ, U.K
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36
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Jo HH, Edupuganti R, You L, Dalby KN, Anslyn EV. Mechanistic Studies on Covalent Assemblies of Metal-Mediated Hemi-Aminal Ethers. Chem Sci 2015; 6:158-164. [PMID: 25530834 PMCID: PMC4267293 DOI: 10.1039/c4sc02495h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The use of reversible covalent bonding in a four-component assembly incorporating chiral alcohols was recently reported to give a method for determining the enantiomeric excess of the alcohols via CD spectroscopy.
The use of reversible covalent bonding in a four-component assembly incorporating chiral alcohols was recently reported to give a method for determining the enantiomeric excess of the alcohols via CD spectroscopy. Experiments that probe the mechanism of this assembly, which consists of 2-formylpyridine (2-PA), dipicolylamine (DPA), Zn(ii) and alcohols to yield zinc complexes of tren-like ligands, are presented. The studies focus upon the mechanism of conversion of a hemi-aminal (1) to a hemi-aminal ether (3), thereby incorporating the fourth component. It was found that molecular sieves along with 3 to 4 equivalents of alcohol are required to drive the conversion of 1 to 3. Attempts to isolate an intermediate in this reaction via addition of strong Lewis acids led to the discovery of a five-membered ring pyridinium salt (5), but upon exposure to Zn(ii) and alcohols gave different products to the assembly. This was interpreted to support the intermediacy of an iminium species. Kinetic studies reveal that the conversion of 1 to 3 is zero-order in alcohol in large excesses of alcohol, supporting rate-determining formation of an intermediate prior to reaction with alcohol. Further, the magnitudes of the rate constants for interconversion of 1 and 3 are similar, supporting the notion that there are similar rate-determining steps (rds) for the forward and reverse reactions. Hammett plots show that the rds involves creation of a negative charge (interpreted as the loss of positive charge), supporting the notion that the decomplexation of Zn(ii) from the assemblies to generate apo-forms of 1 and 3 is rate-determining. The individual mechanistic conclusions are combined to create a qualitative reaction coordinate diagram for the interconversion of 1 and 3.
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Affiliation(s)
- Hyun Hwa Jo
- Department of Chemistry, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Ramakrishna Edupuganti
- Department of Chemistry, The University of Texas at Austin, Austin, Texas, 78712, USA. ; Division of Medicinal Chemistry, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Lei You
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P.R.China.
| | - Kevin N Dalby
- Division of Medicinal Chemistry, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Eric V Anslyn
- Department of Chemistry, The University of Texas at Austin, Austin, Texas, 78712, USA
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Herrmann A. Dynamic combinatorial/covalent chemistry: a tool to read, generate and modulate the bioactivity of compounds and compound mixtures. Chem Soc Rev 2014; 43:1899-933. [PMID: 24296754 DOI: 10.1039/c3cs60336a] [Citation(s) in RCA: 277] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Reversible covalent bond formation under thermodynamic control adds reactivity to self-assembled supramolecular systems, and is therefore an ideal tool to assess complexity of chemical and biological systems. Dynamic combinatorial/covalent chemistry (DCC) has been used to read structural information by selectively assembling receptors with the optimum molecular fit around a given template from a mixture of reversibly reacting building blocks. This technique allows access to efficient sensing devices and the generation of new biomolecules, such as small molecule receptor binders for drug discovery, but also larger biomimetic polymers and macromolecules with particular three-dimensional structural architectures. Adding a kinetic factor to a thermodynamically controlled equilibrium results in dynamic resolution and in self-sorting and self-replicating systems, all of which are of major importance in biological systems. Furthermore, the temporary modification of bioactive compounds by reversible combinatorial/covalent derivatisation allows control of their release and facilitates their transport across amphiphilic self-assembled systems such as artificial membranes or cell walls. The goal of this review is to give a conceptual overview of how the impact of DCC on supramolecular assemblies at different levels can allow us to understand, predict and modulate the complexity of biological systems.
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Affiliation(s)
- Andreas Herrmann
- Firmenich SA, Division Recherche et Développement, Route des Jeunes 1, B. P. 239, CH-1211 Genève 8, Switzerland.
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Grau M, Kyriacou A, Cabedo Martinez F, de Wispelaere IM, White AJP, Britovsek GJP. Unraveling the origins of catalyst degradation in non-heme iron-based alkane oxidation. Dalton Trans 2014; 43:17108-19. [DOI: 10.1039/c4dt02067g] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of iron(ii) complexes with tetradentate and pentadentate pyridyl amine ligands has been used for the oxidation of cyclohexane with hydrogen peroxide. Ligand degradation is observed under oxidising conditions via oxidative N-dealkylation.
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Affiliation(s)
- Michaela Grau
- Department of Chemistry
- Imperial College London
- London, UK
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Ramsay WJ, Ronson TK, Clegg JK, Nitschke JR. Bidirectional Regulation of Halide Binding in a Heterometallic Supramolecular Cube. Angew Chem Int Ed Engl 2013; 52:13439-43. [DOI: 10.1002/anie.201307478] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Indexed: 01/07/2023]
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Ramsay WJ, Ronson TK, Clegg JK, Nitschke JR. Bidirectional Regulation of Halide Binding in a Heterometallic Supramolecular Cube. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201307478] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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41
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Hamieh S, Saggiomo V, Nowak P, Mattia E, Ludlow RF, Otto S. A “Dial-A-Receptor” Dynamic Combinatorial Library. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305744] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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42
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Hamieh S, Saggiomo V, Nowak P, Mattia E, Ludlow RF, Otto S. A “Dial-A-Receptor” Dynamic Combinatorial Library. Angew Chem Int Ed Engl 2013; 52:12368-72. [DOI: 10.1002/anie.201305744] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Indexed: 01/28/2023]
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43
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Antico P, Capaccio V, Di Mola A, Massa A, Palombi L. Electrochemically Initiated Tandem and Sequential Conjugate Addition Processes: One-Pot Synthesis of Diverse Functionalized Isoindolinones. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200065] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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You L, Pescitelli G, Anslyn EV, Di Bari L. An Exciton-Coupled Circular Dichroism Protocol for the Determination of Identity, Chirality, and Enantiomeric Excess of Chiral Secondary Alcohols. J Am Chem Soc 2012; 134:7117-25. [DOI: 10.1021/ja301252h] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Lei You
- Department of Chemistry and
Biochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica
Industriale, Università di Pisa,
Via Risorgimento 35, I-56126 Pisa, Italy
| | - Eric V. Anslyn
- Department of Chemistry and
Biochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Lorenzo Di Bari
- Dipartimento di Chimica e Chimica
Industriale, Università di Pisa,
Via Risorgimento 35, I-56126 Pisa, Italy
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Stabilized Hemiacetal Complexes as Precursors for the Controlled Release of Bioactive Volatile Alcohols. Chem Biodivers 2012; 9:689-701. [DOI: 10.1002/cbdv.201100383] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Dynamic multi-component covalent assembly for the reversible binding of secondary alcohols and chirality sensing. Nat Chem 2011; 3:943-8. [PMID: 22109274 PMCID: PMC3226768 DOI: 10.1038/nchem.1198] [Citation(s) in RCA: 150] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Accepted: 10/11/2011] [Indexed: 12/23/2022]
Abstract
Reversible covalent bonding is often employed for the creation of novel supramolecular structures, multi-component assemblies, and sensing ensembles. In spite of remarkable success of dynamic covalent systems, the reversible binding of a mono-alcohol with high strength is challenging. Here we show that a strategy of carbonyl activation and hemiaminal ether stabilization can be embodied in a four-component reversible assembly that creates a tetradentate ligand and incorporates secondary alcohols with exceptionally high affinity. Evidence is presented that the intermediate leading to binding and exchange of alcohols is an iminium ion. Further, to demonstrate the use of this assembly process we explored chirality sensing and enantiomeric excess determinations. An induced twist in the ligand by a chiral mono-ol results in large Cotton effects in the circular dichroism spectra indicative of the alcohol’s handedness. The strategy revealed in this study should prove broadly applicable for the incorporation of alcohols into supramolecular architecture construction.
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