1
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Boratyński PJ. Stereoselective Domino Rearrangement peri-Annulation of Cinchona Alkaloid Derivatives with 8-Bromo-1-naphthyl Grignard. J Org Chem 2022; 87:11602-11607. [PMID: 35998654 PMCID: PMC9442652 DOI: 10.1021/acs.joc.2c01249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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The unexpected domino coupling and rearrangement of the Cinchona alkaloid skeleton has been found to occur in the
reaction of 9-chloro-9-deoxy-alkaloids with Grignards from peri-dihalogenonaphthalene. The cyclization and migration
of the central quinuclidinylmethyl group (C9) from position C-4′
to position C-3′ of quinoline formed a novel chiral ring system
of 5-aza-7H-benzo[no]tetraphene,
yielding products of unlike configuration. The proposed
reaction pathway involves radical intermediates.
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Affiliation(s)
- Przemysław J Boratyński
- Department of Organic and Medicinal Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 26, Wrocław 50-370, Poland
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2
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NAKATANI K. Possibilities and challenges of small molecule organic compounds for the treatment of repeat diseases. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2022; 98:30-48. [PMID: 35013029 PMCID: PMC8795530 DOI: 10.2183/pjab.98.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 11/11/2021] [Indexed: 06/14/2023]
Abstract
The instability of repeat sequences in the human genome results in the onset of many neurological diseases if the repeats expand above a certain threshold. The transcripts containing long repeats sequester RNA binding proteins. The mechanism of repeat instability involves metastable slip-out hairpin DNA structures. Synthetic organic chemists have focused on the development of small organic molecules targeting repeat DNA and RNA sequences to treat neurological diseases with repeat-binding molecules. Our laboratory has studied a series of small molecules binding to mismatched base pairs and found molecules capable of binding CAG repeat DNA, which causes Huntington's disease upon expansion, CUG repeat RNA, a typical toxic RNA causing myotonic dystrophy type 1, and UGGAA repeat RNA causing spinocerebellar ataxia type 31. These molecules exhibited significant beneficial effects on disease models in vivo, suggesting the possibilities for small molecules as drugs for treating these neurological diseases.
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Affiliation(s)
- Kazuhiko NAKATANI
- SANKEN, The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, Japan
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3
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Feng Y, Philp D. A Molecular Replication Process Drives Supramolecular Polymerization. J Am Chem Soc 2021; 143:17029-17039. [PMID: 34617739 DOI: 10.1021/jacs.1c06404] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Supramolecular polymers are materials in which the connections between monomers in the polymer main chain are non-covalent bonds. This area has seen rapid expansion in the last two decades and has been exploited in several applications. However, suitable contiguous hydrogen-bond arrays can be difficult to synthesize, placing some limitations on the deployment of supramolecular polymers. We have designed a hydrogen-bonded polymer assembled from a bifunctional monomer composed of two replicating templates separated by a rigid spacer. This design allows the autocatalytic formation of the polymer main chain through the self-templating properties of the replicators and drives the synthesis of the bifunctional monomer from its constituent components in solution. The template-directed 1,3-dipolar cycloaddition reaction between nitrone and maleimide proceeds with high diastereoselectivity, affording the bifunctional monomer. The high binding affinity between the self-complementary replicating templates that allows the bifunctional monomer to polymerize in solution is derived from the positive cooperativity associated with this binding process. The assembly of the polymer in solution has been investigated by diffusion-ordered NMR spectroscopy. Both microcrystalline and thin films of the polymeric material can be prepared readily and have been characterized by powder X-ray diffraction and scanning electron microscopy. These results demonstrate that the approach described here is a valid one for the construction of supramolecular polymers and can be extended to systems where the rigid spacer between the replicating templates is replaced by one carrying additional function.
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Affiliation(s)
- Yuanning Feng
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Douglas Philp
- School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K
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4
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Bitsi SL, Stogiou M, Costanzo S, Stiakakis E, Vlassopoulos D, Nika A, Chatzichristidi M, Pitsikalis M. Synthesis and characterization of low molar mass end-functionalized homo- and copolymers with ureidopyrimidone, UPy groups. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04642-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Bitsi SL, Droulia M, Pitsikalis M. Supramolecular Triblock Copolymers Through the Formation of Hydrogen Bonds: Synthesis, Characterization, Association Effects in Solvents of Different Polarity. Polymers (Basel) 2020; 12:polym12020468. [PMID: 32085471 PMCID: PMC7077705 DOI: 10.3390/polym12020468] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 02/13/2020] [Accepted: 02/13/2020] [Indexed: 11/16/2022] Open
Abstract
Anionic polymerization techniques were employed for the synthesis of linear polystyrene (PS) and block copolymer of PS and polyisoprene (PI) PS-b-PI bearing end hydroxyl groups. Following suitable organic chemistry transformation, the –OH end groups were converted to moieties able to form complementary hydrogen bonds including 2,6-diaminopurine, Dap, thymine, Thy, and the so-called Hamilton receptor, Ham. The formation of hydrogen bonds was examined between the polymers PS-Dap and PS-b-PI-Thy, along with the polymers PS-Ham and PS-b-PI-Thy. The conditions under which supramolecular triblock copolymers are formed and the possibility to form aggregates were examined both in solution and in the solid state using a variety of techniques such as 1H-NMR spectroscopy, size exclusion chromatography (SEC), dilute solution viscometry, dynamic light scattering (DLS), thermogravimetric analysis (TGA), differential thermogravimetry (DTG), and differential scanning calorimetry (DSC).
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6
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Catarzi D, Varano F, Varani K, Vincenzi F, Pasquini S, Dal Ben D, Volpini R, Colotta V. Amino-3,5-Dicyanopyridines Targeting the Adenosine Receptors Ranging from Pan Ligands to Combined A 1/A 2B Partial Agonists. Pharmaceuticals (Basel) 2019; 12:ph12040159. [PMID: 31652622 PMCID: PMC6958422 DOI: 10.3390/ph12040159] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 10/17/2019] [Accepted: 10/18/2019] [Indexed: 12/17/2022] Open
Abstract
The amino-3,5-dicyanopyridine derivatives belong to an intriguing series of adenosine receptor (AR) ligands that has been developed by both academic researchers and industry. Indeed, the studies carried out to date underline the versatility of the dicyanopyridine scaffold to obtain AR ligands with not only a wide range of affinities but also with diverse degrees of efficacies at the different ARs. These observations prompted us to investigate on the structure-activity relationships (SARs) of this series leading to important previously reported results. The present SAR study has helped to confirm the 1H-imidazol-2-yl group at R2 position as an important feature for producing potent AR agonists. Moreover, the nature of the R1 substituent highly affects not only affinity/activity at the hA1 and hA2B ARs but also selectivity versus the other subtypes. Potent hA1 and hA2B AR ligands were developed, and among them, the 2-amino-6-[(1H-imidazol-2-ylmethyl)sulfanyl]-4-[4-(prop-2-en-1-yloxy)phenyl]pyridine-3,5-dicarbonitrile (3) is active in the low nanomolar range at these subtypes and shows a good trend of selectivity versus both the hA2A and hA3 ARs. This combined hA1/hA2B partial agonist activity leads to a synergistic effect on glucose homeostasis and could potentially be beneficial in treating diabetes and related complications.
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Affiliation(s)
- Daniela Catarzi
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmaceutica e Nutraceutica, Università degli Studi di Firenze, Via Ugo Schiff, 6, 50019 Sesto Fiorentino, Italy.
| | - Flavia Varano
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmaceutica e Nutraceutica, Università degli Studi di Firenze, Via Ugo Schiff, 6, 50019 Sesto Fiorentino, Italy.
| | - Katia Varani
- Dipartimento di Scienze Mediche, Sezione di Farmacologia, Università degli Studi di Ferrara, Via Fossato di Mortara 17-19, 44121 Ferrara, Italy.
| | - Fabrizio Vincenzi
- Dipartimento di Scienze Mediche, Sezione di Farmacologia, Università degli Studi di Ferrara, Via Fossato di Mortara 17-19, 44121 Ferrara, Italy.
| | - Silvia Pasquini
- Dipartimento di Scienze Mediche, Sezione di Farmacologia, Università degli Studi di Ferrara, Via Fossato di Mortara 17-19, 44121 Ferrara, Italy.
| | - Diego Dal Ben
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Università degli Studi di Camerino, via S.Agostino 1, 62032 Camerino (MC); Italy.
| | - Rosaria Volpini
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Università degli Studi di Camerino, via S.Agostino 1, 62032 Camerino (MC); Italy.
| | - Vittoria Colotta
- Dipartimento di Neuroscienze, Psicologia, Area del Farmaco e Salute del Bambino, Sezione di Farmaceutica e Nutraceutica, Università degli Studi di Firenze, Via Ugo Schiff, 6, 50019 Sesto Fiorentino, Italy.
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7
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Cyclic acyl amidines as unexpected C4-donors for fully substituted pyridine ring formation in the base mediated reaction with malononitrile. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.06.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Tong F, Linares-Mendez IJ, Han YF, Wisner JA, Wang HB. Readily functionalized AAA-DDD triply hydrogen-bonded motifs. Org Biomol Chem 2018; 16:2947-2954. [PMID: 29623318 DOI: 10.1039/c8ob00479j] [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
Herein we present a new, readily functionalized AAA-DDD hydrogen bond array. A novel AAA monomeric unit (3a-b) was obtained from a two-step synthetic procedure starting with 2-aminonicotinaldehyde via microwave radiation (overall yield of 52-66%). 1H NMR and fluorescence spectroscopy confirmed the complexation event with a calculated association constant of 1.57 × 107 M-1. Likewise, the usefulness of this triple hydrogen bond motif in supramolecular polymerization was demonstrated through viscosity measurements in a crosslinked supramolecular alternating copolymer.
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Affiliation(s)
- Feng Tong
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan, Hubei 430056, China.
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9
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Design and synthesis of some new piritrexim analogs as potential anticancer agents. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-017-3132-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Tetrachlorosilane and zinc chloride as a binary reagent for the preparation of 2-amino-6-chloropyridine-3,5-dicarbonitrile derivatives. Chem Heterocycl Compd (N Y) 2017. [DOI: 10.1007/s10593-017-2089-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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11
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Wang H, Ji X, Li Z, Huang F. Fluorescent Supramolecular Polymeric Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29. [PMID: 28198107 DOI: 10.1002/adma.201606117] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Revised: 12/13/2016] [Indexed: 05/07/2023]
Abstract
Fluorescent supramolecular polymeric materials are rising stars in the field of fluorescent materials not only because of the inherent optoelectronic properties originating from their chromophores, but also due to the fascinating stimuli-responsiveness and reversibility coming from their noncovalent connections. Especially, these noncovalent connections influence the fluorescence properties of the chromophores because their state of aggregation and energy transfer can be regulated by the assembly-disassembly process. Considering these unique properties, fluorescent supramolecular polymeric materials have facilitated the evolution of new materials useful for applications in fluorescent sensors, probes, as imaging agents in biological systems, light-emitting diodes, and organic electronic devices. In this Review, fluorescent supramolecular polymeric materials are classified depending on the types of main driving forces for supramolecular polymerization, including multiple hydrogen bonding, electrostatic interactions, π-π stacking interactions, metal-coordination, van der Waals interactions and host-guest interactions. Through the summary of the studies about fluorescent supramolecular polymeric materials, the status quo of this research field is assessed. Based on existing challenges, directions for the future development of this field are furnished.
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Affiliation(s)
- Hu Wang
- State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xiaofan Ji
- State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Zhengtao Li
- State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Feihe Huang
- State Key Laboratory of Chemical Engineering, Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
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12
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Mobinikhaledi A, Asadbegi S, Bodaghifard MA. Convenient, multicomponent, one-pot synthesis of highly substituted pyridines under solvent-free conditions. SYNTHETIC COMMUN 2016. [DOI: 10.1080/00397911.2016.1218516] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
| | - Sajad Asadbegi
- Department of Chemistry, Faculty of Science, Arak University, Arak, Iran
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13
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Xing K, Chatterjee S, Saito T, Gainaru C, Sokolov AP. Impact of Hydrogen Bonding on Dynamics of Hydroxyl-Terminated Polydimethylsiloxane. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00262] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Kunyue Xing
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Sabornie Chatterjee
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Tomonori Saito
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Catalin Gainaru
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
- Fakultät
für Physik, Technische Universität Dortmund, 44221 Dortmund, Germany
| | - Alexei P. Sokolov
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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14
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Zimmerman SC. A journey in bioinspired supramolecular chemistry: from molecular tweezers to small molecules that target myotonic dystrophy. Beilstein J Org Chem 2016; 12:125-38. [PMID: 26877815 PMCID: PMC4734311 DOI: 10.3762/bjoc.12.14] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 01/06/2016] [Indexed: 12/02/2022] Open
Abstract
This review summarizes part of the author’s research in the area of supramolecular chemistry, beginning with his early life influences and early career efforts in molecular recognition, especially molecular tweezers. Although designed to complex DNA, these hosts proved more applicable to the field of host–guest chemistry. This early experience and interest in intercalation ultimately led to the current efforts to develop small molecule therapeutic agents for myotonic dystrophy using a rational design approach that heavily relies on principles of supramolecular chemistry. How this work was influenced by that of others in the field and the evolution of each area of research is highlighted with selected examples.
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Affiliation(s)
- Steven C Zimmerman
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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15
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Huang DW, Liu YH, Peng SM, Liu ST. Dicopper Complexes with Anthyridine-Based Ligands: Coordination and Catalytic Activity. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b00895] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Da-wei Huang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Yi-Hung Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shie-Ming Peng
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shiuh-Tzung Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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16
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Papmeyer M, Vuilleumier CA, Pavan GM, Zhurov KO, Severin K. Molecularly Defined Nanostructures Based on a Novel AAA-DDD Triple Hydrogen-Bonding Motif. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201510423] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Marcus Papmeyer
- Institut des Sciences et Ingénierie Chimiques; École Polytechnique Fédérale de Lausanne (EPFL; Switzerland
| | - Clément A. Vuilleumier
- Institut des Sciences et Ingénierie Chimiques; École Polytechnique Fédérale de Lausanne (EPFL; Switzerland
| | - Giovanni M. Pavan
- Department of Innovative Technologies; University of Applied Sciences and Arts of Southern Switzerland; Galleria 2 6928 Manno Switzerland
| | - Konstantin O. Zhurov
- Institut des Sciences et Ingénierie Chimiques; École Polytechnique Fédérale de Lausanne (EPFL; Switzerland
| | - Kay Severin
- Institut des Sciences et Ingénierie Chimiques; École Polytechnique Fédérale de Lausanne (EPFL; Switzerland
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17
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Papmeyer M, Vuilleumier CA, Pavan GM, Zhurov KO, Severin K. Molecularly Defined Nanostructures Based on a Novel AAA-DDD Triple Hydrogen-Bonding Motif. Angew Chem Int Ed Engl 2015; 55:1685-9. [PMID: 26695538 DOI: 10.1002/anie.201510423] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Indexed: 11/06/2022]
Abstract
A facile and flexible method for the synthesis of a new AAA-DDD triple hydrogen-bonding motif is described. Polytopic supramolecular building blocks with precisely oriented AAA and DDD groups are thus accessible in few steps. These building blocks were used for the assembly of large macrocycles featuring four AAA-DDD interactions and a macrobicyclic complex with a total of six AAA-DDD interactions.
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Affiliation(s)
- Marcus Papmeyer
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL, Switzerland
| | - Clément A Vuilleumier
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL, Switzerland
| | - Giovanni M Pavan
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Galleria 2, 6928, Manno, Switzerland
| | - Konstantin O Zhurov
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL, Switzerland
| | - Kay Severin
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL, Switzerland.
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18
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Hirahara M, Nagai S, Takahashi K, Saito K, Yui T, Yagi M. New Series of Dinuclear Ruthenium(II) Complexes Synthesized Using Photoisomerization for Efficient Water Oxidation Catalysis. Inorg Chem 2015. [PMID: 26200106 DOI: 10.1021/acs.inorgchem.5b01264] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new series of proximal,proximal-[Ru2(tpy)2(L)XY](n+) (p,p-Ru2XY, tpy = 2,2':6',2″-terpyridine, L = 5-phenyl-2,8-di(2-pyridyl)-1,9,10-anthyridine, X and Y = other coordination sites) were synthesized using photoisomerization of a mononuclear complex. The p,p-Ru2XY complexes undergo unusual reversible bridge-exchange reactions to generate p,p-Ru2(μ-Cl), p,p-Ru2(μ-OH), and p,p-Ru2(OH)(OH2) with μ-Cl, μ-OH, as well as hydroxo and aquo ligands at X and Y sites of p,p-Ru2XY, respectively. The geometric and electronic structures of these complexes were characterized based on UV-vis and (1)H NMR spectra, X-ray crystallography, and density functional theory (DFT) calculations. (1)H NMR data showed C2 symmetry of p,p-Ru2(OH)(OH2) with the distorted L chelate and nonequivalence of two tpy ligands, in contrast to the C2v symmetry of p,p-Ru2(μ-Cl) and p,p-Ru2(μ-OH). However, irrespective of the lower symmetry, p,p-Ru2(OH)(OH2) is predominantly formed in neutral and weakly basic conditions due to the specially stabilized core structure by multiple hydrogen-bond interactions among aquo, hydroxo, and backbone L ligands. The electrochemical data suggested that p,p-Ru2(OH)(OH2) (Ru(II)-OH:Ru(II)-OH2) is oxidized to the Ru(III)-OH:Ru(III)-OH state at 0.64 V vs saturated calomel electrode (SCE) and further to Ru(IV)═O:Ru(IV)-OH at 0.79 V by successive 1-proton-coupled 2-electron processes at pH 7.0. The cyclic voltammogram data exhibited that the p,p-Ru2(OH)(OH2) complex works more efficiently for electrocatalytic water oxidation, compared with a similar mononuclear complex distal-[Ru(tpy)(L)OH2](2+) (d-RuOH2) and p,p-Ru2(μ-Cl) and p,p-Ru2(μ-OH), showing that the p,p-Ru2 core structure with aquo and hydroxo ligands is important for efficient electrocatalytic water oxidation. Bulk electrolysis of the p,p-Ru2(OH)(OH2) solution corroborated the electrocatalytic cycle involving the Ru(III)-OH:Ru(III)-OH state species as a resting state. The mechanistic insight into O-O bond formation for O2 production was provided by the isotope effect on electrocatalytic water oxidation by p,p-Ru2(OH)(OH2) and d-RuOH2 in H2O and D2O media.
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Affiliation(s)
- Masanari Hirahara
- †Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Sho Nagai
- †Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Kosuke Takahashi
- †Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Kenji Saito
- †Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Tatsuto Yui
- †Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Masayuki Yagi
- †Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 950-2181, Japan.,§Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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19
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Yang L, Tan X, Wang Z, Zhang X. Supramolecular Polymers: Historical Development, Preparation, Characterization, and Functions. Chem Rev 2015; 115:7196-239. [DOI: 10.1021/cr500633b] [Citation(s) in RCA: 906] [Impact Index Per Article: 100.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Liulin Yang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xinxin Tan
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Zhiqiang Wang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xi Zhang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
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20
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Zhang DW, Wang H, Li ZT. Hydrogen Bonding Motifs: New Progresses. LECTURE NOTES IN CHEMISTRY 2015. [DOI: 10.1007/978-3-662-45756-6_1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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21
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Han YF, Chen WQ, Wang HB, Yuan YX, Wu NN, Song XZ, Yang L. An AAA-DDD triply hydrogen-bonded complex easily accessible for supramolecular polymers. Chemistry 2014; 20:16980-6. [PMID: 25339060 DOI: 10.1002/chem.201404996] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Indexed: 11/06/2022]
Abstract
For a complementary hydrogen-bonded complex, when every hydrogen-bond acceptor is on one side and every hydrogen-bond donor is on the other, all secondary interactions are attractive and the complex is highly stable. AAA-DDD (A=acceptor, D=donor) is considered to be the most stable among triply hydrogen-bonded sequences. The easily synthesized and further derivatized AAA-DDD system is very desirable for hydrogen-bonded functional materials. In this case, AAA and DDD, starting from 4-methoxybenzaldehyde, were synthesized with the Hantzsch pyridine synthesis and Friedländer annulation reaction. The association constant determined by fluorescence titration in chloroform at room temperature is 2.09×10(7) M(-1) . The AAA and DDD components are not coplanar, but form a V shape in the solid state. Supramolecular polymers based on AAA-DDD triply hydrogen bonded have also been developed. This work may make AAA-DDD triply hydrogen-bonded sequences easily accessible for stimuli-responsive materials.
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Affiliation(s)
- Yi-Fei Han
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083 (P.R. China)
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Chioua M, Samadi A, Soriano E, Infantes L, Marco-Contelles J. Silver Triflate-Catalyzed Cyclization of 2-Amino-6-propargyl- amineazines Leading to Iminoimidazoazines. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300799] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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The Two Faces of Hydrogen-Bond Strength on Triple AAA-DDD Arrays. Chemphyschem 2013; 14:3994-4001. [DOI: 10.1002/cphc.201300639] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 09/26/2013] [Indexed: 11/07/2022]
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Huang DW, Lo YH, Liu YH, Peng SM, Liu ST. Cyclometalation of Anthyridine-Based Ligands with Dirhodium Acetates: Structure and Catalytic Activity. Organometallics 2013. [DOI: 10.1021/om400508a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Da-wei Huang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
| | - Ying-Hao Lo
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
| | - Yi-Hung Liu
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
| | - Shie-Ming Peng
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
| | - Shiuh-Tzung Liu
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
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Leigh DA, Robertson CC, Slawin AMZ, Thomson PIT. AAAA-DDDD Quadruple Hydrogen-Bond Arrays Featuring NH···N and CH···N Hydrogen Bonds. J Am Chem Soc 2013; 135:9939-43. [DOI: 10.1021/ja404504m] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- David A. Leigh
- School of Chemistry, University of Edinburgh, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, U.K
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13
9PL, U.K
| | - Craig C. Robertson
- School of Chemistry, University of Edinburgh, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, U.K
| | - Alexandra M. Z. Slawin
- School of Chemistry, University of St. Andrews, Purdie Building, St. Andrews,
Fife KY16 9ST, U.K
| | - Patrick I. T. Thomson
- School of Chemistry, University of Edinburgh, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, U.K
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Lo Y, Liu Y, Peng S, Liu S. Ruthenium Complexes with an Anthyridine‐based Ligand. Synthesis, Characterization and Catalytic Activity. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300084] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ying‐Hao Lo
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, ROC
| | - Yi‐Hung Liu
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, ROC
| | - Shie‐Ming Peng
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, ROC
| | - Shiuh‐Tzung Liu
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, ROC
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Samadi A, Estrada M, Pérez C, Rodríguez-Franco MI, Iriepa I, Moraleda I, Chioua M, Marco-Contelles J. Pyridonepezils, new dual AChE inhibitors as potential drugs for the treatment of Alzheimer's disease: synthesis, biological assessment, and molecular modeling. Eur J Med Chem 2012; 57:296-301. [PMID: 23078965 DOI: 10.1016/j.ejmech.2012.09.030] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Revised: 09/20/2012] [Accepted: 09/24/2012] [Indexed: 11/17/2022]
Abstract
The synthesis, biological assessment and molecular modeling of new pyridonepezils1-8, able to inhibit human acetylcholinesterase (hAChE) and human butyrylcholinesterase (hBuChE), are described. The new compounds have been designed as hybrids resulting from a conjunctive approach that combines the N-benzylpiperidine moiety, present in donepezil, and the 2-amino-6-chloropyridine heterocyclic ring system, connected by an appropriate polymethylene linker. Compounds 1-8 were prepared by reaction of 2-amino-6-chloro-4-phenylpyridine-3,5-dicarbonitrile (13) [or 2-amino-6-chloropyridine-3,5-dicarbonitrile (14)] with 2-(1-benzylpiperidin-4-yl)alkylamines (9-12). The biological evaluation of molecules 1-8 showed that compounds 1-6 are potent AChE inhibitors, in the submicromolar, while compounds 7 and 8 are on the nanomolar range, the most potent, 2-amino-6-((3-(1-benzylpiperidin-4-yl)propyl)amino)pyridine-3,5-dicarbonitrile (7), showing a IC(50) (hAChE) = 9.4 ± 0.4 nM. Inhibitors 2-8 are permeable as determined in the PAMPA assay. Compared to donepezil, compound 7 is in the same range of inhibitory activity for hAChE, and 703-fold more selective for hAChE than for hBuChE. Molecular modeling investigation on pyridonepezil7 supports its dual AChE inhibitory profile, binding simultaneously at the catalytic active and at peripheral anionic sites of the enzyme. The theoretical ADME analysis of pyridonepezils1-8 has been carried out. Overall, compound 7, a potent and selective dual AChEI, can be considered as a candidate with potential impact for further pharmacological development in Alzheimer's therapy.
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Affiliation(s)
- Abdelouahid Samadi
- Laboratorio de Química Médica, Instituto de Química Orgánica General (CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain.
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Maksimova VN, Ershov OV, Lipin KV, Eremkin AV, Nasakin OE. Regioselective reaction of 5,6-dialkyl-2-halopyridine-3,4-dicarbonitriles with ammonia. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2012. [DOI: 10.1134/s1070428012030153] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Samadi A, Silva D, Chioua M, do Carmo Carreiras M, Marco-Contelles J. Microwave Irradiation–Assisted Amination of 2-Chloropyridine Derivatives with Amide Solvents. SYNTHETIC COMMUN 2011. [DOI: 10.1080/00397911.2010.515360] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Shiri M, Zolfigol MA, Kruger HG, Tanbakouchian Z. Friedländer Annulation in the Synthesis of Azaheterocyclic Compounds. ADVANCES IN HETEROCYCLIC CHEMISTRY 2011. [DOI: 10.1016/b978-0-12-385464-3.00002-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Sucunza D, Samadi A, Chioua M, Silva DB, Yunta C, Infantes L, Carmo Carreiras M, Soriano E, Marco-Contelles J. A practical two-step synthesis of imidazo[1,2-a]pyridines from N-(prop-2-yn-1-yl)pyridin-2-amines. Chem Commun (Camb) 2011; 47:5043-5. [DOI: 10.1039/c1cc10641d] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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da Silva DB, Samadi A, Infantes L, Carreiras MDC, Marco-Contelles J. Synthesis of (E)-diethyl 6,6′-(diazene-1,2-diyl)bis(5-cyano-2-methyl-4-phenylnicotinates), a new type of 2,2′-azopyridine dyes. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.09.095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Multipotent drugs with cholinergic and neuroprotective properties for the treatment of Alzheimer and neuronal vascular diseases. I. Synthesis, biological assessment, and molecular modeling of simple and readily available 2-aminopyridine-, and 2-chloropyridine-3,5-dicarbonitriles. Bioorg Med Chem 2010; 18:5861-72. [DOI: 10.1016/j.bmc.2010.06.095] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2010] [Revised: 06/22/2010] [Accepted: 06/29/2010] [Indexed: 11/21/2022]
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35
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NMR and quantum chemical studies on association of 2,6-bis(acylamino)pyridines with selected imides and 2,2′-dipyridylamine. Struct Chem 2010. [DOI: 10.1007/s11224-010-9646-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chioua M, Soriano E, Samadi A, Marco-Contelles J. Studies on the acetylation of 3,6-diamino-1H-pyrazolo[3,4-b]pyridine-5-carbonitrile derivatives. J Heterocycl Chem 2010. [DOI: 10.1002/jhet.403] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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37
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I. Borrell J, Mont N, Carrión F, Teixidó J. Cyclization of 5-Cyano-6-cyanoimino-3,4-dihydropyridin-2(1H)-ones with Amines. HETEROCYCLES 2010. [DOI: 10.3987/com-09-11860] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Blight BA, Camara-Campos A, Djurdjevic S, Kaller M, Leigh DA, McMillan FM, McNab H, Slawin AMZ. AAA-DDD triple hydrogen bond complexes. J Am Chem Soc 2009; 131:14116-22. [PMID: 19746984 DOI: 10.1021/ja906061v] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Experiment and theory both suggest that the AAA-DDD pattern of hydrogen bond acceptors (A) and donors (D) is the arrangement of three contiguous hydrogen bonding centers that results in the strongest association between two species. Murray and Zimmerman prepared the first example of such a system (complex 3*2) and determined the lower limit of its association constant (K(a)) in CDCl(3) to be 10(5) M(-1) by (1)H NMR spectroscopy (Murray, T. J. and Zimmerman, S. C. J. Am. Chem. Soc. 1992, 114, 4010-4011). The first cationic AAA-DDD pair (3*4(+)) was described by Bell and Anslyn (Bell, D. A. and Anslyn, E. A. Tetrahedron 1995, 51, 7161-7172), with a K(a) > 5 x 10(5) M(-1) in CH(2)Cl(2) as determined by UV-vis spectroscopy. We were recently able to quantify the strength of a neutral AAA-DDD arrangement using a more chemically stable AAA-DDD system, 6*2, which has an association constant of 2 x 10(7) M(-1) in CH(2)Cl(2) (Djurdjevic, S., Leigh, D. A., McNab, H., Parsons, S., Teobaldi, G. and Zerbetto, F. J. Am. Chem. Soc. 2007, 129, 476-477). Here we report on further AA(A) and DDD partners, together with the first precise measurement of the association constant of a cationic AAA-DDD species. Complex 6*10(+)[B(3,5-(CF(3))(2)C(6)H(3))(4)(-)] has a K(a) = 3 x 10(10) M(-1) at RT in CH(2)Cl(2), by far the most strongly bound triple hydrogen bonded system measured to date. The X-ray crystal structure of 6*10(+) with a BPh(4)(-) counteranion shows a planar array of three short (NH...N distances 1.95-2.15 A), parallel (but staggered rather than strictly linear; N-H...N angles 165.4-168.8 degrees), primary hydrogen bonds. These are apparently reinforced, as theory predicts, by close electrostatic interactions (NH-*-N distances 2.78-3.29 A) between each proton and the acceptor atoms of the adjacent primary hydrogen bonds.
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Affiliation(s)
- Barry A Blight
- School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, United Kingdom
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Chioua M, Samadi A, Soriano E, Lozach O, Meijer L, Marco-Contelles J. Synthesis and biological evaluation of 3,6-diamino-1H-pyrazolo[3,4-b]pyridine derivatives as protein kinase inhibitors. Bioorg Med Chem Lett 2009; 19:4566-9. [PMID: 19615897 DOI: 10.1016/j.bmcl.2009.06.099] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2009] [Revised: 06/29/2009] [Accepted: 06/30/2009] [Indexed: 12/15/2022]
Abstract
The synthesis and biological evaluation of a number of differently substituted 3,6-diamino-1H-pyrazolo[3,4-b]pyridine derivatives are reported. From the inhibition results on a selection of disease-relevant protein kinases [IC(50) (microM) DYRK1A=11; CDK5=0.41; GSK-3=1.5] we have observed that 3,6-diamino-4-phenyl-1H-pyrazolo[3,4-b]pyridine-5-carbonitrile (4) constitutes a potential new and simple lead compound in the search of drugs for the treatment of Alzheimer's disease.
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Affiliation(s)
- Mourad Chioua
- Laboratorio de Radicales Libres y Química Computacional (IQOG, CSIC), 28006 Madrid, Spain
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40
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Taubitz J, Lüning U. On the Importance of the Nature of Hydrogen Bond Donors in Multiple Hydrogen Bond Systems. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800589] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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41
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Carrión F, Mont N, Batllori X, Borrell JI, Teixidó J. Cyclization of 2-dicyanomethylene-1,2-dihydropyridine-3-carbonitriles with amines: a mechanistic rationalization. Tetrahedron 2007. [DOI: 10.1016/j.tet.2006.10.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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42
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43
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Kukrek A, Wang D, Hou Y, Zong R, Thummel R. Photosensitizers Containing the 1,8-Naphthyridyl Moiety and Their Use in Dye-Sensitized Solar Cells. Inorg Chem 2006; 45:10131-7. [PMID: 17140219 DOI: 10.1021/ic061022a] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Using a Friedländer condensation approach, we prepared a series of 2-(pyrid-2'-yl)-1,8-naphthyridines containing a carboethoxy group appended at the 4- and 4'-positions. Complexation of these ligands with Ru(II) and NaNCS led to the complexes [Ru(L)2(NCS)2], and subsequent hydrolysis of the ester groups afforded the carboxylic acid dyes 13b-15b. The more delocalized and electronegative nature of the 1,8-naphthyridyl moiety lowers the energy of the ligand pi*-level and extends the absorption envelope of these complexes well into the red. The system lacking a 4-carboxypyridine moiety shows poor absorbance in the blue region of the spectrum. Solar cells involving thin films of anatase TiO2 impregnated with these dyes were prepared, and their photovoltaic performance was evaluated. The incident photon-to-current efficiencies in the region beyond 625 nm were considerably greater than those of the prototype N3 dye.
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Affiliation(s)
- Ahmet Kukrek
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, USA
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44
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Karatzas A, Talelli M, Vasilakopoulos T, Pitsikalis M, Hadjichristidis N. Micellization of ω-Functionalized Diblock Copolymers in Selective Solvent. Study on the Effect of Hydrogen Bonds. Macromolecules 2006. [DOI: 10.1021/ma061396n] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. Karatzas
- Department of Chemistry, University of Athens, Panepistimiopolis Zographou 15771 Athens Greece
| | - M. Talelli
- Department of Chemistry, University of Athens, Panepistimiopolis Zographou 15771 Athens Greece
| | - T. Vasilakopoulos
- Department of Chemistry, University of Athens, Panepistimiopolis Zographou 15771 Athens Greece
| | - M. Pitsikalis
- Department of Chemistry, University of Athens, Panepistimiopolis Zographou 15771 Athens Greece
| | - N. Hadjichristidis
- Department of Chemistry, University of Athens, Panepistimiopolis Zographou 15771 Athens Greece
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45
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Cocco MT, Congiu C, Lilliu V, Onnis V. Synthesis and antiproliferative activity of 2,6-Dibenzylamino-3,5-dicyanopyridines on human cancer cell lines. Eur J Med Chem 2005; 40:1365-72. [PMID: 16137795 DOI: 10.1016/j.ejmech.2005.07.005] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2005] [Revised: 07/18/2005] [Accepted: 07/18/2005] [Indexed: 11/24/2022]
Abstract
A new series of 2,6-dibenzylamino-3,5-dicyanopyridines were synthesized and evaluated for their in vitro anticancer activity toward cell lines of nine different types of human cancer. Some of newly prepared compounds demonstrated remarkable anticancer activity against most of the tested subpanel tumor cell lines.
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Affiliation(s)
- Maria Teresa Cocco
- Dipartimento di Tossicologia, Università degli Studi di Cagliari, Via Ospedale 72-09124 Cagliari, Italy.
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46
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Todd EM, Quinn JR, Park T, Zimmerman SC. Fidelity in the supramolecular assembly of triply and quadruply hydrogen-bonded complexes. Isr J Chem 2005. [DOI: 10.1560/dqcj-1k9j-1tbt-dk5m] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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47
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Keen SP, Cowden CJ, Bishop BC, Brands KMJ, Davies AJ, Dolling UH, Lieberman DR, Stewart GW. Practical Asymmetric Synthesis of a Non-Peptidic αvβ3 Antagonist. J Org Chem 2005; 70:1771-9. [PMID: 15730300 DOI: 10.1021/jo048082n] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The development of a practical and highly convergent synthesis of an alpha(v)beta3 antagonist is described. The two key fragments present in this compound, a tetrahydropyrido[2,3-b]azepine ring system and a chiral 3-aryl-5-oxopentanoic acid, were constructed independently and then coupled at a late stage using a Wittig reaction. The pyridoazepine moiety was prepared from N-Boc 6-chloro-2-aminopyridine via directed ortho-metalation/alkylation followed by in situ cyclization. A Suzuki reaction was then used to attach the propionaldehyde side-chain required for Wittig coupling. The coupling partner was prepared from asymmetric methanolysis of a 3-substituted glutaric anhydride followed by elaboration of the acid moiety to the requisite beta-keto phosphorane. Using this route, kilogram quantities of the desired drug candidate were prepared.
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Affiliation(s)
- Stephen P Keen
- Department of Process Research, Merck Sharp & Dohme Research Laboratories, Hertford Road, Hoddesdon, Hertfordshire EN11 9BU, United Kingdom.
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Parra RD, Furukawa M, Gong B, Zeng XC. Energetics and cooperativity in three-center hydrogen bonding interactions. I. Diacetamide-X dimers (X=HCN, CH3OH). J Chem Phys 2001. [DOI: 10.1063/1.1400141] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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49
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Söntjens SHM, Sijbesma RP, van Genderen MHP, Meijer EW. Stability and Lifetime of Quadruply Hydrogen Bonded 2-Ureido-4[1H]-pyrimidinone Dimers. J Am Chem Soc 2000. [DOI: 10.1021/ja000435m] [Citation(s) in RCA: 404] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Serge H. M. Söntjens
- Contribution from the Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Rint P. Sijbesma
- Contribution from the Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Marcel H. P. van Genderen
- Contribution from the Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - E. W. Meijer
- Contribution from the Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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50
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Heteroaromatic Modules for Self-Assembly Using Multiple Hydrogen Bonds. MOLECULAR SELF-ASSEMBLY ORGANIC VERSUS INORGANIC APPROACHES 2000. [DOI: 10.1007/3-540-46591-x_3] [Citation(s) in RCA: 230] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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