1
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Neumann SE, Kwon J, Gropp C, Ma L, Giovine R, Ma T, Hanikel N, Wang K, Chen T, Jagani S, Ritchie RO, Xu T, Yaghi OM. The propensity for covalent organic frameworks to template polymer entanglement. Science 2024; 383:1337-1343. [PMID: 38513024 DOI: 10.1126/science.adf2573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 02/14/2024] [Indexed: 03/23/2024]
Abstract
The introduction of molecularly woven three-dimensional (3D) covalent organic framework (COF) crystals into polymers of varying types invokes different forms of contact between filler and polymer. Whereas the combination of woven COFs with amorphous and brittle polymethyl methacrylate results in surface interactions, the use of the liquid-crystalline polymer polyimide induces the formation of polymer-COF junctions. These junctions are generated by the threading of polymer chains through the pores of the nanocrystals, thus allowing for spatial arrangement of polymer strands. This offers a programmable pathway for unthreading polymer strands under stress and leads to the in situ formation of high-aspect-ratio nanofibrils, which dissipate energy during the fracture. Polymer-COF junctions also strengthen the filler-matrix interfaces and lower the percolation thresholds of the composites, enhancing strength, ductility, and toughness of the composites by adding small amounts (~1 weight %) of woven COF nanocrystals. The ability of the polymer strands to closely interact with the woven framework is highlighted as the main parameter to forming these junctions, thus affecting polymer chain penetration and conformation.
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Affiliation(s)
- S Ephraim Neumann
- Department of Chemistry, University of California-Berkeley, Berkeley, CA 94720, USA
- Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA
| | - Junpyo Kwon
- Department of Mechanical Engineering, University of California-Berkeley, Berkeley, CA 94720, USA
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Cornelius Gropp
- Department of Chemistry, University of California-Berkeley, Berkeley, CA 94720, USA
- Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA
| | - Le Ma
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Department of Materials Science & Engineering, University of California-Berkeley, Berkeley, CA 94720, USA
| | - Raynald Giovine
- Department of Chemistry, University of California-Berkeley, Berkeley, CA 94720, USA
| | - Tianqiong Ma
- Department of Chemistry, University of California-Berkeley, Berkeley, CA 94720, USA
- Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA
| | - Nikita Hanikel
- Department of Chemistry, University of California-Berkeley, Berkeley, CA 94720, USA
- Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA
| | - Kaiyu Wang
- Department of Chemistry, University of California-Berkeley, Berkeley, CA 94720, USA
- Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA
| | - Tiffany Chen
- Department of Chemistry, University of California-Berkeley, Berkeley, CA 94720, USA
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Shaan Jagani
- Department of Materials Science & Engineering, University of California-Berkeley, Berkeley, CA 94720, USA
| | - Robert O Ritchie
- Department of Mechanical Engineering, University of California-Berkeley, Berkeley, CA 94720, USA
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Department of Materials Science & Engineering, University of California-Berkeley, Berkeley, CA 94720, USA
| | - Ting Xu
- Department of Chemistry, University of California-Berkeley, Berkeley, CA 94720, USA
- Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Department of Materials Science & Engineering, University of California-Berkeley, Berkeley, CA 94720, USA
| | - Omar M Yaghi
- Department of Chemistry, University of California-Berkeley, Berkeley, CA 94720, USA
- Kavli Energy NanoSciences Institute, Berkeley, CA 94720, USA
- Bakar Institute of Digital Materials for the Planet, Division of Computing, Data Science, and Society, University of California-Berkeley, Berkeley, CA 94720, USA
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2
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Korber JN, Wille C, Leutzsch M, Fürstner A. From the Glovebox to the Benchtop: Air-Stable High Performance Molybdenum Alkylidyne Catalysts for Alkyne Metathesis. J Am Chem Soc 2023; 145:26993-27009. [PMID: 38032858 PMCID: PMC10722517 DOI: 10.1021/jacs.3c10430] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/03/2023] [Accepted: 11/06/2023] [Indexed: 12/02/2023]
Abstract
Molybdenum alkylidynes endowed with tripodal silanolate ligands belong to the most active and selective catalysts for alkyne metathesis known to date. This paper describes a new generation that is distinguished by an unprecedented level of stability and practicality without sacrificing the chemical virtues of their predecessors. Specifically, pyridine adducts of type 16 are easy to make on gram scale, can be routinely weighed and handled in air, and stay intact for many months outside the glovebox. When dissolved in toluene, however, spontaneous dissociation of the stabilizing pyridine ligand releases an active species of excellent performance and functional group tolerance. Specifically, a host of polar and apolar groups, various protic sites, and numerous basic functionalities proved compatible. The catalysts are characterized by crystallographic and spectroscopic means, including 95Mo NMR; their activity and stability are benchmarked in detail, and the enabling properties are illustrated by advanced applications to natural product synthesis. For the favorable overall application profile and ease of handling, complexes of this new series are expected to replace earlier catalyst generations and help encourage a more regular use of alkyne metathesis in general.
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Affiliation(s)
- J. Nepomuk Korber
- Max-Planck-Institut
für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Christian Wille
- Max-Planck-Institut
für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Markus Leutzsch
- Max-Planck-Institut
für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Alois Fürstner
- Max-Planck-Institut
für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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3
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Hardouin C, Baillard S, Barière F, Copin C, Craquelin A, Janvier S, Lemaitre S, Le Roux S, Russo O, Samson S. Multikilogram Synthesis of a Potent Dual Bcl-2/Bcl-xL Antagonist. 1. Manufacture of the Acid Moiety and Development of Some Key Reactions. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00364] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Christophe Hardouin
- Industrial Research Centre, Oril Industrie, 13 rue Desgenétais, 76210 Bolbec, France
| | - Sandrine Baillard
- Industrial Research Centre, Oril Industrie, 13 rue Desgenétais, 76210 Bolbec, France
| | - François Barière
- Industrial Research Centre, Oril Industrie, 13 rue Desgenétais, 76210 Bolbec, France
| | - Chloé Copin
- Industrial Research Centre, Oril Industrie, 13 rue Desgenétais, 76210 Bolbec, France
| | - Anthony Craquelin
- Industrial Research Centre, Oril Industrie, 13 rue Desgenétais, 76210 Bolbec, France
| | - Solenn Janvier
- Industrial Research Centre, Oril Industrie, 13 rue Desgenétais, 76210 Bolbec, France
| | - Sylvain Lemaitre
- Industrial Research Centre, Oril Industrie, 13 rue Desgenétais, 76210 Bolbec, France
| | - Stéphane Le Roux
- Industrial Research Centre, Oril Industrie, 13 rue Desgenétais, 76210 Bolbec, France
| | - Olivier Russo
- Industrial Research Centre, Oril Industrie, 13 rue Desgenétais, 76210 Bolbec, France
| | - Sébastien Samson
- Industrial Research Centre, Oril Industrie, 13 rue Desgenétais, 76210 Bolbec, France
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4
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Strelnikov AA, Androsov DV, Konev AS, Lukyanov DA, Khlebnikov AF, Povolotskiy AV, Yamanouchi K. Triaryl-substituted pyrrolo -p -phenylene-linked porphyrin-fullerene dyads: Expanding the structural diversity of photoactive materials. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.084] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Feng L, Lanfranchi DA, Cotos L, Cesar-Rodo E, Ehrhardt K, Goetz AA, Zimmermann H, Fenaille F, Blandin SA, Davioud-Charvet E. Synthesis of plasmodione metabolites and13C-enriched plasmodione as chemical tools for drug metabolism investigation. Org Biomol Chem 2018. [DOI: 10.1039/c8ob00227d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A 10-step synthesis of the antimalarial lead,13C18-enriched plasmodione, and of seven putative metabolites is described.
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6
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Halogen-Metal Exchange on Bromoheterocyclics with Substituents Containing an Acidic Proton via Formation of a Magnesium Intermediate. Molecules 2017; 22:molecules22111952. [PMID: 29137130 PMCID: PMC6150384 DOI: 10.3390/molecules22111952] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 11/02/2017] [Accepted: 11/09/2017] [Indexed: 11/17/2022] Open
Abstract
A selective and practical bromine–metal exchange on bromoheterocyclics bearing substituents with an acidic proton under non-cryogenic conditions was developed by a simple modification of an existing protocol. Our protocol of using a combination of i-PrMgCl and n-BuLi has not only solved the problem of intermolecular quenching that often occurred when using alkyl lithium alone as the reagent for halogen–lithium exchange, but also offered a highly selective method for performing bromo–metal exchange on dibrominated arene compounds through chelation effect.
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7
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Nicolle SM, Nortcliffe A, Bartrum HE, Lewis W, Hayes CJ, Moody CJ. C−H Insertion as a Key Step to Spiro-Oxetanes, Scaffolds for Drug Discovery. Chemistry 2017; 23:13623-13627. [DOI: 10.1002/chem.201703746] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Simon M. Nicolle
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Andrew Nortcliffe
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Hannah E. Bartrum
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - William Lewis
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Christopher J. Hayes
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Christopher J. Moody
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
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8
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Kiser PD, Zhang J, Badiee M, Kinoshita J, Peachey NS, Tochtrop GP, Palczewski K. Rational Tuning of Visual Cycle Modulator Pharmacodynamics. J Pharmacol Exp Ther 2017; 362:131-145. [PMID: 28476927 DOI: 10.1124/jpet.117.240721] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Accepted: 05/01/2017] [Indexed: 11/22/2022] Open
Abstract
Modulators of the visual cycle have been developed for treatment of various retinal disorders. These agents were designed to inhibit retinoid isomerase [retinal pigment epithelium-specific 65 kDa protein (RPE65)], the rate-limiting enzyme of the visual cycle, based on the idea that attenuation of visual pigment regeneration could reduce formation of toxic retinal conjugates. Of these agents, certain ones that contain primary amine groups can also reversibly form retinaldehyde Schiff base adducts, which contributes to their retinal protective activity. Direct inhibition of RPE65 as a therapeutic strategy is complicated by adverse effects resulting from slowed chromophore regeneration, whereas effective retinal sequestration can require high drug doses with potential off-target effects. We hypothesized that the RPE65-emixustat crystal structure could help guide the design of retinaldehyde-sequestering agents with varying degrees of RPE65 inhibitory activity. We found that addition of an isopropyl group to the central phenyl ring of emixustat and related compounds resulted in agents effectively lacking in vitro retinoid isomerase inhibitory activity, whereas substitution of the terminal 6-membered ring with branched moieties capable of stronger RPE65 interaction potentiated inhibition. The isopropyl derivative series produced discernible visual cycle suppression in vivo, albeit much less potently than compounds with a high affinity for the RPE65 active site. These agents were distributed into the retina and formed Schiff base adducts with retinaldehyde. Except for one compound [3-amino-1-(3-isopropyl-5-((2,6,6-trimethylcyclohex-1-en-1-yl)methoxy)phenyl)propan-1-ol (MB-007)], these agents conferred protection against retinal phototoxicity, suggesting that both direct RPE65 inhibition and retinal sequestration are mechanisms of potential therapeutic relevance.
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Affiliation(s)
- Philip D Kiser
- Department of Pharmacology, School of Medicine (P.D.K., J.Z., K.P.), Department of Chemistry (M.B., G.P.T.), Case Western Reserve University, Cleveland, Ohio; Research Service, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio (P.D.K., N.S.P.); Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio (J.K., N.S.P.); and Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio (N.S.P.)
| | - Jianye Zhang
- Department of Pharmacology, School of Medicine (P.D.K., J.Z., K.P.), Department of Chemistry (M.B., G.P.T.), Case Western Reserve University, Cleveland, Ohio; Research Service, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio (P.D.K., N.S.P.); Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio (J.K., N.S.P.); and Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio (N.S.P.)
| | - Mohsen Badiee
- Department of Pharmacology, School of Medicine (P.D.K., J.Z., K.P.), Department of Chemistry (M.B., G.P.T.), Case Western Reserve University, Cleveland, Ohio; Research Service, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio (P.D.K., N.S.P.); Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio (J.K., N.S.P.); and Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio (N.S.P.)
| | - Junzo Kinoshita
- Department of Pharmacology, School of Medicine (P.D.K., J.Z., K.P.), Department of Chemistry (M.B., G.P.T.), Case Western Reserve University, Cleveland, Ohio; Research Service, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio (P.D.K., N.S.P.); Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio (J.K., N.S.P.); and Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio (N.S.P.)
| | - Neal S Peachey
- Department of Pharmacology, School of Medicine (P.D.K., J.Z., K.P.), Department of Chemistry (M.B., G.P.T.), Case Western Reserve University, Cleveland, Ohio; Research Service, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio (P.D.K., N.S.P.); Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio (J.K., N.S.P.); and Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio (N.S.P.)
| | - Gregory P Tochtrop
- Department of Pharmacology, School of Medicine (P.D.K., J.Z., K.P.), Department of Chemistry (M.B., G.P.T.), Case Western Reserve University, Cleveland, Ohio; Research Service, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio (P.D.K., N.S.P.); Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio (J.K., N.S.P.); and Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio (N.S.P.)
| | - Krzysztof Palczewski
- Department of Pharmacology, School of Medicine (P.D.K., J.Z., K.P.), Department of Chemistry (M.B., G.P.T.), Case Western Reserve University, Cleveland, Ohio; Research Service, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio (P.D.K., N.S.P.); Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio (J.K., N.S.P.); and Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio (N.S.P.)
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9
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Link A, Fischer C, Sparr C. Direkte Umwandlung von Estern in Arene mit 1,5-difunktionellen Organomagnesium-Reagentien. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505414] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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10
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Link A, Fischer C, Sparr C. Direct Transformation of Esters into Arenes with 1,5-Bifunctional Organomagnesium Reagents. Angew Chem Int Ed Engl 2015; 54:12163-6. [DOI: 10.1002/anie.201505414] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Indexed: 11/12/2022]
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11
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Xue F, He GJ, Li CG, Zhu Y, Lou TJ. A Practical and Scalable Process for the Preparation of 4-Aminophenylboronic Acid Pinacol Ester. HETEROCYCLES 2014. [DOI: 10.3987/com-14-13098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Tilly D, Chevallier F, Mongin F, Gros PC. Bimetallic Combinations for Dehalogenative Metalation Involving Organic Compounds. Chem Rev 2013; 114:1207-57. [DOI: 10.1021/cr400367p] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- David Tilly
- Equipe
Chimie et Photonique Moléculaires, Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS-Université de Rennes 1, Bâtiment
10A, Case 1003, Campus de Beaulieu, Avenue du Général
Leclerc, 35042 Rennes Cédex, France
| | - Floris Chevallier
- Equipe
Chimie et Photonique Moléculaires, Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS-Université de Rennes 1, Bâtiment
10A, Case 1003, Campus de Beaulieu, Avenue du Général
Leclerc, 35042 Rennes Cédex, France
| | - Florence Mongin
- Equipe
Chimie et Photonique Moléculaires, Institut des Sciences Chimiques
de Rennes, UMR 6226 CNRS-Université de Rennes 1, Bâtiment
10A, Case 1003, Campus de Beaulieu, Avenue du Général
Leclerc, 35042 Rennes Cédex, France
| | - Philippe C. Gros
- HECRIN, Université de Lorraine, SRSMC UMR 7565, Boulevard
des Aiguillettes, 54506 Vandoeuvre-lès-Nancy, France
- HECRIN, CNRS, SRSMC UMR 7565, Boulevard des Aiguillettes, 54506 Vandoeuvre-lès-Nancy, France
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13
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Mongin F, Harrison-Marchand A. Mixed AggregAte (MAA): A Single Concept for All Dipolar Organometallic Aggregates. 2. Syntheses and Reactivities of Homo/HeteroMAAs. Chem Rev 2013; 113:7563-727. [DOI: 10.1021/cr3002966] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Florence Mongin
- Equipe Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Bât. 10A, Case 1003, Campus de Beaulieu, Avenue du Général Leclerc, 35042 Rennes Cédex, France
| | - Anne Harrison-Marchand
- Laboratoire COBRA de l′Université de Rouen, INSA de Rouen, CNRS, UMR 6014 & FR 3038, IRCOF, Rue Tesnière, 76821 Mont St Aignan Cédex, France
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14
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A new synthetic approach for functional triisopropoxyorganosilanes using molecular building blocks. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.130] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Tian Q, Cheng Z, Yajima HM, Savage SJ, Green KL, Humphries T, Reynolds ME, Babu S, Gosselin F, Askin D, Kurimoto I, Hirata N, Iwasaki M, Shimasaki Y, Miki T. A Practical Synthesis of a PI3K Inhibitor under Noncryogenic Conditions via Functionalization of a Lithium Triarylmagnesiate Intermediate. Org Process Res Dev 2013. [DOI: 10.1021/op3002992] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Qingping Tian
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Zhigang Cheng
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Herbert M. Yajima
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Scott J. Savage
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Keena L. Green
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Theresa Humphries
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Mark E. Reynolds
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Srinivasan Babu
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Francis Gosselin
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - David Askin
- Small Molecule Process Chemistry, Genentech,
Inc.,
1 DNA Way, South San Francisco, California 94080, United States
| | - Isao Kurimoto
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 3 Utajima, Nishiyodogawa-ku, Osaka 555-0021, Japan
| | - Norihiko Hirata
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 3 Utajima, Nishiyodogawa-ku, Osaka 555-0021, Japan
| | - Mitsuhiro Iwasaki
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 3 Utajima, Nishiyodogawa-ku, Osaka 555-0021, Japan
| | - Yasuharu Shimasaki
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 3 Utajima, Nishiyodogawa-ku, Osaka 555-0021, Japan
| | - Takashi Miki
- Health & Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., 3 Utajima, Nishiyodogawa-ku, Osaka 555-0021, Japan
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16
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Hawkins JM, Dubé P, Maloney MT, Wei L, Ewing M, Chesnut SM, Denette JR, Lillie BM, Vaidyanathan R. Synthesis of an H3 Antagonist via Sequential One-Pot Additions of a Magnesium Ate Complex and an Amine to a 1,4-Ketoester followed by Carbonyl-Directed Fluoride Addition. Org Process Res Dev 2012. [DOI: 10.1021/op300093j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joel M. Hawkins
- Pharmaceutical Sciences, Pfizer Inc., Eastern Point Road, Groton, Connecticut
06340, United States
| | - Pascal Dubé
- Pharmaceutical Sciences, Pfizer Inc., Eastern Point Road, Groton, Connecticut
06340, United States
| | - Mark T. Maloney
- Pharmaceutical Sciences, Pfizer Inc., Eastern Point Road, Groton, Connecticut
06340, United States
| | - Lulin Wei
- Pharmaceutical Sciences, Pfizer Inc., Eastern Point Road, Groton, Connecticut
06340, United States
| | - Marcus Ewing
- Pharmaceutical Sciences, Pfizer Inc., Eastern Point Road, Groton, Connecticut
06340, United States
| | - Stephen M. Chesnut
- Pharmaceutical Sciences, Pfizer Inc., Eastern Point Road, Groton, Connecticut
06340, United States
| | - Joshua R. Denette
- Pharmaceutical Sciences, Pfizer Inc., Eastern Point Road, Groton, Connecticut
06340, United States
| | - Brett M. Lillie
- Pharmaceutical Sciences, Pfizer Inc., Eastern Point Road, Groton, Connecticut
06340, United States
| | - Rajappa Vaidyanathan
- Pharmaceutical Sciences, Pfizer Inc., Eastern Point Road, Groton, Connecticut
06340, United States
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17
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Bonnafoux L, Leroux FR, Colobert F. Bromine-lithium exchange: An efficient tool in the modular construction of biaryl ligands. Beilstein J Org Chem 2011; 7:1278-87. [PMID: 21977212 PMCID: PMC3182437 DOI: 10.3762/bjoc.7.148] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Accepted: 08/22/2011] [Indexed: 11/23/2022] Open
Abstract
Regioselective bromine–lithium exchange reactions on polybrominated biaryls enable the modular synthesis of various polysubstituted biphenyls such as bis(dialkylphosphino)-, bis(diarylphosphino)- and dialkyl(diaryl)phosphinobiphenyls. All permutations of substituents at the ortho positions of the biphenyls are possible. In a similar manner, one can gain access to monophosphine analogues. So far, such a process, based on the effective discrimination between bromine atoms as a function of their chemical environment, has been observed only sporadically.
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Affiliation(s)
- Laurence Bonnafoux
- Laboratoire de stéréochimie, UMR 7509, CNRS-Université de Strasbourg, ECPM, 25 rue Becquerel, F-67087 Strasbourg Cedex 02, France
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18
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Ehlers I, Maity P, Aubé J, König B. Modular Synthesis of Triazole-Containing Triaryl α-Helix Mimetics. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001531] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Bret G, Harling SJ, Herbal K, Langlade N, Loft M, Negus A, Sanganee M, Shanahan S, Strachan JB, Turner PG, Whiting MP. Development of the Route of Manufacture of an Oral H1−H3 Antagonist. Org Process Res Dev 2010. [DOI: 10.1021/op1002598] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guillaume Bret
- Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K., and Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Old Powder Mills, Leigh, nr Tonbridge TN11 9AN, U.K
| | - Sandra J. Harling
- Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K., and Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Old Powder Mills, Leigh, nr Tonbridge TN11 9AN, U.K
| | - Karim Herbal
- Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K., and Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Old Powder Mills, Leigh, nr Tonbridge TN11 9AN, U.K
| | - Nathalie Langlade
- Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K., and Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Old Powder Mills, Leigh, nr Tonbridge TN11 9AN, U.K
| | - Mike Loft
- Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K., and Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Old Powder Mills, Leigh, nr Tonbridge TN11 9AN, U.K
| | - Alan Negus
- Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K., and Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Old Powder Mills, Leigh, nr Tonbridge TN11 9AN, U.K
| | - Mahesh Sanganee
- Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K., and Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Old Powder Mills, Leigh, nr Tonbridge TN11 9AN, U.K
| | - Steve Shanahan
- Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K., and Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Old Powder Mills, Leigh, nr Tonbridge TN11 9AN, U.K
| | - John B. Strachan
- Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K., and Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Old Powder Mills, Leigh, nr Tonbridge TN11 9AN, U.K
| | - Peter G. Turner
- Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K., and Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Old Powder Mills, Leigh, nr Tonbridge TN11 9AN, U.K
| | - Matthew P. Whiting
- Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K., and Synthetic Chemistry, GlaxoSmithKline Pharmaceuticals, Old Powder Mills, Leigh, nr Tonbridge TN11 9AN, U.K
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