1
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Herrera D, Peral D, Bayón JC. Preparation of carboxylic arylphosphines by hydrolysis of the trifluoromethyl group. RSC Adv 2022; 12:7103-7114. [PMID: 35424709 PMCID: PMC8982155 DOI: 10.1039/d2ra00420h] [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] [Received: 01/20/2022] [Accepted: 02/24/2022] [Indexed: 11/21/2022] Open
Abstract
Triarylphosphines substituted with carboxylic and trifluoromethlyl groups have been prepared by the hydrolysis of trifluoromethyl groups using fuming sulfuric acid and boric acid. The reaction has been studied in a set of homoleptic and heteroleptic trifluoromethylated triarylphosphines and offers a new synthetic procedure for the preparation of carboxylic phosphines with a relatively simple methodology. The degree of carboxylation is modulated by the reaction conditions and is sensitive to the substitution pattern of the starting trifluoromethylated phosphines. A pH-dependent procedure based on the amphiphilic character of these phosphines was developed for their separation and purification. The electronic properties of the synthesized carboxylic-trifluoromethylated phosphines have been analyzed by 31P NMR of the corresponding selenide derivatives. Finally, the structures of two palladium complexes, containing the para and meta carboxylic-trifluoromethylated phosphines are also described, showing different dimeric structures.
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Affiliation(s)
- Daniel Herrera
- Department of Chemistry, Universitat Autònoma de Barcelona 08193 Cerdanyola del Vallés Spain
| | - Daniel Peral
- Department of Chemistry, Universitat Autònoma de Barcelona 08193 Cerdanyola del Vallés Spain
| | - J Carles Bayón
- Department of Chemistry, Universitat Autònoma de Barcelona 08193 Cerdanyola del Vallés Spain
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2
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Herrera D, Peral D, Cordón M, Bayón JC. Systematic Study of the Stereoelectronic Properties of Trifluoromethylated Triarylphosphines and the Correlation of their Behaviour as Ligands in the Rh‐Catalysed Hydroformylation. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000887] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Daniel Herrera
- Department of Chemistry Universitat Autònoma de Barcelona Building C Faculty of Sciences 08193 Cerdanyola del Vallés Spain
| | - Daniel Peral
- Department of Chemistry Universitat Autònoma de Barcelona Building C Faculty of Sciences 08193 Cerdanyola del Vallés Spain
| | - Mercedes Cordón
- Department of Chemistry Universitat Autònoma de Barcelona Building C Faculty of Sciences 08193 Cerdanyola del Vallés Spain
| | - J. Carles Bayón
- Department of Chemistry Universitat Autònoma de Barcelona Building C Faculty of Sciences 08193 Cerdanyola del Vallés Spain
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3
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Qin Y, Han J, Ju C, Zhao D. Ring Expansion to 6‐, 7‐, and 8‐Membered Benzosilacycles through Strain‐Release Silicon‐Based Cross‐Coupling. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ying Qin
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
| | - Jie‐Lian Han
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
| | - Cheng‐Wei Ju
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
| | - Dongbing Zhao
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
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4
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Qin Y, Han J, Ju C, Zhao D. Ring Expansion to 6‐, 7‐, and 8‐Membered Benzosilacycles through Strain‐Release Silicon‐Based Cross‐Coupling. Angew Chem Int Ed Engl 2020; 59:8481-8485. [DOI: 10.1002/anie.202001539] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Indexed: 12/25/2022]
Affiliation(s)
- Ying Qin
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
| | - Jie‐Lian Han
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
| | - Cheng‐Wei Ju
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
| | - Dongbing Zhao
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
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5
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Ma X, Zhao H, Binayeva M, Ralph G, Diane M, Zhao S, Wang CY, Biscoe MR. A General Approach to Stereospecific Cross-Coupling Reactions of Nitrogen-Containing Stereocenters. Chem 2020; 6:781-791. [PMID: 32440572 DOI: 10.1016/j.chempr.2020.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel strategy employing cyclohexyl spectator ligands in Stille cross-coupling reactions has been developed as a general solution to the long-standing challenge of conducting stereospecific cross-coupling reactions at nitrogen-containing stereocenters. This method enables direct access to enantioenriched products that are difficult (or impossible) to obtain via alternative preparative methods. Selective and predictable transfer of a single secondary alkyl unit can be achieved under reaction conditions that exploit subtle electronic differences between activated and unactivated alkyl units. Through this approach, enantioenriched α-stannylated nitrogen-containing stereocenters undergo Pd-catalyzed arylation and acylation reactions with exceptionally high stereofidelity in all instances investigated. We demonstrate this process by using α-stannylated pyrrolidine, azetidine, and open-chain (benzylic and non-benzylic) nucleophiles in stereospecific reactions. This process will facilitate rapid and reliable access to enantioenriched compounds possessing nitrogen-substituted stereocenters, which constitute ubiquitous structural motifs in biologically active compounds emerging from the drug-discovery process.
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Affiliation(s)
- Xinghua Ma
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Haoran Zhao
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Meruyert Binayeva
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Glenn Ralph
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Mohamed Diane
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Shibin Zhao
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Chao-Yuan Wang
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA
| | - Mark R Biscoe
- Department of Chemistry & Biochemistry, The City College of New York, 160 Convent Ave., New York, NY 10031, USA.,PhD Program in Chemistry, Graduate Center of the City University of New York, 365 Fifth Ave., New York, NY 10016, USA.,Lead Contact
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6
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Han JL, Qin Y, Zhao D. C(sp3)–H Bond Arylation and Amidation of Si-Bound Methyl Group via Directing Group Strategy. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00771] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jie-Lian Han
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Ying Qin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Dongbing Zhao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
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7
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Peral D, Herrera D, Real J, Flor T, Bayón JC. Strong π-acceptor sulfonated phosphines in biphasic rhodium-catalyzed hydroformylation of polar alkenes. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01004g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Trifluoromethylated and sulfonated triarylphosphines are remarkably resistant toward oxidation and very active for the biphasic hydroformylation of polar alkenes.
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Affiliation(s)
- Daniel Peral
- Departament de Química
- Universitat Autònoma de Barcelona
- Barcelona 08193
- Spain
| | - Daniel Herrera
- Departament de Química
- Universitat Autònoma de Barcelona
- Barcelona 08193
- Spain
| | - Julio Real
- Departament de Química
- Universitat Autònoma de Barcelona
- Barcelona 08193
- Spain
| | - Teresa Flor
- Departament de Química
- Universitat Autònoma de Barcelona
- Barcelona 08193
- Spain
| | - J. Carles Bayón
- Departament de Química
- Universitat Autònoma de Barcelona
- Barcelona 08193
- Spain
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8
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Cherney AH, Kadunce NT, Reisman SE. Enantioselective and Enantiospecific Transition-Metal-Catalyzed Cross-Coupling Reactions of Organometallic Reagents To Construct C-C Bonds. Chem Rev 2015; 115:9587-652. [PMID: 26268813 PMCID: PMC4566132 DOI: 10.1021/acs.chemrev.5b00162] [Citation(s) in RCA: 612] [Impact Index Per Article: 68.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Alan H Cherney
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Nathaniel T Kadunce
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Sarah E Reisman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
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9
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Srivastav N, Singh R, Kaur V. Carbastannatranes: a powerful coupling mediators in Stille coupling. RSC Adv 2015. [DOI: 10.1039/c5ra09960a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Carbastannatranes are better coupling mediators in Stille coupling due to easy transfer of axial Sn-bound hydrocarbyl substituent during transmetallation step.
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Affiliation(s)
- Neha Srivastav
- Department of Chemistry
- Panjab University
- Chandigarh-160014
- India
| | - Raghubir Singh
- Department of Chemistry
- D.A.V. College
- Chandigarh-160010
- India
| | - Varinder Kaur
- Department of Chemistry
- Panjab University
- Chandigarh-160014
- India
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10
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Cheng J, Zhou X, Xiang H. Fluorescent metal ion chemosensors via cation exchange reactions of complexes, quantum dots, and metal–organic frameworks. Analyst 2015; 140:7082-115. [DOI: 10.1039/c5an01398d] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Overview of a new paradigm in the design of fluorescent chemosensors for detecting metal ions via cation exchange reactions of complexes, quantum dots, and metal–organic frameworks.
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Affiliation(s)
| | - Xiangge Zhou
- College of Chemistry
- Sichuan University
- Chengdu
- China
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11
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Cheng J, Ma X, Zhang Y, Liu J, Zhou X, Xiang H. Optical chemosensors based on transmetalation of salen-based Schiff base complexes. Inorg Chem 2014; 53:3210-9. [PMID: 24559169 DOI: 10.1021/ic5000815] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We report our systematic studies of novel, simple, selective, and sensitive optical (both colorimetric and fluorescent) chemosensors for detecting Al(3+) based on transmetalation reactions (metal displacement or exchange reactions) of a series of K(I), Ca(II), Zn(II), Cu(II), and Pt(II) complexes containing different ligands of salen-based Schiff bases. Both the chemical structure of the salen ligand and the identity of the central metal ion have a tremendous impact on the sensing performance, which is mainly determined by the stability constant of the complex. Moreover, the selectivities of the salen-complex-based chemosensors are much better than those of the corresponding free salen ligands because of the shielding function of the filled-in metal ion in the complex. Therefore, the present work potentially provides a new and simple way to design optical probes via complex-based transmetalation reactions.
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Affiliation(s)
- Jinghui Cheng
- College of Chemistry, Sichuan University , Chengdu 610041, China
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12
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Stereoretentive Pd-catalysed Stille cross-coupling reactions of secondary alkyl azastannatranes and aryl halides. Nat Chem 2013; 5:607-12. [PMID: 23787752 DOI: 10.1038/nchem.1652] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 04/11/2013] [Indexed: 12/23/2022]
Abstract
The development of transition metal-catalysed cross-coupling reactions has greatly influenced the manner in which the synthesis of complex organic molecules is approached. A wide variety of methods are now available for the formation of C(sp(2))-C(sp(2)) bonds, and more recent work has focused on the use of C(sp(3)) electrophiles and nucleophiles. The use of secondary and tertiary alkyl nucleophiles in cross-coupling reactions remains a challenge because of the propensity of these alkyl groups to isomerize under the reaction conditions. Here, we report the development of a general Pd-catalysed process for the stereoretentive cross-coupling of secondary alkyl azastannatrane nucleophiles with aryl chlorides, bromides, iodides and triflates. Coupling partners with a wide range of electronic characteristics are well tolerated. The reaction occurs with minimal isomerization of the secondary alkyltin nucleophile, and with retention of absolute configuration. This process constitutes the first general method to use secondary alkyltin reagents in cross-coupling reactions.
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13
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Takanami T. Functionalization of Porphyrins through C-C Bond Formation Reactions with Functional Group-Bearing Organometallic Reagents. HETEROCYCLES 2013. [DOI: 10.3987/rev-13-775] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Sugita N, Hayashi S, Hino F, Takanami T. Palladium-catalyzed Kumada Coupling Reaction of Bromoporphyrins with Silylmethyl Grignard Reagents: Preparation of Silylmethyl-substituted Porphyrins as a Multipurpose Synthon for Fabrication of Porphyrin Systems. J Org Chem 2012; 77:10488-97. [DOI: 10.1021/jo302122f] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Noriaki Sugita
- Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588,
Japan
| | - Satoshi Hayashi
- Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588,
Japan
| | - Fumio Hino
- Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588,
Japan
| | - Toshikatsu Takanami
- Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588,
Japan
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15
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16
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Huang C, Chernyak N, Dudnik AS, Gevorgyan V. The Pyridyldiisopropylsilyl Group: A Masked Functionality and Directing Group for Monoselective ortho-Acyloxylation and ortho-Halogenation Reactions of Arenes. Adv Synth Catal 2011; 353:10.1002/adsc.201000975. [PMID: 24363640 PMCID: PMC3866842 DOI: 10.1002/adsc.201000975] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A novel, easily removable and modifiable silicon-tethered pyridyldiisopropylsilyl directing group for C-H functionalizations of arenes has been developed. The installation of the pyridyldiisopropylsilyl group can efficiently be achieved via two complementary routes using easily available 2-(diisopropylsilyl)pyridine (5). The first strategy features a nucleophilic hydride substitution at the silicon atom in 5 with aryllithium reagents generated in situ from the corresponding aryl bromides or iodides. The second milder route exploits a highly efficient room-temperature rhodium(I)-catalyzed cross-coupling reaction between 5 and aryl iodides. The latter approach can be applied to the preparation of a wide range of pyridyldiisopropylsilyl-substituted arenes possessing a variety of functional groups, including those incompatible with organometallic reagents. The pyridyldiisopropylsilyl directing group allows for a highly efficient, regioselective palladium(II)-catalyzed mono-ortho-acyloxylation and ortho-halogenation of various aromatic compounds. Most impor-tantly, the silicon-tethered directing group in both acyloxylated and halogenated products can easily be removed or efficiently converted into an array of other valuable functionalities. These transformations include protio-, deuterio-, halo-, boro-, and alkynyldesilylations, as well as a conversion of the directing group into the hydroxy functionality. In addition, the construction of aryl-aryl bonds via the Hiyama-Denmark cross-coupling reaction is feasible for the acetoxylated products. Moreover, the ortho-halogenated pyridyldiisopropylsilylarenes, bearing both nucleophilic pyridyldiisopropylsilyl and electrophilic aryl halide moieties, represent synthetically attractive 1,2-ambiphiles. A unique reactivity of these ambiphiles has been demonstrated in efficient syntheses of arylenediyne and benzosilole derivatives, as well as in a facile generation of benzyne. In addition, preliminary mechanistic studies of the acyloxylation and halogenation reactions have been performed. A trinuclear palladacycle intermediate has been isolated from a stoichiometric reaction between diisopropyl-(phenyl)pyrid-2-ylsilane (3a) and palladium acetate. Furthermore, both C-H functionalization reactions exhibited equally high values of the intramolecular primary kinetic isotope effect (kH/kD = 6.7). Based on these observations, a general mechanism involving the formation of a palladacycle via a C-H activation process as the rate-determining step has been proposed.
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Affiliation(s)
- Chunhui Huang
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, USA
| | - Natalia Chernyak
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, USA
| | - Alexander S. Dudnik
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, USA
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, USA
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17
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Rousseau G, Breit B. Removable directing groups in organic synthesis and catalysis. Angew Chem Int Ed Engl 2011; 50:2450-94. [PMID: 21365719 DOI: 10.1002/anie.201006139] [Citation(s) in RCA: 462] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Indexed: 11/11/2022]
Abstract
Directing groups have been widely used in recent years to achieve control over all aspects of reaction selectivity in a wide range of transformations involving transition-metal catalysis and organometallic reagents. In cases when the existing functional group within a substrate is unsuited to achieve efficient intramolecular delivery of a reagent or catalyst, the specific introduction of an appropriately designed removable reagent-directing group can be a solution to this problem. In this Review we give an overview of the state of the art in this area, including the stoichiometric and catalytic use of directing groups.
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Affiliation(s)
- Géraldine Rousseau
- Institut für Organische Chemie und Biochemie, Freiburg Institute for Advanced Studies (FRIAS), Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg i. Brsg., Germany
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18
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Rousseau G, Breit B. Entfernbare dirigierende Gruppen in der organischen Synthese und Katalyse. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201006139] [Citation(s) in RCA: 151] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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García Ruano JL, Duce S, Alemán J, López-Cantarero J, Remuiñán MJ, Cid MB. The role of the sulfinyl group in the copper catalyzed benzyl reactions from 2-p-tolylsulfinylbenzylstannanes. J Sulphur Chem 2009. [DOI: 10.1080/17415990902998595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- José Luis García Ruano
- a Departamento de Química Orgánica, Facultad de Ciencias , Universidad Autónoma de Madrid Cantoblanco , 28049, Madrid, Spain
| | - Sara Duce
- a Departamento de Química Orgánica, Facultad de Ciencias , Universidad Autónoma de Madrid Cantoblanco , 28049, Madrid, Spain
| | - José Alemán
- a Departamento de Química Orgánica, Facultad de Ciencias , Universidad Autónoma de Madrid Cantoblanco , 28049, Madrid, Spain
| | - Jesús López-Cantarero
- a Departamento de Química Orgánica, Facultad de Ciencias , Universidad Autónoma de Madrid Cantoblanco , 28049, Madrid, Spain
| | - Modesto J. Remuiñán
- a Departamento de Química Orgánica, Facultad de Ciencias , Universidad Autónoma de Madrid Cantoblanco , 28049, Madrid, Spain
| | - M. Belén Cid
- a Departamento de Química Orgánica, Facultad de Ciencias , Universidad Autónoma de Madrid Cantoblanco , 28049, Madrid, Spain
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20
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Paley RS, Berry KE, Liu JM, Sanan TT. Diastereoselective Intramolecular Pinacol Couplings of Sulfinyl Iron(0) Diene Complexes. J Org Chem 2009; 74:1611-20. [DOI: 10.1021/jo802330x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert S. Paley
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Ave., Swarthmore, Pennsylvania 19081
| | - Katherine E. Berry
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Ave., Swarthmore, Pennsylvania 19081
| | - Jane M. Liu
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Ave., Swarthmore, Pennsylvania 19081
| | - Toby T. Sanan
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Ave., Swarthmore, Pennsylvania 19081
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21
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Shukla KH, DeShong P. Studies on the mechanism of allylic coupling reactions: a hammett analysis of the coupling of aryl silicate derivatives. J Org Chem 2008; 73:6283-91. [PMID: 18616321 DOI: 10.1021/jo8010254] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hammett analysis of the palladium-catalyzed allyl-aryl coupling reaction has demonstrated that the rate of the coupling reaction is enhanced by electron-withdrawing groups on the aryl siloxane. The positive slope of the Hammett plot indicated involvement of a charged transition state in which negative charge on the aryl ring is stabilized inductively. This result is consistent with either transmetalation or reductive elimination being the rate-determining step in the coupling process. Furthermore, the influence of ligand on the metal site has been assessed from competition studies as a function of ligand type, cone angle, and electronic effects. From the relative ratios of coupling products produced in the Hammett study, it is possible to gather insight into the role of the electronic as well as the steric effects of ligands on the mechanism of the coupling reaction.
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Affiliation(s)
- Krupa H Shukla
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
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22
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Spivey AC, Gripton CJG, Hannah JP, Tseng CC, de Fraine P, Parr NJ, Scicinski JJ. The development of a ‘safety-catch’ arylgermane for biaryl synthesis by palladium-catalysed germyl-stille cross-coupling. Appl Organomet Chem 2007. [DOI: 10.1002/aoc.1270] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Itami K, Yoshida JI. Multisubstituted Olefins: Platform Synthesis and Applications to Materials Science and Pharmaceutical Chemistry. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2006. [DOI: 10.1246/bcsj.79.811] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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24
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Itami K, Yoshida JI. Platform Synthesis: A Useful Strategy for Rapid and Systematic Generation of Molecular Diversity. Chemistry 2006; 12:3966-74. [PMID: 16380951 DOI: 10.1002/chem.200500958] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Emergence of library-based approaches have changed the way of developing new functional molecules in materials science and pharmaceutical science. Therefore, reliable methods for rapid and systematic generation of functional molecules are highly called for in this field. We herein describe our concept of "platform synthesis" as a useful strategy for generating molecular diversity. This simple yet powerful strategy realizes the synthesis of a number of interesting multifunctional molecules, such as multisubstituted olefins, in a programmable and diversity-oriented format. As well as applications to the synthesis of pharmaceutically important molecules, such as tamoxifen and CDP840, applications to materials science, which have led to the discovery of interesting fluorescent materials and properties, are also described.
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Affiliation(s)
- Kenichiro Itami
- Research Center for Materials Science, Nagoya University, Nagoya 464-8602, Japan.
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Kamei T, Itami K, Yoshida JI. Catalytic Carbometalation/Cross-Coupling Sequence across Alkynyl(2-pyridyl)silanes Leading to a Diversity-Oriented Synthesis of Tamoxifen-Type Tetrasubstituted Olefins. Adv Synth Catal 2004. [DOI: 10.1002/adsc.200404220] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Itami K, Terakawa K, Yoshida JI, Kajimoto O. The Carbon–Silicon Bond Cleavage of Organosilicon Compounds in Supercritical Water. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2004. [DOI: 10.1246/bcsj.77.2071] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Schildbach D, Arroyo M, Lehmen K, Martín-Barrios S, Sierra L, Villafañe F, Strohmann C. [(Piperidinomethyl)silylmethyl] Cyclopalladated Complexes: Their Synthesis, Reactivity, and Solid State Structures⊥. Organometallics 2004. [DOI: 10.1021/om040028+] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
The representative examples of beneficial effects of hydrophilic groups in aqueous organic reactions are described, including the Diels-Alder reactions, hetero Diels-Alder reactions, Claisen rearrangement, radical reactions, and transition metal-catalyzed reactions. Although the low solubility of organic molecules in water has been a bane in aqueous organic reactions, the incorporation of hydrophilic groups into the substrate structure can overcome the solubility problem and at the same time enhance the hydrophobic effect. In some cases, interesting micellar effects are observed because of the amphiphilic natures of such molecules. The emerging concept of "removable hydrophilic group," in which the solubility problems have been alleviated, yet the initial product can still be transformed into a variety of products with the removal of the hydrophilic groups, is also described.
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Affiliation(s)
- Kenichiro Itami
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Kyoto 606-8501, Japan
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Paley RS, Liu JM, Lichtenstein BR, Knoedler VL, Sanan TT, Adams DJ, Fernández J, Rablen PR. Simultaneous and stereoselective formation of planar and axial chiralities in enantiopure sulfinyl iron diene complexes. Org Lett 2003; 5:309-12. [PMID: 12556179 DOI: 10.1021/ol027306q] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Enantiopure (1Z,3E)-1-sulfinyl dienes bearing an o-dithianylphenyl group can be prepared and complexed with (bda)Fe(CO)(3) to afford the corresponding sulfinyl diene iron(0) tricarbonyl complexes. This diastereoselective complexation introduces planar and axial chirality simultaneously, with a high degree of facial selectivity as well as atropselectivity. Dynamic kinetic resolution is likely to be the origin of the atropselectivity.
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Affiliation(s)
- Robert S Paley
- Swarthmore College, Department of Chemistry, Swarthmore, Pennsylvania 19081, USA.
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Itami K, Kamei T, Mineno M, Yoshida JI. AgOAc-Catalyzed Aldehyde Allylation Using Allyldimethyl(2-pyridyl)silane. CHEM LETT 2002. [DOI: 10.1246/cl.2002.1084] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Itami K, Mineno M, Kamei T, Yoshida JI. A general and straightforward route toward diarylmethanes. Integrated cross-coupling reactions using (2-pyridyl)silylmethylstannane as an air-stable, storable, and versatile coupling platform. Org Lett 2002; 4:3635-8. [PMID: 12375906 DOI: 10.1021/ol026573t] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] Pharmacologically important diarylmethane structures have been prepared in a straightforward manner through sequentially integrated Pd-catalyzed cross-coupling reactions. (2-Pyridyl)silylmethylstannane was found to be an air-stable, storable, and versatile coupling platform in this synthetic strategy.
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Affiliation(s)
- Kenichiro Itami
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Kyoto 606-8501, Japan
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Affiliation(s)
- Jun-Ichi Yoshida
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Kyoto 606-8501, Japan.
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Itami K, Mitsudo K, Nokami T, Kamei T, Koike T, Yoshida JI. Pyridylsilyl group-driven cross-coupling reactions. J Organomet Chem 2002. [DOI: 10.1016/s0022-328x(02)01173-7] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Itami K, Mitsudo K, Nishino A, Yoshida JI. Metal-catalyzed hydrosilylation of alkenes and alkynes using dimethyl(pyridyl)silane. J Org Chem 2002; 67:2645-52. [PMID: 11950311 DOI: 10.1021/jo0163389] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metal-catalyzed hydrosilylation of alkenes and alkynes using dimethyl(pyridyl)silane is described. The hydrosilylation of alkenes using dimethyl(2-pyridyl)silane (2-PyMe(2)SiH) proceeded well in the presence of a catalytic amount of RhCl(PPh(3))(3) with virtually complete regioselectivity. By taking advantage of the phase tag property of the 2-PyMe(2)Si group, hydrosilylation products were isolated in greater than 95% purity by simple acid-base extraction. Strategic catalyst recovery was also demonstrated. The hydrosilylation of alkynes using 2-PyMe(2)SiH proceeded with a Pt(CH(2)=CHSiMe(2))(2)O/P(t-Bu)(3) catalyst to give alkenyldimethyl(2-pyridyl)silanes in good yield with high regioselectivity. A reactivity comparison of 2-PyMe(2)SiH with other related hydrosilanes (3-PyMe(2)SiH, 4-PyMe(2)SiH, and PhMe(2)SiH) was also performed. In the rhodium-catalyzed reaction, the reactivity order of hydrosilane was 2-PyMe(2)SiH >> 3-PyMe(2)SiH, 4-PyMe(2)SiH, PhMe(2)SiH, indicating a huge rate acceleration with 2-PyMe(2)SiH. In the platinum-catalyzed reaction, the reactivity order of hydrosilane was PhMe(2)SiH, 3-PyMe(2)SiH >> 4-PyMe(2)SiH > 2-PyMe(2)SiH, indicating a rate deceleration with 2-PyMe(2)SiH and 4-PyMe(2)SiH. It seems that these reactivity differences stem primarily from the governance of two different mechanisms (Chalk-Harrod and modified Chalk-Harrod mechanisms). From the observed reactivity order, coordination and electronic effects of dimethyl(pyridyl)silanes have been implicated.
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Affiliation(s)
- Kenichiro Itami
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Kyoto 606-8501, Japan
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Itami K, Nokami T, Ishimura Y, Mitsudo K, Kamei T, Yoshida J. Diversity-oriented synthesis of multisubstituted olefins through the sequential integration of palladium-catalyzed cross-coupling reactions. 2-pyridyldimethyl(vinyl)silane as a versatile platform for olefin synthesis. J Am Chem Soc 2001; 123:11577-85. [PMID: 11716711 DOI: 10.1021/ja016790+] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel strategy for the diversity-oriented synthesis of multisubstituted olefins, where 2-pyridyldimethyl(vinyl)silane functions as a versatile platform for olefin synthesis, is described. The palladium-catalyzed Heck-type coupling of 2-pyridyldimethyl(vinyl)silanes with organic iodides took place in the presence of Pd2(dba)3/tri-2-furylphosphine catalyst to give beta-substituted vinylsilanes in excellent yields. The Heck-type coupling occurred even with alpha- and beta-substituted 2-pyridyldimethyl(vinyl)silanes. The one-pot double Heck coupling of 2-pyridyldimethyl(vinyl)silane took place with two different aryl iodides to afford beta,beta-diarylated vinylsilanes in good yields. The palladium-catalyzed Hiyama-type coupling of 2-pyridyldimethyl(vinyl)silane with organic halides took place in the presence of tetrabutylammonium fluoride to give di- and trisubstituted olefins in high yields. The sequential integration of Heck-type (or double Heck) coupling and Hiyama-type coupling produced the multisubstituted olefins in regioselective, stereoselective, and diversity-oriented fashions. Especially, the one-pot sequential Heck/Hiyama coupling reaction provides an extremely facile entry into a diverse range of stereodefined multisubstituted olefins. Mechanistic considerations of both Heck-type and Hiyama-type coupling reactions are also described.
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Affiliation(s)
- K Itami
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Kyoto 606-8501, Japan
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