101
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Affiliation(s)
- Cátia Ornelas
- Institut des Sciences Moléculaires, UMR CNRS No. 5255, Université Bordeaux 1, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Jaime Ruiz
- Institut des Sciences Moléculaires, UMR CNRS No. 5255, Université Bordeaux 1, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Didier Astruc
- Institut des Sciences Moléculaires, UMR CNRS No. 5255, Université Bordeaux 1, 351 Cours de la Libération, 33405 Talence Cedex, France
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102
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Angurell I, Rossell O, Seco M. Synthesis of Carbosilane Dendrimers Containing up to Four Metal Layers. Chemistry 2009; 15:2932-40. [DOI: 10.1002/chem.200802479] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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103
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Bergbreiter DE, Tian J, Hongfa C. Using Soluble Polymer Supports To Facilitate Homogeneous Catalysis. Chem Rev 2009; 109:530-82. [DOI: 10.1021/cr8004235] [Citation(s) in RCA: 314] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- David E. Bergbreiter
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Jianhua Tian
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Chayanant Hongfa
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
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104
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Astruc D. Electron-reservoir complexes and other redox-robust reagents: functions and applications. NEW J CHEM 2009. [DOI: 10.1039/b903188j] [Citation(s) in RCA: 40] [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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105
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106
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Fujihara T, Yoshida S, Ohta H, Tsuji Y. Triarylphosphanes with Dendritically Arranged Tetraethylene Glycol Moieties at the Periphery: An Efficient Ligand for the Palladium-Catalyzed Suzuki-Miyaura Coupling Reaction. Angew Chem Int Ed Engl 2008; 47:8310-4. [DOI: 10.1002/anie.200802683] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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107
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Fujihara T, Yoshida S, Ohta H, Tsuji Y. Triarylphosphanes with Dendritically Arranged Tetraethylene Glycol Moieties at the Periphery: An Efficient Ligand for the Palladium-Catalyzed Suzuki-Miyaura Coupling Reaction. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200802683] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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108
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Feng X, Taton D, Ibarboure E, Chaikof EL, Gnanou Y. Janus-type dendrimer-like poly(ethylene oxide)s. J Am Chem Soc 2008; 130:11662-76. [PMID: 18681431 PMCID: PMC2723772 DOI: 10.1021/ja7103119] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A straightforward and original methodology allowing the synthesis of Janus-type dendrimer-like poly(ethylene oxide)s (PEOs) carrying orthogonal functional groups on their surface is described. The use of 3-allyloxy-1,2-propanediol (1) as a latent AB2-type heterofunctional initiator of anionic ring-opening polymerization (AROP) of ethylene oxide (EO) and of selective branching agents of PEO chain ends served to construct the two dendrons of these dendrimer-like PEOs, following a divergent pathway. Thus, the first PEO generation of the first dendron was grown by AROP from 1 followed by the reaction of the corresponding alpha-allyl,omega,omega'-bishydroxy- heterofunctional PEO derivative with 2-(3'-chloromethybenzyloxymethyl)-2-methyl-5,5-dimethyl-1,3-dioxane (2) used as a branching agent. This afforded the dendron A with four latent peripheral hydroxyls protected in the form of two ketal rings. The remaining alpha-allylic double bond of the PEO thus prepared was transformed into two hydroxyl groups using OsO4 in order to create the first PEO generation of the dendron B by AROP of EO. Allyl chloride (3) was then used as another (latent) branching agent to react with the terminal hydroxyl of the corresponding PEO chains. Deprotection under acidic conditions of the ketal groups of dendron A, followed by AROP of EO, afforded the second PEO generation on this face. This alternate and divergent procedure, combining AROP of EO and selective branching of PEO branches, could be readily iterated, one dendron after the other up to the generation six, leading to a Janus-type dendrimer-like PEO exhibiting a total mass of around 300 kg/mol and possessing 64 peripheral groups on each face. The possibility of orthogonal functionalization of the surfaces of such Janus-type dendritic PEOs was exploited. Indeed, a dendron of generation 4 was functionalized with hydroxyl functions at its periphery, whereas the other was end-capped with either tertiary amino or disulfide groups. In a variant of this strategy, azido groups and acetylene could also be orthogonally introduced at the periphery of the fourth generation Janus-type dendrimer-like PEO and subjected to polycondensation by a 1,3-dipolar cycloaddition reaction. This afforded a necklace-like covalent assembly of dendrimer-like PEOs through the formation of stable [1,2,3]-triazole linkages.
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Affiliation(s)
- Xiaoshuang Feng
- Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, ENSCPB 16, Avenue Pey Berland, 33607 Pessac cedex, France
| | - Daniel Taton
- Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, ENSCPB 16, Avenue Pey Berland, 33607 Pessac cedex, France
| | - Emmanuel Ibarboure
- Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, ENSCPB 16, Avenue Pey Berland, 33607 Pessac cedex, France
| | - Elliot L. Chaikof
- Laboratory for Biomolecular Materials Research, Department of Surgery, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Yves Gnanou
- Laboratoire de Chimie des Polymères Organiques, Université Bordeaux 1, ENSCPB 16, Avenue Pey Berland, 33607 Pessac cedex, France
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109
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Synthesis and aqueous solution properties of PAMAM dendron surfactants bearing a quaternary ammonium focal group and sugar terminal groups. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.05.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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110
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Agasti SS, Caldwell ST, Cooke G, Jordan BJ, Kennedy A, Kryvokhyzha N, Rabani G, Rana S, Sanyal A, Rotello VM. Dendron-based model systems for flavoenzyme activity: towards a new class of synthetic flavoenzyme. Chem Commun (Camb) 2008:4123-5. [PMID: 18802503 DOI: 10.1039/b809568j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three generations of water-soluble flavin dendrons have been synthesized and the role dendrimer generation has on the physical and catalytic properties of these assemblies has been investigated.
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Affiliation(s)
- Sarit S Agasti
- Department of Chemistry, University of Massachusetts at Amherst, Amherst, MA 01003, USA
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111
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Erathodiyil N, Ooi S, Seayad AM, Han Y, Lee SS, Ying JY. Palladium nanoclusters supported on propylurea-modified siliceous mesocellular foam for coupling and hydrogenation reactions. Chemistry 2008; 14:3118-25. [PMID: 18260070 DOI: 10.1002/chem.200701361] [Citation(s) in RCA: 106] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This paper describes the synthesis, characterization and applications of palladium (Pd) nanoparticles supported on siliceous mesocellular foam (MCF). Pd nanoparticles of 2-3 nm and 4-6 nm were used in reactions involving molecular hydrogen (such as hydrogenation of double bonds and reductive amination), transfer hydrogenation of ketones and epoxides, and coupling reactions (such as Heck and Suzuki reactions). They successfully catalyzed all these reactions with excellent yield and selectivity. This heterogeneous catalyst was easily recovered by filtration, and recycled several times without any significant loss in activity and selectivity. The palladium leaching in the reactions was determined to be much less than the FDA-approved limit of 5 ppm. Furthermore, the catalyst can be stored and handled under normal atmospheric conditions. This immobilized catalyst allows for ease of recovery/reuse and minimization of waste generation, which are of great interest in the development of green chemical processes.
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Affiliation(s)
- Nandanan Erathodiyil
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
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112
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Peng X, Pan Q, Rempel GL. Bimetallic dendrimer-encapsulated nanoparticles as catalysts: a review of the research advances. Chem Soc Rev 2008; 37:1619-28. [PMID: 18648686 PMCID: PMC2898642 DOI: 10.1039/b716441f] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bimetallic dendrimer-encapsulated nanoparticles (DENs) are important materials, because they have demonstrated improvement in performance compared to the monometallic DENs in many systems when they are used as catalysts. This tutorial review focuses on the recent research advances in bimetallic DENs with respect to their synthesis, characterization, and applications as catalysts. Bimetallic DENs can be made mainly via three routes: co-complexation, sequential loading, and partial displacement. The research in bimetallic DENs has been significantly promoted by the advancement of characterization instruments. The performances of bimetallic DENs as homogeneous and heterogeneous catalysts in organic synthesis have been compared with both monometallic DENs and their physical mixtures. It is concluded that the synergistic electronic effect in bimetallic nanoparticles enhances their catalytic activities.
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Affiliation(s)
- Xiaohong Peng
- Department of Polymer Science and Engineering, South China University of Technology, Guangzhou, PR China.
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113
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de Jesús E, Flores JC. Dendrimers: Solutions For Catalyst Separation and Recycling–A Review † Dedicated to the memory of Dr. José Antonio Delgado Oyagüe. Ind Eng Chem Res 2008. [DOI: 10.1021/ie800381d] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ernesto de Jesús
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Madrid, Spain
| | - Juan C. Flores
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Madrid, Spain
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114
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Palladium(II) complexes of phosphane ligands with ammonium-functionalized carbosilane substituents. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.03.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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115
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Lu SM, Alper H. Sequence of intramolecular carbonylation and asymmetric hydrogenation reactions: highly regio- and enantioselective synthesis of medium ring tricyclic lactams. J Am Chem Soc 2008; 130:6451-5. [PMID: 18444651 DOI: 10.1021/ja7111417] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The intramolecular cyclocarbonylation reaction with palladium-complexed dendrimers on silica is a very effective method for the regioselective synthesis of methylene 8-, 9-, and 10-membered rings. The heterogeneous dendritic catalysts are easily recovered by simple filtration and reused for up to 10 cycles with only a slight loss of activity. Asymmetric hydrogenation of the resulting unsaturated heterocycles affords optically active tricyclic lactams in excellent yields and in high enantiomeric excess. This process can tolerate a wide array of functional groups, including halide, ether, nitrile, ketone, and ester. Moreover, the variation of heteroatom on the rings does not have any influence on the efficiency and enantioselectivity of the reaction.
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Affiliation(s)
- Shui-Ming Lu
- Centre for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
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116
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Servin P, Laurent R, Romerosa A, Peruzzini M, Majoral JP, Caminade AM. Synthesis of Dendrimers Terminated by Bis(diphenylphosphinomethyl)amino Ligands and Use of Their Palladium Complexes for Catalyzing C−C Cross-Coupling Reactions. Organometallics 2008. [DOI: 10.1021/om800008p] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul Servin
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 4, France, Área de Química Inorgánica, Facultad de Ciencias Experimentales, Universidad de Almería, 04071 Almería, Spain, and ICCOM CNR, Istituto di Chimica dei Composti Organometallici, Via Madonna del Piano, 10 Polo Scientifico di Sesto Fiorentino, 50019 Sesto Fiorentino, Italy
| | - Régis Laurent
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 4, France, Área de Química Inorgánica, Facultad de Ciencias Experimentales, Universidad de Almería, 04071 Almería, Spain, and ICCOM CNR, Istituto di Chimica dei Composti Organometallici, Via Madonna del Piano, 10 Polo Scientifico di Sesto Fiorentino, 50019 Sesto Fiorentino, Italy
| | - Antonio Romerosa
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 4, France, Área de Química Inorgánica, Facultad de Ciencias Experimentales, Universidad de Almería, 04071 Almería, Spain, and ICCOM CNR, Istituto di Chimica dei Composti Organometallici, Via Madonna del Piano, 10 Polo Scientifico di Sesto Fiorentino, 50019 Sesto Fiorentino, Italy
| | - Maurizio Peruzzini
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 4, France, Área de Química Inorgánica, Facultad de Ciencias Experimentales, Universidad de Almería, 04071 Almería, Spain, and ICCOM CNR, Istituto di Chimica dei Composti Organometallici, Via Madonna del Piano, 10 Polo Scientifico di Sesto Fiorentino, 50019 Sesto Fiorentino, Italy
| | - Jean-Pierre Majoral
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 4, France, Área de Química Inorgánica, Facultad de Ciencias Experimentales, Universidad de Almería, 04071 Almería, Spain, and ICCOM CNR, Istituto di Chimica dei Composti Organometallici, Via Madonna del Piano, 10 Polo Scientifico di Sesto Fiorentino, 50019 Sesto Fiorentino, Italy
| | - Anne-Marie Caminade
- Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 4, France, Área de Química Inorgánica, Facultad de Ciencias Experimentales, Universidad de Almería, 04071 Almería, Spain, and ICCOM CNR, Istituto di Chimica dei Composti Organometallici, Via Madonna del Piano, 10 Polo Scientifico di Sesto Fiorentino, 50019 Sesto Fiorentino, Italy
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117
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Kühnert J, Lamač M, Demel J, Nicolai A, Lang H, Štěpnička P. Phosphinoferrocenyl-terminated amidoamines: Synthesis and catalytic utilization in palladium-mediated C–C bond forming reactions. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcata.2008.01.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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118
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Forrat VJ, Ramón DJ, Yus M. Toward the continuous-flow synthesis of chiral tertiary alcohols by enantioselective addition of organozinc reagents to ketones using nanosize isoborneol ligands. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.02.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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119
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120
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Roberts BP, Scanlon MJ, Krippner GY, Chalmers DK. The Dotted Cap Notation: A concise notation for describing variegated dendrimers. NEW J CHEM 2008. [DOI: 10.1039/b800724a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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121
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Park JH, Chung YK. Cobalt–rhodium heterobimetallic nanoparticle-catalyzed reactions. Dalton Trans 2008:2369-78. [DOI: 10.1039/b718609f] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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122
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Newkome GR, Shreiner CD. Poly(amidoamine), polypropylenimine, and related dendrimers and dendrons possessing different 1→2 branching motifs: An overview of the divergent procedures. POLYMER 2008. [DOI: 10.1016/j.polymer.2007.10.021] [Citation(s) in RCA: 313] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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123
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Synthesis of Hyperbranched Polymers with Rhenium(I) Bis(Stilbazoylimino)Acephthalene Complexes at the Branching Units. J Inorg Organomet Polym Mater 2007. [DOI: 10.1007/s10904-007-9187-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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124
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Sánchez-Méndez A, Ortiz AM, de Jesús E, Flores JC, Gómez-Sal P. Dendronized scorpionate complexes of molybdenum in low and high oxidation states. Dalton Trans 2007:5658-69. [DOI: 10.1039/b710125b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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