1
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Miyamura H, Suzuki A, Zhu Z, Kobayashi S. Hydrogen Generation from Organic Hydrides under Continuous-Flow Conditions Using Polymethylphenylsilane-Aluminum Immobilized Platinum Catalyst. Chem Asian J 2022; 17:e202200569. [PMID: 35841214 DOI: 10.1002/asia.202200569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/12/2022] [Indexed: 11/07/2022]
Abstract
Hydrogen is an important resource for realizing the goal of a hydrogen-based society as well as for synthetic organic chemistry. Catalytic dehydrogenation of organic hydrides such as methyl cyclohexane is attractive for hydrogen storage and transportation in terms of reversibility and selectivity of catalytic reactions and hydrogen storage density. We developed a highly active polymethylphenylsilane-aluminum immobilized platinum catalyst (Pt/MPPSi-Al2O3) for dehydrogenation of organic hydrides. Organic hydrides were fully converted into the corresponding aromatic compounds under reactive distillation conditions at 200 °C or under circulation-flow conditions using the Pt/MPPSi-Al2O3 catalyst packed in a column at 260 °C. The dehydrogenation reaction reached a maximum conversion at equilibrium (ca. 60%) under continuous-flow conditions at 260 °C. This catalytic continuous-flow dehydrogenation was applied to a formal hydrogen transfer from organic hydrides to unsaturated organic substrates under sequential and continuous-flow conditions for practical flow hydrogenation reactions by connecting two different heterogeneous catalysts packed in columns.
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Affiliation(s)
- Hiroyuki Miyamura
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Aya Suzuki
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Zhiyuan Zhu
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Shū Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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2
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Miyamura H, Kobayashi S. Reaction Rate Acceleration of Cooperative Catalytic Systems: Metal Nanoparticles and Lewis Acids in Arene Hydrogenation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hiroyuki Miyamura
- The University of Tokyo: Tokyo Daigaku Department of Chemistry JAPAN
| | - Shu Kobayashi
- The University of Tokyo Department of Chemistry, School of Science 7-3-1 Hongo, Bunkyo-ku 113-0033 Tokyo JAPAN
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3
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Miyamura H, Kobayashi S. Reaction Rate Acceleration of Cooperative Catalytic Systems: Metal Nanoparticles and Lewis Acids in Arene Hydrogenation. Angew Chem Int Ed Engl 2022; 61:e202201203. [PMID: 35358361 DOI: 10.1002/anie.202201203] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Indexed: 11/07/2022]
Abstract
Employing two distinct catalysts in one reaction medium synergistically is a powerful strategy for activating less reactive substrates. Although the approach has been well-developed in homogeneous conditions, it remains challenging and rare in heterogeneous catalysis, especially under gas-liquid-solid multiphase reaction conditions. Here, we describe the development of cooperative and synergistic catalyst systems of heterogeneous Rh-Pt bimetallic nanoparticle catalysts, Rh-Pt/DMPSi-Al2 O3 , and Sc(OTf)3 in the liquid phase for the hydrogenation of arenes under very mild conditions. Dramatic rate acceleration was achieved with cooperative activation. Remarkably, more challenging substrates that contained strong electron-donating groups and sterically hindered substituents were smoothly hydrogenated. Mechanistic insights into the cooperative activation of an aromatic substrate by heterogeneous metal nanoparticles and a soluble Lewis acid was obtained by kinetic studies and by direct observation of 1 H and 45 Sc NMR spectra.
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Affiliation(s)
- Hiroyuki Miyamura
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Shū Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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4
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Ishitani H, Furiya Y, Kobayashi S. Enantioselective Sequential-Flow Synthesis of Baclofen Precursor via Asymmetric 1,4-Addition and Chemoselective Hydrogenation on Platinum/Carbon/Calcium Phosphate Composites. Chem Asian J 2020; 15:1688-1691. [PMID: 32027466 DOI: 10.1002/asia.202000065] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Indexed: 01/09/2023]
Abstract
Continuous-flow synthesis of baclofen precursor (2) was achieved using achiral and chiral heterogeneous catalysts in high yield with high enantioselectivity. The key steps are chiral calcium-catalyzed asymmetric 1,4-addition of a malonate to a nitroalkene and chemoselective reduction of a nitro compound to the corresponding amino compound by using molecular hydrogen. A dimethylpolysilane (DMPS)-modified platinum catalyst supported on activated carbon (AC) and calcium phosphate (CP) has been developed that has remarkable activity for the selective hydrogenation of nitro compounds.
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Affiliation(s)
- Haruro Ishitani
- Green & Sustainable Chemistry Cooperation Laboratory, Graduate School of Science, The University of Tokyo Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yuichi Furiya
- Department of Chemistry, School of Science, The University of Tokyo Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Shu Kobayashi
- Green & Sustainable Chemistry Cooperation Laboratory, Graduate School of Science, The University of Tokyo Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,Department of Chemistry, School of Science, The University of Tokyo Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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5
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Miyamura H, Tobita F, Suzuki A, Kobayashi S. Polymer Immobilized Bimetallic Nanoparticle Catalysts for Selective Hydrogenation of Quinones and Integration of Quinone-hydrogenation and Its Derivatization Using Sequential and Continuous-flow Systems. J SYN ORG CHEM JPN 2020. [DOI: 10.5059/yukigoseikyokaishi.78.232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Ueno M, Miyoshi N, Hanada K, Kobayashi S. Three‐Component, One‐Pot Tandem Sonogashira/Suzuki‐Miyaura Coupling Reactions for the Synthesis of a Library of Ceramide‐Transport Protein Inhibitors Designed In Silico. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Masaharu Ueno
- Department of Chemistry School of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
- Department of Natural Science Graduate School of Advanced Technology and ScienceTokushima University 2-1 Minami-jousanjima Tokushima 770-8506 Japan
| | - Norikazu Miyoshi
- Department of Natural Science Graduate School of Advanced Technology and ScienceTokushima University 2-1 Minami-jousanjima Tokushima 770-8506 Japan
| | - Kentaro Hanada
- Department of Biochemistry & Cell BiologyNational Institute of Infectious Diseases 1-23-1 Toyama, Shinjuku-ku Tokyo 162-8640 Japan
| | - Shū Kobayashi
- Department of Chemistry School of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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7
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Miyamura H, Kobayashi S. Nanoparticle Catalysts in Flow Systems. TOP ORGANOMETAL CHEM 2020. [DOI: 10.1007/3418_2020_46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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Miyamura H, Yasukawa T, Zhu Z, Kobayashi S. Asymmetric 1,4‐Addition of Arylboronic Acids to β,γ‐Unsaturated α‐Ketoesters using Heterogeneous Chiral Metal Nanoparticle Systems. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901294] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hiroyuki Miyamura
- Department of Chemistry, School of ScienceThe University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Tomohiro Yasukawa
- Department of Chemistry, School of ScienceThe University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Zhiyuan Zhu
- Department of Chemistry, School of ScienceThe University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shū Kobayashi
- Department of Chemistry, School of ScienceThe University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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9
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Kumar DR, Panigrahy RS, Ravi Kishore D, Satyanarayana G. Copper‐Catalyzed Chemoselective 1,4‐Reductions: Sequential One‐Pot Synthesis of Esters. ChemistrySelect 2019. [DOI: 10.1002/slct.201902393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Devarapalli Ravi Kumar
- Department of ChemistryIndian Institute of Technology Hyderabad Kandi – 502 285, Sangareddy, Telangana INDIA
| | - Ram Sankar Panigrahy
- Department of ChemistryIndian Institute of Technology Hyderabad Kandi – 502 285, Sangareddy, Telangana INDIA
| | - Dakoju Ravi Kishore
- Department of ChemistryIndian Institute of Technology Hyderabad Kandi – 502 285, Sangareddy, Telangana INDIA
| | - Gedu Satyanarayana
- Department of ChemistryIndian Institute of Technology Hyderabad Kandi – 502 285, Sangareddy, Telangana INDIA
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10
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Miyamura H, Tobita F, Suzuki A, Kobayashi S. Direct Synthesis of Hydroquinones from Quinones through Sequential and Continuous‐Flow Hydrogenation‐Derivatization Using Heterogeneous Au–Pt Nanoparticles as Catalysts. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Hiroyuki Miyamura
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Fumiya Tobita
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Aya Suzuki
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shū Kobayashi
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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11
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Miyamura H, Tobita F, Suzuki A, Kobayashi S. Direct Synthesis of Hydroquinones from Quinones through Sequential and Continuous‐Flow Hydrogenation‐Derivatization Using Heterogeneous Au–Pt Nanoparticles as Catalysts. Angew Chem Int Ed Engl 2019; 58:9220-9224. [DOI: 10.1002/anie.201904159] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Hiroyuki Miyamura
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Fumiya Tobita
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Aya Suzuki
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shū Kobayashi
- Department of ChemistrySchool of ScienceThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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12
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Miyamura H, Suzuki A, Yasukawa T, Kobayashi S. Polysilane-Immobilized Rh-Pt Bimetallic Nanoparticles as Powerful Arene Hydrogenation Catalysts: Synthesis, Reactions under Batch and Flow Conditions and Reaction Mechanism. J Am Chem Soc 2018; 140:11325-11334. [PMID: 30080963 DOI: 10.1021/jacs.8b06015] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Hydrogenation of arenes is an important reaction not only for hydrogen storage and transport but also for the synthesis of functional molecules such as pharmaceuticals and biologically active compounds. Here, we describe the development of heterogeneous Rh-Pt bimetallic nanoparticle catalysts for the hydrogenation of arenes with inexpensive polysilane as support. The catalysts could be used in both batch and continuous-flow systems with high performance under mild conditions and showed wide substrate generality. In the continuous-flow system, the product could be obtained by simply passing the substrate and 1 atm H2 through a column packed with the catalyst. Remarkably, much higher catalytic performance was observed in the flow system than in the batch system, and extremely strong durability under continuous-flow conditions was demonstrated (>50 days continuous run; turnover number >3.4 × 105). Furthermore, details of the reaction mechanisms and the origin of different kinetics in batch and flow were studied, and the obtained knowledge was applied to develop completely selective arene hydrogenation of compounds containing two aromatic rings toward the synthesis of an active pharmaceutical ingredient.
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Affiliation(s)
- Hiroyuki Miyamura
- Department of Chemistry, School of Science , The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Aya Suzuki
- Department of Chemistry, School of Science , The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Tomohiro Yasukawa
- Department of Chemistry, School of Science , The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Shu Kobayashi
- Department of Chemistry, School of Science , The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033 , Japan
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13
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Selka A, Levesque NA, Foucher D, Clarisse O, Chemat F, Touaibia M. A Comparative Study of Solvent-Free and Highly Efficient Pinene Hydrogenation over Pd on Carbon, Alumina, and Silica Supports. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.6b00344] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ayyoub Selka
- Département
de Chimie et Biochimie, Université de Moncton, Moncton, New Brunswick, Canada
- Laboratoire
de Catalyse et Synthèse en Chimie Organique, Faculté
des Sciences, Université de Tlemcen, Tlemcen, Algeria
| | - Natalie A. Levesque
- Département
de Chimie et Biochimie, Université de Moncton, Moncton, New Brunswick, Canada
| | - Delphine Foucher
- Département
de Chimie et Biochimie, Université de Moncton, Moncton, New Brunswick, Canada
| | - Olivier Clarisse
- Département
de Chimie et Biochimie, Université de Moncton, Moncton, New Brunswick, Canada
| | - Farid Chemat
- INRA,
UMR408, GREEN Extraction Team, Université d’Avignon, F-84000 Avignon, France
| | - Mohamed Touaibia
- Département
de Chimie et Biochimie, Université de Moncton, Moncton, New Brunswick, Canada
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14
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Saito Y, Ishitani H, Kobayashi S. Catalytic Hydrogenation of Aliphatic Nitro Compounds with Polysilane/Bone Charcoal‐Supported Palladium Catalysts under Continuous‐Flow Conditions. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600279] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Yuki Saito
- Department of chemistry, School of Science The University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Haruro Ishitani
- Green & Sustainable Chemistry Cooperation Laboratory Graduate School of Science The University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shū Kobayashi
- Department of chemistry, School of Science The University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033 Japan
- Green & Sustainable Chemistry Cooperation Laboratory Graduate School of Science The University of Tokyo, Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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15
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Kobayashi S. Flow "Fine" Synthesis: High Yielding and Selective Organic Synthesis by Flow Methods. Chem Asian J 2016; 11:425-36. [PMID: 26337828 PMCID: PMC4770433 DOI: 10.1002/asia.201500916] [Citation(s) in RCA: 167] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Indexed: 01/15/2023]
Abstract
The concept of flow "fine" synthesis, that is, high yielding and selective organic synthesis by flow methods, is described. Some examples of flow "fine" synthesis of natural products and APIs are discussed. Flow methods have several advantages over batch methods in terms of environmental compatibility, efficiency, and safety. However, synthesis by flow methods is more difficult than synthesis by batch methods. Indeed, it has been considered that synthesis by flow methods can be applicable for the production of simple gasses but that it is difficult to apply to the synthesis of complex molecules such as natural products and APIs. Therefore, organic synthesis of such complex molecules has been conducted by batch methods. On the other hand, syntheses and reactions that attain high yields and high selectivities by flow methods are increasingly reported. Flow methods are leading candidates for the next generation of manufacturing methods that can mitigate environmental concerns toward sustainable society.
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Affiliation(s)
- Shū Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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16
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Sadjadi S, Heravi MM. Pd(0) encapsulated nanocatalysts as superior catalytic systems for Pd-catalyzed organic transformations. RSC Adv 2016. [DOI: 10.1039/c6ra18049c] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
In the last decade, Pd(0) nanoparticles have attracted increasing attention due to their outstanding utility as nanocatalysts in a wide variety of key chemical reactions.
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Affiliation(s)
- S. Sadjadi
- Iran Polymer and Petrochemical Institute
- Tehran
- Iran
| | - M. M. Heravi
- Department of Chemistry
- School of Science
- Alzahra University
- Tehran
- Iran
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17
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Yasukawa T, Miyamura H, Kobayashi S. Cellulose-supported chiral rhodium nanoparticles as sustainable heterogeneous catalysts for asymmetric carbon-carbon bond-forming reactions. Chem Sci 2015; 6:6224-6229. [PMID: 30090239 PMCID: PMC6054049 DOI: 10.1039/c5sc02510a] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2015] [Accepted: 08/11/2015] [Indexed: 11/24/2022] Open
Abstract
Cellulose-supported chiral Rh nanoparticle (NP) catalysts have been developed. The Rh NPs, which were well dispersed on cellulose, catalyzed the asymmetric 1,4-addition of arylboronic acids to enones and enoates, one of the representative asymmetric carbon-carbon bond-forming reactions, in the presence of chiral diene ligands, providing the corresponding adducts in high yields with outstanding enantioselectivities without metal leaching. The solid-state NMR analysis of the chiral NP system directly suggested interactions between the Rh NPs and the chiral ligand on cellulose. This is the first example of using polysaccharide-supported chiral metal nanoparticles for asymmetric carbon-carbon bond-forming reactions.
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Affiliation(s)
- Tomohiro Yasukawa
- Department of Chemistry , School of Science , The University of Tokyo , Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan .
| | - Hiroyuki Miyamura
- Department of Chemistry , School of Science , The University of Tokyo , Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan .
| | - Shū Kobayashi
- Department of Chemistry , School of Science , The University of Tokyo , Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan .
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18
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Kobayashi S, Okumura M, Akatsuka Y, Miyamura H, Ueno M, Oyamada H. Powerful Continuous-Flow Hydrogenation by using Poly(dimethyl)silane-Supported Palladium Catalysts. ChemCatChem 2015. [DOI: 10.1002/cctc.201500973] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shū Kobayashi
- Department of Chemistry, School of Science; The University of Tokyo; Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Mikiko Okumura
- Department of Chemistry, School of Science; The University of Tokyo; Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Yuichi Akatsuka
- Department of Chemistry, School of Science; The University of Tokyo; Hongo Bunkyo-ku Tokyo 113-0033 Japan
- Nikko Chemicals Co. Ltd.; Nasu Factory; 1844 Kamiishigami Ohtawara Tochigi 324-0037 Japan
| | - Hiroyuki Miyamura
- Department of Chemistry, School of Science; The University of Tokyo; Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Masaharu Ueno
- Department of Chemistry, School of Science; The University of Tokyo; Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Hidekazu Oyamada
- Department of Chemistry, School of Science; The University of Tokyo; Hongo Bunkyo-ku Tokyo 113-0033 Japan
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19
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Di Pietrantonio K, Coccia F, Tonucci L, d'Alessandro N, Bressan M. Hydrogenation of allyl alcohols catalyzed by aqueous palladium and platinum nanoparticles. RSC Adv 2015. [DOI: 10.1039/c5ra13840j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hydrogenations of allyl alcohols in aqueous media, at room temperature and pressure, were performed in presence of Pd or Pt lignin nanoparticles as catalysts to obtain saturated alcohols.
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Affiliation(s)
| | - Francesca Coccia
- Department of Engineering and Geology
- G. d'Annunzio University of Chieti-Pescara
- Italy
| | - Lucia Tonucci
- Department of Philosophical
- Educational and Economic Sciences
- G. d'Annunzio University of Chieti-Pescara
- Italy
| | - Nicola d'Alessandro
- Department of Engineering and Geology
- G. d'Annunzio University of Chieti-Pescara
- Italy
| | - Mario Bressan
- Department of Engineering and Geology
- G. d'Annunzio University of Chieti-Pescara
- Italy
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20
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Ueno M, Morii Y, Uramoto K, Oyamada H, Mori Y, Kobayashi S. Catalytic Flow Hydrogenation of Aromatic Nitro Compounds Using Polysilane-Supported Palladium. J Flow Chem 2014. [DOI: 10.1556/jfc-d-14-00024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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22
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23
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Linear, branched and network polysilanes with thienyl/furyl substituted sila-alkyl side chains and their applications for the synthesis of fluorescent silver nanoparticles/clusters. J CHEM SCI 2013. [DOI: 10.1007/s12039-012-0322-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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24
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Tarabukina E, Krasova A, Filippov A, Sacarescu L, Simionescu M, Sacarescu G, Soroceanu M, Harabagiu V. Hydrodynamic and molecular characteristics of organosilane copolymers of low molecular weight. HIGH PERFORM POLYM 2012. [DOI: 10.1177/0954008312456890] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Molecular hydrodynamics and light scattering measurements have been carried out in dilute solutions of polysilanes copolymers containing segments with different degrees of rotational freedom. For this purpose, three low-molecular-weight linear polydiphenylsilane copolymeric structures containing various amounts of methylhydrosilylene or methylphenylsilylene flexible units have been synthesized and studied. The molecular and hydrodynamic properties of the diphenylsilane copolymers proved to be dependent on their composition and on the chemical structure of the second co-monomer.
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Affiliation(s)
- Elena Tarabukina
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Saint-Petersburg, Russia
| | - Anna Krasova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Saint-Petersburg, Russia
| | - Alexander Filippov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Saint-Petersburg, Russia
| | - Liviu Sacarescu
- Petru Poni Institute of Macromolecular Chemistry, Romanian Academy, Iasi, Romania
| | - Mihaela Simionescu
- Petru Poni Institute of Macromolecular Chemistry, Romanian Academy, Iasi, Romania
| | - Gabriela Sacarescu
- Petru Poni Institute of Macromolecular Chemistry, Romanian Academy, Iasi, Romania
| | - Marius Soroceanu
- Petru Poni Institute of Macromolecular Chemistry, Romanian Academy, Iasi, Romania
| | - Valeria Harabagiu
- Petru Poni Institute of Macromolecular Chemistry, Romanian Academy, Iasi, Romania
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25
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Shankar R, Sahoo U. Scope of network polysilanes in the synthesis of fluorescent silver and gold nanoparticles/nanoclusters-modulations of their optical properties in the presence of Hg(II) ions. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.25876] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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26
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Oyamada H, Naito T, Kobayashi S. Continuous flow hydrogenation using polysilane-supported palladium/alumina hybrid catalysts. Beilstein J Org Chem 2011; 7:735-9. [PMID: 21804868 PMCID: PMC3135162 DOI: 10.3762/bjoc.7.83] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Accepted: 05/04/2011] [Indexed: 11/23/2022] Open
Abstract
Continuous flow systems for hydrogenation using polysilane-supported palladium/alumina (Pd/(PSi-Al(2)O(3))) hybrid catalysts were developed. Our original Pd/(PSi-Al(2)O(3)) catalysts were used successfully in these systems and the hydrogenation of unsaturated C-C bonds and a nitro group, deprotection of a carbobenzyloxy (Cbz) group, and a dehalogenation reaction proceeded smoothly. The catalyst retained high activity for at least 8 h under neat conditions.
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Affiliation(s)
- Hidekazu Oyamada
- Department of Chemistry, School of Science and Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Shankar R, Sahoo U, Shahi V. Synthesis and Characterization of Fluorescent Polymer−Metal Nanocomposites Comprising Poly(silylene-co-silyne)s and Silver Nanoparticles. Macromolecules 2011. [DOI: 10.1021/ma200038x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ravi Shankar
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
| | - Usharani Sahoo
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
| | - Vandana Shahi
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
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Akiyama R, Kobayashi S. "Microencapsulated" and related catalysts for organic chemistry and organic synthesis. Chem Rev 2009; 109:594-642. [PMID: 19209943 DOI: 10.1021/cr800529d] [Citation(s) in RCA: 199] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ryo Akiyama
- Department of Chemistry, School of Science, The University of Tokyo, The HFRE Division, ERATO, JST, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Lucchesi C, Inasaki T, Miyamura H, Matsubara R, Kobayashi S. Aerobic Oxidation of Alcohols under Mild Conditions Catalyzed by Novel Polymer-Incarcerated, Carbon-Stabilized Gold Nanoclusters. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800319] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ueno M, Suzuki T, Naito T, Oyamada H, Kobayashi S. Development of microchannel reactors using polysilane-supported palladium catalytic systems in capillaries. Chem Commun (Camb) 2008:1647-9. [DOI: 10.1039/b715259k] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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