1
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Avanthay M, Goodrich OH, Tiemessen D, Alder CM, George MW, Lennox AJJ. Bromide-Mediated Silane Oxidation: A Practical Counter-Electrode Process for Nonaqueous Deep Reductive Electrosynthesis. JACS AU 2024; 4:2220-2227. [PMID: 38938809 PMCID: PMC11200245 DOI: 10.1021/jacsau.4c00186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 05/17/2024] [Accepted: 05/17/2024] [Indexed: 06/29/2024]
Abstract
The counter-electrode process of an organic electrochemical reaction is integral for the success and sustainability of the process. Unlike for oxidation reactions, counter-electrode processes for reduction reactions remain limited, especially for deep reductions that apply very negative potentials. Herein, we report the development of a bromide-mediated silane oxidation counter-electrode process for nonaqueous electrochemical reduction reactions in undivided cells. The system is found to be suitable for replacing either sacrificial anodes or a divided cell in several reported reactions. The conditions are metal-free, use inexpensive reagents and a graphite anode, are scalable, and the byproducts are reductively stable and readily removed. We showcase the translation of a previously reported divided cell reaction to a >100 g scale in continuous flow.
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Affiliation(s)
- Mickaël
E. Avanthay
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
| | - Oliver H. Goodrich
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K.
| | - David Tiemessen
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K.
| | - Catherine M. Alder
- Modalities
Platform Technologies, Molecular Modalities Discovery, GSK Medicines Research Centre, Stevenage SG1 2NY, U.K.
| | - Michael W. George
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K.
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2
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Liu T, Zhu L, Li C, Yu Y, Zhang Z, Liu H, Wang L, Li Y. Fe-CP-based Catalytic Oxidation and Dissipative Self-Assembly of a Ferrocenyl Surfactant Applied in DNA Capture and Release. ACS OMEGA 2024; 9:23772-23781. [PMID: 38854516 PMCID: PMC11154932 DOI: 10.1021/acsomega.4c01715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 04/25/2024] [Accepted: 04/26/2024] [Indexed: 06/11/2024]
Abstract
Dissipative self-assembly plays a vital role in fabricating intelligent and transient materials. The selection and design of the molecular structure is critical, and the introduction of valuable stimuli-responsive motifs into building blocks would bring about a novel perspective on the fuel driven nonequilibrium assemblies. For redox-responsive surfactants, novel methods of catalytic oxidation are very important for their activation/deactivation process through designing fuel input/energy dissipation. As an enzyme with a fast catalytic rate, Fe-based coordination polymers (Fe-CPs) are found to be highly effective oxidase-like enzymes to induce a reversible switch of a ferrocene-based surfactant over a wide range of temperatures and pH. This builds a bridge between the CPs materials and surfactants. Furthermore, glucose oxidase can also induce a switchable transition of a ferrocene-based surfactant. The GOX-catalyzed, glucose-fueled transient surfactant assemblies have been fabricated for many cycles, which has a successful application in a time-controlled and autonomous DNA capture and release process. The intelligent use of enzymes including CPs and GOX in ferrocene-based surfactants will pave the way for the oxidation of redox surfactants, which extends the application of stable or transient ferrocenyl self-assemblies.
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Affiliation(s)
- Ting Liu
- School
of Chemistry and Chemical Engineering, Center of Cosmetics, Qilu Normal University, Jinan 250200, Shandong Province, China
| | - Liwei Zhu
- School
of Chemistry and Chemical Engineering, Center of Cosmetics, Qilu Normal University, Jinan 250200, Shandong Province, China
| | - Chencan Li
- School
of Chemistry and Chemical Engineering, Center of Cosmetics, Qilu Normal University, Jinan 250200, Shandong Province, China
| | - Yang Yu
- School
of Chemistry and Chemical Engineering, Center of Cosmetics, Qilu Normal University, Jinan 250200, Shandong Province, China
| | - Zhuo Zhang
- School
of Chemistry and Chemical Engineering, Center of Cosmetics, Qilu Normal University, Jinan 250200, Shandong Province, China
| | - Huizhong Liu
- School
of Mechatronics and Automobile Engineering, Yantai University, Yantai 264005, Shandong Province, China
| | - Ling Wang
- School
of Chemistry and Chemical Engineering, Center of Cosmetics, Qilu Normal University, Jinan 250200, Shandong Province, China
| | - Yawen Li
- School
of Chemistry and Chemical Engineering, Center of Cosmetics, Qilu Normal University, Jinan 250200, Shandong Province, China
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3
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Ishii R, Sunada Y. Planar three-coordinate iron(II) complexes supported by sterically demanding -Si(SiMe 3) 2(SiMe 2tBu) ligands. Dalton Trans 2024; 53:1421-1424. [PMID: 38179802 DOI: 10.1039/d3dt04130a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Sterically demanding organosilyl ligands support the formation of coordinatively unsaturated complexes. In this study, we found that using the ligand -Si(SiMe3)2(SiMe2tBu) affords exclusively planar three-coordinate iron bis(silyl) complexes that show good catalytic performance in the hydrosilylation of acetophenone.
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Affiliation(s)
- Reon Ishii
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Yusuke Sunada
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan
- Institute of Industrial Science, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan
- JST PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
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4
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Ishii R, Nakagawa M, Wada Y, Sunada Y. Four- and three-coordinate planar iron(II) complexes supported by bulky organosilyl ligands. Dalton Trans 2023; 52:15124-15130. [PMID: 37814966 DOI: 10.1039/d3dt02219f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
The ligand exchange reaction of (THF)2Fe[Si(SiMe3)3]2 with 2 equivalents of an N-heterocyclic carbene (NHC) led to the formation of a square-planar iron(II) complex with trans-oriented -Si(SiMe3)3 ligands. Conversely, the introduction of a cis-coordinate bidentate organosilyl ligand instead of -Si(SiMe3)3 resulted in the formation of a square planar iron(II) complex supported by a cis-coordinate bidentate organosilyl ligand. A three-coordinate planar iron(II) bis(silyl) complex was also synthesized using a cis-coordinate bidentate organosilyl ligand and a cyclic (alkyl)(amino)carbene auxiliary ligand. Investigation of the catalytic performance of these complexes in the hydrosilylation of acetophenone revealed that the square-planar iron(II) complex with trans-oriented -Si(SiMe3)3 ligands exhibits superior reactivity relative to its tetrahedral precursor.
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Affiliation(s)
- Reon Ishii
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan.
| | - Minesato Nakagawa
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan.
| | - Yoshimasa Wada
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan.
- Institute of Industrial Science, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Yusuke Sunada
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan.
- Institute of Industrial Science, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan
- JST PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
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5
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Hou J, Han X, Zhang Y, Huang J, Wang J, Yuan K. Triflic Acid/Silane Promoted Deoxygenative Transformation of Ketones via Carbocations. Org Lett 2023; 25:5709-5713. [PMID: 37527406 DOI: 10.1021/acs.orglett.3c01762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
Deoxygenative transformation of ketones into value-added products often suffers from precious-metal-based catalysts or complicated operational conditions. Triflic acid and silane serve as a cooperative reductant to transform ketones via carbocations that undergo β-H elimination much faster than hydride transfer from silane to produce alkenes with high selectivity. Alternatively, the presence of indoles would incept the protonated ketones to generate carbocations, allowing access to Csp2-Csp3 bond formation with high reactivity and selectivity in "one pot".
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Affiliation(s)
- Jianxin Hou
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Xue Han
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Yiyi Zhang
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Jiahui Huang
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, the NMPA and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences and the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, China
| | - Jiawei Wang
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Kedong Yuan
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, the NMPA and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences and the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, China
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6
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Umehara Y, Usui R, Wada Y, Sunada Y. Dinuclear and tetranuclear group 10 metal complexes constructed from linear tetrasilane comprising both Si-H and Si-Si moieties. Commun Chem 2023; 6:93. [PMID: 37188952 DOI: 10.1038/s42004-023-00892-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 05/02/2023] [Indexed: 05/17/2023] Open
Abstract
The activation of Si-H bonds and/or Si-Si bonds in organosilicon compounds by transition-metal species plays a crucial role for the production of functional organosilicon compounds. Although group-10-metal species are frequently used to activate Si-H and/or Si-Si bonds, so far, systematic investigation to clarify the preferences of these metal species with respect to the activation of Si-H and/or Si-Si bonds remain elusive. Here, we report that platinum(0) species that bear isocyanide or N-heterocyclic-carbene (NHC) ligands selectively activates the terminal Si-H bonds of the linear tetrasilane Ph2(H)SiSiPh2SiPh2Si(H)Ph2 in a stepwise manner, whereby the Si-Si bonds remain intact. In contrast, analogous palladium(0) species are preferably inserted into the Si-Si bonds of the same linear tetrasilane, whereby the terminal Si-H bonds remain intact. Substitution of the terminal hydride groups in Ph2(H)SiSiPh2SiPh2Si(H)Ph2 with chloride groups leads to the insertion of platinum(0) isocyanide into all Si-Si bonds to afford an unprecedented zig-zag Pt4 cluster.
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Affiliation(s)
- Yoshihiko Umehara
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan
| | - Ryosuke Usui
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan
| | - Yoshimasa Wada
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan
| | - Yusuke Sunada
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
- JST PRESTO, Honcho, Kawaguchi, Saitama, 332-0012, Japan.
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7
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Rygus JPG, Hall DG. Direct nucleophilic and electrophilic activation of alcohols using a unified boron-based organocatalyst scaffold. Nat Commun 2023; 14:2563. [PMID: 37142592 PMCID: PMC10160031 DOI: 10.1038/s41467-023-38228-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 04/18/2023] [Indexed: 05/06/2023] Open
Abstract
Organocatalytic strategies for the direct activation of hydroxy-containing compounds have paled in comparison to those applicable to carbonyl compounds. To this end, boronic acids have emerged as valuable catalysts for the functionalization of hydroxy groups in a mild and selective fashion. Distinct modes of activation in boronic acid-catalyzed transformations are often accomplished by vastly different catalytic species, complicating the design of broadly applicable catalyst classes. Herein, we report the use of benzoxazaborine as a general scaffold for the development of structurally related yet mechanistically divergent catalysts for the direct nucleophilic and electrophilic activation of alcohols under ambient conditions. The utility of these catalysts is demonstrated in the monophosphorylation of vicinal diols and the reductive deoxygenation of benzylic alcohols and ketones respectively. Mechanistic studies of both processes reveal the contrasting nature of key tetravalent boron intermediates in the two catalytic manifolds.
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Affiliation(s)
- Jason P G Rygus
- Department of Chemistry, Centennial Center for Interdisciplinary Science, University of Alberta, Edmonton, AB, T6G 2G2, Canada
| | - Dennis G Hall
- Department of Chemistry, Centennial Center for Interdisciplinary Science, University of Alberta, Edmonton, AB, T6G 2G2, Canada.
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8
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Wang Y, Wu X, Yang L, Liu W, Zhang Z, Xie X. Sequential KO tBu/FeCl 3-catalyzed reductive phosphonylation of tertiary amides for the synthesis of α-amino phosphonates and phosphines. Org Biomol Chem 2023; 21:2955-2959. [PMID: 36935630 DOI: 10.1039/d3ob00211j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
A simple, mild and efficient sequential KOtBu/FeCl3-catalyzed reductive phosphonylation of tertiary amides is herein described. This process first involved the KOtBu-catalyzed selective semi-reduction of tertiary amides to hemiaminal intermediates by TMDS (1,1,3,3-tetramethyldisiloxane) and then the FeCl3-catalyzed nucleophilic addition of the hemiaminal intermediates to phosphonates, which allowed the straightforward synthesis of α-amino phosphonates in moderate to good yields. This method applied well to amides and lactams that bear no strong acidic α-hydrogens, and various functional groups, including methoxy, methylthio, cyano, halogen, and heterocycles, could be tolerated.
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Affiliation(s)
- Yue Wang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China.
| | - Xiaoyu Wu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China.
| | - Liqun Yang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China.
| | - Wei Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China.
| | - Zhaoguo Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China.
| | - Xiaomin Xie
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China.
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9
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Jiang J, Feng S, Chang J. Diiodine–Triethylsilane System: Formation of N-Alkylsulfonamides from Aldehydes or Ketones and Sulfonamides. Synlett 2023. [DOI: 10.1055/s-0042-1751431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
AbstractReductive amination has not been commonly used in the preparation of N-alkylsulfonamides because of the low nucleophilicity of sulfonamides. In this work, a protocol for the synthesis of N-alkylsulfonamides from aldehydes or ketones and sulfonamides was developed. Molecular iodine, triethylsilane, and ethyl acetate were used as the initiator, reductant, and solvent, respectively. The key role of triethyl(iodo)silane in the reaction was confirmed through control experiments.
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Affiliation(s)
- Jin Jiang
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering
| | - Siyan Feng
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering
| | - Jinming Chang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University
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10
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Denker L, Wullschläger D, Martínez JP, Świerczewski S, Trzaskowski B, Tamm M, Frank R. Cobalt(I)-Catalyzed Transformation of Si–H Bonds: H/D Exchange in Hydrosilanes and Hydrosilylation of Olefins. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- Lars Denker
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106Braunschweig, Germany
| | - Daniela Wullschläger
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106Braunschweig, Germany
| | - Juan Pablo Martínez
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097Warsaw, Poland
| | - Stanisław Świerczewski
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097Warsaw, Poland
- College of Inter-faculty Individual Studies in Mathematics and Natural Sciences, University of Warsaw, Banacha 2C, 02-097Warsaw, Poland
| | - Bartosz Trzaskowski
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097Warsaw, Poland
| | - Matthias Tamm
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106Braunschweig, Germany
| | - René Frank
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106Braunschweig, Germany
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11
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Clarke J, Seo Y, Gagné MR, Bender TA. Achieving Site-Selective C–O Bond Reduction for High-Value Cellulosic Valorization. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04768] [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]
Affiliation(s)
- Joshua Clarke
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Youngran Seo
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Michel R. Gagné
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Trandon A. Bender
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
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12
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Dalling AG, Späth G, Fürstner A. Total Synthesis of the Tetracyclic Pyridinium Alkaloid epi-Tetradehydrohalicyclamine B. Angew Chem Int Ed Engl 2022; 61:e202209651. [PMID: 35971850 PMCID: PMC9826155 DOI: 10.1002/anie.202209651] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Indexed: 01/11/2023]
Abstract
The first total synthesis of a tetracyclic marine pyridinium alkaloid hinged on recent advances in chemoselectivity management: While many classical methods failed to afford the perceptively simple pyridine-containing core of the target, nickel/iridium photoredox dual catalysis allowed the critical C-C bond to be formed in good yield. Likewise, ring closing alkyne metathesis (RCAM) worked well in the presence of the unhindered pyridine despite the innately Lewis acidic Mo(+6) center of the alkylidyne catalyst. Finally, an iridium catalyzed hydrosilylation was uniquely effective in reducing a tertiary amide without compromising an adjacent pyridine and the lateral double bonds; this transformation is largely without precedent. The second strained macrocycle enveloping the core was closed by intramolecular N-alkylation with formation of the pyridinium unit; the reaction proceeded site- and chemoselectively in the presence of an a priori more basic tertiary amine.
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Affiliation(s)
| | - Georg Späth
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
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13
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Dalling AG, Späth G, Fürstner A. Total Synthesis of the Tetracyclic Pyridinium Alkaloid epi‐Tetradehydrohalicyclamine B. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202209651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrew G. Dalling
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Organometallic Chemistry GERMANY
| | - Georg Späth
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Organometallic Chemistry GERMANY
| | - Alois Fürstner
- Max-Planck-Institut fur Kohlenforschung Organometallic Chemistry Kaiser-Wilhelm-Platz 1 45470 Mülheim/Ruhr GERMANY
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14
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Reactivity of Waterlogged Archeological Elm Wood with Organosilicon Compounds Applied as Wood Consolidants: 2D 1H- 13C Solution-State NMR Studies. Molecules 2022; 27:molecules27113407. [PMID: 35684343 PMCID: PMC9181845 DOI: 10.3390/molecules27113407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 12/02/2022] Open
Abstract
Some organosilicon compounds, including alkoxysilanes and siloxanes, proved effective in stabilizing the dimensions of waterlogged archaeological wood during drying, which is essential in the conservation process of ancient artifacts. However, it was difficult to determine a strong correlation between the wood stabilizing effect and the properties of organosilicon compounds, such as molecular weight and size, weight percent gain, and the presence of other potentially reactive groups. Therefore, to better understand the mechanism behind the stabilization effectiveness, the reactivity of organosilicons with wood polymers was studied using a 2D 1H–13C solution-state NMR technique. The results showed an extensive modification of lignin through its demethoxylation and decarbonylation and also the absence of the native cellulose anomeric peak in siloxane-treated wood. The most substantial reactivity between wood polymers and organosilicon was observed with the (3-mercaptopropyl)trimethoxysilane treatment, showing complete removal of lignin side chains, the lowest syringyl/guaiacyl ratio, depolymerization of cellulose and xylan, and reactivity with the C6 primary hydroxyls in cellulose. This may explain the outstanding stabilizing effectiveness of this silane and supports the conclusion that extensive chemical interactions are essential in this process. It also indicates the vital role of a mercapto group in wood stabilization by organosilicons. This 2D NMR technique sheds new light on the chemical mechanisms involved in organosilicon consolidation of wood and reveals what chemical characteristics are essential in developing future conservation treatments.
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15
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Starr HE, Gagné MR. Probing the Source of Enhanced Activity in Multiborylated Silsesquioxane Catalysts for C–O Bond Reduction. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hannah E. Starr
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, United States
| | - Michel R. Gagné
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, United States
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16
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Wang XG, Ou W, Liu MH, Liu ZJ, Huang PQ. Tandem Catalysis Enabled Highly Chemoselective Deoxygenative Alkynylation and Alkylation of Tertiary Amides: A Versatile Entry to Functionalized α-Substituted Amines. Org Chem Front 2022. [DOI: 10.1039/d2qo00335j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report here the highly chemoseive catalytic reductive alkynylation and reductive alkylation of tertiary amides to give propargylamines and α-branched amines, respectively. The method features a tandem iridium (Vaska’s complex)-catalyzed...
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17
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Chen PH, Hsu CP, Tseng HC, Liu YH, Chiu CW. [Mes- B-TMP] + borinium cation initiated cyanosilylation and catalysed hydrosilylation of ketones and aldehydes. Chem Commun (Camb) 2021; 57:13732-13735. [PMID: 34870288 DOI: 10.1039/d1cc06319g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two aryl amino borinium cations derived from Cl(Mes)B-NR2 (NR2 = TMP, HMDS) faced divergent outcomes. As the HMDS-substituted one underwent methyl migration from silicon to boron transforming the putative borinium ion to a silylium ion, [Mes-B-TMP]+ can initiate cyanosilylation and catalyse hydrosilylation of ketones and aldehydes.
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Affiliation(s)
- Po-Han Chen
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
| | - Ching-Pei Hsu
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
| | - Hsi-Ching Tseng
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
| | - Yi-Hung Liu
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
| | - Ching-Wen Chiu
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617, Taiwan, Republic of China.
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18
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Durin G, Berthet JC, Nicolas E, Thuéry P, Cantat T. The Role of (tBuPOCOP)Ir(I) and Iridium(III) Pincer Complexes in the Catalytic Hydrogenolysis of Silyl Triflates into Hydrosilanes. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00576] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gabriel Durin
- Université Paris-Saclay, CEA, CNRS, NIMBE, CEDEX 91191 Gif-sur-Yvette, France
| | - Jean-Claude Berthet
- Université Paris-Saclay, CEA, CNRS, NIMBE, CEDEX 91191 Gif-sur-Yvette, France
| | - Emmanuel Nicolas
- Université Paris-Saclay, CEA, CNRS, NIMBE, CEDEX 91191 Gif-sur-Yvette, France
| | - Pierre Thuéry
- Université Paris-Saclay, CEA, CNRS, NIMBE, CEDEX 91191 Gif-sur-Yvette, France
| | - Thibault Cantat
- Université Paris-Saclay, CEA, CNRS, NIMBE, CEDEX 91191 Gif-sur-Yvette, France
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19
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Stoica A, Damoc M, Baltag L, Macsim A, Nicolescu A, Dinu MV, Ionita G, Cazacu M. One‐pot reduction‐hydrophobization of heterogenized platinum with 1,1,3,3‐tetramethyldisiloxane. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Madalin Damoc
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | - Laurentiu Baltag
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | - Ana‐Maria Macsim
- NMR Laboratory “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | - Alina Nicolescu
- NMR Laboratory “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | - Maria Valentina Dinu
- Department of Functional Polymers “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
| | - Gheorghe Ionita
- ICSI Nuclear Department National Institute of Cryogenic and Isotopic Technologies Valcea Romania
| | - Maria Cazacu
- Department of Inorganic Polymers “Petru Poni” Institute of Macromolecular Chemistry Iasi Romania
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20
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Tai ZS, Othman MHD, Mustafa A, Ravi J, Wong KC, Koo KN, Hubadillah SK, Azali MA, Alias NH, Ng BC, Mohamed Dzahir MIH, Ismail AF, Rahman MA, Jaafar J. Development of hydrophobic polymethylhydrosiloxane/tetraethylorthosilicate (PMHS/TEOS) hybrid coating on ceramic membrane for desalination via membrane distillation. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119609] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Stadler BM, de Vries JG. Chemical upcycling ofpolymers. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2021; 379:20200341. [PMID: 34510924 DOI: 10.1098/rsta.2020.0341] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/28/2021] [Indexed: 06/13/2023]
Abstract
As the production volume of polymers increases, so does the amount of plastic waste. Plastic recycling is one of the concepts to address in this issue. Unfortunately, only a small fraction of plastic waste is recycled. Even with the development of polymers for closed loop recycling that can be in theory reprocessed infinitely the inherent dilemma is that because of collection, cleaning and separation processes the obtained materials simply are not cost competitive with virgin materials. Chemical upcycling, the conversion of polymers to higher valuable products, either polymeric or monomeric, could mitigate this issue. In the following article, we highlight recent examples in this young but fast-growing field. This article is part of the theme issue 'Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 2)'.
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Affiliation(s)
- Bernhard M Stadler
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock), Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
| | - Johannes G de Vries
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock), Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
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22
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Lluna‐Galán C, Izquierdo‐Aranda L, Adam R, Cabrero‐Antonino JR. Catalytic Reductive Alcohol Etherifications with Carbonyl-Based Compounds or CO 2 and Related Transformations for the Synthesis of Ether Derivatives. CHEMSUSCHEM 2021; 14:3744-3784. [PMID: 34237201 PMCID: PMC8518999 DOI: 10.1002/cssc.202101184] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/07/2021] [Indexed: 05/27/2023]
Abstract
Ether derivatives have myriad applications in several areas of chemical industry and academia. Hence, the development of more effective and sustainable protocols for their production is highly desired. Among the different methodologies reported for ether synthesis, catalytic reductive alcohol etherifications with carbonyl-based moieties (aldehydes/ketones and carboxylic acid derivatives) have emerged in the last years as a potential tool. These processes constitute appealing routes for the selective production of both symmetrical and asymmetrical ethers (including O-heterocycles) with an increased molecular complexity. Likewise, ester-to-ether catalytic reductions and hydrogenative alcohol etherifications with CO2 to dialkoxymethanes and other acetals, albeit in less extent, have undergone important advances, too. In this Review, an update of the recent progresses in the area of catalytic reductive alcohol etherifications using carbonyl-based compounds and CO2 have been described with a special focus on organic synthetic applications and catalyst design. Complementarily, recent progress made in catalytic acetal/ketal-to-ether or ester-to-ether reductions and other related transformations have been also summarized.
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Affiliation(s)
- Carles Lluna‐Galán
- Instituto de Tecnología QuímicaUniversitat Politécnica de València-Consejo Superior Investigaciones Científicas (UPV-CSIC)Avda. de los Naranjos s/n46022ValenciaSpain
| | - Luis Izquierdo‐Aranda
- Instituto de Tecnología QuímicaUniversitat Politécnica de València-Consejo Superior Investigaciones Científicas (UPV-CSIC)Avda. de los Naranjos s/n46022ValenciaSpain
| | - Rosa Adam
- Instituto de Tecnología QuímicaUniversitat Politécnica de València-Consejo Superior Investigaciones Científicas (UPV-CSIC)Avda. de los Naranjos s/n46022ValenciaSpain
| | - Jose R. Cabrero‐Antonino
- Instituto de Tecnología QuímicaUniversitat Politécnica de València-Consejo Superior Investigaciones Científicas (UPV-CSIC)Avda. de los Naranjos s/n46022ValenciaSpain
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23
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Durin G, Berthet JC, Nicolas E, Cantat T. Unlocking the Catalytic Hydrogenolysis of Chlorosilanes into Hydrosilanes with Superbases. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01515] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gabriel Durin
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette Cedex, France
| | - Jean-Claude Berthet
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette Cedex, France
| | - Emmanuel Nicolas
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette Cedex, France
| | - Thibault Cantat
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette Cedex, France
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24
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Ulm F, Shahane S, Truong‐Phuoc L, Romero T, Papaefthimiou V, Chessé M, Chetcuti MJ, Pham‐Huu C, Michon C, Ritleng V. Half‐Sandwich Nickel(II) NHC‐Picolyl Complexes as Catalysts for the Hydrosilylation of Carbonyl Compounds: Evidence for NHC‐Nickel Nanoparticles under Harsh Reaction Conditions. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Franck Ulm
- Université de Strasbourg Ecole Européenne de Chimie Polymères et Matériaux CNRS LIMA UMR 7042 25 rue Becquerel 67087 Strasbourg France
| | - Saurabh Shahane
- Université de Strasbourg Ecole Européenne de Chimie Polymères et Matériaux CNRS LIMA UMR 7042 25 rue Becquerel 67087 Strasbourg France
| | - Lai Truong‐Phuoc
- Université de Strasbourg Institute of Chemistry and Processes for Energy Environment and Health (ICPEES) UMR 7515 CNRS 25 rue Becquerel 67087 Strasbourg France
| | - Thierry Romero
- Université de Strasbourg Institute of Chemistry and Processes for Energy Environment and Health (ICPEES) UMR 7515 CNRS 25 rue Becquerel 67087 Strasbourg France
| | - Vasiliki Papaefthimiou
- Université de Strasbourg Institute of Chemistry and Processes for Energy Environment and Health (ICPEES) UMR 7515 CNRS 25 rue Becquerel 67087 Strasbourg France
| | - Matthieu Chessé
- Université de Strasbourg Ecole Européenne de Chimie Polymères et Matériaux CNRS LIMA UMR 7042 25 rue Becquerel 67087 Strasbourg France
| | - Michael J. Chetcuti
- Université de Strasbourg Ecole Européenne de Chimie Polymères et Matériaux CNRS LIMA UMR 7042 25 rue Becquerel 67087 Strasbourg France
| | - Cuong Pham‐Huu
- Université de Strasbourg Institute of Chemistry and Processes for Energy Environment and Health (ICPEES) UMR 7515 CNRS 25 rue Becquerel 67087 Strasbourg France
- University of Strasbourg Institute for Advanced Study (USIAS) 5 allée du Général Rouvillois 67083 Strasbourg France
| | - Christophe Michon
- Université de Strasbourg Ecole Européenne de Chimie Polymères et Matériaux CNRS LIMA UMR 7042 25 rue Becquerel 67087 Strasbourg France
- University of Strasbourg Institute for Advanced Study (USIAS) 5 allée du Général Rouvillois 67083 Strasbourg France
| | - Vincent Ritleng
- Université de Strasbourg Ecole Européenne de Chimie Polymères et Matériaux CNRS LIMA UMR 7042 25 rue Becquerel 67087 Strasbourg France
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25
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Buono F, Nguyen T, Qu B, Wu H, Haddad N. Recent Advances in Nonprecious Metal Catalysis. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00053] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Frederic Buono
- Chemical Development US, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, Connecticut 06877, United States
| | - Thach Nguyen
- Chemical Development US, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, Connecticut 06877, United States
| | - Bo Qu
- Chemical Development US, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, Connecticut 06877, United States
| | - Hao Wu
- Chemical Development US, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, Connecticut 06877, United States
| | - Nizar Haddad
- Chemical Development US, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, Connecticut 06877, United States
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26
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Peralta-Neel Z, Woerpel KA. Hydroperoxidations of Alkenes using Cobalt Picolinate Catalysts. Org Lett 2021; 23:5002-5006. [PMID: 34125543 DOI: 10.1021/acs.orglett.1c01489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Hydroperoxides were synthesized in one step from various alkenes using Co(pic)2 as the catalyst with molecular oxygen and tetramethyldisiloxane (TMDSO). The hydration product could be obtained using a modified catalyst, Co(3-mepic)2, with molecular oxygen and phenylsilane. Formation of hydroperoxides occurred through a rapid Co-O bond metathesis of a peroxycobalt compound with isopropanol.
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Affiliation(s)
- Zulema Peralta-Neel
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - K A Woerpel
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
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27
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Jiang J, Xiao L, Li YL. Diiodine–Triethylsilane System: Reduction of N-Sulfonyl Aldimines to N-Alkylsulfonamides. Synlett 2021. [DOI: 10.1055/s-0040-1706544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractBecause molecular iodine and hydrosilanes are stable to both air and moisture, reactions using these reagents are easy to operate and require mild reaction conditions. Molecular iodine and a hydrosilane were used to reduce N-sulfonyl aldimines to the corresponding N-alkylsulfonamides. This transformation is a practical method for the synthesis of N-alkylsulfonamides.
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Affiliation(s)
- Jin Jiang
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering
- Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education
| | - Lili Xiao
- School of Materials Science and Engineering, Sichuan University of Science and Engineering
| | - Yu-Long Li
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering
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28
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When Attempting Chain Extension, Even Without Solvent, It Is Not Possible to Avoid Chojnowski Metathesis Giving D 3. Molecules 2021; 26:molecules26010231. [PMID: 33466286 PMCID: PMC7795595 DOI: 10.3390/molecules26010231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 12/29/2020] [Accepted: 12/31/2020] [Indexed: 11/17/2022] Open
Abstract
A simple, mild and efficient method to prepare HSi- or HOSi-telechelic, high-molecular-weight polydimethylsiloxane polymers (to 41,600 g·mol-1) using the one-shot hydrolysis of MHMH is reported; titration of the water allowed for higher molecular weights (to 153,900 g·mol-1). The "living" character of the chain extension processes was demonstrated by adding a small portion of MHMH and B(C6F5)3 (BCF) to a first formed polymer, which led to a ~2-fold, second growth in molecular weight. The heterogeneous reaction reached completion in less than 30 min, much less in some cases, regardless of whether it was performed neat or 50 wt% in dry toluene; homogeneous reactions in toluene were much slower. The process does not involve traditional redistribution, as judged by the low quantities (<3%) of D4 produced. However, it is not possible to avoid Chojnowski metathesis from MHDDMH giving D3, which occurs competitively with chain extension.
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29
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Saito K, Ito T, Arata S, Sunada Y. Four‐Coordinated Manganese(II) Disilyl Complexes for the Hydrosilylation of Aldehydes and Ketones with 1,1,3,3‐Tetramethyldisiloxane. ChemCatChem 2020. [DOI: 10.1002/cctc.202001522] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Kyoka Saito
- Department of Applied Chemistry Faculty of Science and Engineering Chuo University 1-13-27 Kasuga Bunkyo-ku Tokyo Japan
| | - Tatsuyoshi Ito
- Kanagawa Institute of Industrial Science and Technology (KISTEC) 4-6-1 Komaba Meguro-ku Tokyo Japan
| | - Shogo Arata
- Department of Applied Chemistry School of Engineering The University of Tokyo 4-6-1 Komaba Meguro-ku Tokyo Japan
| | - Yusuke Sunada
- Department of Applied Chemistry School of Engineering The University of Tokyo 4-6-1 Komaba Meguro-ku Tokyo Japan
- Institute of Industrial Science The University of Tokyo 4-6-1 Komaba Meguro-ku Tokyo Japan
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30
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Gao Y, Yang S, Huo Y, Hu X. Recent Progress on Reductive Coupling of Nitroarenes by Using Organosilanes as Convenient Reductants. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000370] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yang Gao
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 People's Republic of China
| | - Simin Yang
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 People's Republic of China
| | - Yanping Huo
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 People's Republic of China
| | - Xiao‐Qiang Hu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science School of Chemistry and Materials Science South-Central University for Nationalities Wuhan 430074 People's Republic of China
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31
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Affiliation(s)
- Manisha Tripathy
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
| | - Christoph Schneider
- Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
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32
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Reductive cyanation of organic chlorides using CO 2 and NH 3 via Triphos-Ni(I) species. Nat Commun 2020; 11:4096. [PMID: 32796845 PMCID: PMC7428002 DOI: 10.1038/s41467-020-17939-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 07/27/2020] [Indexed: 11/11/2022] Open
Abstract
Cyano-containing compounds constitute important pharmaceuticals, agrochemicals and organic materials. Traditional cyanation methods often rely on the use of toxic metal cyanides which have serious disposal, storage and transportation issues. Therefore, there is an increasing need to develop general and efficient catalytic methods for cyanide-free production of nitriles. Here we report the reductive cyanation of organic chlorides using CO2/NH3 as the electrophilic CN source. The use of tridentate phosphine ligand Triphos allows for the nickel-catalyzed cyanation of a broad array of aryl and aliphatic chlorides to produce the desired nitrile products in good yields, and with excellent functional group tolerance. Cheap and bench-stable urea was also shown as suitable CN source, suggesting promising application potential. Mechanistic studies imply that Triphos-Ni(I) species are responsible for the reductive C-C coupling approach involving isocyanate intermediates. This method expands the application potential of reductive cyanation in the synthesis of functionalized nitrile compounds under cyanide-free conditions, which is valuable for safe synthesis of (isotope-labeled) drugs. Nitriles are key intermediates in production of pharmaceuticals, agrochemicals and organic materials. Here, the authors report a nickel-catalyzed reductive cyanation of organic chlorides with CO2/NH3 and urea as cyanation reagents to afford a broad range of organic nitriles.
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33
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Matheau-Raven D, Gabriel P, Leitch JA, Almehmadi YA, Yamazaki K, Dixon DJ. Catalytic Reductive Functionalization of Tertiary Amides using Vaska’s Complex: Synthesis of Complex Tertiary Amine Building Blocks and Natural Products. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02377] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Daniel Matheau-Raven
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Pablo Gabriel
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Jamie A. Leitch
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Yaseen A. Almehmadi
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Ken Yamazaki
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Darren J. Dixon
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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34
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Link A, Zhou Y, Buchwald SL. CuH-Catalyzed Asymmetric Reductive Amidation of α,β-Unsaturated Carboxylic Acids. Org Lett 2020; 22:5666-5670. [PMID: 32628019 DOI: 10.1021/acs.orglett.0c02064] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The direct enantioselective copper hydride (CuH)-catalyzed synthesis of β-chiral amides from α,β-unsaturated carboxylic acids and secondary amines under mild reaction conditions is reported. The method utilizes readily accessible carboxylic acids and tolerates a variety of functional groups in the β-position including several heteroarenes. A subsequent iridium-catalyzed reduction to γ-chiral amines can be performed in the same flask without purification of the intermediate amides.
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Affiliation(s)
- Achim Link
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yujing Zhou
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Stephen L Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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35
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Santos CBR, Santos KLB, Cruz JN, Leite FHA, Borges RS, Taft CA, Campos JM, Silva CHTP. Molecular modeling approaches of selective adenosine receptor type 2A agonists as potential anti-inflammatory drugs. J Biomol Struct Dyn 2020; 39:3115-3127. [PMID: 32338151 DOI: 10.1080/07391102.2020.1761878] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Adenosine A2A receptor (A2AR) is the predominant receptor in immune cells, where its activation triggers cAMP-mediated immunosuppressive signaling and the underlying inhibition of T cells activation and T cells-induced effects mediated by cAMP-dependent kinase proteins mechanisms. In this study, were used ADME/Tox, molecular docking and molecular dynamics simulations to investigate selective adenosine A2AR agonists as potential anti-inflammatory drugs. As a result, we obtained two promising compounds (A and B) that have satisfactory pharmacokinetic and toxicological properties and were able to interact with important residues of the A2AR binding cavity and during the molecular dynamics simulations were able to keep the enzyme complexed.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Cleydson B R Santos
- Graduate Program in Biotechnology and Biodiversity-Network BIONORTE, Federal University of Amapá, Macapá, Brazil.,Laboratory of Modeling and Computational Chemistry, Department of Biological Sciences and Health, Federal University of Amapá, Macapá, Brazil.,Graduate Program in Medicinal Chemistry and Molecular Modeling, Institute of Health Sciences, Federal University of Pará, Belém, Brazil.,Computational Laboratory of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Kelton L B Santos
- Graduate Program in Biotechnology and Biodiversity-Network BIONORTE, Federal University of Amapá, Macapá, Brazil.,Laboratory of Modeling and Computational Chemistry, Department of Biological Sciences and Health, Federal University of Amapá, Macapá, Brazil.,Graduate Program in Medicinal Chemistry and Molecular Modeling, Institute of Health Sciences, Federal University of Pará, Belém, Brazil
| | - Jorddy N Cruz
- Laboratory of Modeling and Computational Chemistry, Department of Biological Sciences and Health, Federal University of Amapá, Macapá, Brazil
| | - Franco H A Leite
- Laboratory of Molecular Modeling, State University of Feira de Santana, Feira de Santana-Bahia, Brazil
| | - Rosivaldo S Borges
- Graduate Program in Medicinal Chemistry and Molecular Modeling, Institute of Health Sciences, Federal University of Pará, Belém, Brazil
| | - Carlton A Taft
- Brazilian Center for Physical Research, Rio de Janeiro, Brazil
| | - Joaquín M Campos
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Biosanitary Institute of Granada (Ibs.GRANADA), Campus of Cartuja, University of Granada, Granada, Spain
| | - Carlos H T P Silva
- Computational Laboratory of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.,Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto-SP, Brazil
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36
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Cook A, Prakash S, Zheng YL, Newman SG. Exhaustive Reduction of Esters Enabled by Nickel Catalysis. J Am Chem Soc 2020; 142:8109-8115. [PMID: 32319766 DOI: 10.1021/jacs.0c02405] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report a one-step procedure to directly reduce unactivated aryl esters into their corresponding tolyl derivatives. This is achieved by an organosilane-mediated ester hydrosilylation reaction and subsequent Ni/NHC-catalyzed hydrogenolysis. The resulting conditions provide a direct and efficient alternative to multi-step procedures for this transformation that often require the use of hazardous metal hydrides. Applications in the synthesis of -CD3-containing products, derivatization of bioactive molecules, and chemoselective reduction in the presence of other C-O bonds are demonstrated.
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Affiliation(s)
- Adam Cook
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Sekar Prakash
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Yan-Long Zheng
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Stephen G Newman
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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37
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Wu LJ, Yang LF, Li JH, Wang QA. Dicarbonylative benzannulation of 3-acetoxy-1,4-enynes with CO and silylboranes by Pd and Cu cooperative catalysis: one-step access to 3-hydroxyarylacylsilanes. Chem Commun (Camb) 2020; 56:1669-1672. [PMID: 31939456 DOI: 10.1039/c9cc09077k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A new, general Pd/Cu-cocatalysed dicarbonylative benzannulation of 3-acetoxy-1,4-enynes with CO and silylboranes is described. The method utilizes CO as both a one-carbon (C1) unit and an external addition functional reagent to achieve an unprecedented dicarbonylative benzannulation process, and represents a facile, efficient route to 3-hydroxyarylacylsilanes. Mechanistically, the silyl-Cu intermediate formed from CuF2 and silylboranes, and silyl-Pd intermediate generated by transmetallation are two key factors for successfully targeting the reaction and selectivity.
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Affiliation(s)
- Li-Jun Wu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.
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38
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Tahara A, Nagashima H. Recent topics of iridium-catalyzed hydrosilylation of tertiary amides to silylhemiaminals. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151423] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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39
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Gabriel P, Gregory AW, Dixon DJ. Iridium-Catalyzed Aza-Spirocyclization of Indole-Tethered Amides: An Interrupted Pictet–Spengler Reaction. Org Lett 2019; 21:6658-6662. [DOI: 10.1021/acs.orglett.9b02194] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pablo Gabriel
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Alex W. Gregory
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Darren J. Dixon
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
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40
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Sousa SCA, Carrasco CJ, Pinto MF, Royo B. A Manganese N‐Heterocyclic Carbene Catalyst for Reduction of Sulfoxides with Silanes. ChemCatChem 2019. [DOI: 10.1002/cctc.201900662] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Sara C. A. Sousa
- ITQB NOVA, Instituto de Tecnologia Química e BiológicaUniversidade Nova de Lisboa Av. da República 2780-157 Oeiras Portugal
| | - Carlos J. Carrasco
- ITQB NOVA, Instituto de Tecnologia Química e BiológicaUniversidade Nova de Lisboa Av. da República 2780-157 Oeiras Portugal
| | - Mara F. Pinto
- ITQB NOVA, Instituto de Tecnologia Química e BiológicaUniversidade Nova de Lisboa Av. da República 2780-157 Oeiras Portugal
| | - Beatriz Royo
- ITQB NOVA, Instituto de Tecnologia Química e BiológicaUniversidade Nova de Lisboa Av. da República 2780-157 Oeiras Portugal
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41
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Shaikh NS. Sustainable Amine Synthesis: Iron Catalyzed Reactions of Hydrosilanes with Imines, Amides, Nitroarenes and Nitriles. ChemistrySelect 2019. [DOI: 10.1002/slct.201900460] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nadim S. Shaikh
- Department of Chemistry Eurofins Advinus Ltd., 21 & 22, Phase II, Peenya Industrial State Bengaluru 560058 India
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42
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43
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Raya-Barón Á, Oña-Burgos P, Fernández I. Iron-Catalyzed Homogeneous Hydrosilylation of Ketones and Aldehydes: Advances and Mechanistic Perspective. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00201] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Álvaro Raya-Barón
- Department of Chemistry and Physics, Research Centre CIAIMBITAL, University of Almería, Ctra. Sacramento, s/n, Almería E-04120, Spain
| | - Pascual Oña-Burgos
- Department of Chemistry and Physics, Research Centre CIAIMBITAL, University of Almería, Ctra. Sacramento, s/n, Almería E-04120, Spain
| | - Ignacio Fernández
- Department of Chemistry and Physics, Research Centre CIAIMBITAL, University of Almería, Ctra. Sacramento, s/n, Almería E-04120, Spain
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44
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Maity R, Das B, Das I. Transition‐Metal‐Free Reduction of
α
‐Keto Thioesters with Hydrosilanes at Room Temperature: Divergent Synthesis through Reagent‐Controlled Chemoselectivities. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900222] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Rajib Maity
- Organic and Medicinal Chemistry DivisionCSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
| | - Bhanuranjan Das
- Organic and Medicinal Chemistry DivisionCSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
| | - Indrajit Das
- Organic and Medicinal Chemistry DivisionCSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700032 India
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45
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Frogneux X, Pesesse A, Delacroix S, Ribot F, Carenco S. Radical‐Initiated Dismutation of Hydrosiloxanes by Catalytic Potassium‐Graphite. ChemCatChem 2019. [DOI: 10.1002/cctc.201900172] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xavier Frogneux
- Sorbonne Université, CNRS, Collège de France Laboratoire de Chimie de la Matière Condensée de Paris 4 Place Jussieu F-75005 Paris France
- Collège de FrancePSL University, CNRS Laboratoire de Chimie de la Matière Condensée de Paris 11 Place Marcelin Berthelot Paris France
| | - Antoine Pesesse
- Sorbonne Université, CNRS, Collège de France Laboratoire de Chimie de la Matière Condensée de Paris 4 Place Jussieu F-75005 Paris France
| | - Simon Delacroix
- Sorbonne Université, CNRS, Collège de France Laboratoire de Chimie de la Matière Condensée de Paris 4 Place Jussieu F-75005 Paris France
| | - François Ribot
- Sorbonne Université, CNRS, Collège de France Laboratoire de Chimie de la Matière Condensée de Paris 4 Place Jussieu F-75005 Paris France
| | - Sophie Carenco
- Sorbonne Université, CNRS, Collège de France Laboratoire de Chimie de la Matière Condensée de Paris 4 Place Jussieu F-75005 Paris France
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46
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Ong DY, Yen Z, Yoshii A, Revillo Imbernon J, Takita R, Chiba S. Controlled Reduction of Carboxamides to Alcohols or Amines by Zinc Hydrides. Angew Chem Int Ed Engl 2019; 58:4992-4997. [DOI: 10.1002/anie.201900233] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/09/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Zhihao Yen
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Asami Yoshii
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Julia Revillo Imbernon
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Ryo Takita
- Graduate School of Pharmaceutical SciencesThe University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
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47
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Ong DY, Yen Z, Yoshii A, Revillo Imbernon J, Takita R, Chiba S. Controlled Reduction of Carboxamides to Alcohols or Amines by Zinc Hydrides. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Zhihao Yen
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Asami Yoshii
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Julia Revillo Imbernon
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Ryo Takita
- Graduate School of Pharmaceutical SciencesThe University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
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48
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Une Y, Tahara A, Miyamoto Y, Sunada Y, Nagashima H. Iridium-PPh3 Catalysts for Conversion of Amides to Enamines. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00835] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
| | | | | | - Yusuke Sunada
- Institute of Industrial Science, The University of Tokyo, Komaba 4-6-1, Meguro, Tokyo 153-8505, Japan
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49
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Macaulay CM, Ogawa T, McDonald R, Sydora OL, Stradiotto M, Turculet L. A comparative analysis of hydrosilative amide reduction catalyzed by first-row transition metal (Mn, Fe, Co, and Ni) N-phosphinoamidinate complexes. Dalton Trans 2019; 48:9581-9587. [DOI: 10.1039/c8dt04221g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Screening reveals (PN)Ni(x) pre-catalysts to be effective for the hydrosilative reduction of amides under mild conditions.
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Affiliation(s)
| | - Takahiko Ogawa
- Department of Chemistry
- Dalhousie University
- Halifax
- Canada
| | - Robert McDonald
- X-Ray Crystallography Laboratory
- Department of Chemistry
- University of Alberta
- Edmonton
- Canada
| | - Orson L. Sydora
- Research and Technology
- Chevron Phillips Chemical Company LP
- Kingwood
- USA
| | | | - Laura Turculet
- Department of Chemistry
- Dalhousie University
- Halifax
- Canada
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50
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Shankar R, Sharma A, Jangir B, Chaudhary M, Kociok-Köhn G. Catalytic oxidation of diorganosilanes to 1,1,3,3-tetraorganodisiloxanes with gold nanoparticle assembly at the water–chloroform interface. NEW J CHEM 2019. [DOI: 10.1039/c8nj04223c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The synthesis of 1,1,3,3-tetraorganodisiloxanes from the hydrolytic oxidation of diorganosilanes, RR1SiH2, using AuNPs as an interfacial catalyst is described. This study provides a manifestation of the photothermal effect in enhancing the catalytic activity at ambient temperature.
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Affiliation(s)
- Ravi Shankar
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
| | - Asmita Sharma
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
| | - Bhawana Jangir
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
| | - Manchal Chaudhary
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
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