1
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Dey K, de Ruiter G. Chemoselective Hydrogenation of α,β-Unsaturated Ketones Catalyzed by a Manganese(I) Hydride Complex. Org Lett 2024; 26:4173-4177. [PMID: 38738936 PMCID: PMC11129310 DOI: 10.1021/acs.orglett.4c00277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 04/21/2024] [Accepted: 05/07/2024] [Indexed: 05/14/2024]
Abstract
Here, we report the chemoselective hydrogenation of α,β-unsaturated ketones catalyzed by a well-defined Mn(I) PCNHCP pincer complex [(PCNHCP)Mn(CO)2H] (1). The reaction is compatible with a wide variety of functional groups that include halides, esters, amides, nitriles, nitro, alkynes, and alkenes, and for most substrates occurs readily at ambient hydrogen pressure (1-2 bar). Mechanistic studies and deuterium labeling experiments reveal a non-cooperative mechanism, which is further discussed in this report.
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Affiliation(s)
- Kartick Dey
- Schulich
Faculty of Chemistry, Technion −
Israel Institute of Technology, Technion City, 3200008 Haifa, Israel
| | - Graham de Ruiter
- Schulich
Faculty of Chemistry, Technion −
Israel Institute of Technology, Technion City, 3200008 Haifa, Israel
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2
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Duran Arroyo V, Arevalo R. Tandem manganese catalysis for the chemo-, regio-, and stereoselective hydroboration of terminal alkynes: in situ precatalyst activation as a key to enhanced chemoselectivity. RSC Adv 2024; 14:5514-5523. [PMID: 38352676 PMCID: PMC10863604 DOI: 10.1039/d3ra08747f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 02/05/2024] [Indexed: 02/16/2024] Open
Abstract
The manganese(ii) complex [Mn(iPrPNP)Cl2] (iPrPNP = 2,6-bis(diisopropylphosphinomethyl)pyridine) was found to catalyze the stereo- and regioselective hydroboration of terminal alkynes employing HBPin (pinacolborane). In the absence of in situ activators, mixtures of alkynylboronate and E-alkenylboronate esters were formed, whereas when NaHBEt3 was employed as the in situ activator, E-alkenylboronate esters were exclusively accessed. Mechanistic studies revealed a tandem C-H borylation/semihydrogenation pathway accounting for the formation of the products. Stoichiometric reactions hint toward reaction of a Mn-H active species with the terminal alkyne as the catalyst entry pathway to the cycle, whereas reaction with HBPin led to catalyst deactivation.
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Affiliation(s)
- Victor Duran Arroyo
- Department of Chemistry and Biochemistry, University of California 5200 North Lake Road 95343 Merced California USA
| | - Rebeca Arevalo
- Department of Chemistry and Biochemistry, University of California 5200 North Lake Road 95343 Merced California USA
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3
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Das K, Kundu A, Sarkar K, Adhikari D, Maji B. Catalytic acceptorless dehydrogenative borylation of styrenes enabled by a molecularly defined manganese complex. Chem Sci 2024; 15:1098-1105. [PMID: 38239678 PMCID: PMC10793603 DOI: 10.1039/d3sc05523j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 12/09/2023] [Indexed: 01/22/2024] Open
Abstract
In this study, we employed a 3d metal complex as a catalyst to synthesize alkenyl boronate esters through the dehydrogenative coupling of styrenes and pinacolborane. The process generates hydrogen gas as the sole byproduct without requiring an acceptor, rendering it environmentally friendly and atom-efficient. This methodology demonstrated exceptional selectivity for dehydrogenative borylation over direct hydroboration. Additionally, it exhibited a preference for borylating aromatic alkenes over aliphatic ones. Notably, derivatives of natural products and bioactive molecules successfully underwent diversification using this approach. The alkenyl boronate esters served as precursors for the synthesis of various pharmaceuticals and potential anticancer agents. Our research involved comprehensive experimental and computational studies to elucidate the reaction pathway, highlighting the B-H bond cleavage as the rate-determining step. The catalyst's success was attributed to the hemilability and metal-ligand bifunctionality of the ligand backbone.
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Affiliation(s)
- Kuhali Das
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata Mohanpur 741246 India
| | - Abhishek Kundu
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali SAS Nagar 140306 India
| | - Koushik Sarkar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata Mohanpur 741246 India
| | - Debashis Adhikari
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali SAS Nagar 140306 India
| | - Biplab Maji
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata Mohanpur 741246 India
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4
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Behera RR, Saha R, Kumar AA, Sethi S, Jana NC, Bagh B. Hydrosilylation of Terminal Alkynes Catalyzed by an Air-Stable Manganese-NHC Complex. J Org Chem 2023. [PMID: 37317486 DOI: 10.1021/acs.joc.3c00127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In recent years, catalysis with base metal manganese has received a significant amount of interest. Catalysis with manganese complexes having N-heterocyclic carbenes (NHCs) is relatively underdeveloped in comparison to the extensively investigated manganese catalysts possessing pincer ligands (particularly phosphine-based ligands). Herein, we describe the synthesis of two imidazolium salts decorated with picolyl arms (L1 and L2) as NHC precursors. Facile coordination of L1 and L2 with MnBr(CO)5 in the presence of a base resulted in the formation manganese(I)-NHC complexes (1 and 2) as an air-stable solid in good isolated yield. Single-crystal X-ray analysis revealed the structure of the cationic complexes [Mn(CO)3(NHC)][PF6] with tridentate N,C,N binding of the NHC ligand in a facile fashion. Along with a few known manganese(I) complexes, these Mn(I)-NHC complexes 1 and 2 were tested for the hydrosilylation of terminal alkynes. Complex 1 was proved to be an effective catalyst for the hydrosilylation of terminal alkynes with good selectivity toward the less thermodynamically stable β-(Z)-vinylsilanes. This method provided good regioselectivity (anti-Markovnikov addition) and stereoselectivity (β-(Z)-product). Experimental evidence suggested that the present hydrosilylation pathway involved an organometallic mechanism with manganese(I)-silyl species as a possible reactive intermediate.
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Affiliation(s)
- Rakesh R Behera
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - Ratnakar Saha
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - Alamsaty Ashis Kumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - Subrat Sethi
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - Narayan Ch Jana
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - Bidraha Bagh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
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5
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Almutairi N, Vijjamarri S, Du G. Manganese Salan Complexes as Catalysts for Hydrosilylation of Aldehydes and Ketones. Catalysts 2023. [DOI: 10.3390/catal13040665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023] Open
Abstract
Manganese has attracted significant recent attention due to its abundance, low toxicity, and versatility in catalysis. In the present study, a series of manganese (III) complexes supported by salan ligands have been synthesized and characterized, and their activity as catalysts in the hydrosilylation of carbonyl compounds was examined. While manganese (III) chloride complexes exhibited minimal catalytic efficacy without activation of silver perchlorate, manganese (III) azide complexes showed good activity in the hydrosilylation of carbonyl compounds. Under optimized reaction conditions, several types of aldehydes and ketones could be reduced with good yields and tolerance to a variety of functional groups. The possible mechanisms of silane activation and hydrosilylation were discussed in light of relevant experimental observations.
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6
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Leland BE, Mondal J, Trovitch RJ. Sustainable preparation of aminosilane monomers, oligomers, and polymers through Si-N dehydrocoupling catalysis. Chem Commun (Camb) 2023; 59:3665-3684. [PMID: 36857645 DOI: 10.1039/d2cc07092h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
This article covers historical and recent efforts to catalyse the dehydrocoupling of amines and silanes, a direct method for Si-N bond formation that offers hydrogen as a byproduct. In some applications, this transformation can be used as a sustainable replacement for traditional aminosilane synthesis, which demands corrosive chlorosilanes while generating one equivalent of ammonium salt waste for each Si-N bond that is formed. These advantages have driven the development of Si-N dehydrocoupling catalysts that span the periodic table, affording mechanistic insight that has led to advances in efficiency and selectivity. Given the divergence in precursors being used, characterization methods being relied on, and applications being targeted, this article highlights the formation of monomeric aminosilanes separately from oligomeric and polymeric aminosilanes. A recent study that allowed for the manganese catalysed synthesis of perhydropolysilazane and commercial chemical vapor deposition precursors is featured, and key opportunities for advancing the field of Si-N dehydrocoupling catalysis are discussed.
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Affiliation(s)
- Brock E Leland
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA.
| | - Joydeb Mondal
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA.
| | - Ryan J Trovitch
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA.
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7
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Rennie BE, Price JS, Emslie DJH, Morris RH. Trans Ligand Determines the Stability of Paramagnetic Manganese(II) Hydrides of the Type trans-[MnH(L)(dmpe) 2] + Where L is PMe 3, C 2H 4, or CO. Inorg Chem 2023; 62:8123-8135. [PMID: 36812512 DOI: 10.1021/acs.inorgchem.2c04432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Paramagnetic metal hydride (PMH) complexes play important roles in catalytic applications and bioinorganic chemistry. 3d PMH chemistry has largely focused on Ti, Mn, Fe, and Co. Various MnII PMHs have been proposed as intermediates in catalysis, but isolated MnII PMHs are limited to dimeric high-spin MnII structures with bridging hydrides. In this paper, a series of the first low-spin monomeric MnII PMH complexes are generated by chemical oxidation of their MnI analogues. This series is of the type trans-[MnH(L)(dmpe)2]+/0 where the trans ligand L is PMe3, C2H4, or CO [dmpe is 1,2-bis(dimethylphosphino)ethane], and the thermal stability of the MnII hydride complexes was found to be strongly dependent on the identity of the trans ligand. When L is PMe3, the complex is the first example of an isolated monomeric MnII hydride complex. In contrast, when L is C2H4 or CO, the complexes are only stable at low temperatures; upon warming to room temperature, the former decomposed to afford [Mn(dmpe)3]+, accompanied by ethane and ethylene, whereas the latter eliminated H2, generating [Mn(MeCN)(CO)(dmpe)2]+ or a mixture of products including [Mn(κ1-PF6)(CO)(dmpe)2], depending on the reaction conditions. All PMHs were characterized by low-temperature electron paramagnetic resonance (EPR) spectroscopy, and stable [MnH(PMe3)(dmpe)2]+ was further characterized by UV-vis and IR spectroscopy, Superconducting Quantum Interference Device magnetometry, and single-crystal X-ray diffraction. Noteworthy spectral properties are the significant EPR superhyperfine coupling to the hydride (∼85 MHz) and an increase (+33 cm-1) in the Mn-H IR stretch upon oxidation. Density functional theory calculations were also employed to gain insights into the acidity and bond strengths of the complexes. MnII-H bond dissociation free energies are estimated to decrease in the series of complexes from 60 (L = PMe3) to 47 kcal/mol (L = CO).
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Affiliation(s)
- Benjamin E Rennie
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S3H6, Canada
| | - Jeffrey S Price
- Department of Chemistry, McMaster University, Hamilton, Ontario L8S4M1, Canada
| | - David J H Emslie
- Department of Chemistry, McMaster University, Hamilton, Ontario L8S4M1, Canada
| | - Robert H Morris
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S3H6, Canada
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8
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Torres-Calis A, García JJ. Homogeneous Manganese-Catalyzed Hydrofunctionalizations of Alkenes and Alkynes: Catalytic and Mechanistic Tendencies. ACS OMEGA 2022; 7:37008-37038. [PMID: 36312376 PMCID: PMC9608411 DOI: 10.1021/acsomega.2c05109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
In recent years, many manganese-based homogeneous catalytic precursors have been developed as powerful alternatives in organic synthesis. Among these, the hydrofunctionalizations of unsaturated C-C bonds correspond to outstanding ways to afford compounds with more versatile functional groups, which are commonly used as building blocks in the production of fine chemicals and feedstock for the industrial field. Herein, we present an account of the Mn-catalyzed homogeneous hydrofunctionalizations of alkenes and alkynes with the main objective of finding catalytic and mechanistic tendencies that could serve as a platform for the works to come.
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9
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Jameei Moghaddam N, Gil-Sepulcre M, Wang JW, Benet-Buchholz J, Gimbert-Suriñach C, Llobet A. Interplay between β-Diimino and β-Diketiminato Ligands in Nickel Complexes Active in the Proton Reduction Reaction. Inorg Chem 2022; 61:16639-16649. [PMID: 36196853 PMCID: PMC9597662 DOI: 10.1021/acs.inorgchem.2c02150] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two Ni complexes are reported with κ4-P2N2 β-diimino (BDI) ligands with the general formula [Ni(XBDI)](BF4)2, where BDI is N-(2-(diphenylphosphaneyl)ethyl)-4-((2-(diphenylphosphaneyl)ethyl)imino)pent-2-en-2-amine and X indicates the substituent in the α-carbon intradiimine position, X = H for 1(BF4)2 and X = Ph for 2(BF4)2. Electrochemical analysis together with UV-vis and NMR spectroscopy in acetonitrile and dimethylformamide (DMF) indicates the conversion of the β-diimino complexes 12+ and 22+ to the negatively charged β-diketiminato (BDK) analogues (1-H)+ and (2-H)+ via deprotonation in DMF. Moreover, further electrochemical and spectroscopy evidence indicates that the one-electron-reduced derivatives 1+ and 2+ can also rapidly evolve to the BDK (1-H)+ and (2-H)+, respectively, via hydrogen gas evolution through a bimolecular homolytic pathway. Finally, both complexes are demonstrated to be active for the proton reduction reaction in DMF at Eapp = -1.8 V vs Fc+/0, being the active species the one-electron-reduced derivative 1-H and 2-H.
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Affiliation(s)
- Navid Jameei Moghaddam
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avda. Països Catalans 16, 43007Tarragona, Spain.,Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo s/n, 43007Tarragona, Spain
| | - Marcos Gil-Sepulcre
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avda. Països Catalans 16, 43007Tarragona, Spain
| | - Jia-Wei Wang
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avda. Països Catalans 16, 43007Tarragona, Spain
| | - Jordi Benet-Buchholz
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avda. Països Catalans 16, 43007Tarragona, Spain
| | - Carolina Gimbert-Suriñach
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avda. Països Catalans 16, 43007Tarragona, Spain.,Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193Barcelona, Spain
| | - Antoni Llobet
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avda. Països Catalans 16, 43007Tarragona, Spain.,Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193Barcelona, Spain
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10
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Chang ASM, Kawamura KE, Henness HS, Salpino VM, Greene JC, Zakharov LN, Cook AK. (NHC)Ni(0)-Catalyzed Branched-Selective Alkene Hydrosilylation with Secondary and Tertiary Silanes. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Alison Sy-min Chang
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Kiana E. Kawamura
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Hayden S. Henness
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Victor M. Salpino
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Jack C. Greene
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Lev N. Zakharov
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
| | - Amanda K. Cook
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403, United States
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11
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Unexpected results of the reactions of manganese and vanadium β-diketiminate halide complexes with Na[HBEt3]. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3549-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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12
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Das K, Waiba S, Jana A, Maji B. Manganese-catalyzed hydrogenation, dehydrogenation, and hydroelementation reactions. Chem Soc Rev 2022; 51:4386-4464. [PMID: 35583150 DOI: 10.1039/d2cs00093h] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The emerging field of organometallic catalysis has shifted towards research on Earth-abundant transition metals due to their ready availability, economic advantage, and novel properties. In this case, manganese, the third most abundant transition-metal in the Earth's crust, has emerged as one of the leading competitors. Accordingly, a large number of molecularly-defined Mn-complexes has been synthesized and employed for hydrogenation, dehydrogenation, and hydroelementation reactions. In this regard, catalyst design is based on three pillars, namely, metal-ligand bifunctionality, ligand hemilability, and redox activity. Indeed, the developed catalysts not only differ in the number of chelating atoms they possess but also their working principles, thereby leading to different turnover numbers for product molecules. Hence, the critical assessment of molecularly defined manganese catalysts in terms of chelating atoms, reaction conditions, mechanistic pathway, and product turnover number is significant. Herein, we analyze manganese complexes for their catalytic activity, versatility to allow multiple transformations and their routes to convert substrates to target molecules. This article will also be helpful to get significant insight into ligand design, thereby aiding catalysis design.
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Affiliation(s)
- Kuhali Das
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, India.
| | - Satyadeep Waiba
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, India.
| | - Akash Jana
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, India.
| | - Biplab Maji
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, India.
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13
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Towards ligand simplification in manganese-catalyzed hydrogenation and hydrosilylation processes. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214421] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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14
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Yang W, Fan Q, Yang H, Sun H, Li X. [P, C] Chelate Cobalt(I)-Catalyzed Distinct Selective Hydrosilylation of Alkenes under Mild Conditions. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wenjing Yang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People’s Republic of China
| | - Qingqing Fan
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People’s Republic of China
| | - Haiquan Yang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People’s Republic of China
| | - Hongjian Sun
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People’s Republic of China
| | - Xiaoyan Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People’s Republic of China
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15
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Abstract
AbstractRecent developments in manganese-catalyzed reducing transformations—hydrosilylation, hydroboration, hydrogenation, and transfer hydrogenation—are reviewed herein. Over the past half a decade (i.e., 2016 to the present), more than 115 research publications have been reported in these fields. Novel organometallic compounds and new reduction transformations have been discovered and further developed. Significant challenges that had historically acted as barriers for the use of manganese catalysts in reduction reactions are slowly being broken down. This review will hopefully assist in developing this research area, by presenting a clear and concise overview of the catalyst structures and substrate transformations published so far.1 Introduction2 Hydrosilylation3 Hydroboration4 Hydrogenation5 Transfer Hydrogenation6 Conclusion and Perspective
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Affiliation(s)
- Christophe Werlé
- Max Planck Institute for Chemical Energy Conversion
- Ruhr University Bochum
| | - Peter Schlichter
- Max Planck Institute for Chemical Energy Conversion
- Institut für Technische und Makromolekulare Chemie (ITMC), RWTH Aachen University
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16
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Elsby MR, Oh C, Son M, Kim SYH, Baik MH, Baker RT. Spin-state crossover in photo-catalyzed nitrile dihydroboration via Mn-thiolate cooperation. Chem Sci 2022; 13:12550-12559. [DOI: 10.1039/d2sc04339d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 09/30/2022] [Indexed: 11/21/2022] Open
Abstract
The role of a phosphine-free SNS-pincer ligand in metal–ligand cooperative hydroboration catalysis was investigated. The bifunctional thiolate donor and spin-state change to high-spin Mn are crucial to accessing low-energy activation barriers.
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Affiliation(s)
- Matthew R. Elsby
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Changjin Oh
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Mina Son
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Scott Y. H. Kim
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Mu-Hyun Baik
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - R. Tom Baker
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
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17
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Afonin MY, Sedelnikova AY, Konokhova AY, Sukhikh TS, Konchenko SN. STRUCTURE AND COMPOSITION OF [(nacnac)MnCl]2 (nacnac = HC(C(Me)N(2.6-i-Pr2C6H3))2) PRODUCTS REDUCED BY POTASSIUM-INTERCALATED GRAPHITE IN TOLUENE AND BENZENE. J STRUCT CHEM+ 2021. [DOI: 10.1134/s0022476621100139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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T MS, Mondal T. Radiation curable polysiloxane: synthesis to applications. SOFT MATTER 2021; 17:6284-6297. [PMID: 34160540 DOI: 10.1039/d1sm00269d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Among the different types of specialty polymers, polysiloxane finds its position in the pyramid's apex in terms of its performance attributes. Its unique structural features result in it having superior performance benefits over wide operational conditions. Hence, polysiloxanes are used in various industries. Like other polymers, to effectively use polysiloxanes, curing is a non-negotiable fact. Therefore, polysiloxanes are cured using different chemistries such as addition, condensation, and peroxy-mediated methods, etc. However, recently, it has been noted that there is a strong impetus towards developing radiation-curable polysiloxanes. A faster turnover time, higher yield, and marginal involvement in the release of any toxic by-products has resulted in the widespread acceptance of radiation curing techniques. This review article provides insight into the various facets of polysiloxane chemistry, the synthesis of radiation curable polysiloxane, and the curing methodology of polysiloxane using radiation sources such as ultraviolet, electron beam, and gamma radiation. We further provide an account of the various applications of such radiation-curable polysiloxanes.
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Affiliation(s)
- Muthamil Selvan T
- Rubber Technology Centre, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.
| | - Titash Mondal
- Rubber Technology Centre, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.
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19
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Weber S, Iebed D, Glatz M, Kirchner K. Reduction of carbonyl compounds via hydrosilylation catalyzed by well-defined PNP-Mn(I) hydride complexes. MONATSHEFTE FUR CHEMIE 2021. [DOI: 10.1007/s00706-021-02774-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AbstractReduction reactions of unsaturated compounds are fundamental transformations in synthetic chemistry. In this context, the reduction of polarized double bonds such as carbonyl or C=C motifs can be achieved by hydrogenation reactions. We describe here a highly chemoselective Mn(I)-based PNP pincer catalyst for the hydrosilylation of aldehydes and ketones employing polymethylhydrosiloxane (PMHS) as inexpensive hydrogen donor.
Graphic abstract
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20
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Manganese-catalysed divergent silylation of alkenes. Nat Chem 2021; 13:182-190. [PMID: 33318674 DOI: 10.1038/s41557-020-00589-8] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 10/21/2020] [Indexed: 01/30/2023]
Abstract
Transition-metal-catalysed, redox-neutral dehydrosilylation of alkenes is a long-standing challenge in organic synthesis, with current methods suffering from low selectivity and narrow scope. In this study, we report a general and simple method for the manganese-catalysed dehydrosilylation and hydrosilylation of alkenes, with Mn2(CO)10 as a catalyst precursor, by using a ligand-tuned metalloradical reactivity strategy. This enables versatility and controllable selectivity with a 1:1 ratio of alkenes and silanes, and the synthetic robustness and practicality of this method are demonstrated using complex alkenes and light olefins. The selectivity of the reaction has been studied using density functional theory calculations, showing the use of an iPrPNP ligand to favour dehydrosilylation, while a JackiePhos ligand favours hydrosilylation. The reaction is redox-neutral and atom-economical, exhibits a broad substrate scope and excellent functional group tolerance, and is suitable for various synthetic applications on a gram scale.
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21
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de Almeida LD, Wang H, Junge K, Cui X, Beller M. Recent Advances in Catalytic Hydrosilylations: Developments beyond Traditional Platinum Catalysts. Angew Chem Int Ed Engl 2021; 60:550-565. [PMID: 32668079 PMCID: PMC7839722 DOI: 10.1002/anie.202008729] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Indexed: 12/26/2022]
Abstract
Hydrosilylation reactions, which allow the addition of Si-H to C=C/C≡C bonds, are typically catalyzed by homogeneous noble metal catalysts (Pt, Rh, Ir, and Ru). Although excellent activity and selectivity can be obtained, the price, purification, and metal residues of these precious catalysts are problems in the silicone industry. Thus, a strong interest in more sustainable catalysts and for more economic processes exists. In this respect, recently disclosed hydrosilylations using catalysts based on earth-abundant transition metals, for example, Fe, Co, Ni, and Mn, and heterogeneous catalysts (supported nanoparticles and single-atom sites) are noteworthy. This minireview describes the recent advances in this field.
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Affiliation(s)
| | - Hongli Wang
- State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesNo. 18, Tianshui Middle RoadLanzhou730000China
| | - Kathrin Junge
- Leibniz-Institute for CatalysisAlbert-Einstein-Str. 29a18059RostockGermany
| | - Xinjiang Cui
- State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesNo. 18, Tianshui Middle RoadLanzhou730000China
| | - Matthias Beller
- Leibniz-Institute for CatalysisAlbert-Einstein-Str. 29a18059RostockGermany
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22
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Jakoobi M, Vivien A, Camp C, Thieuleux C. Co 2(CO) 8 and unsaturated epoxides as unexpected partners in generating functionalized siloxane oils and cross-linked materials. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00920f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The unexpected formation of cross-linked silicon materials was observed via hydrosilylation of unsaturated epoxides with polymethylhydrosiloxane using Co2(CO)8 as a catalyst.
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Affiliation(s)
- Martin Jakoobi
- Laboratory of Catalysis, Polymerization, Processes and Materials
- CP2M UMR 5128 CNRS-UCB Lyon 1-CPE Lyon
- Université de Lyon, Institut de Chimie de Lyon
- F-69616 Villeurbanne
- France
| | - Anthony Vivien
- Laboratory of Catalysis, Polymerization, Processes and Materials
- CP2M UMR 5128 CNRS-UCB Lyon 1-CPE Lyon
- Université de Lyon, Institut de Chimie de Lyon
- F-69616 Villeurbanne
- France
| | - Clément Camp
- Laboratory of Catalysis, Polymerization, Processes and Materials
- CP2M UMR 5128 CNRS-UCB Lyon 1-CPE Lyon
- Université de Lyon, Institut de Chimie de Lyon
- F-69616 Villeurbanne
- France
| | - Chloé Thieuleux
- Laboratory of Catalysis, Polymerization, Processes and Materials
- CP2M UMR 5128 CNRS-UCB Lyon 1-CPE Lyon
- Université de Lyon, Institut de Chimie de Lyon
- F-69616 Villeurbanne
- France
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23
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Jakoobi M, Dardun V, Camp C, Thieuleux C. Co 2(CO) 8 as an efficient catalyst for the synthesis of functionalized polymethylhydrosiloxane oils and unconventional cross-linked materials. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00191d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Co2(CO)8 was found to be an effective and structurally simple catalyst for the functionalization of polymethylhydrosiloxane into functional silicone fluids using terminal alkenes and into cross-linked silicone materials using unconventional tethers.
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Affiliation(s)
- Martin Jakoobi
- Laboratory of Catalysis, Polymerization, Processes and Materials
- CP2M UMR 5128 CNRS-UCB Lyon 1-CPE Lyon
- Université de Lyon
- Institut de Chimie de Lyon
- F-69616 Villeurbanne
| | - Vincent Dardun
- Laboratory of Catalysis, Polymerization, Processes and Materials
- CP2M UMR 5128 CNRS-UCB Lyon 1-CPE Lyon
- Université de Lyon
- Institut de Chimie de Lyon
- F-69616 Villeurbanne
| | - Clément Camp
- Laboratory of Catalysis, Polymerization, Processes and Materials
- CP2M UMR 5128 CNRS-UCB Lyon 1-CPE Lyon
- Université de Lyon
- Institut de Chimie de Lyon
- F-69616 Villeurbanne
| | - Chloé Thieuleux
- Laboratory of Catalysis, Polymerization, Processes and Materials
- CP2M UMR 5128 CNRS-UCB Lyon 1-CPE Lyon
- Université de Lyon
- Institut de Chimie de Lyon
- F-69616 Villeurbanne
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24
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Komine N, Mitsui T, Kikuchi S, Hirano M. Ligand-Controlled Regiodivergent Hydrosilylation of Conjugated Dienes Catalyzed by Mono(phosphine)palladium(0) Complexes. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00597] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Nobuyuki Komine
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Tatsuo Mitsui
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Shu Kikuchi
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Masafumi Hirano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
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25
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Almeida LD, Wang H, Junge K, Cui X, Beller M. Recent Advances in Catalytic Hydrosilylations: Developments beyond Traditional Platinum Catalysts. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008729] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | - Hongli Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences No. 18, Tianshui Middle Road Lanzhou 730000 China
| | - Kathrin Junge
- Leibniz-Institute for Catalysis Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Xinjiang Cui
- State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences No. 18, Tianshui Middle Road Lanzhou 730000 China
| | - Matthias Beller
- Leibniz-Institute for Catalysis Albert-Einstein-Str. 29a 18059 Rostock Germany
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26
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Oh C, Siewe J, Nguyen TT, Kawamura A, Flores M, Groy TL, Anderson JS, Trovitch RJ, Baik MH. The electronic structure of a β-diketiminate manganese hydride dimer. Dalton Trans 2020; 49:14463-14474. [PMID: 33034607 DOI: 10.1039/d0dt02842h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The electronic structure of a dimeric manganese hydride catalyst supported by β-diketiminate ligands, [(2,6-iPr2PhBDI)Mn(μ-H)]2, was investigated with density functional theory. A triple bond between the manganese centres was anticipated from simple electron-counting rules; however, calculations revealed Mn-Mn Mayer bond orders of 0.21 and 0.27 for the ferromagnetically-coupled and antiferromagnetically-coupled extremes, respectively. In accordance with experimentally determined Heisenberg exchange coupling constants of -15 ± 0.1 cm-1 (SQUID) and -10.2 ± 0.7 cm-1 (EPR), the calculated J0 value of -10.9 cm-1 confirmed that the ground state involves antiferromagnetic coupling between high spin Mn(ii)-d5 centres. The effect of steric bulk on the bond order was examined via a model study with the least sterically-demanding version of the β-diketiminate ligand and was found to be negligible. Mixing between metal- and β-diketiminate-based orbitals was found to be responsible for the absence of a metal-metal multiple bond. The bridging hydrides give rise to a relatively close positioning of the metal centres, while bridging atoms possessing 2p orbitals result in longer Mn-Mn distances and more stable dimers. The synthesis and characterization of the bridging hydroxide variant, [(2,6-iPr2PhBDI)Mn(μ-OH)]2, provides experimental support for these assessments.
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Affiliation(s)
- Changjin Oh
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea. and Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Joëlle Siewe
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea and Department of Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Thao T Nguyen
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287, USA
| | - Airi Kawamura
- Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA
| | - Marco Flores
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287, USA
| | - Thomas L Groy
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287, USA
| | - John S Anderson
- Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA
| | - Ryan J Trovitch
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287, USA
| | - Mu-Hyun Baik
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea. and Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
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27
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Casey KC, Appiah JK, Robinson JR. Low-Symmetry β-Diketimine Aryloxide Rare-Earth Complexes: Flexible, Reactive, and Selective. Inorg Chem 2020; 59:14827-14837. [PMID: 32986427 DOI: 10.1021/acs.inorgchem.0c02170] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report the synthesis, characterization, and reactivity of a new low-symmetry β-diketimine featuring a pendant amino(methyl)phenol donor and its corresponding heteroleptic rare-earth (RE) complexes. This includes the first structurally characterized examples of alcoholysis and insertion from an isolated REIII amide in a β-diketimine framework. The flexible methylene linkage leads to REIII complexes with tunable dynamic solution behavior that defines their stoichiometric and catalytic reactivity. The addition of a strong neutral donor ligand, tricyclohexylphosphine oxide, suppresses a prevalent catalyst degradation pathway (base-promoted elimination) and dramatically enhances the catalyst performance in the stereospecific ring-opening polymerization of rac-β-butyrolactone. Our results further demonstrate the importance of ligand reorganization in the stoichiometric and catalytic activity of REIII ions.
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Affiliation(s)
- Kerry C Casey
- Department of Chemistry, Brown University, 324 Brook Street, Providence, Rhode Island 02912, United States
| | - Jude K Appiah
- Department of Chemistry, Brown University, 324 Brook Street, Providence, Rhode Island 02912, United States
| | - Jerome R Robinson
- Department of Chemistry, Brown University, 324 Brook Street, Providence, Rhode Island 02912, United States
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28
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Wang D, He Y, Dai H, Huang C, Yuan X, Xie J. Manganese‐Catalyzed
Hydrocarbofunctionalization of Internal Alkenes
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000376] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Dongping Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing Jiangsu 210023 China
| | - Yijie He
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing Jiangsu 210023 China
| | - Haotian Dai
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing Jiangsu 210023 China
| | - Congcong Huang
- School of Chemistry and Chemical Engineering, Qufu Normal University Qufu Shandong 273165 China
| | - Xiang‐Ai Yuan
- School of Chemistry and Chemical Engineering, Qufu Normal University Qufu Shandong 273165 China
| | - Jin Xie
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University Nanjing Jiangsu 210023 China
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29
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Vijjamarri S, O’Denius TM, Yao B, Kubátová A, Du G. Highly Selective Hydroboration of Carbonyls by a Manganese Catalyst: Insight into the Reaction Mechanism. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00448] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Srikanth Vijjamarri
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
| | - Timothy M. O’Denius
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
| | - Bin Yao
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
| | - Alena Kubátová
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
| | - Guodong Du
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
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30
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Xie S, Li X, Sun H, Fuhr O, Fenske D. [CNC]-Pincer Cobalt Hydride Catalyzed Distinct Selective Hydrosilylation of Aryl Alkene and Alkyl Alkene. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00251] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Shangqing Xie
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan, Shandong 250100, People’s Republic of China
| | - Xiaoyan Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan, Shandong 250100, People’s Republic of China
| | - Hongjian Sun
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan, Shandong 250100, People’s Republic of China
| | - Olaf Fuhr
- Institut für Nanotechnologie (INT) und Karlsruher Nano-Micro-Facility (KNMF), Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen 76344, Germany
| | - Dieter Fenske
- Institut für Nanotechnologie (INT) und Karlsruher Nano-Micro-Facility (KNMF), Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen 76344, Germany
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31
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Wu S, Zhang Y, Jiang H, Ding N, Wang Y, Su Q, Zhang H, Wu L, Yang Q. Manganese catalyzed dehydrogenative silylation of alkenes: Direct access to allylsilanes. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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32
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Arata S, Suzuki K, Yamaguchi K, Sunada Y. Supersilyl as an effective monodentate ligand to stabilize four-coordinate manganese( ii) complexes. Dalton Trans 2020; 49:17537-17541. [DOI: 10.1039/d0dt03837g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Supersilyl, –Si(SiMe3)3, serves as an effective ligand to afford a series of four-coordinate manganese(ii) complexes.
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Affiliation(s)
- Shogo Arata
- Department of Applied Chemistry
- School of Engineering
- The University of Tokyo
- Tokyo 153-8505
- Japan
| | - Kosuke Suzuki
- Department of Applied Chemistry
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - Kazuya Yamaguchi
- Department of Applied Chemistry
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - Yusuke Sunada
- Department of Applied Chemistry
- School of Engineering
- The University of Tokyo
- Tokyo 153-8505
- Japan
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33
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Nguyen TT, Kim JH, Kim S, Oh C, Flores M, Groy TL, Baik MH, Trovitch RJ. Scope and mechanism of nitrile dihydroboration mediated by a β-diketiminate manganese hydride catalyst. Chem Commun (Camb) 2020; 56:3959-3962. [DOI: 10.1039/c9cc09921b] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Nitrile insertion allows for manganese-catalyzed nitrile dihydroboration at 80 °C.
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Affiliation(s)
- Thao T. Nguyen
- School of Molecular Sciences
- Arizona State University
- Tempe
- USA
| | - Jun-Hyeong Kim
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations
| | - Suyeon Kim
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations
| | - Changjin Oh
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations
| | - Marco Flores
- School of Molecular Sciences
- Arizona State University
- Tempe
- USA
| | - Thomas L. Groy
- School of Molecular Sciences
- Arizona State University
- Tempe
- USA
| | - Mu-Hyun Baik
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations
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34
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Nowicki M, Zaranek M, Pawluć P, Hoffmann M. DFT study of trialkylborohydride-catalysed hydrosilylation of alkenes – the mechanism and its implications. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02261a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A detailed DFT study reveals the mechanism of trialkylborohydride-catalysed Markovnikov hydrosilylation of aromatic alkenes.
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Affiliation(s)
- Mateusz Nowicki
- Laboratory of Quantum Chemistry
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań
- Poland
| | - Maciej Zaranek
- Center for Advanced Technology
- Adam Mickiewicz University in Poznań
- 61-614 Poznań
- Poland
- Department of Organometallic Chemistry
| | - Piotr Pawluć
- Center for Advanced Technology
- Adam Mickiewicz University in Poznań
- 61-614 Poznań
- Poland
- Department of Organometallic Chemistry
| | - Marcin Hoffmann
- Laboratory of Quantum Chemistry
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań
- Poland
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35
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Zhang G, Zeng H, Li S, Johnson J, Mo Z, Neary MC, Zheng S. 1-D manganese(ii)-terpyridine coordination polymers as precatalysts for hydrofunctionalisation of carbonyl compounds. Dalton Trans 2020; 49:2610-2615. [PMID: 32037438 DOI: 10.1039/c9dt04637b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient hydroboration and hydrosilylation of ketones and aldehydes has been achieved using a MnII-coordination polymer as precatalyst under mild conditions.
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Affiliation(s)
- Guoqi Zhang
- Department of Sciences
- John Jay College and Ph.D. Program in Chemistry
- The Graduate Center of the City University of New York
- New York
- USA
| | - Haisu Zeng
- Department of Sciences
- John Jay College and Ph.D. Program in Chemistry
- The Graduate Center of the City University of New York
- New York
- USA
| | - Sihan Li
- Department of Sciences
- John Jay College and Ph.D. Program in Chemistry
- The Graduate Center of the City University of New York
- New York
- USA
| | - Jahvon Johnson
- Department of Sciences
- John Jay College and Ph.D. Program in Chemistry
- The Graduate Center of the City University of New York
- New York
- USA
| | - Zixuan Mo
- Department of Sciences
- John Jay College and Ph.D. Program in Chemistry
- The Graduate Center of the City University of New York
- New York
- USA
| | - Michelle C. Neary
- Department of Chemistry
- Hunter College
- the City University of New York
- New York
- USA
| | - Shengping Zheng
- Department of Chemistry
- Hunter College
- the City University of New York
- New York
- USA
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36
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Kobayashi K, Taguchi D, Moriuchi T, Nakazawa H. Chemoselective Hydrosilylation of Olefin/Ketone Catalyzed by Iminobipyridine Fe and Co complexes. ChemCatChem 2019. [DOI: 10.1002/cctc.201901717] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Katsuaki Kobayashi
- Department of Chemistry Graduate School of ScienceOsaka City University Sumiyoshi-ku Osaka 558-8585 Japan
| | - Daisuke Taguchi
- Department of Chemistry Graduate School of ScienceOsaka City University Sumiyoshi-ku Osaka 558-8585 Japan
| | - Toshiyuki Moriuchi
- Department of Chemistry Graduate School of ScienceOsaka City University Sumiyoshi-ku Osaka 558-8585 Japan
| | - Hiroshi Nakazawa
- Department of Chemistry Graduate School of ScienceOsaka City University Sumiyoshi-ku Osaka 558-8585 Japan
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Price JS, Emslie DJH. Interconversion and reactivity of manganese silyl, silylene, and silene complexes. Chem Sci 2019; 10:10853-10869. [PMID: 32206252 PMCID: PMC7069235 DOI: 10.1039/c9sc04513a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 10/23/2019] [Indexed: 01/10/2023] Open
Abstract
Interconversions between manganese silylene and silene complexes are reported, including those involving the first spectroscopically observed silene complexes with an SiH substituent, and their involvement in ethylene hydrosilylation is discussed.
Manganese disilyl hydride complexes [(dmpe)2MnH(SiH2R)2] (4Ph: R = Ph, 4Bu: R = nBu) reacted with ethylene to form silene hydride complexes [(dmpe)2MnH(RHSi
Created by potrace 1.16, written by Peter Selinger 2001-2019
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CHMe)] (6Ph,H: R = Ph, 6Bu,H: R = nBu). Compounds 6R,H reacted with a second equivalent of ethylene to generate [(dmpe)2MnH(REtSi
Created by potrace 1.16, written by Peter Selinger 2001-2019
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CHMe)] (6Ph,Et: R = Ph, 6Bu,Et: R = nBu), resulting from apparent ethylene insertion into the silene Si–H bond. Furthermore, in the absence of ethylene, silene complex 6Bu,H slowly isomerized to the silylene hydride complex [(dmpe)2MnH(
Created by potrace 1.16, written by Peter Selinger 2001-2019
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SiEtnBu)] (3Bu,Et). Reactions of 4R with ethylene likely proceed via low-coordinate silyl {[(dmpe)2Mn(SiH2R)] (2Ph: R = Ph, 2Bu: R = nBu)} or silylene hydride {[(dmpe)2MnH(
Created by potrace 1.16, written by Peter Selinger 2001-2019
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SiHR)] (3Ph,H: R = Ph, 3Bu,H: R = nBu)} intermediates accessed from 4R by H3SiR elimination. DFT calculations and high temperature NMR spectra support the accessibility of these intermediates, and reactions of 4R with isonitriles or N-heterocyclic carbenes yielded the silyl isonitrile complexes [(dmpe)2Mn(SiH2R)(CNR′)] (7a–d: R = Ph or nBu; R′ = o-xylyl or tBu), and NHC-stabilized silylene hydride complexes [(dmpe)2MnH{
Created by potrace 1.16, written by Peter Selinger 2001-2019
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SiHR(NHC)}] (8a–d: R = Ph or nBu; NHC = 1,3-diisopropylimidazolin-2-ylidene or 1,3,4,5-tetramethyl-4-imidazolin-2-ylidene), respectively, all of which were crystallographically characterized. Silyl, silylene and silene complexes in this work were accessed via reactions of [(dmpe)2MnH(C2H4)] (1) with hydrosilanes, in some cases followed by ethylene. Therefore, ethylene (C2H4 and C2D4) hydrosilylation was investigated using [(dmpe)2MnH(C2H4)] (1) as a pre-catalyst, resulting in stepwise conversion of primary to secondary to tertiary hydrosilanes. Various catalytically active manganese-containing species were observed during catalysis, including silylene and silene complexes, and a catalytic cycle is proposed.
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Affiliation(s)
- Jeffrey S Price
- Department of Chemistry , McMaster University , 1280 Main Street West , Hamilton , Ontario L8S 4M1 , Canada .
| | - David J H Emslie
- Department of Chemistry , McMaster University , 1280 Main Street West , Hamilton , Ontario L8S 4M1 , Canada .
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Fritz-Langhals E. Silicon(II) Cation Cp*Si:+ X–: A New Class of Efficient Catalysts in Organosilicon Chemistry. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00260] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Elke Fritz-Langhals
- WACKER Chemie AG, Consortium, Zielstattstraße 20-22, D-81379 Munich, Germany
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Ghaffari B, Mendes‐Burak J, Chan KW, Copéret C. Silica‐Supported MnIISites as Efficient Catalysts for Carbonyl Hydroboration, Hydrosilylation, and Transesterification. Chemistry 2019; 25:13869-13873. [DOI: 10.1002/chem.201903638] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Behnaz Ghaffari
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Jorge Mendes‐Burak
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Ka Wing Chan
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied BiosciencesETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
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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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Moreno da Costa D, Borja L, Verdugo C, Martinez J, Quintero C, Jaque P, Trofymchuk OS, Daniliuc CG, Cabrera AR, Rojas RS. Unexpected intramolecular N-arylcyano-β-diketiminate cyclization in new aminoquinoline derivative complexes of aluminium for CO2 fixation into cyclic carbonates. NEW J CHEM 2019. [DOI: 10.1039/c9nj02499a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
exo-Dig intramolecular cyclization of β-diketiminates allowed to obtain 4-amino-3-iminoquinolines ligands through a novel pathway. Al(III) complexes bearing these ligands where active towards the synthesis of cyclic carbonates from epoxides and CO2.
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Affiliation(s)
- David Moreno da Costa
- Departamento de Química Inorgánica
- Facultad de Química y de Farmacia
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Luis Borja
- Departamento de Química Inorgánica
- Facultad de Química y de Farmacia
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Camilo Verdugo
- Departamento de Química Inorgánica
- Facultad de Química y de Farmacia
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Javier Martinez
- Departamento de Química Inorgánica
- Facultad de Química y de Farmacia
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Celso Quintero
- Departamento de Química Inorgánica
- Facultad de Química y de Farmacia
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Pablo Jaque
- Departamento de Química Orgánica y Fisicoquímica
- Facultad de Ciencias Químicas y Farmacéuticas
- Universidad de Chile
- Santiago
- Chile
| | | | | | - Alan R. Cabrera
- Departamento de Química Inorgánica
- Facultad de Química y de Farmacia
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Rene S. Rojas
- Departamento de Química Inorgánica
- Facultad de Química y de Farmacia
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
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Rock CL, Trovitch RJ. Anti-Markovnikov terminal and gem-olefin hydrosilylation using a κ4-diimine nickel catalyst: selectivity for alkene hydrosilylation over ether C–O bond cleavage. Dalton Trans 2019; 48:461-467. [DOI: 10.1039/c8dt04608e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The hydrosilylation of terminal alkenes, allyl ethers, and gem-olefins has been demonstrated using (Ph2PPrDI)Ni between 25 and 70 °C.
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Affiliation(s)
- Maciej Zaranek
- Faculty of Chemistry and the Center for Advanced Technology, Adam Mickiewicz University in Poznań, Umultowska 89 B/C, 61-614 Poznań, Poland
| | - Piotr Pawluc
- Faculty of Chemistry and the Center for Advanced Technology, Adam Mickiewicz University in Poznań, Umultowska 89 B/C, 61-614 Poznań, Poland
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