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Mondal A, Pal D, Phukan HJ, Roy M, Kumar S, Purkayastha S, Guha AK, Srimani D. Manganese Complex Catalyzed Sequential Multi-component Reaction: Enroute to a Quinoline-Derived Azafluorenes. CHEMSUSCHEM 2024; 17:e202301138. [PMID: 38096176 DOI: 10.1002/cssc.202301138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 11/06/2023] [Indexed: 01/09/2024]
Abstract
The development of innovative synthetic strategies for constructing complex molecular structures is the heart of organic chemistry. This significance of novel reactions or reaction sequences would further enhance if they permitted the synthesis of new classes of structural motifs, which have not been previously created. The research on the synthesis of heterocyclic compounds is one of the most active topics in organic chemistry due to the widespread application of N-heterocycles in life and material science. The development of a new catalytic process that employs first-row transition metals to produce a range of heterocycles from renewable raw materials is considered highly sustainable approach. This would be more advantageous if done in an eco-friendly and atom-efficient manner. Herein we introduce, the synthesis of various new quinoline based azafluorenes via sequential dehydrogenative multicomponent reaction (MCR) followed by C(sp3)-H hydroxylation and annulation. Our newly developed, Mn-complexes have the ability to direct the reaction in order to achieve a high amount of desired functionalized heterocycles while minimizing the possibility of multiple side reactions. We also performed a series of control experiments, hydride trapping experiments, reaction kinetics, catalytic intermediate and DFT studies to comprehend the detailed reaction route and the catalyst's function in the MCR sequence.
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Affiliation(s)
- Avijit Mondal
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
| | - Debjyoti Pal
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
| | - Hirak Jyoti Phukan
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
| | - Mithu Roy
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
| | - Saurabh Kumar
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
| | | | - Ankur Kanti Guha
- Advanced Computational Chemistry Centre, Cotton University, Guwahati, 781001, India
| | - Dipankar Srimani
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam, 781039, India
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2
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Dellisanti A, Chessa E, Porcheddu A, Carraro M, Pisano L, De Luca L, Gaspa S. Visible Light-Promoted Oxidative Cross-Coupling of Alcohols to Esters. Molecules 2024; 29:570. [PMID: 38338315 PMCID: PMC10856673 DOI: 10.3390/molecules29030570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/16/2024] [Accepted: 01/19/2024] [Indexed: 02/12/2024] Open
Abstract
Ester is one of the most significant functional groups in organic chemistry and is enclosed in several valued molecules. Usually, esters are prepared through the acid-catalyzed esterification reaction of carboxylic acids with alcohols, transesterification of esters with alcohols, or via activation of carboxylic acids followed by the addition of alcohols. However, these procedures typically imply the excess use of reactants and harsh reaction conditions. Visible light-mediated photoreactions have been disclosed to display a safe, sustainable, and accessible alternative to traditional methods, and to lead new reactivity modes in organic procedures. In this context, we propose a transition metal-based and organic-based photocatalyst-free synthesis of esters from alcohols induced by visible light. The methodology can be carried out using sunlight or artificial visible light as a solar simulator or a blue LED source.
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Affiliation(s)
- Andrea Dellisanti
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
| | - Elisa Chessa
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
| | - Andrea Porcheddu
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Sudi di Cagliari, 09042 Monserrato, Italy;
| | - Massimo Carraro
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
| | - Luisa Pisano
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
| | - Lidia De Luca
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
| | - Silvia Gaspa
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
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3
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Mukherjee A, Datta S, Richmond MG, Bhattacharya S. Ruthenium complexes of 1,4-diazabutadiene ligands with a cis-RuCl 2 moiety for catalytic acceptorless dehydrogenation of alcohols: DFT evidence of chemically non-innocent ligand participation. RSC Adv 2023; 13:25660-25672. [PMID: 37649575 PMCID: PMC10463240 DOI: 10.1039/d3ra04750d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 08/07/2023] [Indexed: 09/01/2023] Open
Abstract
The acceptorless dehydrogenative coupling (ADC) of primary alcohols to esters by diazabutadiene-coordinated ruthenium compounds is reported. Treatment of cis-Ru(dmso)4Cl2 in acetone at 56 °C with different 1,4-diazabutadienes [p-XC6H4N[double bond, length as m-dash]C(H)(H)C[double bond, length as m-dash]NC6H4X-p; X = H, CH3, OCH3, and Cl; abbreviated as DAB-X], gives trans-Ru[κ2-N,N-DAB-X]2Cl2 as the kinetic product of substitution. Heating these products in o-xylene at 144 °C gives the thermodynamically favored cis-Ru[κ2-N,N-DAB-X]2Cl2 isomers. Electronic structure calculations confirm the greater stability of the cis diastereomer. The molecular structures for each pair of geometric isomers have been determined by X-ray diffraction analyses. Cyclic voltammetry experiments on the complexes show an oxidative response and a reductive response within 0.50 to 0.93 V and -0.76 to -1.24 V vs. SCE respectively. The cis-Ru[κ2-N,N-DAB-X]2Cl2 complexes function as catalyst precursors for the acceptorless dehydrogenative coupling of primary alcohols to H2 and homo- and cross-coupled esters. When 1,4-butanediol and 1,5-pentanediol are employed as substrates, lactones and hydroxyaldehydes are produced as the major dehydrogenation products, while secondary alcohols afforded ketones in excellent yields. The mechanism for the dehydrogenation of benzyl alcohol to benzyl benzoate and H2 using cis-Ru[κ2-N,N-DAB-H]2Cl2 (cis-1) as a catalyst precursor was investigated by DFT calculations. The data support a catalytic cycle that involves the four-coordinate species Ru[κ2-N,N-DAB-H][κ1-N-DAB-H](κ1-OCH2Ph) whose protonated κ1-diazabutadiene moiety functions as a chemically non-innocent ligand that facilitates a β-hydrogen elimination from the κ1-O-benzoxide ligand to give the corresponding hydride HRu[κ2-N,N-DAB-H][κ1-N-DAB-H](κ2-O,C-benzaldehyde). H2 production follows a Noyori-type elimination to give (H2)Ru[κ2-N,N-DAB-H][κ1-N-DAB-H](κ1-O-benzaldehyde) as an intermediate in the catalytic cycle.
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Affiliation(s)
- Aparajita Mukherjee
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University Kolkata 700 032 India
| | - Sayanti Datta
- Department of Chemistry, Brainware University Kolkata 700 125 India
| | | | - Samaresh Bhattacharya
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University Kolkata 700 032 India
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4
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Tang J, He J, Zhao SY, Liu W. Manganese-Catalyzed Chemoselective Coupling of Secondary Alcohols, Primary Alcohols and Methanol. Angew Chem Int Ed Engl 2023; 62:e202215882. [PMID: 36847452 DOI: 10.1002/anie.202215882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 02/22/2023] [Accepted: 02/27/2023] [Indexed: 03/01/2023]
Abstract
Herein, we report a manganese-catalyzed three-component coupling of secondary alcohols, primary alcohols and methanol for the synthesis of β,β-methylated/alkylated secondary alcohols. Using our method, a series of 1-arylethanol, benzyl alcohol derivatives, and methanol undergo sequential coupling efficiently to construct assembled alcohols with high chemoselectivity in moderate to good yields. Mechanistic studies suggest that the reaction proceeds via methylation of a benzylated secondary alcohol intermediate to generate the final product.
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Affiliation(s)
- Jun Tang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, China
| | - Jingxi He
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, China
| | - Sheng-Yin Zhao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, China
| | - Weiping Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, China
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5
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Tran BL, Erickson JD, Speelman AL, Bullock RM. Mechanistic Studies of Carbonyl Allylation Mediated by (NHC)CuH: Isoprene Insertion, Allylation, and β-Hydride Elimination. Inorg Chem 2023; 62:342-352. [PMID: 36525336 DOI: 10.1021/acs.inorgchem.2c03402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The ability of Cu-H complexes to undergo selective insertion of unsaturated hydrocarbons under mild conditions has rendered them valuable, versatile catalysts. The direct formation of Cu allyl intermediates from unfunctionalized 1,3-dienes and transient Cu hydrides is an appealing strategy for upgrading conjugated diene feedstocks. However, empirical mechanistic studies of the underlying elementary steps and characterization of key intermediates in Cu-H catalysis are sparse. Using [(NHC)CuH]2 (NHC = N-heterocyclic carbene), we examined the steric effects of NHC ligands on two key elementary steps of CuH-catalyzed carbonyl allylation: the insertion of a diene into the Cu-H bond to produce a Cu-allyl complex, and the formation of C-C bonds from stoichiometric allylations of ketones and aldehydes. The resulting allyl and homoallylic alkoxide complexes have been characterized by NMR spectroscopy and single-crystal X-ray diffraction. Employing isolable (NHC)Cu-allyl complexes, we further evaluated the roles of the ligand size, electronic properties of carbonyl substrates, coordinating groups within the substrate, and solvent on the regioselectivity, diastereoselectivity, and relative rate of the C-C bond formation step. In contrast to the clean allylation of ketones, allylation of aldehydes provided a rare example of a formal β-hydride elimination reaction from a secondary homoallylic alkoxide species. Mechanistic studies of key elementary steps provide insights for a range of catalytic reactions of dienes mediated by hydride complexes.
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Affiliation(s)
- Ba L Tran
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Jeremy D Erickson
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Amy L Speelman
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - R Morris Bullock
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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6
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Anandaraj P, Ramesh R, Malecki JG. Direct Synthesis of Benzimidazoles by Pd(II) N^N^S-Pincer Type Complexes via Acceptorless Dehydrogenative Coupling of Alcohols with Diamines. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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7
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Onoda M, Fujita K. Dehydrogenative Esterification and Dehydrative Etherification by Coupling of Primary Alcohols Based on Catalytic Function Switching of an Iridium Complex. ChemistrySelect 2022. [DOI: 10.1002/slct.202201135] [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)
- Mitsuki Onoda
- Graduate School of Human and Environmental Studies Kyoto University Sakyo-ku Kyoto 606-8501 Japan
| | - Ken‐ichi Fujita
- Graduate School of Human and Environmental Studies Kyoto University Sakyo-ku Kyoto 606-8501 Japan
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8
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Tabasi NS, Genç S, Gülcemal D. Tuning the selectivity in iridium-catalyzed acceptorless dehydrogenative coupling of primary alcohols. Org Biomol Chem 2022; 20:6582-6592. [PMID: 35913502 DOI: 10.1039/d2ob01142e] [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
An acceptorless dehydrogenative coupling of primary alcohols to carboxylic acids/carboxylates, esters, and Guerbet alcohols (via both homo- and cross-β-alkylation of the alcohols) in the presence of an N-heterocyclic carbene iridium(I) catalyst was developed under aerobic conditions. The product selectivity can be easily tuned among the products with a single catalyst through simple modification of the reaction conditions, such as the catalyst and base amounts, the choice of base, and the reaction temperature.
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Affiliation(s)
- Nihal S Tabasi
- Ege University, Chemistry Department, 35100 Bornova, Izmir, Turkey.
| | - Sertaç Genç
- Ege University, Chemistry Department, 35100 Bornova, Izmir, Turkey.
| | - Derya Gülcemal
- Ege University, Chemistry Department, 35100 Bornova, Izmir, Turkey.
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9
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Amrutha S, Radhika S, Anilkumar G. Recent developments and trends in the iron- and cobalt-catalyzed Sonogashira reactions. Beilstein J Org Chem 2022; 18:262-285. [PMID: 35330777 PMCID: PMC8919418 DOI: 10.3762/bjoc.18.31] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 02/24/2022] [Indexed: 01/04/2023] Open
Abstract
Iron- and cobalt-catalyzed Sonogashira coupling reactions are becoming central areas of research in organic synthesis. Owing to their significant importance in the formation of carbon–carbon bonds, numerous green and nanoparticle protocols have emerged during the past decades. The non-toxic and inexpensive nature of catalysts gained much attention in recent times. In this context, their catalytic nature and activity in Sonogashira coupling reactions were well explored and compared. Most importantly, one of the highlights of this review is the emphasis given to green strategies. This is the first review on iron- and cobalt-catalyzed Sonogashira coupling reactions which comprehends literature up to 2020.
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Affiliation(s)
- Surendran Amrutha
- Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560, India
| | - Sankaran Radhika
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560, India
| | - Gopinathan Anilkumar
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560, India
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10
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Kar S, Luo J, Rauch M, Diskin-Posner Y, Ben-David Y, Milstein D. Dehydrogenative ester synthesis from enol ethers and water with a ruthenium complex catalyzing two reactions in synergy. GREEN CHEMISTRY : AN INTERNATIONAL JOURNAL AND GREEN CHEMISTRY RESOURCE : GC 2022; 24:1481-1487. [PMID: 35308195 PMCID: PMC8860191 DOI: 10.1039/d1gc04574a] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
We report the dehydrogenative synthesis of esters from enol ethers using water as the formal oxidant, catalyzed by a newly developed ruthenium acridine-based PNP(Ph)-type complex. Mechanistic experiments and density functional theory (DFT) studies suggest that an inner-sphere stepwise coupled reaction pathway is operational instead of a more intuitive outer-sphere tandem hydration-dehydrogenation pathway.
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Affiliation(s)
- Sayan Kar
- Department of Molecular Chemistry and Materials Science, The Weizmann Institute of Science Rehovot 76100 Israel
| | - Jie Luo
- Department of Molecular Chemistry and Materials Science, The Weizmann Institute of Science Rehovot 76100 Israel
| | - Michael Rauch
- Department of Molecular Chemistry and Materials Science, The Weizmann Institute of Science Rehovot 76100 Israel
| | - Yael Diskin-Posner
- Department of Chemical Research Support, The Weizmann Institute of Science Rehovot 76100 Israel
| | - Yehoshoa Ben-David
- Department of Molecular Chemistry and Materials Science, The Weizmann Institute of Science Rehovot 76100 Israel
| | - David Milstein
- Department of Molecular Chemistry and Materials Science, The Weizmann Institute of Science Rehovot 76100 Israel
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11
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Borthakur I, Sau A, Kundu S. Cobalt-catalyzed dehydrogenative functionalization of alcohols: Progress and future prospect. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214257] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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12
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Koller S, Klein P, Reinhardt K, Ochmann L, Seitz A, Jandl C, Pöthig A, Hintermann L. New Access Routes to Privileged and Chiral Ligands for Transition‐Metal Catalyzed Hydrogen Autotransfer (Borrowing Hydrogen), Dehydrogenative Condensation, and Alkene Isomerization Reactions. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Sebastian Koller
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Philippe Klein
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Katja Reinhardt
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Lukas Ochmann
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Antonia Seitz
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Christian Jandl
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Alexander Pöthig
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
| | - Lukas Hintermann
- Department Chemie Technische Universität München Lichtenbergstraße 4 DE-85748 Garching bei München Germany
- TUM Catalysis Research Center Ernst-Otto-Fischer-Straße 1 DE-85748 Garching bei München Germany
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13
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Paudel K, Xu S, Ding K. Switchable Cobalt-Catalyzed α-Olefination and α-Alkylation of Nitriles with Primary Alcohols. Org Lett 2021; 23:5028-5032. [PMID: 34143638 DOI: 10.1021/acs.orglett.1c01553] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first switchable α-olefination and α-alkylation of nitriles with primary alcohols catalyzed by a well-defined base transition-metal Co complex was presented. A broad variety of nitriles and primary alcohols are selectively and efficiently converted to the corresponding products by this method. It is noteworthy that the transformation is environmentally benign and atom efficient with H2 and H2O being the sole byproducts.
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Affiliation(s)
- Keshav Paudel
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States.,Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Shi Xu
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Keying Ding
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States.,Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
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14
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Sodium organoaluminate containing bidentate pyrrolyl ligand: Synthesis, structure, and catalytic activity for the Tishchenko reaction. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Pandey B, Xu S, Ding K. Switchable β-alkylation of Secondary Alcohols with Primary Alcohols by a Well-Defined Cobalt Catalyst. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00147] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bedraj Pandey
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Shi Xu
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Keying Ding
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
- Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
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16
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Rauch M, Luo J, Avram L, Ben-David Y, Milstein D. Mechanistic Investigations of Ruthenium Catalyzed Dehydrogenative Thioester Synthesis and Thioester Hydrogenation. ACS Catal 2021; 11:2795-2807. [PMID: 33763290 PMCID: PMC7976608 DOI: 10.1021/acscatal.1c00418] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/03/2021] [Indexed: 12/12/2022]
Abstract
![]()
We have recently reported the previously
unknown synthesis of thioesters
by coupling thiols and alcohols (or aldehydes) with liberation of
H2, as well as the reverse hydrogenation of thioesters,
catalyzed by a well-defined ruthenium acridine-9H based pincer complex.
These reactions are highly selective and are not deactivated by the
strongly coordinating thiols. Herein, the mechanism of this reversible
transformation is investigated in detail by a combined experimental
and computational (DFT) approach. We elucidate the likely pathway
of the reactions, and demonstrate experimentally how hydrogen gas
pressure governs selectivity toward hydrogenation or dehydrogenation.
With respect to the dehydrogenative process, we discuss a competing
mechanism for ester formation, which despite being thermodynamically
preferable, it is kinetically inhibited due to the relatively high
acidity of thiol compared to alcohol and, accordingly, the substantial
difference in the relative stabilities of a ruthenium thiolate intermediate
as opposed to a ruthenium alkoxide intermediate. Accordingly, various
additional reaction pathways were considered and are discussed herein,
including the dehydrogenative coupling of alcohol to ester and the
Tischenko reaction coupling aldehyde to ester. This study should inform
future green, (de)hydrogenative catalysis with thiols and other transformations
catalyzed by related ruthenium pincer complexes.
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Affiliation(s)
- Michael Rauch
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Jie Luo
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Liat Avram
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Yehoshoa Ben-David
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - David Milstein
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
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17
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Yamamoto Y, Ota M, Kodama S, Michimoto K, Nomoto A, Ogawa A, Furuya M, Kawakami K. Au/Ag/Cu-Mixed Catalysts for the Eco-Friendly Oxidation of 5-Hydroxymethylfurfural and Related Compounds to Carboxylic Acids under Atmospheric Oxygen in Water. ACS OMEGA 2021; 6:2239-2247. [PMID: 33521463 PMCID: PMC7841932 DOI: 10.1021/acsomega.0c05526] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 11/23/2020] [Indexed: 06/12/2023]
Abstract
A green method for the oxidation of alcohols to carboxylic acids was developed using a novel co-catalytic system based on gold, silver, and copper catalysts. This reaction system was conducted under atmospheric oxygen in water and mild conditions to selectively oxidize 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid, as a building block for polyethylene furanoate, which is a 100% bio-based, future alternative to the petroleum-based polyethylene terephthalate. Furthermore, various primary alcohols were conveniently oxidized to their corresponding carboxylic acids in up to quantitative yields.
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Affiliation(s)
- Yuki Yamamoto
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Miyuto Ota
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Shintaro Kodama
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Kazuki Michimoto
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Akihiro Nomoto
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Akiya Ogawa
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Mitsunori Furuya
- Science
& Innovation Center, Mitsubishi Chemical
Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama-shi, Kanagawa 227-8502, Japan
| | - Kiminori Kawakami
- Science
& Innovation Center, Mitsubishi Chemical
Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama-shi, Kanagawa 227-8502, Japan
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18
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Paudel K, Xu S, Hietsoi O, Pandey B, Onuh C, Ding K. Switchable Imine and Amine Synthesis Catalyzed by a Well-Defined Cobalt Complex. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00727] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Keshav Paudel
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
- Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Shi Xu
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Oleksandr Hietsoi
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Bedraj Pandey
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Chuka Onuh
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Keying Ding
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
- Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
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19
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Özer H, Arslan D, Öztürk BÖ. Dehydrogenative alcohol coupling and one-pot cross metathesis/dehydrogenative coupling reactions of alcohols using Hoveyda–Grubbs catalysts. NEW J CHEM 2021. [DOI: 10.1039/d1nj00255d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Grubbs catalysts are shown to catalyze one-pot cross-metathesis/dehydrogenative alcohol coupling reactions in an efficient manner.
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Affiliation(s)
- Halenur Özer
- Hacettepe University
- Faculty of Science
- Chemistry Department
- Beytepe-Ankara
- Turkey
| | - Dilan Arslan
- Hacettepe University
- Faculty of Science
- Chemistry Department
- Beytepe-Ankara
- Turkey
| | - Bengi Özgün Öztürk
- Hacettepe University
- Faculty of Science
- Chemistry Department
- Beytepe-Ankara
- Turkey
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20
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Garia A, Chauhan P, Halder R, Jain N. Quinoline-Fused Lactones via Tandem Oxidation Cyclization: Metal-Free sp 3 C-H Functionalization. J Org Chem 2021; 86:538-546. [PMID: 33289376 DOI: 10.1021/acs.joc.0c02238] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A unique lactonization of 2-methyl-3-acyl-4-phenylquinolines using PhIO as the oxidant and selectfluor as an additive is reported. The reaction occurs under ambient conditions through tandem oxidation and cyclization of sp3 C-H bonds under metal-free conditions. The heterocycle-fused lactones are obtained in moderate to good yield.
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Affiliation(s)
- Alankrita Garia
- Department of Chemistry, Indian Institute of Technology, New Delhi 110016, India
| | - Parul Chauhan
- Department of Chemistry, Indian Institute of Technology, New Delhi 110016, India
| | - Riya Halder
- Department of Chemistry, Indian Institute of Technology, New Delhi 110016, India
| | - Nidhi Jain
- Department of Chemistry, Indian Institute of Technology, New Delhi 110016, India
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21
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Paudel K, Xu S, Ding K. α-Alkylation of Nitriles with Primary Alcohols by a Well-Defined Molecular Cobalt Catalyst. J Org Chem 2020; 85:14980-14988. [PMID: 33136400 DOI: 10.1021/acs.joc.0c01822] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The α-alkylation of nitriles with primary alcohols to selectively synthesize nitriles by a well-defined molecular homogeneous cobalt catalyst is presented. Thirty-two examples with up to 95% yield are reported. Remarkably, this transformation is environmentally friendly and atom economical with water as the only byproduct.
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Affiliation(s)
- Keshav Paudel
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States.,Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Shi Xu
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Keying Ding
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States.,Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
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22
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Zhou C, Zhao J, Chen W, Imerhasan M, Wang J. Synthesis of 3‐Unsubstituted Phthalides from Aryl Amides and Paraformaldehyde via Ruthenium(II)‐Catalyzed C–H Activation. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chao Zhou
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat‐Sen University 510275 Guangzhou China
| | - Junqi Zhao
- College of Chemistry and Chemical Engineering Xinjiang University Shengli Road 666 830046 Urumqi China
| | - Wenkun Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat‐Sen University 510275 Guangzhou China
| | - Mukhtar Imerhasan
- College of Chemistry and Chemical Engineering Xinjiang University Shengli Road 666 830046 Urumqi China
| | - Jun Wang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat‐Sen University 510275 Guangzhou China
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23
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Rohit KR, Radhika S, Saranya S, Anilkumar G. Manganese‐Catalysed Dehydrogenative Coupling – An Overview. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901389] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- K. R. Rohit
- School of Chemical SciencesMahatma Gandhi University Kottayam Kerala 686560 India
| | - Sankaran Radhika
- School of Chemical SciencesMahatma Gandhi University Kottayam Kerala 686560 India
| | - Salim Saranya
- School of Chemical SciencesMahatma Gandhi University Kottayam Kerala 686560 India
| | - Gopinathan Anilkumar
- School of Chemical SciencesMahatma Gandhi University Kottayam Kerala 686560 India
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24
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Tang Y, Meador RIL, Malinchak CT, Harrison EE, McCaskey KA, Hempel MC, Funk TW. (Cyclopentadienone)iron-Catalyzed Transfer Dehydrogenation of Symmetrical and Unsymmetrical Diols to Lactones. J Org Chem 2020; 85:1823-1834. [PMID: 31880449 DOI: 10.1021/acs.joc.9b01884] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Air-stable iron carbonyl compounds bearing cyclopentadienone ligands with varying substitution were explored as catalysts in dehydrogenative diol lactonization reactions using acetone as both the solvent and hydrogen acceptor. Two catalysts with trimethylsilyl groups in the 2- and 5-positions, [2,5-(SiMe3)2-3,4-(CH2)4(η4-C4C═O)]Fe(CO)3 (1) and [2,5-(SiMe3)2-3,4-(CH2)3(η4-C4C═O)]Fe(CO)3 (2), were found to be the most active, with 2 being the most selective in the lactonization of diols containing both primary and secondary alcohols. Lactones containing five-, six-, and seven-membered rings were successfully synthesized, and no over-oxidations to carboxylic acids were detected. The lactonization of unsymmetrical diols containing two primary alcohols occurred with catalyst 1, but selectivity was low based on alcohol electronics and modest based on alcohol sterics. Evidence for a transfer dehydrogenation mechanism was found, and insight into the origin of selectivity in the lactonization of 1°/2° diols was obtained. Additionally, spectroscopic evidence for a trimethylamine-ligated iron species formed in solution during the reaction was discovered.
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Affiliation(s)
- Yidan Tang
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Rowan I L Meador
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Casina T Malinchak
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Emily E Harrison
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Kimberly A McCaskey
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Melanie C Hempel
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
| | - Timothy W Funk
- Department of Chemistry , Gettysburg College , Gettysburg , Pennsylvania 17325 , United States
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25
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Cai M, Wang X, Chen Y, Dai L. Oxidative lactonization of diethylene glycol to high-value-added product 1,4-dioxan-2-one promoted by a highly efficacious and selective catalyst ZnO-ZnCr2O4. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2019.110643] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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26
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Ligand-controlled phosphine-free Co(II)-catalysed cross-coupling of secondary and primary alcohols. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130640] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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27
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Bottaro F, Takallou A, Chehaiber A, Madsen R. Cobalt-Catalyzed Dehydrogenative Coupling of Amines into Imines. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901462] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Fabrizio Bottaro
- Department of Chemistry; Technical University of Denmark; 2800 Kgs. Lyngby Denmark
| | - Ahmad Takallou
- Department of Chemistry; Technical University of Denmark; 2800 Kgs. Lyngby Denmark
| | - Ahmad Chehaiber
- Department of Chemistry; Technical University of Denmark; 2800 Kgs. Lyngby Denmark
| | - Robert Madsen
- Department of Chemistry; Technical University of Denmark; 2800 Kgs. Lyngby Denmark
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28
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Pandey B, Xu S, Ding K. Selective Ketone Formations via Cobalt-Catalyzed β-Alkylation of Secondary Alcohols with Primary Alcohols. Org Lett 2019; 21:7420-7423. [DOI: 10.1021/acs.orglett.9b02727] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bedraj Pandey
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Shi Xu
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Keying Ding
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
- Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
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29
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Mori T, Ishii C, Kimura M. Pd-Catalyzed Dehydrogenative Oxidation of Alcohols to Functionalized Molecules. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00207] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takamichi Mori
- Department of Applied Chemistry, Faculty of Engineering, Sanyo-Onoda City University, 1-1-1 Daigakudori, Sanyo-Onoda, Yamaguchi 756-0884, Japan
| | - Chihiro Ishii
- Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo machi, Nagasaki 852-8521, Japan
| | - Masanari Kimura
- Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo machi, Nagasaki 852-8521, Japan
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30
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Bottaro F, Madsen R. In Situ Generated Cobalt Catalyst for the Dehydrogenative Coupling of Alcohols and Amines into Imines. ChemCatChem 2019. [DOI: 10.1002/cctc.201900392] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Fabrizio Bottaro
- Department of ChemistryTechnical University of Denmark 2800 Kgs. Lyngby Denmark
| | - Robert Madsen
- Department of ChemistryTechnical University of Denmark 2800 Kgs. Lyngby Denmark
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31
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He X, Li Y, Fu H, Zheng X, Chen H, Li R, Yu X. Synthesis of Unsymmetrical N-Heterocyclic Carbene–Nitrogen–Phosphine Chelated Ruthenium(II) Complexes and Their Reactivity in Acceptorless Dehydrogenative Coupling of Alcohols to Esters. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00071] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaochun He
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yaqiu Li
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Haiyan Fu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xueli Zheng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Hua Chen
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Ruixiang Li
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaojun Yu
- Department of Chemistry, School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, China
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32
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Eberhardt NA, Wellala NPN, Li Y, Krause JA, Guan H. Dehydrogenative Coupling of Aldehydes with Alcohols Catalyzed by a Nickel Hydride Complex. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00888] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nathan A. Eberhardt
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Nadeesha P. N. Wellala
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Yingze Li
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Jeanette A. Krause
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Hairong Guan
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
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33
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Thiyagarajan S, Gunanathan C. Catalytic Cross-Coupling of Secondary Alcohols. J Am Chem Soc 2019; 141:3822-3827. [DOI: 10.1021/jacs.9b00025] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Subramanian Thiyagarajan
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar-752050, India
| | - Chidambaram Gunanathan
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar-752050, India
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34
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Yuan DJ, Hengne AM, Saih Y, Huang KW. Nonoxidative Dehydrogenation of Methanol to Methyl Formate through Highly Stable and Reusable CuMgO-Based Catalysts. ACS OMEGA 2019; 4:1854-1860. [PMID: 31459440 PMCID: PMC6648458 DOI: 10.1021/acsomega.8b03069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Accepted: 01/14/2019] [Indexed: 06/10/2023]
Abstract
Nonoxidative dehydrogenation of methanol to methyl formate over a CuMgO-based catalyst was investigated. Although the active site is metallic copper (Cu0), the best reaction conditions were obtained by tuning the ratio of Cu/Mg and doping the catalyst with 1 wt % of Pd to achieve a very specific activity for methyl formate synthesis. On the basis of the CO2 temperature-programmed desorption study, the basic strength of the catalyst plays a role in the efficient conversion of methanol to methyl formate via dehydrogenation. These CuMgO-based catalysts show excellent thermal stability during the reaction and the regeneration processes. Approx. 80% methanol conversion with constant selectivity to methyl formate was achieved even after 4 rounds of usage for a total reaction time exceeding 200 h, indicative of their potential for practical applications.
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