1
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Nuwayhid RB, Kozen AC, Long DM, Ahuja K, Rubloff GW, Gregorczyk KE. Dynamic Electrode-Electrolyte Intermixing in Solid-State Sodium Nano-Batteries. ACS APPLIED MATERIALS & INTERFACES 2023; 15:24271-24283. [PMID: 37167022 DOI: 10.1021/acsami.2c23256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Nanostructured solid-state batteries (SSBs) are poised to meet the demands of next-generation energy storage technologies by realizing performance competitive to their liquid-based counterparts while simultaneously offering improved safety and expanded form factors. Atomic layer deposition (ALD) is among the tools essential to fabricate nanostructured devices with challenging aspect ratios. Here, we report the fabrication and electrochemical testing of the first nanoscale sodium all-solid-state battery (SSB) using ALD to deposit both the V2O5 cathode and NaPON solid electrolyte followed by evaporation of a thin-film Na metal anode. NaPON exhibits remarkable stability against evaporated Na metal, showing no electrolyte breakdown or significant interphase formation in the voltage range of 0.05-6.0 V vs Na/Na+. Electrochemical analysis of the SSB suggests intermixing of the NaPON/V2O5 layers during fabrication, which we investigate in three ways: in situ spectroscopic ellipsometry, time-resolved X-ray photoelectron spectroscopy (XPS) depth profiling, and cross-sectional cryo-scanning transmission electron microscopy (cryo-STEM) coupled with electron energy loss spectroscopy (EELS). We characterize the interfacial reaction during the ALD NaPON deposition on V2O5 to be twofold: (1) reduction of V2O5 to VO2 and (2) Na+ insertion into VO2 to form NaxVO2. Despite the intermixing of NaPON-V2O5, we demonstrate that NaPON-coated V2O5 electrodes display enhanced electrochemical cycling stability in liquid-electrolyte coin cells through the formation of a stable electrolyte interphase. In all-SSBs, the Na metal evaporation process is found to intensify the intermixing reaction, resulting in the irreversible formation of mixed interphases between discrete battery layers. Despite this graded composition, the SSB can operate for over 100 charge-discharge cycles at room temperature and represents the first demonstration of a functional thin-film solid-state sodium-ion battery.
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Affiliation(s)
- R Blake Nuwayhid
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
- Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742, United States
| | - Alexander C Kozen
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
- Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742, United States
| | - Daniel M Long
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
- UES Inc., Beavercreek, Ohio 45432, United States
- Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87123, United States
| | - Kunal Ahuja
- Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742, United States
- Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Gary W Rubloff
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
- Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742, United States
| | - Keith E Gregorczyk
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
- Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742, United States
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2
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KO Bu-mediated transition-metal-free synthesis of pyrimidines by selective three-component coupling reactions: A mechanistic insight. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Raut RK, Waghamare AB, Patel N, Majumdar M. Role of N, N′‐diboryl‐4, 4′‐bipyridinylidene in the Transition metal‐free Borylation of Aryl Halides and Direct C‐H arylation of Unactivated Benzene. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ravindra K. Raut
- Indian Institute of Science Education and Research Pune Chemistry INDIA
| | | | - Niranjan Patel
- Indian Institute of Science Education and Research Pune Chemistry INDIA
| | - Moumita Majumdar
- Indian Institute of Science Education and Research, Pune Chemistry Dr. Homi Bhabha RoadPashan 411008 Pune INDIA
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4
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Ahmed J, Mandal SK. Phenalenyl Radical: Smallest Polycyclic Odd Alternant Hydrocarbon Present in the Graphene Sheet. Chem Rev 2022; 122:11369-11431. [PMID: 35561295 DOI: 10.1021/acs.chemrev.1c00963] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Phenalenyl, a zigzag-edged odd alternant hydrocarbon unit can be found in the graphene nanosheet. Hückel molecular orbital calculations indicate the presence of a nonbonding molecular orbital (NBMO), which originates from the linear combination of atomic orbitals (LCAO) arising from 13 carbon atoms of the phenalenyl molecule. Three redox states (cationic, neutral radical, and anionic) of the phenalenyl-based molecules were attributed to the presence of this NBMO. The cationic state can undergo two consecutive reductions to result in neutral radical and anionic states, stepwise, respectively. The phenalenyl-based radicals were found as crucial building blocks and attracted the attention of various research fields such as organic synthesis, material science, computation, and device physics. From 2012 onward, a strategy was devised using the cationic state of phenalenyl-based molecules and in situ generated phenalenyl radicals, which created a new domain of catalysis. The in situ generated phenalenyl radicals were utilized for the single electron transfer (SET) process resulting in redox catalysis. This emerging range of applications rejuvenates the more than six decades-old phenalenyl chemistry. This review captures such developments ranging from fundamental understanding to multidirectional applications of phenalenyl-based radicals.
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Affiliation(s)
- Jasimuddin Ahmed
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur 741246, India
| | - Swadhin K Mandal
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur 741246, India
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5
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Kundu A, Dey D, Pal S, Adhikari D. Pyrazole-Mediated C-H Functionalization of Arene and Heteroarenes for Aryl-(Hetero)aryl Cross-Coupling Reactions. J Org Chem 2021; 86:15665-15673. [PMID: 34699216 DOI: 10.1021/acs.joc.1c02234] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we introduce a transition-metal-free protocol that involves a commercially available, inexpensive pyrazole molecule to conduct C-C cross-coupling reactions at room temperature via a radical pathway. Using this method, an aryldiazonium salt has been coupled to a wide range of arenes and heteroarenes including benzene, mesitylene, thiophene, furan, benzoxazole to result the corresponding biaryl products. The full reaction mechanism is elucidated along with the crystallographic probation of an active initiator species. A potassium-stabilized deprotonated pyrazole steers single-electron transfer to the substrate and behaves as an initiator for the reaction.
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Affiliation(s)
- Abhishek Kundu
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar 140306, India
| | - Dhananjay Dey
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar 140306, India
| | - Subhankar Pal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar 140306, India
| | - Debashis Adhikari
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, SAS Nagar 140306, India
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6
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Chung H, Kim J, González-Montiel GA, Ha-Yeon Cheong P, Lee HG. Modular Counter-Fischer-Indole Synthesis through Radical-Enolate Coupling. Org Lett 2021; 23:1096-1102. [PMID: 33415986 DOI: 10.1021/acs.orglett.1c00003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A single-electron transfer mediated modular indole formation reaction from a 2-iodoaniline derivative and a ketone has been developed. This transition-metal-free reaction shows a broad substrate scope and unconventional regioselectivity trends. Moreover, important functional groups for further transformation are tolerated under the reaction conditions. Density functional theory studies reveal that the reaction proceeds by metal coordination, which converts a disfavored 5-endo-trig cyclization to an accessible 7-endo-trig process.
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Affiliation(s)
- Hyunho Chung
- Department of Chemistry. College of Natural Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jeongyun Kim
- Department of Chemistry. College of Natural Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Gisela A González-Montiel
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Paul Ha-Yeon Cheong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Hong Geun Lee
- Department of Chemistry. College of Natural Sciences, Seoul National University, Seoul 08826, Republic of Korea
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7
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Madasu J, Shinde S, Das R, Patel S, Shard A. Potassium tert-butoxide mediated C-C, C-N, C-O and C-S bond forming reactions. Org Biomol Chem 2020; 18:8346-8365. [PMID: 33020791 DOI: 10.1039/d0ob01382j] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Potassium tertiary butoxide (KOtBu) mediated constructions of C-C, C-O, C-N, and C-S bonds are reviewed with special emphasis on their synthetic applications. KOtBu can be used to perform reactions already known to be carried out using transition metals, but it has advantages in terms of environmental congruence and economic cost. KOtBu is widely employed in organic synthesis to mediate the construction of C-C, C-O, C-N, C-S and miscellaneous bonds in good to excellent yields. Synthetic uses of KOtBu in coupling, alkylation, arylation, α-phenylation, cyclization, Heck-type, annulation, photo-arylation, aromatic-substitution, amidation, and silylation reactions are summarized and discussed. The mechanisms through which KOtBu carries out a specific reaction are also discussed. One of the goals of this review is to attract the attention of chemists as to the benefits of using KOtBu as an environmentally benign alternative to transition metals and its applications in the construction of chemical bonds with predominant importance in organic synthesis. This review completely covers the synthetic protocols that have been performed using KOtBu in the last two decades.
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Affiliation(s)
- Jayashree Madasu
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gujarat 380054, India.
| | - Shital Shinde
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gujarat 380054, India.
| | - Rudradip Das
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gujarat 380054, India.
| | - Sagarkumar Patel
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gujarat 380054, India.
| | - Amit Shard
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gujarat 380054, India.
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8
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Tiwari MK, Yadav L, Chaudhary S. [2,3‐Bis‐(2‐pyridyl) pyrazine] as an Efficient Organocatalyst for the Direct C
(sp
2
)
‐H Arylation of Unactivated Arenes/Heteroarenes
via
C−H Bond Activation. ChemistrySelect 2020. [DOI: 10.1002/slct.202003140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mohit K. Tiwari
- Laboratory of Organic and Medicinal Chemistry Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
| | - Lalit Yadav
- Laboratory of Organic and Medicinal Chemistry Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
| | - Sandeep Chaudhary
- Laboratory of Organic and Medicinal Chemistry Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
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9
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Frühwirt P, Knoechl A, Pillinger M, Müller SM, Wasdin PT, Fischer RC, Radebner J, Torvisco A, Moszner N, Kelterer AM, Griesser T, Gescheidt G, Haas M. The Chemistry of Acylgermanes: Triacylgermenolates Represent Valuable Building Blocks for the Synthesis of a Variety of Germanium-Based Photoinitiators. Inorg Chem 2020; 59:15204-15217. [PMID: 32993291 PMCID: PMC7581296 DOI: 10.1021/acs.inorgchem.0c02181] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
![]()
The formation of
a stable triacylgermenolate 2 as
a decisive intermediate was achieved by using three pathways. The
first two methods involve the reaction of KOtBu or
alternatively potassium with tetraacylgermane 1 yielding 2 via one electron transfer. The mechanism involves the formation
of radical anions (shown by EPR). This reaction is highly efficient
and selective. The third method is a classical salt metathesis reaction
toward 2 in nearly quantitative yield. The formation
of 2 was confirmed by NMR spectroscopy, UV–vis
measurements, and X-ray crystallography. Germenolate 2 serves as a starting point for a wide variety of organo-germanium
compounds. We demonstrate the potential of this intermediate by introducing
new types of Ge-based photoinitiators 4b–4f. The UV–vis absorption spectra of 4b–4f show considerably increased band intensities
due to the presence of eight or more chromophores. Moreover, compounds 4d–4f show absorption tailing up to 525
nm. The performance of these photoinitiators is demonstrated by spectroscopy
(time-resolved EPR, laser flash photolysis (LFP), photobleaching (UV–vis))
and photopolymerization experiments (photo-DSC measurements). Triacylgermenolate 2 was
obtained by using
KOtBu or alternatively potassium. The mechanism involves
the formation of radical anions (shown by EPR). The one-pot synthetic
protocol produces 2 in >95% yield, as confirmed by
NMR
spectroscopy and X-ray crystallography. Germenolate 2 serves as a starting point for a wide variety of organo-germanium
compounds. This was demonstrated by introducing new types of Ge-based
photoinitiators 4b−4f. Their performance
was analyzed by sophisticated spectroscopic methods and photopolymerization
experiments.
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Affiliation(s)
| | | | | | - Stefanie M Müller
- Institute of Chemistry of Polymeric Materials, Montanuniversitaet Leoben, Otto-Gloeckelstrasse 2, A-8700 Leoben, Austria
| | | | | | | | | | - Norbert Moszner
- Ivoclar Vivadent AG, Bendererstraße 2, FL-9494 Schaan, Liechtenstein
| | | | - Thomas Griesser
- Institute of Chemistry of Polymeric Materials, Montanuniversitaet Leoben, Otto-Gloeckelstrasse 2, A-8700 Leoben, Austria
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10
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Affiliation(s)
- Carlotta Raviola
- PhotoGreen Lab University of Pavia Viale Taramelli 10 27100 Pavia Italy
| | - Stefano Protti
- PhotoGreen Lab University of Pavia Viale Taramelli 10 27100 Pavia Italy
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11
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Azizi K, Madsen R. Radical condensation between benzylic alcohols and acetamides to form 3-arylpropanamides. Chem Sci 2020; 11:7800-7806. [PMID: 34123070 PMCID: PMC8163310 DOI: 10.1039/d0sc02948c] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
A new radical condensation reaction is developed where benzylic alcohols and acetamides are coupled to generate 3-arylpropanamides with water as the only byproduct. The transformation is performed with potassium tert-butoxide as the only additive and gives rise to a variety of 3-arylpropanamides in good yields. The mechanism has been investigated experimentally with labelled substrates, trapping experiments and spectroscopic measurements. The findings indicate a radical pathway where potassium tert-butoxide is believed to serve a dual role as both base and radical initiator. The radical anion of the benzylic alcohol is proposed as the key intermediate, which undergoes coupling with the enolate of the amide to form the new C–C bond. Subsequent elimination to the corresponding cinnamamide and olefin reduction then affords the 3-arylpropanamides. Benzylic alcohols and acetamides are coupled into 3-arylpropanamides by a new radical condensation through the radical anion of the alcohol.![]()
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Affiliation(s)
- Kobra Azizi
- 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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12
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Khatua M, Goswami B, Samanta S. Dehydrogenation of amines in aryl-amine functionalized pincer-like nitrogen-donor redox non-innocent ligands via ligand reduction on a Ni(ii) template. Dalton Trans 2020; 49:6816-6831. [PMID: 32374795 DOI: 10.1039/d0dt00466a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We have synthesized a series of new redox non-innocent azo aromatic pincer-like ligands: 2-(phenylazo)-6-(arylaminomethyl)pyridine (HLa-c: HLa = 2-(phenylazo)-6-(2,6-diisopropylphenylaminomethyl)pyridine, HLb = 2-(phenylazo)-6-(2,6-dimethylphenylaminomethyl)pyridine, and HLc = 2-(phenylazo)-6-(phenylaminomethyl)pyridine), in which one side arm is an arylaminomethyl moiety and the other arm is a 2-phenylazo moiety. Nickel(ii) complexes, 1-3, of these ligands HLa-c were synthesized in good yield (approximately 70%) by the reaction of ligands : (NiCl2·6H2O) in a 1 : 1 molar ratio in methanol. The amine donor in each of the ligands HLa-c binds to the Ni(ii) centre without deprotonation. In the solid state, complex 3 is a dimer; in solution it exists as monomer 3a. The reduction of acetonitrile solutions of each of the complexes 1, 2 and 3a, separately, with cobaltocene (1 equivalent), followed by exposure of the solution to air, resulted in the formation of new complexes 7, 8 and 9, respectively. Novel free ligands Lx and Ly have also been isolated, in addition to complexes 7 and 8, from the reaction of complexes 1 and 2, respectively. Complexes 7-9 and free ligands Lx and Ly have been formed via a dehydrogenation reaction of the arylaminomethyl side arm. The mechanism of the reaction was thoroughly investigated using a series of studies, including cyclic voltammetry, EPR, and UV-Vis spectral studies and density functional theory (DFT) calculations. The results of these studies suggest a mechanism initiated by ligand reduction followed by dioxygen activation. A Cl-/I- scrambling experiment revealed that the dissociation of the chloride ligand(s) was associated with the one-electron reduction of the ligand (azo moiety) in each of the complexes 1, 2 and 3a. The dissociated chloride ligand(s) were reassociated with the metal following the dehydrogenation reaction to yield the final products. All of the newly synthesized compounds were fully characterized using a variety of physicochemical techniques. Single-crystal X-ray structures of the representative compounds were determined to confirm the identities of the synthesized molecules.
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Affiliation(s)
- Manas Khatua
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, India
| | - Bappaditya Goswami
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, India
| | - Subhas Samanta
- Department of Chemistry, Indian Institute of Technology Jammu, Jammu 181221, India.
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13
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Tian W, He K, Li N, Fen, Liu, Mai X, Feng L, He Y. Transition‐Metal‐Free Coupling Reactions: PPh
3
‐Promoted Sonogashira‐Type Cross‐Couplings of Heteroaryl Halides with Terminal Alkynes. ChemistrySelect 2020. [DOI: 10.1002/slct.202000416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wan‐Fa Tian
- Jiangxi Key Laboratory of Organic ChemistryJiangxi Science and Technology Normal University Nanchang 330013 China
| | - Ke‐Han He
- School of ScienceXichang University Xichang 615000 China
| | - Na Li
- School of Pharmaceutical ScienceNanchang University Nanchang 330000 China
| | - Fen
- School of Pharmaceutical ScienceNanchang University Nanchang 330000 China
| | - Liu
- School of Pharmaceutical ScienceNanchang University Nanchang 330000 China
| | - Xi Mai
- School of Pharmaceutical ScienceNanchang University Nanchang 330000 China
| | - Li‐Hua Feng
- School of Pharmaceutical ScienceNanchang University Nanchang 330000 China
| | - Yong‐Qin He
- School of Pharmaceutical ScienceNanchang University Nanchang 330000 China
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14
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Liu Z, Wang P, Chen Y, Yan Z, Chen S, Chen W, Mu T. Small organic molecules with tailored structures: initiators in the transition-metal-free C–H arylation of unactivated arenes. RSC Adv 2020; 10:14500-14509. [PMID: 35497128 PMCID: PMC9051888 DOI: 10.1039/d0ra01845g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 03/24/2020] [Indexed: 01/07/2023] Open
Abstract
A small organic molecule was tailored for the efficient synthesis of biphenyl and its derivatives from aryl iodides.
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Affiliation(s)
- Zhenghui Liu
- School of Pharmaceutical and Materials Engineering
- Taizhou University
- Taizhou 318000
- China
| | - Peng Wang
- Beijing National Laboratory for Molecular Sciences
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Yu Chen
- Department of Chemistry and Material Science
- Langfang Normal University
- Langfang 065000
- China
| | - Zhenzhong Yan
- School of Pharmaceutical and Materials Engineering
- Taizhou University
- Taizhou 318000
- China
| | - Suqing Chen
- School of Pharmaceutical and Materials Engineering
- Taizhou University
- Taizhou 318000
- China
| | - Wenjun Chen
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Tiancheng Mu
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
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15
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Vodnala N, Gujjarappa R, Polina S, Satheesh V, Kaldhi D, Kabi AK, Malakar CC. An organocatalytic C–C bond cleavage approach: a metal-free and peroxide-free facile method for the synthesis of amide derivatives. NEW J CHEM 2020. [DOI: 10.1039/d0nj04158k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
An organocatalyzed C–C bond cleavage approach has been envisioned towards the synthesis of amide derivatives from their corresponding amines and 1,3-dicarbonyls.
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Affiliation(s)
- Nagaraju Vodnala
- Department of Chemistry
- National Institute of Technology Manipur
- Imphal – 795004
- India
| | - Raghuram Gujjarappa
- Department of Chemistry
- National Institute of Technology Manipur
- Imphal – 795004
- India
| | - Saibabu Polina
- Department of Chemistry
- CHRIST (Deemed to be University)
- Bangalore – 560029
- India
| | - Vanaparthi Satheesh
- Schulich Faculty of Chemistry
- Technion-Israel Institute of Technology
- Haifa – 3200003
- Israel
| | - Dhananjaya Kaldhi
- Department of Chemistry
- National Institute of Technology Manipur
- Imphal – 795004
- India
| | - Arup K. Kabi
- Department of Chemistry
- National Institute of Technology Manipur
- Imphal – 795004
- India
| | - Chandi C. Malakar
- Department of Chemistry
- National Institute of Technology Manipur
- Imphal – 795004
- India
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16
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The role of organic electron donors in the initiation of BHAS base-induced coupling reactions between haloarenes and arenes. Sci China Chem 2019. [DOI: 10.1007/s11426-019-9611-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Maiti D, Halder A, De Sarkar S. Base‐Promoted Aerobic Oxidation/Homolytic Aromatic Substitution Cascade toward the Synthesis of Phenanthridines. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900995] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Debabrata Maiti
- Department of Chemical SciencesIndian Institute of Science Education and Research Kolkata Mohanpur – 741246, West Bengal India
| | - Atreyee Halder
- Department of Chemical SciencesIndian Institute of Science Education and Research Kolkata Mohanpur – 741246, West Bengal India
| | - Suman De Sarkar
- Department of Chemical SciencesIndian Institute of Science Education and Research Kolkata Mohanpur – 741246, West Bengal India
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18
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Meng L, Chi X, Sun X, Cao C, Ai B, Liu Q, Zhao P, Zhao Z, Dong Y, Liu H. An organocatalytic method for constructing pyrroles via the cycloisomerisation of Z-1-iodo-4-N-methylbenzenesulfonyl-1,6-enynes. Org Biomol Chem 2019; 17:7669-7673. [PMID: 31384864 DOI: 10.1039/c9ob01123d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new cycloisomerisation of Z-1-iodo-4-N-methylbenzenesulfonyl-1,6-enynes to functionalized pyrroles was realized in the presence of an organomolecule (4,4'-bis(1,1-dimethylethyl)-2,2'-bipyridine) and KOtBu. The transformations were performed efficiently to produce different kinds of functionalized pyrroles within 10 min. This is the first example of an organomolecule promoted methodology with vinyl iodides from a non-aromatic system to an aromatic system, which offers an excellent option toward establishing a new horizon for cross-coupling reactions of vinyl halides. Preliminary mechanistic studies were performed and a crude radical pathway was proposed.
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Affiliation(s)
- Long Meng
- School of Chemistry & Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China.
| | - Xiaochen Chi
- School of Chemistry & Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China.
| | - Xi Sun
- School of Chemistry & Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China.
| | - Chengqiang Cao
- School of Chemistry & Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China.
| | - Bing Ai
- School of Chemistry & Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China.
| | - Qing Liu
- School of Chemistry & Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China.
| | - Pingping Zhao
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, 579 Qianwangang Road, Huangdao District, Qingdao, 266590, P.R. China
| | - Zengdian Zhao
- School of Chemistry & Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China.
| | - Yunhui Dong
- School of Chemistry & Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China.
| | - Hui Liu
- School of Chemistry & Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China.
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19
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Khelifi I, Zhao G, Ghermani NE, Provot O, Alami M. Unexpected Oxidative Ring Opening of Electron-Rich 3-Aminobenzofurans into α-Ketoimines Derivatives. J Org Chem 2019; 84:1725-1733. [PMID: 30352149 DOI: 10.1021/acs.joc.8b01685] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An unexpected ring opening of 3-aminobenzofurans promoted by NaO tBu in hot toluene, leading to a variety of α-ketoimines, is described. In the presence of 3-iodobenzofurans, NaO tBu mediates the 3-aminobenzofurans ring opening via a possible radical pathway without the help of any external radical sources.
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Affiliation(s)
- Ilhem Khelifi
- Univ. Paris-Sud, BioCIS, CNRS, University Paris-Saclay, Equipe Labellisée Ligue Contre Le Cancer , F-92296 Châtenay-Malabry , France
| | - Guangkuan Zhao
- Univ. Paris-Sud, BioCIS, CNRS, University Paris-Saclay, Equipe Labellisée Ligue Contre Le Cancer , F-92296 Châtenay-Malabry , France
| | - Nour-Eddine Ghermani
- Univ. Paris-Sud, Institut Galien Paris-Sud, CNRS, University Paris-Saclay , F-92296 Châtenay-Malabry , France
| | - Olivier Provot
- Univ. Paris-Sud, BioCIS, CNRS, University Paris-Saclay, Equipe Labellisée Ligue Contre Le Cancer , F-92296 Châtenay-Malabry , France
| | - Mouad Alami
- Univ. Paris-Sud, BioCIS, CNRS, University Paris-Saclay, Equipe Labellisée Ligue Contre Le Cancer , F-92296 Châtenay-Malabry , France
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20
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Boultwood T, Bull JA. Synthesis of Selenoaziridines: A Study on Stereochemical Outcomes of the Reaction of Aziridine Radicals and Anions Generated from Iodoaziridines. ACS OMEGA 2019; 4:870-879. [PMID: 31459364 PMCID: PMC6648590 DOI: 10.1021/acsomega.8b03019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 12/26/2018] [Indexed: 06/10/2023]
Abstract
The synthesis of a new functional group in the form of selenyl-substituted aziridines is described. Selenoaziridines are stereoselectively prepared by functionalization of intact aziridine precursors involving radical and anionic intermediates. Radicals are generated from cis-N-Ts iodoaziridines by activation of the C-I bond using alkoxides as a source of single electrons. These form predominantly trans-substituted selenoaziridines dependent on the size of the diselenide. cis-Aziridinyllithiums generated by Li-I exchange also react with diselenides stereospecifically to form a range of cis-selenoaziridines. Proposals for the stereochemical outcome are presented.
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Affiliation(s)
- Tom Boultwood
- Department
of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K.
| | - James A. Bull
- Department
of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, U.K.
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21
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Sinha S, Sikari R, Sinha V, Jash U, Das S, Brandão P, Demeshko S, Meyer F, de Bruin B, Paul ND. Iron-Catalyzed/Mediated C–N Bond Formation: Competition between Substrate Amination and Ligand Amination. Inorg Chem 2019; 58:1935-1948. [DOI: 10.1021/acs.inorgchem.8b02877] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Suman Sinha
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur Botanic
Garden, Howrah 711103, India
| | - Rina Sikari
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur Botanic
Garden, Howrah 711103, India
| | - Vivek Sinha
- Homogeneous Catalysis Group, van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Upasona Jash
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur Botanic
Garden, Howrah 711103, India
| | - Siuli Das
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur Botanic
Garden, Howrah 711103, India
| | - Paula Brandão
- Departamento de Química, CICECO-Instituto de Materiais de Aveiro, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Serhiy Demeshko
- Universität Göttingen, Institut für Anorganische Chemie, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Franc Meyer
- Universität Göttingen, Institut für Anorganische Chemie, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Bas de Bruin
- Homogeneous Catalysis Group, van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Nanda D. Paul
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur Botanic
Garden, Howrah 711103, India
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22
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Barham JP, Dalton SE, Allison M, Nocera G, Young A, John MP, McGuire T, Campos S, Tuttle T, Murphy JA. Dual Roles for Potassium Hydride in Haloarene Reduction: CSNAr and Single Electron Transfer Reduction via Organic Electron Donors Formed in Benzene. J Am Chem Soc 2018; 140:11510-11518. [DOI: 10.1021/jacs.8b07632] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Joshua P. Barham
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
- GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Samuel E. Dalton
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
- GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Mark Allison
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Giuseppe Nocera
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Allan Young
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Matthew P. John
- GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Thomas McGuire
- Medicinal Chemistry, Oncology, IMED Biotech Unit, AstraZeneca, 319 Milton Road, Cambridge CB4 0WG, U.K
| | - Sebastien Campos
- GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Tell Tuttle
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - John A. Murphy
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
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23
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Nocera G, Young A, Palumbo F, Emery KJ, Coulthard G, McGuire T, Tuttle T, Murphy JA. Electron Transfer Reactions: KO tBu (but not NaO tBu) Photoreduces Benzophenone under Activation by Visible Light. J Am Chem Soc 2018; 140:9751-9757. [PMID: 29996048 DOI: 10.1021/jacs.8b06089] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Long-standing controversial reports of electron transfer from KO tBu to benzophenone have been investigated and resolved. The mismatch in the oxidation potential of KO tBu (+0.10 V vs SCE in DMF) and the first reduction potential of benzophenone (of many values cited in the literature, the least negative value is -1.31 V vs SCE in DMF), preclude direct electron transfer. Experimental and computational results now establish that a complex is formed between the two reagents, with the potassium ion providing the linkage, which markedly shifts the absorption spectrum to provide a tail in the visible light region. Photoactivation at room temperature by irradiation at defined wavelength (365 or 400 nm), or even by winter daylight, leads to the development of the blue color of the potassium salt of benzophenone ketyl, whereas no reaction is observed when the reaction mixture is maintained in darkness. So, no electron transfer occurs in the ground state. However, when photoexcited, electron transfer occurs within a complex formed from benzophenone and KO tBu. TDDFT studies match experimental findings and also define the electronic transition within the complex as n → π*, originating on the butoxide oxygen. Computation and experiment also align in showing that this reaction is selective for KO tBu; no such effect occurs with NaO tBu, providing the first case where such alkali metal ion selectivity is rationalized in detail. Chemical evidence is provided for the photoactivated electron transfer from KO tBu to benzophenone: tert-butoxyl radicals are formed and undergo fragmentation to form (acetone and) methyl radicals, some of which are trapped by benzophenone. Likewise, when KOC(Et)3 is used in place of KO tBu, then ethylation of benzophenone is seen. Further evidence of electron transfer was seen when the reaction was conducted in benzene, in the presence of p-iodotoluene; this triggered BHAS coupling to form 4-methylbiphenyl in 74% yield.
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Affiliation(s)
- Giuseppe Nocera
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Allan Young
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Fabrizio Palumbo
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Katie J Emery
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Graeme Coulthard
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Thomas McGuire
- Medicinal Chemistry, Oncology, IMED Biotech Unit , AstraZeneca , 319 Milton Road , Cambridge CB4 0WG , U.K
| | - Tell Tuttle
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - John A Murphy
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
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24
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Emery KJ, Young A, Arokianathar JN, Tuttle T, Murphy JA. KO tBu as a Single Electron Donor? Revisiting the Halogenation of Alkanes with CBr₄ and CCl₄. Molecules 2018; 23:molecules23051055. [PMID: 29724009 PMCID: PMC6102552 DOI: 10.3390/molecules23051055] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 04/24/2018] [Accepted: 04/26/2018] [Indexed: 11/29/2022] Open
Abstract
The search for reactions where KOtBu and other tert-alkoxides might behave as single electron donors led us to explore their reactions with tetrahalomethanes, CX4, in the presence of adamantane. We recently reported the halogenation of adamantane under these conditions. These reactions appeared to mirror the analogous known reaction of NaOH with CBr4 under phase-transfer conditions, where initiation features single electron transfer from a hydroxide ion to CBr4. We now report evidence from experimental and computational studies that KOtBu and other alkoxide reagents do not go through an analogous electron transfer. Rather, the alkoxides form hypohalites upon reacting with CBr4 or CCl4, and homolytic decomposition of appropriate hypohalites initiates the halogenation of adamantane.
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Affiliation(s)
- Katie J Emery
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, UK.
| | - Allan Young
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, UK.
| | - J Norman Arokianathar
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, UK.
| | - Tell Tuttle
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, UK.
| | - John A Murphy
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, UK.
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25
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Palladium supported SBA-functionalizd 1,2-dicarboxylic acid: The first Pd-based heterogeneous synthesis of fluorenones. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2017.12.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Cumine F, Zhou S, Tuttle T, Murphy JA. A study of diketopiperazines as electron-donor initiators in transition metal-free haloarene-arene coupling. Org Biomol Chem 2018; 15:3324-3336. [PMID: 28362016 DOI: 10.1039/c7ob00036g] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Several diketopiperazines have been shown to promote carbon-carbon coupling between benzene and aryl halides in the presence of potassium tert-butoxide and without the assistance of a transition metal catalyst. The structure of the diketopiperazine has an influence on its reductive potential and can help to promote the coupling of the more challenging aryl bromides with benzene.
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Affiliation(s)
- Florimond Cumine
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K.
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27
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Stephens DE, Lakey-Beitia J, Burch JE, Arman HD, Larionov OV. Mechanistic insights into the potassium tert-butoxide-mediated synthesis of N-heterobiaryls. Chem Commun (Camb) 2018; 52:9945-8. [PMID: 27440397 DOI: 10.1039/c6cc04816a] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We report herein that symmetrical and non-symmetrical N-heterobiaryls are produced by a potassium tert-butoxide-mediated dimerization of heterocyclic N-oxides. The reaction is scalable and transition metal-free, and can be carried out under thermal and microwave conditions. Preliminary mechanistic studies point to the involvement of radical anionic intermediates arising from the N-oxide substrates and potassium tert-butoxide.
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Affiliation(s)
- David E Stephens
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX 78249, USA.
| | - Johant Lakey-Beitia
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX 78249, USA. and Centre for Biodiversity and Drug Discovery, Institute for Scientific Research and High Technology Services (INDICASAT-AIP), City of Knowledge, Panama City, Republic of Panama and Department of Biotechnology, Acharya Nagarjuna University, Nagarjuna Nagar, India
| | - Jessica E Burch
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX 78249, USA.
| | - Hadi D Arman
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX 78249, USA.
| | - Oleg V Larionov
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX 78249, USA.
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28
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Shimbayashi T, Okamoto K, Ohe K. Iron-Catalyzed Aminative Cyclization/Intermolecular Homolytic Aromatic Substitution Using Oxime Esters and Simple Arenes. Chem Asian J 2018; 13:395-399. [DOI: 10.1002/asia.201701634] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 12/12/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Takuya Shimbayashi
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Nishikyo-ku Kyoto 615-8510 Japan
| | - Kazuhiro Okamoto
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Nishikyo-ku Kyoto 615-8510 Japan
| | - Kouichi Ohe
- Department of Energy and Hydrocarbon Chemistry; Graduate School of Engineering; Kyoto University; Nishikyo-ku Kyoto 615-8510 Japan
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29
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Sinha S, Das S, Sikari R, Parua S, Brandaõ P, Demeshko S, Meyer F, Paul ND. Redox Noninnocent Azo-Aromatic Pincers and Their Iron Complexes. Isolation, Characterization, and Catalytic Alcohol Oxidation. Inorg Chem 2017; 56:14084-14100. [PMID: 29120616 DOI: 10.1021/acs.inorgchem.7b02238] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The new redox-noninnocent azoaromatic pincers 2-(arylazo)-1,10-phenanthroline (L1) and 2,9-bis(phenyldiazo)-1,10-phenanthroline (L2) are reported. The ligand L1 is a tridentate pincer having NNN donor atoms, whereas L2 is tetradentate having two azo-N donors and two N-donor atoms from the 1,10-phenanthroline moiety. Reaction of FeCl2 with L1 or L2 produced the pentacoordinated mixed-ligand Fe(II) complexes FeL1Cl2 (1) and FeL2Cl2 (2), respectively. Homoleptic octahedral Fe(II) complexes, mer-[Fe(L1)2](ClO4)2 [3](ClO4)2 and mer-[Fe(L2)2](ClO4)2 [4](ClO4)2, have been synthesized from the reaction of hydrated Fe(ClO4)2 and L1 or L2. The ligand L2, although having four donor sites available for coordination, binds the iron center in a tridentate fashion with one uncoordinated pendant azo function. Molecular and electronic structures of the isolated complexes have been scrutinized thoroughly by various spectroscopic techniques, single-crystal X-ray crystallography, and density functional theory. Beyond mere characterization, complexes 1 and 2 were successfully used as catalysts for the aerobic oxidation of primary and secondary benzylic alcohols. A wide variety of substituted benzyl alcohols were found to be converted to the corresponding carbonyl compounds in high yields, catalyzed by complex 1. Several control reactions were carried out to understand the mechanism of this alcohol oxidation reactions.
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Affiliation(s)
- Suman Sinha
- Department of Chemistry, Indian Institute of Engineering Science and Technology , Shibpur, Botanic Garden, Howrah 711103, India
| | - Siuli Das
- Department of Chemistry, Indian Institute of Engineering Science and Technology , Shibpur, Botanic Garden, Howrah 711103, India
| | - Rina Sikari
- Department of Chemistry, Indian Institute of Engineering Science and Technology , Shibpur, Botanic Garden, Howrah 711103, India
| | - Seuli Parua
- Department of Chemistry, Indian Institute of Engineering Science and Technology , Shibpur, Botanic Garden, Howrah 711103, India
| | - Paula Brandaõ
- Departamento de Química/CICECO, Universidade de Aveiro , 3810-193 Aveiro, Portugal
| | - Serhiy Demeshko
- Universität Göttingen , Institut für Anorganische Chemie, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Franc Meyer
- Universität Göttingen , Institut für Anorganische Chemie, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Nanda D Paul
- Department of Chemistry, Indian Institute of Engineering Science and Technology , Shibpur, Botanic Garden, Howrah 711103, India
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30
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Ahmed J, P S, Vijaykumar G, Jose A, Raj M, Mandal SK. A new face of phenalenyl-based radicals in the transition metal-free C-H arylation of heteroarenes at room temperature: trapping the radical initiator via C-C σ-bond formation. Chem Sci 2017; 8:7798-7806. [PMID: 29163916 PMCID: PMC5674448 DOI: 10.1039/c7sc02661g] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 09/12/2017] [Indexed: 01/02/2023] Open
Abstract
The radical-mediated transition metal-free approach for the direct C-H bond functionalization of arenes is considered as a cost effective alternative to transition metal-based catalysis. An organic ligand-based radical plays a key role by generating an aryl radical which undergoes a subsequent functionalization process. The design principle of the present study takes advantage of a relatively stable odd alternant hydrocarbon-based phenalenyl (PLY) radical. In this study, the first transition metal-free catalyzed direct C-H arylation of a variety of heteroarenes such as azoles, furan, thiophene and pyridine at room temperature has been reported using a phenalenyl-based radical without employing any photoactivation step. This protocol has been successfully applied to the gram scale synthesis of core moieties of bioactive molecules. The phenalenyl-based radical initiator has been characterized crystallographically by trapping it via the formation of a C-C σ-bond between the phenalenyl radical and solvent-based radical species.
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Affiliation(s)
- Jasimuddin Ahmed
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur-741246 , Kolkata , India . http://swadhin-mandal.weebly.com/ ;
| | - Sreejyothi P
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur-741246 , Kolkata , India . http://swadhin-mandal.weebly.com/ ;
| | - Gonela Vijaykumar
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur-741246 , Kolkata , India . http://swadhin-mandal.weebly.com/ ;
| | - Anex Jose
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur-741246 , Kolkata , India . http://swadhin-mandal.weebly.com/ ;
| | - Manthan Raj
- Zakir Husain Delhi College , University of Delhi , Delhi-110002 , India
| | - Swadhin K Mandal
- Department of Chemical Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur-741246 , Kolkata , India . http://swadhin-mandal.weebly.com/ ;
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31
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Ogawa N, Yamaoka Y, Yamada KI, Takasu K. Synthesis of π-Extended Fluoranthenes via a KHMDS-Promoted Anionic-Radical Reaction Cascade. Org Lett 2017; 19:3327-3330. [PMID: 28590747 DOI: 10.1021/acs.orglett.7b01538] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An unprecedented KHMDS-promoted domino reaction to furnish hydroxyfluoranthenes is described. Biaryl compounds bearing acyl and naphthylalkenyl moieties are transformed into 9-hydroxydibenzo[j,l]fluoranthenes in a single step through the formation of an aromatic and a pentagonal ring system. A variety of fluoranthenes including those with extended π-conjugation, a heteroaromatic ring, and unsymmetrical substituents could be synthesized. Mechanistic studies reveal a unique reaction cascade where KHMDS acts as both a base and a single-electron donor.
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Affiliation(s)
- Naoki Ogawa
- Graduate School of Pharmaceutical Sciences, Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yousuke Yamaoka
- Graduate School of Pharmaceutical Sciences, Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Ken-Ichi Yamada
- Graduate School of Pharmaceutical Sciences, Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kiyosei Takasu
- Graduate School of Pharmaceutical Sciences, Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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32
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Budén ME, Bardagí JI, Puiatti M, Rossi RA. Initiation in Photoredox C–H Functionalization Reactions. Is Dimsyl Anion a Key Ingredient? J Org Chem 2017; 82:8325-8333. [DOI: 10.1021/acs.joc.7b00822] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- María E. Budén
- INFIQC, Departamento de Química
Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba, Argentina
| | - Javier I. Bardagí
- INFIQC, Departamento de Química
Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba, Argentina
| | - Marcelo Puiatti
- INFIQC, Departamento de Química
Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba, Argentina
| | - Roberto A. Rossi
- INFIQC, Departamento de Química
Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba, Argentina
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33
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34
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Liu W, Hou F. Transition-metal-free dehalogenation of aryl halides promoted by phenanthroline/potassium tert -butoxide. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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35
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Zhang Y, Wu X, Hao L, Wong ZR, Lauw SJL, Yang S, Webster RD, Chi YR. Trimerization of enones under air enabled by NHC/NaOtBu via a SET radical pathway. Org Chem Front 2017. [DOI: 10.1039/c6qo00738d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unusual trimerization of enone is disclosed. The reaction proceeds through NHC/NaOtBu-enabled SET radical process as key steps.
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Affiliation(s)
- Yuexia Zhang
- Division of Chemistry & Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
| | - Xingxing Wu
- Division of Chemistry & Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
| | - Lin Hao
- Division of Chemistry & Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
| | - Zeng Rong Wong
- Division of Chemistry & Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
| | - Sherman J. L. Lauw
- Division of Chemistry & Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
| | - Song Yang
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering
- Key Laboratory of Green Pesticide and Agricultural Bioengineering
- Ministry of Education
- Guizhou University
- Guiyang 550025
| | - Richard D. Webster
- Division of Chemistry & Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
| | - Yonggui Robin Chi
- Division of Chemistry & Biological Chemistry
- School of Physical & Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
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36
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Pan C, Zhu J, Chen R, Yu JT. Direct arylation of inactivated benzene with aryl acyl peroxides toward biaryls. Org Biomol Chem 2017; 15:6467-6469. [DOI: 10.1039/c7ob01564j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A direct arylation of inactivated benzene with acyl peroxides toward biaryls under metal-free, base-free and additive-free conditions was developed.
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Affiliation(s)
- Changduo Pan
- School of Chemical and Environmental Engineering
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
| | - Jiawei Zhu
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Rongzhen Chen
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Jin-Tao Yu
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- Changzhou University
- Changzhou 213164
- P. R. China
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37
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38
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To CT, Yang W, Chan KS. Porphyrins and Phthalocyanines Catalyzed Direct CH Arylation. CHINESE J CHEM 2016. [DOI: 10.1002/cjoc.201600442] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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39
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Liu XH, Leng J, Jia SJ, Hao JH, Zhang F, Qin HL, Zhang CP. Copper-mediated aerobic iodination and perfluoroalkylation of boronic acids with (CF 3 ) 2 CFI at room temperature. J Fluor Chem 2016. [DOI: 10.1016/j.jfluchem.2016.07.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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40
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Zhu YW, Shi YX. A fluorous ethylenediamine promoted direct C H arylation of unactivated arenes with aryl halides. J Fluor Chem 2016. [DOI: 10.1016/j.jfluchem.2016.05.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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41
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Barham JP, Coulthard G, Emery KJ, Doni E, Cumine F, Nocera G, John MP, Berlouis LEA, McGuire T, Tuttle T, Murphy JA. KOtBu: A Privileged Reagent for Electron Transfer Reactions? J Am Chem Soc 2016; 138:7402-10. [PMID: 27183183 DOI: 10.1021/jacs.6b03282] [Citation(s) in RCA: 227] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Many recent studies have used KOtBu in organic reactions that involve single electron transfer; in the literature, the electron transfer is proposed to occur either directly from the metal alkoxide or indirectly, following reaction of the alkoxide with a solvent or additive. These reaction classes include coupling reactions of halobenzenes and arenes, reductive cleavages of dithianes, and SRN1 reactions. Direct electron transfer would imply that alkali metal alkoxides are willing partners in these electron transfer reactions, but the literature reports provide little or no experimental evidence for this. This paper examines each of these classes of reaction in turn, and contests the roles proposed for KOtBu; instead, it provides new mechanistic information that in each case supports the in situ formation of organic electron donors. We go on to show that direct electron transfer from KOtBu can however occur in appropriate cases, where the electron acceptor has a reduction potential near the oxidation potential of KOtBu, and the example that we use is CBr4. In this case, computational results support electrochemical data in backing a direct electron transfer reaction.
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Affiliation(s)
- Joshua P Barham
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K.,GlaxoSmithKline Medicines Research Centre , Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Graeme Coulthard
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Katie J Emery
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Eswararao Doni
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Florimond Cumine
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Giuseppe Nocera
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Matthew P John
- GlaxoSmithKline Medicines Research Centre , Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Leonard E A Berlouis
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Thomas McGuire
- AstraZeneca R&D , The Darwin Building, Milton Road, Milton, Cambridge CB4 0FZ, U.K
| | - Tell Tuttle
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - John A Murphy
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
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42
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Zhang L, Yang H, Jiao L. Revisiting the Radical Initiation Mechanism of the Diamine-Promoted Transition-Metal-Free Cross-Coupling Reaction. J Am Chem Soc 2016; 138:7151-60. [DOI: 10.1021/jacs.6b03442] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Li Zhang
- Center of Basic Molecular
Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Huan Yang
- Center of Basic Molecular
Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Lei Jiao
- Center of Basic Molecular
Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
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43
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Barham JP, Coulthard G, Kane RG, Delgado N, John MP, Murphy JA. Double Deprotonation of Pyridinols Generates Potent Organic Electron-Donor Initiators for Haloarene-Arene Coupling. Angew Chem Int Ed Engl 2016; 55:4492-6. [DOI: 10.1002/anie.201511847] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 02/05/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Joshua P. Barham
- WestCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow G1 1XL UK
- GlaxoSmithKline Medicines Research Centre; Gunnels Wood Road Stevenage SG1 2NY UK
| | - Graeme Coulthard
- WestCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow G1 1XL UK
| | - Ryan G. Kane
- WestCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow G1 1XL UK
| | - Nathan Delgado
- WestCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow G1 1XL UK
| | - Matthew P. John
- GlaxoSmithKline Medicines Research Centre; Gunnels Wood Road Stevenage SG1 2NY UK
| | - John A. Murphy
- WestCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow G1 1XL UK
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44
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Barham JP, Coulthard G, Kane RG, Delgado N, John MP, Murphy JA. Double Deprotonation of Pyridinols Generates Potent Organic Electron-Donor Initiators for Haloarene-Arene Coupling. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511847] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Joshua P. Barham
- WestCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow G1 1XL UK
- GlaxoSmithKline Medicines Research Centre; Gunnels Wood Road Stevenage SG1 2NY UK
| | - Graeme Coulthard
- WestCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow G1 1XL UK
| | - Ryan G. Kane
- WestCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow G1 1XL UK
| | - Nathan Delgado
- WestCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow G1 1XL UK
| | - Matthew P. John
- GlaxoSmithKline Medicines Research Centre; Gunnels Wood Road Stevenage SG1 2NY UK
| | - John A. Murphy
- WestCHEM; Department of Pure and Applied Chemistry; University of Strathclyde; 295 Cathedral Street Glasgow G1 1XL UK
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45
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Patil M. Mechanistic Insights into the Initiation Step of the Base Promoted Direct C–H Arylation of Benzene in the Presence of Additive. J Org Chem 2015; 81:632-9. [DOI: 10.1021/acs.joc.5b02438] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mahendra Patil
- UM-DAE
Centre for Excellence
in Basic Sciences Health Centre, University of Mumbai Vidyanagari Campus, Kalina, Santacruz (East), Mumbai 400098, India
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46
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Rossi R, Lessi M, Manzini C, Marianetti G, Bellina F. Transition Metal-Free Direct CH (Hetero)arylation of Heteroarenes: A Sustainable Methodology to Access (Hetero)aryl-Substituted Heteroarenes. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500799] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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47
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Pichette Drapeau M, Fabre I, Grimaud L, Ciofini I, Ollevier T, Taillefer M. Transition-Metal-Free α-Arylation of Enolizable Aryl Ketones and Mechanistic Evidence for a Radical Process. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502332] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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48
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Ligand-controlled chemoselectivity in potassium tert-amylate-promoted direct C–H arylation of unactivated benzene with aryl halides. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.05.082] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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49
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Pichette Drapeau M, Fabre I, Grimaud L, Ciofini I, Ollevier T, Taillefer M. Transition-Metal-Free α-Arylation of Enolizable Aryl Ketones and Mechanistic Evidence for a Radical Process. Angew Chem Int Ed Engl 2015; 54:10587-91. [PMID: 26136406 DOI: 10.1002/anie.201502332] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 05/11/2015] [Indexed: 11/10/2022]
Abstract
The α-arylation of enolizable aryl ketones can be carried out with aryl halides under transition-metal-free conditions using KOtBu in DMF. The α-aryl ketones thus obtained can be used for step- and cost-economic syntheses of fused heterocycles and Tamoxifen. Mechanistic studies demonstrate the synergetic role of base and solvent for the initiation of the radical process.
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Affiliation(s)
- Martin Pichette Drapeau
- Institut Charles Gerhardt Montpellier, ENSCM, 8 rue de l'Ecole Normale, 34296 Montpellier (France).,Département de chimie, Pavillon Alexandre-Vachon, Université Laval, 1045 avenue de la Médecine, Québec (Qc) G1V 0A6 (Canada)
| | - Indira Fabre
- UPMC-ENS-CNRS-UMR 8640, Ecole Normale Supérieure, Département de chimie 24 rue Lhomond, 75231 Paris (France).,Institut de Recherche de Chimie Paris, CNRS-Chimie ParisTech, 11 rue Pierre et Marie Curie, 75005 Paris (France)
| | - Laurence Grimaud
- UPMC-ENS-CNRS-UMR 8640, Ecole Normale Supérieure, Département de chimie 24 rue Lhomond, 75231 Paris (France)
| | - Ilaria Ciofini
- Institut de Recherche de Chimie Paris, CNRS-Chimie ParisTech, 11 rue Pierre et Marie Curie, 75005 Paris (France)
| | - Thierry Ollevier
- Département de chimie, Pavillon Alexandre-Vachon, Université Laval, 1045 avenue de la Médecine, Québec (Qc) G1V 0A6 (Canada)
| | - Marc Taillefer
- Institut Charles Gerhardt Montpellier, ENSCM, 8 rue de l'Ecole Normale, 34296 Montpellier (France).
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50
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Z-selective, anti-Markovnikov addition of alkoxides to terminal alkynes: an electron transfer pathway? Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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