51
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Li Y, Zhao X. Gold-catalyzed domino cyclization enabling construction of diverse fused azaspiro tetracyclic scaffolds: a cascade catalysis mechanism due to a substrate and counterion. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00120a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The detailed mechanism and origins of gold-catalyzed domino cyclization to diverse fused azaspiro tetracyclic scaffolds by cooperative dual catalysis and cascade catalysis are systematically studied.
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Affiliation(s)
- Yunhe Li
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an710049
| | - Xiang Zhao
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an710049
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52
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Quirós MT, Gómez-Bengoa E, Muñoz MP. Unravelling mechanistic insights in the platinum-catalysed dihydroalkoxylation of allenes. PURE APPL CHEM 2019. [DOI: 10.1515/pac-2019-0214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The mechanism of the platinum-catalysed dihydroalkoxylation of allenes to give acetals has been studied experimentally and by computational methods. Our findings further explain divergent reactivity encountered for platinum- and gold-vinyl intermediates after the first nucleophilic attack onto the coordinated allene, as well as provide new details on the catalytic cycle with platinum, uncovering enol ethers as resting states of the catalytic cycle, a SEOx process via Pt(IV)–H as the final protodemetallation step after the second nucleophilic attack when neutral platinum complexes are used, and a fast acid promoted addition of methanol to enol ethers when cationic platinum complexes are employed.
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Affiliation(s)
- María Teresa Quirós
- School of Chemistry , University of East Anglia , Earlham Road , Norwich , NR4 7TJ , UK
| | - Enrique Gómez-Bengoa
- Departamento de Química Orgánica , Universidad del País Vasco , Apt. 1072 , 20080 San Sebastián , Spain
| | - María Paz Muñoz
- School of Chemistry , University of East Anglia , Earlham Road , Norwich , NR4 7TJ , UK
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53
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Liu Y, Liu P, Ling B, Chen G, Chen T, Li Y, Bi S, Zhang D. Mechanistic Investigation of Au(III)-Catalyzed Cycloisomerizations of N
-Propargylcarboxamides. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Yuxia Liu
- Key Lab of Colloid and Interface Chemistry; Ministry of Education; Institute of Theoretical Chemistry; Shandong University; 250100 Jinan P. R. China
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu P. R. China
| | - Peng Liu
- Key Lab of Colloid and Interface Chemistry; Ministry of Education; Institute of Theoretical Chemistry; Shandong University; 250100 Jinan P. R. China
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu P. R. China
| | - Baoping Ling
- Key Lab of Colloid and Interface Chemistry; Ministry of Education; Institute of Theoretical Chemistry; Shandong University; 250100 Jinan P. R. China
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu P. R. China
| | - Guang Chen
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu P. R. China
| | - Tao Chen
- Key Laboratory of Tibetan Medicine Research & Qinghai Key Laboratory of Qinghai-Tibet Plateau Biological Resources; Northwest Institute of Plateau Biology; Chinese Academy of Science; 810001 Xining Qinghai P. R. China
| | - Yulin Li
- Key Laboratory of Tibetan Medicine Research & Qinghai Key Laboratory of Qinghai-Tibet Plateau Biological Resources; Northwest Institute of Plateau Biology; Chinese Academy of Science; 810001 Xining Qinghai P. R. China
| | - Siwei Bi
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu P. R. China
| | - Dongju Zhang
- Key Lab of Colloid and Interface Chemistry; Ministry of Education; Institute of Theoretical Chemistry; Shandong University; 250100 Jinan P. R. China
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54
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Nomiya K, Murara Y, Iwasaki Y, Arai H, Yoshida T, Chikaraishi Kasuga N, Matsubara T. Highly active, homogeneous catalysis by polyoxometalate-assisted N-heterocyclic carbene gold(I) complexes for hydration of diphenylacetylene. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.02.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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55
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Sotorríos L, Demertzidou VP, Zografos AL, Gómez-Bengoa E. DFT studies on metal-catalyzed cycloisomerization of trans-1,5-enynes to cyclopropane sesquiterpenoids. Org Biomol Chem 2019; 17:5112-5120. [DOI: 10.1039/c9ob00890j] [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
DFT studies reveal the distinct fates of 1,2- and 1,3-acetate migration in the cycloisomerization reaction of 1,5-enynes and the significant differences between platinum(ii) and gold(i) catalysis.
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Affiliation(s)
- Lia Sotorríos
- Department of Organic Chemistry I
- Faculty of Chemistry
- University of the Basque Country
- Donostia – San Sebastián
- Spain
| | - Vera P. Demertzidou
- Aristotle University of Thessaloniki
- University Main Campus
- Chemical Department
- Laboratory of Organic Chemistry
- Thessaloniki
| | - Alexandros L. Zografos
- Aristotle University of Thessaloniki
- University Main Campus
- Chemical Department
- Laboratory of Organic Chemistry
- Thessaloniki
| | - Enrique Gómez-Bengoa
- Department of Organic Chemistry I
- Faculty of Chemistry
- University of the Basque Country
- Donostia – San Sebastián
- Spain
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56
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Zhou L, Yang L, Zhang Y, Kirillov AM, Fang R, Han B. Theoretical study on the mechanism and chemoselectivity in gold(i)-catalyzed cycloisomerization of β,β-disubstituted ortho-(alkynyl)styrenes. Org Chem Front 2019. [DOI: 10.1039/c9qo00534j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The mechanism and chemoselectivity of gold(i)-catalyzed cycloadditions of β,β-disubstituted ortho-(alkynyl)styrenes were explored by DFT calculations.
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Affiliation(s)
- Lin Zhou
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Li Yang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Yanwen Zhang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Alexander M. Kirillov
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- Lisbon
- Portugal
| | - Ran Fang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Bing Han
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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57
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Zarkoob F, Ariafard A. Mechanistic Elucidation of Gold(I)-Catalyzed Oxidation of a Propargylic Alcohol by a N-Oxide in the Presence of an Imine Using DFT Calculations. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00808] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Fatemeh Zarkoob
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran, Iran
| | - Alireza Ariafard
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran, Iran
- School of Natural Sciences (Chemistry), University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
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58
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Theoretical investigation of gold(I)-catalyzed intramolecular SEAr in isoxazole derivatives: Mechanisms, origin of regioselectivity, and role of hydrogen acceptor. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.09.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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59
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Muratore ME, Konovalov AI, Armengol-Relats H, Echavarren AM. Diastereospecific Gold(I)-Catalyzed Cyclization Cascade for the Controlled Preparation of N- and N,O-Heterocycles. Chemistry 2018; 24:15613-15621. [PMID: 30066978 DOI: 10.1002/chem.201802770] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 07/25/2018] [Indexed: 11/11/2022]
Abstract
The reaction of oxime-tethered 1,6-enynes with a cationic gold(I) catalyst demonstrates a great potential for the synthesis of a range of heterocycles in a diastereospecific fashion. The control of the configuration of the oxime and the alkene of the enyne moiety is the key to selectively obtain dihydro-1,2-oxazines, isoxazolines or dihydropyrrole-N-oxides as single diastereoisomers. As supported by DFT calculations, these cascade reactions proceed stepwise, by the intramolecular addition of the O or N atom of the oxime onto cyclopropyl gold(I) carbene intermediates. In this study, a rare [3,3]-sigmatropic rearrangement of nitrones is also observed.
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Affiliation(s)
- Michael E Muratore
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Andrey I Konovalov
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Helena Armengol-Relats
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, 43007, Tarragona, Spain.,Departament de Química Orgànica i Analítica, Universitat Rovira I Virgili, C/ Marcel⋅lí Domingo s/n, 43007, Tarragona, Spain
| | - Antonio M Echavarren
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, 43007, Tarragona, Spain.,Departament de Química Orgànica i Analítica, Universitat Rovira I Virgili, C/ Marcel⋅lí Domingo s/n, 43007, Tarragona, Spain
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60
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Guo W, Li L, Ding Q, Lin X, Liu X, Wang K, Liu Y, Fan H, Li C. Synthesis of Chiral Trispirocyclic Oxindoles via Organic-Base/Au(I)-Catalyzed Sequential Reactions. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02157] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Wengang Guo
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Lu Li
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Qian Ding
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Xiangfeng Lin
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Xianghui Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Kai Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Yan Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Hongjun Fan
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
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61
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Zhou L, Zhang Y, Fang R, Yang L. Computational Exploration of Counterion Effects in Gold(I)-Catalyzed Cycloisomerization of ortho-(Alkynyl)styrenes. ACS OMEGA 2018; 3:9339-9347. [PMID: 31459067 PMCID: PMC6644738 DOI: 10.1021/acsomega.8b01131] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 07/12/2018] [Indexed: 06/10/2023]
Abstract
A detailed theoretical analysis of the mechanism and chemoselectivity for gold(I)-catalyzed reaction of o-(alkynyl)styrene containing an isopropyl and a methyl at the terminal position of the alkene has been reported in this work. Two different counterions (SbF6 - and OTs-) were studied as model catalysts. According to our calculation, for SbF6 -, the reaction pathway is more prone to direct 1,2-H shifts (isopropyl H) than the elimination and ring expansion pathway. However, an elimination pathway affords the indenyl derivative by forming p-toluenesulfonic acid (HOTs), which may be the main pathway in the presence of OTs-. The chemoselectivity for the title reaction is mainly determined by the electronic effect of the counterion and the substituent rather than the steric effect. In other words, less basic SbF6 - mainly provides the charge separation effect rather than assisted proton elimination. However, the more basic OTs- mainly assist proton elimination through the formation of HOTs. In addition to the good agreement with the experimental data, the density functional theory results also provide a significant contribution to the understanding of the reaction mechanism.
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Affiliation(s)
- Lin Zhou
- State
Key Laboratory of Applied Organic Chemistry and College of
Chemistry and Chemical Engineering, and Key Laboratory of Nonferrous Metals
Chemistry and Resources Utilization of Gansu Province, Lanzhou University, No. 222 Tianshui South Road, Lanzhou 730000, P. R.
China
| | - Yanwen Zhang
- State
Key Laboratory of Applied Organic Chemistry and College of
Chemistry and Chemical Engineering, and Key Laboratory of Nonferrous Metals
Chemistry and Resources Utilization of Gansu Province, Lanzhou University, No. 222 Tianshui South Road, Lanzhou 730000, P. R.
China
| | - Ran Fang
- State
Key Laboratory of Applied Organic Chemistry and College of
Chemistry and Chemical Engineering, and Key Laboratory of Nonferrous Metals
Chemistry and Resources Utilization of Gansu Province, Lanzhou University, No. 222 Tianshui South Road, Lanzhou 730000, P. R.
China
| | - Lizi Yang
- State
Key Laboratory of Applied Organic Chemistry and College of
Chemistry and Chemical Engineering, and Key Laboratory of Nonferrous Metals
Chemistry and Resources Utilization of Gansu Province, Lanzhou University, No. 222 Tianshui South Road, Lanzhou 730000, P. R.
China
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62
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Zhang B, Wang T. Gold-Catalyzed Transformations of Propargyl Alcohols and Propargyl Amines. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800324] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Bing Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering; Shaanxi Normal University; No.620 West Chang'an Avenue Xi'an 710119 China
| | - Tao Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering; Shaanxi Normal University; No.620 West Chang'an Avenue Xi'an 710119 China
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63
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Sun Z, Pan J, Guo J, Yan F. The Alkaline Stability of Anion Exchange Membrane for Fuel Cell Applications: The Effects of Alkaline Media. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1800065. [PMID: 30128234 PMCID: PMC6097010 DOI: 10.1002/advs.201800065] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 04/21/2018] [Indexed: 06/08/2023]
Abstract
Alkaline alcohols (methanol, ethanol, propanol, and ethylene glycol) have been applied as fuels for alkaline anion exchange membrane fuel cells. However, the effects of alkaline media on the stability of anion exchange membranes (AEMs) are still elusive. Here, a series of organic cations including quaternary ammonium, imidazolium, benzimidazolium, pyridinium, phosphonium, pyrrolidinium cations, and their corresponding cationic polymers are synthesized and systematically investigated with respect to their chemical stability in various alkaline media (water, methanol, ethanol, and dimethyl sulfoxide) by quantitative 1H nuclear magnetic resonance spectroscopy and density functional theory calculations. In the case of protic solvents (water, methanol, and ethanol), the lower dielectric constant of the alkaline media, the lower is the lowest unoccupied molecular orbital (LUMO) energy of the organic cation, which leads to the lower alkaline stability of cations. However, the hydrogen bonds between the anions and protic solvents weaken the effects of low dielectric constant of the alkaline media. The aprotic solvent accelerated the SN2 degradation reaction of "naked" organic cations. The results of this study suggest that both the chemical structure of organic cations and alkaline media (fuels) applied affect the alkaline stability of AEMs.
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Affiliation(s)
- Zhe Sun
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsDepartment of Polymer Science and EngineeringCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou215123China
| | - Ji Pan
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsDepartment of Polymer Science and EngineeringCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou215123China
| | - Jiangna Guo
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsDepartment of Polymer Science and EngineeringCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou215123China
| | - Feng Yan
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsDepartment of Polymer Science and EngineeringCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou215123China
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64
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Heidrich M, Bergmann M, Müller-Borges D, Plenio H. Bispentiptycenyl-N-Heterocyclic Carbene (NHC) Gold Complexes: Highly Active Catalysts for the Room Temperature Hydration of Alkynes. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800605] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Maximillian Heidrich
- Organometallic Chemistry; TU Darmstadt; Alarich-Weiss-Str. 12 64287 Darmstadt Germany
| | - Marvin Bergmann
- Organometallic Chemistry; TU Darmstadt; Alarich-Weiss-Str. 12 64287 Darmstadt Germany
| | - Dorian Müller-Borges
- Organometallic Chemistry; TU Darmstadt; Alarich-Weiss-Str. 12 64287 Darmstadt Germany
| | - Herbert Plenio
- Organometallic Chemistry; TU Darmstadt; Alarich-Weiss-Str. 12 64287 Darmstadt Germany
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65
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Lin J, Zhang S, Guan W, Yang G, Ma Y. Gold with +4 and +6 Oxidation States in AuF4 and AuF6. J Am Chem Soc 2018; 140:9545-9550. [DOI: 10.1021/jacs.8b04563] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
| | | | | | | | - Yanming Ma
- State Key Lab of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
- Innovation Center for Computational Physics Method and Software, College of Physics, Jilin University, Changchun 130012, China
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66
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Fang R, Zhou L, Tu PC, Kirillov AM, Yang L. Computational Study on Gold-Catalyzed Cascade Reactions of 1,4-Diynes and Pyrroles: Mechanism, Regioselectivity, Role of Catalyst, and Effects of Substituent and Solvent. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00201] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ran Fang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Lin Zhou
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Peng-Cheng Tu
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Alexander M. Kirillov
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Lizi Yang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
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67
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Li Z, Song L, Van Meervelt L, Tian G, Van der Eycken EV. Cationic Gold(I)-Catalyzed Cascade Bicyclizations for Divergent Synthesis of (Spiro)polyheterocycles. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01789] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | | | | | | | - Erik V. Van der Eycken
- Peoples’ Friendship University of Russia (RUDN University)
, 6 Miklukho-Maklaya Street, Moscow 117198, Russia
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68
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Wang J, Zhang S, Wojtas L, Shi X. Highly Efficient and Stereoselective Thioallylation of Alkynes: Possible Gold Redox Catalysis with No Need for a Strong Oxidant. Angew Chem Int Ed Engl 2018; 57:6915-6920. [PMID: 29663659 PMCID: PMC6121218 DOI: 10.1002/anie.201802540] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Indexed: 11/07/2022]
Abstract
Stereoselective thioallylation of alkynes under possible gold redox catalysis was accomplished with high efficiency (as low as 0.1 % catalyst loading, up to 99 % yield) and broad substrate scope (various alkynes, inter- and intramolecular fashion). The gold(I) catalyst acts as both a π-acid for alkyne activation and a redox catalyst for AuI/III coupling, whereas the sulfonium cation generated in situ functions as a mild oxidant. This novel methodology provides an exciting system for gold redox catalysis without the need for a strong oxidant.
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Affiliation(s)
- Jin Wang
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Shuyao Zhang
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Lukasz Wojtas
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Xiaodong Shi
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
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69
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Wei LS, He GX, Kong XF, Pan CX, Mo DL, Su GF. Gold(III)-Catalyzed Selective Cyclization of Alkynyl Quinazolinone-Tethered Pyrroles: Synthesis of Fused Quinazolinone Scaffolds. J Org Chem 2018; 83:6719-6727. [DOI: 10.1021/acs.joc.8b00168] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Lin-Su Wei
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Guo-Xue He
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Xiang-Fei Kong
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
- College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jian Gan Road, Guilin 541004, China
| | - Cheng-Xue Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Dong-Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
| | - Gui-Fa Su
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin 541004, China
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70
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Chipman A, Gouranourimi A, Farshadfar K, Olding A, Yates BF, Ariafard A. A Computational Mechanistic Investigation into Reduction of Gold(III) Complexes by Amino Acid Glycine: A New Variant for Amine Oxidation. Chemistry 2018; 24:8361-8368. [PMID: 29655208 DOI: 10.1002/chem.201800403] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 04/02/2018] [Indexed: 01/10/2023]
Abstract
Density functional theory (DFT) was utilized to explore the reduction of gold(III) complexes by the amino acid glycine (Gly). Interestingly, when the nitrogen atom of Gly coordinates to the gold(III) center, its Cα -hydrogen atom becomes so acidic that it can be easily deprotonated by a mild base like water. The deprotonation converts the amino acid into a potent reductant by which gold(III) is reduced to gold(I) with a moderate activation energy. To our knowledge, this is the first contribution suggesting that primary amines are oxidized to imines via direct α-carbon deprotonation. This finding may provide new insights into the mechanistic interpretation of amine oxidations catalyzed/mediated by a center with high cathodic reduction potential. This work also provides a rationalization behind why gold(III) complexes with amine-based polydentate ligands are reluctant to undergo a redox process. Gold(III) reduction occurs most efficiently if the Cα proton leaves in the plane of the Cα , N and Au atoms. Chelation prevents this alignment, resulting in the gold(III) complex being unreactive toward reduction. It has been experimentally found that gold(III) is capable of oxidizing Gly to glyoxylic acid (GA) as the initial product. The latter, in the presence of another gold(III) complex, has been reported to undergo oxidative decarboxylation to afford CO2 and HCOOH. This process is found to be mediated by formation of a geminal diol intermediate produced by reaction of water with the aldehyde functional group of the coordinated GA.
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Affiliation(s)
- Antony Chipman
- School of Physical Sciences (Chemistry), University of Tasmania, Private Bag 75, Hobart, TAS, 7001, Australia
| | - Ali Gouranourimi
- School of Physical Sciences (Chemistry), University of Tasmania, Private Bag 75, Hobart, TAS, 7001, Australia
| | - Kaveh Farshadfar
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Shohrak Gharb, Tehran, Iran
| | - Angus Olding
- School of Physical Sciences (Chemistry), University of Tasmania, Private Bag 75, Hobart, TAS, 7001, Australia
| | - Brian F Yates
- School of Physical Sciences (Chemistry), University of Tasmania, Private Bag 75, Hobart, TAS, 7001, Australia
| | - Alireza Ariafard
- School of Physical Sciences (Chemistry), University of Tasmania, Private Bag 75, Hobart, TAS, 7001, Australia.,Department of Chemistry, Islamic Azad University, Central Tehran Branch, Shohrak Gharb, Tehran, Iran
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71
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Sorbelli D, Belpassi L, Tarantelli F, Belanzoni P. Ligand Effect on Bonding in Gold(III) Carbonyl Complexes. Inorg Chem 2018; 57:6161-6175. [PMID: 29741374 DOI: 10.1021/acs.inorgchem.8b00765] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We quantitatively assess the Dewar-Chatt-Duncanson (DCD) components of the Au(III)-CO bond and the charge density polarization at the CO, in a series of neutral, cationic, and dicationic bis- and monocyclometalated gold(III) complexes via charge-displacement (CD) analysis. A striking feature concerns the very small net electron charge flux from CO to the metal fragment which is unexpectedly stable toward both the charge of the complex and the oxidation state of gold (I, III). All systems exhibit a similar trend for the σ charge rearrangement in the region of the carbonyl bond, where, by contrast, the π back-donation trend variation is large, which is strictly correlated to the change in CO bond distance and the shift in CO stretching frequencies, in close analogy with the gold(I) carbonyl complexes. In the whole series of gold(III) compounds, a large Au(III) ← CO σ donation is measured (from 0.19 to 0.31 electrons), as well as a significant Au(III) → CO π back-donation (from -0.09 to -0.22 electrons), which however is not generally able to completely balance the polarization of the CO π electrons in the direction from oxygen to carbon (C ← O) induced by the presence of the metal fragment [LAu(III)]0/+1/+2. Surprisingly, all the gold(III) complexes in the series are characterized by a very small anisotropy in the Au(III) → CO in-plane and out-of-plane π back-donation components, in sharp contrast with the marked anisotropy found before for the experimentally characterized [(C^N^C)Au(III)CO]+ complex. A first attempt to figure out a rationale on the bonding/reactivity relationship for Au(III)-CO is made by performing a comparative study with an isostructural [(N^N^C)Pt(II)CO]+ complex in a model water-gas shift (WGS) reaction.
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Affiliation(s)
| | - Leonardo Belpassi
- Consortium for Computational Molecular and Materials Sciences (CMS)2 , via Elce di Sotto 8 , I-06123 Perugia , Italy
| | - Francesco Tarantelli
- Consortium for Computational Molecular and Materials Sciences (CMS)2 , via Elce di Sotto 8 , I-06123 Perugia , Italy
| | - Paola Belanzoni
- Consortium for Computational Molecular and Materials Sciences (CMS)2 , via Elce di Sotto 8 , I-06123 Perugia , Italy
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72
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Wang J, Zhang S, Xu C, Wojtas L, Akhmedov NG, Chen H, Shi X. Highly Efficient and Stereoselective Thioallylation of Alkynes: Possible Gold Redox Catalysis with No Need for a Strong Oxidant. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802540] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jin Wang
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Shuyao Zhang
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Chang Xu
- Department of Chemistry and Biochemistry Ohio University Athens OH 45791 USA
| | - Lukasz Wojtas
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Novruz G. Akhmedov
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown WV 26506 USA
| | - Hao Chen
- Department of Chemistry and Biochemistry Ohio University Athens OH 45791 USA
| | - Xiaodong Shi
- Department of Chemistry University of South Florida Tampa FL 33620 USA
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73
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De Canck E, Nahra F, Bevernaege K, Vanden Broeck S, Ouwehand J, Maes D, Nolan SP, Van Der Voort P. PMO-Immobilized Au I -NHC Complexes: Heterogeneous Catalysts for Sustainable Processes. Chemphyschem 2018; 19:430-436. [PMID: 29115710 DOI: 10.1002/cphc.201701102] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Indexed: 12/14/2022]
Abstract
A stable periodic mesoporous organosilica (PMO) with accessible sulfonic acid functionalities is prepared via a one-pot-synthesis and is used as solid support for highly active catalysts, consisting of gold(I)-N-heterocyclic carbene (NHC) complexes. The gold complexes are successfully immobilized on the nanoporous hybrid material via a straightforward acid-base reaction with the corresponding [Au(OH)(NHC)] synthon. This catalyst design strategy results in a boomerang-type catalyst, allowing the active species to detach from the surface to perform the catalysis and then to recombine with the solid after all the starting material is consumed. This boomerang behavior is assessed in the hydration of alkynes. The tested catalysts were found to be active in the latter reaction, and after an acidic work-up, the IPr*-based gold catalyst can be recovered and then reused several times without any loss in efficiency.
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Affiliation(s)
- Els De Canck
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Fady Nahra
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Kevin Bevernaege
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium.,Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Sofie Vanden Broeck
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Judith Ouwehand
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Diederick Maes
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium.,Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Steven P Nolan
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Pascal Van Der Voort
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
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74
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Hunter AC, Schlitzer SC, Stevens JC, Almutwalli B, Sharma I. A Convergent Approach to Diverse Spiroethers through Stereoselective Trapping of Rhodium Carbenoids with Gold-Activated Alkynols. J Org Chem 2018; 83:2744-2752. [DOI: 10.1021/acs.joc.7b03196] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arianne C. Hunter
- Department of Chemistry and
Biochemistry, and Institute of Natural Products Applications and Research
Technologies, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73071,United States
| | - Steven C. Schlitzer
- Department of Chemistry and
Biochemistry, and Institute of Natural Products Applications and Research
Technologies, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73071,United States
| | - Joseph C. Stevens
- Department of Chemistry and
Biochemistry, and Institute of Natural Products Applications and Research
Technologies, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73071,United States
| | - Bilal Almutwalli
- Department of Chemistry and
Biochemistry, and Institute of Natural Products Applications and Research
Technologies, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73071,United States
| | - Indrajeet Sharma
- Department of Chemistry and
Biochemistry, and Institute of Natural Products Applications and Research
Technologies, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73071,United States
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75
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Lu M, Su Y, Zhao P, Ye X, Cai Y, Shi X, Masson E, Li F, Campbell JL, Chen H. Direct Evidence for the Origin of Bis-Gold Intermediates: Probing Gold Catalysis with Mass Spectrometry. Chemistry 2018; 24:2144-2150. [PMID: 29131927 PMCID: PMC6139295 DOI: 10.1002/chem.201703666] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Indexed: 11/11/2022]
Abstract
Gold-catalyzed alkyne hydration was studied by using in situ reacting mass spectrometry (MS) technology. By monitoring the reaction process in solution under different conditions (regular and very diluted catalyst concentrations, different pH values) and examining the reaction occurrence in the early reaction stage (1-2 ms after mixing) with MS, we collected a series of experimental evidence to support that the bis-gold complex is a potential key reaction intermediate. Furthermore, both experimental and computational studies confirmed that the σ,π-bis-gold complexes are not active intermediates toward nucleophilic addition. Instead, formation of geminally diaurated complex C is crucial for this catalytic process.
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Affiliation(s)
- Mei Lu
- Center for Intelligent Chemical Instrumentation, Department of Chemistry and Biochemistry & Edison Institute of Biology, Ohio University, Athens, OH, 45701, USA
| | - Yijin Su
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Pengyi Zhao
- Center for Intelligent Chemical Instrumentation, Department of Chemistry and Biochemistry & Edison Institute of Biology, Ohio University, Athens, OH, 45701, USA
| | - Xiaohan Ye
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Yi Cai
- Center for Intelligent Chemical Instrumentation, Department of Chemistry and Biochemistry & Edison Institute of Biology, Ohio University, Athens, OH, 45701, USA
| | - Xiaodong Shi
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Eric Masson
- Center for Intelligent Chemical Instrumentation, Department of Chemistry and Biochemistry & Edison Institute of Biology, Ohio University, Athens, OH, 45701, USA
| | - Fengyao Li
- Center for Intelligent Chemical Instrumentation, Department of Chemistry and Biochemistry & Edison Institute of Biology, Ohio University, Athens, OH, 45701, USA
| | - J Larry Campbell
- AB Sciex, 71 Four Valley Drive, Concord, Ontario, L4K 4V8, Canada
| | - Hao Chen
- Center for Intelligent Chemical Instrumentation, Department of Chemistry and Biochemistry & Edison Institute of Biology, Ohio University, Athens, OH, 45701, USA
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76
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Li Y, Tu PC, Zhou L, Kirillov AM, Fang R, Yang L. How Does the Catalyst Affect the Reaction Pathway? DFT Analysis of the Mechanism and Selectivity in the 1,6-Diyne Ester Cycloisomerization. Organometallics 2018. [DOI: 10.1021/acs.organomet.7b00813] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yunhe Li
- State
Key Laboratory of Applied Organic Chemistry and Key Laboratory of
Nonferrous Metals Chemistry and Resources Utilization of Gansu Province,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Peng-Cheng Tu
- State
Key Laboratory of Applied Organic Chemistry and Key Laboratory of
Nonferrous Metals Chemistry and Resources Utilization of Gansu Province,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Lin Zhou
- State
Key Laboratory of Applied Organic Chemistry and Key Laboratory of
Nonferrous Metals Chemistry and Resources Utilization of Gansu Province,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Alexander M. Kirillov
- Centro
de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Ran Fang
- State
Key Laboratory of Applied Organic Chemistry and Key Laboratory of
Nonferrous Metals Chemistry and Resources Utilization of Gansu Province,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Lizi Yang
- State
Key Laboratory of Applied Organic Chemistry and Key Laboratory of
Nonferrous Metals Chemistry and Resources Utilization of Gansu Province,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
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77
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Fang R, Zhou L, Tu PC, Yang L. Gold(i)-catalyzed cycloisomerization of ortho-(alkynyl) styrenes: DFT analysis of the crucial role of SbF6− in the elimination of protons. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00367j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The mechanism, regioselectivity and role of SbF6− in the gold(i)-catalyzed reaction of o-(alkynyl) styrene are clarified through our DFT calculations.
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Affiliation(s)
- Ran Fang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Lin Zhou
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Peng-Cheng Tu
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Lizi Yang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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78
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Alcaide B, Almendros P, Martínez del Campo T, Naranjo T. Gold-catalyzed preparation of annelated 2-azetidinones via divergent heterocyclization of enyne-tethered oxazolidines. Org Chem Front 2018. [DOI: 10.1039/c7qo00950j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The divergent and selective syntheses of two types of annelated β-lactams, namely, furan- and tetrahydropyridine-fused 2-azetidinones, have been accomplished directly from 2-azetidinone-tethered oxazolidine-enynes through gold catalysis.
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Affiliation(s)
- Benito Alcaide
- Grupo de Lactamas y Heterociclos Bioactivos
- Departamento de Química Orgánica I
- Unidad Asociada al CSIC
- Facultad de Química
- Universidad Complutense de Madrid
| | - Pedro Almendros
- Instituto de Química Orgánica General
- Consejo Superior de Investigaciones Científicas
- IQOG-CSIC
- 28006 Madrid
- Spain
| | - Teresa Martínez del Campo
- Grupo de Lactamas y Heterociclos Bioactivos
- Departamento de Química Orgánica I
- Unidad Asociada al CSIC
- Facultad de Química
- Universidad Complutense de Madrid
| | - Teresa Naranjo
- Grupo de Lactamas y Heterociclos Bioactivos
- Departamento de Química Orgánica I
- Unidad Asociada al CSIC
- Facultad de Química
- Universidad Complutense de Madrid
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79
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Liu R, Wang Q, Wei Y, Shi M. Synthesis of indolizine derivatives containing eight-membered rings via a gold-catalyzed two-fold hydroarylation of diynes. Chem Commun (Camb) 2018; 54:1225-1228. [DOI: 10.1039/c7cc09250d] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel strategy for a gold(i)-catalyzed synthesis of indolizine derivatives containing eight-membered rings has been developed, which may have potential usefulness as blue or green OLEDs.
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Affiliation(s)
- Ruixing Liu
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- University of Chinese Academy of Sciences
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
| | - Qiang Wang
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- University of Chinese Academy of Sciences
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- University of Chinese Academy of Sciences
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- University of Chinese Academy of Sciences
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
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80
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Jiang KM, Kang JA, Jin Y, Lin J. Synthesis of substituted 4-hydroxyalkyl-quinoline derivatives by a three-component reaction using CuCl/AuCl as sequential catalysts. Org Chem Front 2018. [DOI: 10.1039/c7qo00637c] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A new method to construct 4-hydroxyalkyl-quinoline derivatives is described via Cu(i) and Au(i) sequential catalyzed cyclization of anilines with aldehyde derivatives and aliphatic alkynes, respectively.
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Affiliation(s)
- Kun-Ming Jiang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Jing-An Kang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Yi Jin
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
| | - Jun Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University)
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
- Kunming
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81
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Kreuzahler M, Fabig S, Haberhauer G, Gleiter R. Au(I)-Catalyzed Dimerization of Two Alkyne Units-Interplay between Butadienyl and Cyclopropenylmethyl Cation: Model Studies and Trapping Experiments. J Org Chem 2017; 82:13572-13582. [PMID: 29149572 DOI: 10.1021/acs.joc.7b02843] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In recent years, Au(I)-catalyzed reactions proved to be a valuable tool for the synthesis of substituted cycles by cycloaromatization and cycloisomerization starting from alkynes. Despite the myriad of Au(I)-catalyzed reactions of alkynes, the mono Au(I)-catalyzed pendant to the radical dimerization of nonconjugated alkyne units has not been investigated by quantum chemical calculations. Herein, by means of quantum chemical calculations, we describe the mono Au(I)-catalyzed dimerization of two alkyne units as well as the transannular ring closure reaction of a nonconjugated diyne. We found that depending on the system and the method used either the corresponding cyclopropenylmethyl cation or the butadienyl cation represents the stable intermediate. This circumstance could be explained by different stabilizing effects. Moreover, the calculation reveals a dramatic (>1012-fold) acceleration of the Au(I)-catalyzed reaction compared to that of the noncatalyzed radical variant. Trapping experiments with a substituted 1,6-cyclodecadiyne using benzene as a solvent at room temperature as well as studies with deuterated solvents confirm the calculations. In this context, we also demonstrate that trapping of the cationic intermediate with benzene does not proceed via a Friedel-Crafts-type reaction.
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Affiliation(s)
- Mathis Kreuzahler
- Institut für Organische Chemie, Universität Duisburg-Essen , Universitätsstrasse 7, D-45117 Essen, Germany
| | - Sven Fabig
- Institut für Organische Chemie, Universität Duisburg-Essen , Universitätsstrasse 7, D-45117 Essen, Germany
| | - Gebhard Haberhauer
- Institut für Organische Chemie, Universität Duisburg-Essen , Universitätsstrasse 7, D-45117 Essen, Germany
| | - Rolf Gleiter
- Organisch-Chemisches Institut, Universität Heidelberg , Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
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82
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Chaładaj W, Kołodziejczyk A, Domański S. Gold(I)-Catalyzed Conia-ene Cyclization of Internal ϵ
-Acetylenic β-Ketoesters under High Pressure. ChemCatChem 2017. [DOI: 10.1002/cctc.201701388] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wojciech Chaładaj
- Institute of Organic Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Agata Kołodziejczyk
- Institute of Organic Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Sylwester Domański
- Institute of Organic Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
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83
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Zohreh N, Hosseini SH, Jahani M, Xaba MS, Meijboom R. Stabilization of Au NPs on symmetrical tridentate NNN-Pincer ligand grafted on magnetic support as water dispersible and recyclable catalyst for coupling reaction of terminal alkyne. J Catal 2017. [DOI: 10.1016/j.jcat.2017.10.021] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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84
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The key role of Au-substrate interactions in catalytic gold subnanoclusters. Nat Commun 2017; 8:1657. [PMID: 29162805 PMCID: PMC5698477 DOI: 10.1038/s41467-017-01675-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 10/06/2017] [Indexed: 11/08/2022] Open
Abstract
The development of gold catalysis has allowed significant levels of activity and complexity in organic synthesis. Recently, the use of very active small gold subnanoclusters (Aun, n < 10) has been reported. The stabilization of such nanocatalysts to prevent self-aggregation represents a true challenge that has been partially remediated, for instance, by their immobilization in polymer matrices. Here, we describe the transient stabilization of very small gold subnanoclusters (Aun, n < 5) by alkyl chains or aromatic groups appended to the reactive π bond of simple alkynes. The superior performance toward Brønsted acid-free hydration of medium to long aliphatic alkynes (1-hexyne and 1-docecyne) and benzylacetylene with respect to phenylacetylene is demonstrated experimentally and investigated computationally. A cooperative network of dispersive Au···C–H and/or Au···π interactions, supported by quantum mechanical calculations and time-resolved luminescence experiments, is proposed to be at the origin of this stabilization. Stabilization of gold nanoclusters in order to prevent their self-aggregation remains a great challenge. Here, the authors describe transient stabilization of very small catalytic gold subnanoclusters by alkyl chains or aromatic groups appended to the reactive π bond of simple alkynes.
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85
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Benzimidazolium functionalized polysulfone-based anion exchange membranes with improved alkaline stability. CHINESE JOURNAL OF POLYMER SCIENCE 2017. [DOI: 10.1007/s10118-018-2049-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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86
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Rocchigiani L, Fernandez‐Cestau J, Agonigi G, Chambrier I, Budzelaar PHM, Bochmann M. Gold(III) Alkyne Complexes: Bonding and Reaction Pathways. Angew Chem Int Ed Engl 2017; 56:13861-13865. [PMID: 28892244 PMCID: PMC5698712 DOI: 10.1002/anie.201708640] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Indexed: 11/26/2022]
Abstract
The synthesis and characterization of hitherto hypothetical AuIII π-alkyne complexes is reported. Bonding and stability depend strongly on the trans effect and steric factors. Bonding characteristics shed light on the reasons for the very different stabilities between the classical alkyne complexes of PtII and their drastically more reactive AuIII congeners. Lack of back-bonding facilitates alkyne slippage, which is energetically less costly for gold than for platinum and explains the propensity of gold to facilitate C-C bond formation. Cycloaddition followed by aryl migration and reductive deprotonation is presented as a new reaction sequence in gold chemistry.
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Affiliation(s)
- Luca Rocchigiani
- School of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| | | | - Gabriele Agonigi
- School of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| | - Isabelle Chambrier
- School of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
| | | | - Manfred Bochmann
- School of ChemistryUniversity of East AngliaNorwich Research ParkNorwichNR4 7TJUK
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87
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You ZH, Chen YH, Wu XN, Liu YK. Lactols in Asymmetric Sequential Organo- and Gold-Catalysis: Synthesis of Densely Functionalized Epimeric Bicyclic O,O-Acetals. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701071] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Zhi-Hao You
- Key Laboratory of Marine Drugs; Chinese Ministry of Education; School of Medicine and Pharmacy; Ocean University of China; Qingdao 266003 People's Republic of China
| | - Ying-Han Chen
- Key Laboratory of Marine Drugs; Chinese Ministry of Education; School of Medicine and Pharmacy; Ocean University of China; Qingdao 266003 People's Republic of China
| | - Xiao-Na Wu
- Key Laboratory of Marine Drugs; Chinese Ministry of Education; School of Medicine and Pharmacy; Ocean University of China; Qingdao 266003 People's Republic of China
| | - Yan-Kai Liu
- Key Laboratory of Marine Drugs; Chinese Ministry of Education; School of Medicine and Pharmacy; Ocean University of China; Qingdao 266003 People's Republic of China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology; Qingdao 266003 People's Republic of China
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88
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Rocchigiani L, Fernandez-Cestau J, Agonigi G, Chambrier I, Budzelaar PHM, Bochmann M. Gold(III) Alkyne Complexes: Bonding and Reaction Pathways. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708640] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Luca Rocchigiani
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Julio Fernandez-Cestau
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Gabriele Agonigi
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Isabelle Chambrier
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
| | - Peter H. M. Budzelaar
- Department of Chemistry; University of Naples Federico II; Via Cintia 80126 Naples Italy
| | - Manfred Bochmann
- School of Chemistry; University of East Anglia; Norwich Research Park Norwich NR4 7TJ UK
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89
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Motloch P, Blahut J, Císařová I, Roithová J. X-ray characterization of triphenylphosphine-gold(I) olefin π-complexes and the revision of their stability in solution. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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90
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Vayer M, Guillot R, Bour C, Gandon V. Revealing the Activity of π-Acid Catalysts using a 7-Alkynyl Cycloheptatriene. Chemistry 2017; 23:13901-13905. [PMID: 28837245 DOI: 10.1002/chem.201703817] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Indexed: 11/10/2022]
Abstract
A compound that isomerizes into distinct products depending on the particular Lewis acid or Brønsted acid catalyst used is disclosed. One product can only be obtained with the softest π-acids, such as Au, Pt, Ga, or In complexes. Another is formed only with harder π-acids incorporating Ag or Cu salts. The formation of the third category requires even harder π-acids or protons. This simple benchmark reaction allows for prediction of the category of transformations that can be catalyzed by a new complex. It also informs whether protons have been unintentionally generated in the reaction mixture.
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Affiliation(s)
- Marie Vayer
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud, Université Paris-Saclay, 91405, Orsay, France
| | - Regis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud, Université Paris-Saclay, 91405, Orsay, France
| | - Christophe Bour
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud, Université Paris-Saclay, 91405, Orsay, France
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud, Université Paris-Saclay, 91405, Orsay, France.,Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, 1, av. de la Terrasse, 91198, Gif-sur-Yvette, France
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91
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Kim K, Jung J, Heo HG, Oh CH. Structural and Mechanistic Revision for Gold-catalyzed Sequential Activation of Propargylic Carboxylates. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11179] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Kiseong Kim
- Department of Chemistry and Research Institute of Natural Science; Hanyang University; Seoul 04763 Korea
| | - Jaemun Jung
- Department of Chemistry and Research Institute of Natural Science; Hanyang University; Seoul 04763 Korea
| | - Hoon Gu Heo
- Department of Chemistry and Research Institute of Natural Science; Hanyang University; Seoul 04763 Korea
| | - Chang Ho Oh
- Department of Chemistry and Research Institute of Natural Science; Hanyang University; Seoul 04763 Korea
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92
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Holmsen MSM, Nova A, Balcells D, Langseth E, Øien-Ødegaard S, Heyn RH, Tilset M, Laurenczy G. trans-Mutation at Gold(III): A Mechanistic Study of a Catalytic Acetylene Functionalization via a Double Insertion Pathway. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01364] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Eirin Langseth
- SINTEF Materials and Chemistry, P.O. Box 124
Blindern, Oslo N-0314, Norway
| | | | - Richard H. Heyn
- SINTEF Materials and Chemistry, P.O. Box 124
Blindern, Oslo N-0314, Norway
| | | | - Gábor Laurenczy
- Institut
des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
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93
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94
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Malta G, Kondrat SA, Freakley SJ, Davies CJ, Lu L, Dawson S, Thetford A, Gibson EK, Morgan DJ, Jones W, Wells PP, Johnston P, Catlow CRA, Kiely CJ, Hutchings GJ. Identification of single-site gold catalysis in acetylene hydrochlorination. Science 2017; 355:1399-1403. [DOI: 10.1126/science.aal3439] [Citation(s) in RCA: 299] [Impact Index Per Article: 42.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 03/07/2017] [Indexed: 01/30/2023]
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95
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Yu C, Ma X, Chen B, Tang B, Paton RS, Zhang G. Dual Gold-Catalyzed Three-Component Reaction: Efficient Synthesis of Indene-Fused Esters, Acids, and Lactones through Gold Vinylidene Intermediates. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700084] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Congjun Yu
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road 200032 Shanghai P. R. China
| | - Xiaodong Ma
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road 200032 Shanghai P. R. China
| | - Bin Chen
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road 200032 Shanghai P. R. China
| | - Bencan Tang
- Department of Chemical and Environmental Engineering; Faculty of Science and Engineering; University of Nottingham Ningbo China; 315100 Ningbo China
| | - Robert S. Paton
- Chemistry Research Laboratory; University of Oxford; 12 Mansfield Road OX1 3TA Oxford UK
| | - Guozhu Zhang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road 200032 Shanghai P. R. China
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96
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Li Y, Kirillov AM, Fang R, Yang L. Effect of Substituent on the Mechanism and Chemoselectivity of the Gold(I)-Catalyzed Propargyl Ester Tandem Cyclization. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00042] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yunhe Li
- State
Key Laboratory of Applied Organic Chemistry and Key Laboratory of
Nonferrous Metals Chemistry and Resources Utilization of Gansu Province,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Alexander M. Kirillov
- Centro
de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Ran Fang
- State
Key Laboratory of Applied Organic Chemistry and Key Laboratory of
Nonferrous Metals Chemistry and Resources Utilization of Gansu Province,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Lizi Yang
- State
Key Laboratory of Applied Organic Chemistry and Key Laboratory of
Nonferrous Metals Chemistry and Resources Utilization of Gansu Province,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
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97
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Cyclometallierte AuIII
-Komplexe: Synthese, Reaktivität und physikalisch-chemische Eigenschaften. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201607225] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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98
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Kumar R, Nevado C. Cyclometalated Gold(III) Complexes: Synthesis, Reactivity, and Physicochemical Properties. Angew Chem Int Ed Engl 2017; 56:1994-2015. [DOI: 10.1002/anie.201607225] [Citation(s) in RCA: 128] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/21/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Roopender Kumar
- Department of Chemistry; University of Zürich; Winterthurerstrasse 180 CH-8057 Switzerland
| | - Cristina Nevado
- Department of Chemistry; University of Zürich; Winterthurerstrasse 180 CH-8057 Switzerland
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99
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Malta G, Freakley SJ, Kondrat SA, Hutchings GJ. Acetylene hydrochlorination using Au/carbon: a journey towards single site catalysis. Chem Commun (Camb) 2017; 53:11733-11746. [DOI: 10.1039/c7cc05986h] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The replacement of mercuric chloride in the production of vinyl chloride monomer, a precursor to PVC, would greatly reduce the environmental impact of this large scale industrial process.
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Affiliation(s)
- Grazia Malta
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Simon J. Freakley
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Simon A. Kondrat
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
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100
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Hamel JD, Hayashi T, Cloutier M, Savoie PR, Thibeault O, Beaudoin M, Paquin JF. Highly regioselective gold-catalyzed formal hydration of propargylic gem-difluorides. Org Biomol Chem 2017; 15:9830-9836. [DOI: 10.1039/c7ob02406a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly regioselective gold-catalyzed formal hydration of propargylic gem-difluorides is presented.
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Affiliation(s)
- Jean-Denys Hamel
- CCVC
- PROTEO
- Département de chimie
- 1045 avenue de la Médecine
- Université Laval
| | - Tatsuru Hayashi
- CCVC
- PROTEO
- Département de chimie
- 1045 avenue de la Médecine
- Université Laval
| | - Mélissa Cloutier
- CCVC
- PROTEO
- Département de chimie
- 1045 avenue de la Médecine
- Université Laval
| | - Paul R. Savoie
- CCVC
- PROTEO
- Département de chimie
- 1045 avenue de la Médecine
- Université Laval
| | - Olivier Thibeault
- CCVC
- PROTEO
- Département de chimie
- 1045 avenue de la Médecine
- Université Laval
| | - Meggan Beaudoin
- CCVC
- PROTEO
- Département de chimie
- 1045 avenue de la Médecine
- Université Laval
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