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Gläsel T, Baumann BN, Hapke M. Cobalt Catalysts for [2+2+2] Cycloaddition Reactions: Isolated Precatalysts and in situ Generated Catalysts. CHEM REC 2021; 21:3727-3745. [PMID: 34859570 DOI: 10.1002/tcr.202100273] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/04/2021] [Accepted: 11/04/2021] [Indexed: 11/09/2022]
Abstract
[2+2+2] Cycloaddition reactions belong to the not even large class of reactions, which can be catalyzed or mediated by a significant number of different transition metals. Cobalt complexes belong to the catalysts that paved the way for the extensive use and profound mechanistic knowledge on this particular transformation. Beside the established role, cyclopentadienyl (Cp) cobalt complexes inherit in synthetic applications of the cyclotrimerization reaction, modification of the precatalysts opened up novel reactivities and versatility for such catalytic initiators. At the same time the development of in situ generated cobalt catalysts allowed the conversion of novel substrates as well as novel reaction modes to be realized. In this personal account recent developments will be presented and the possibilities of catalysts containing cobalt atoms in different oxidation states be discussed.
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Affiliation(s)
- Tim Gläsel
- Institute for Catalysis (INCA), Johannes Kepler University Linz, Altenberger Strasse 69, 4040, Linz, Austria
| | - Benedikt N Baumann
- Institute for Catalysis (INCA), Johannes Kepler University Linz, Altenberger Strasse 69, 4040, Linz, Austria
| | - Marko Hapke
- Institute for Catalysis (INCA), Johannes Kepler University Linz, Altenberger Strasse 69, 4040, Linz, Austria.,Research Group Catalytic Cycloadditions, Leibniz Institute for Catalysis Rostock (LIKAT), Albert-Einstein-Strasse 29a, 18059, Rostock, Germany
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2
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Liang K, Lu L, Liu X, Yang D, Wang S, Gao Y, Alhumade H, Yi H, Lei A. Electrochemical Cobalt-catalyzed Cyclotrimerization of Alkynes to 1,2,4-Substituted Arenes. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04639] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kailun Liang
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Lijun Lu
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Xing Liu
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Dali Yang
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Shengchun Wang
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Yiming Gao
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Hesham Alhumade
- Department of Chemical and Materials Engineering, Center of Research Excellence in Renewable Energy and Power Ststems, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Hong Yi
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
| | - Aiwen Lei
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
- Department of Chemical and Materials Engineering, Abdulaziz University. Jeddah 21589, Saudi Arabia
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3
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Ananikov VP, Ledovskaya MS, Voronin VV, Rodygin KS. Acetylene and Ethylene: Universal C2 Molecular Units in Cycloaddition Reactions. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1654-2318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
AbstractAcetylene and ethylene are the smallest molecules that contain an unsaturated carbon–carbon bond and can be efficiently utilized in a large variety of cycloaddition reactions. In this review, we summarize the application of these C2 molecular units in cycloaddition chemistry and highlight their amazing synthetic opportunities.1 Introduction2 Fundamental Features and Differences of Cycloaddition Reactions Involving Acetylene and Ethylene3 (2+1) Cycloaddition4 [2+2] Cycloaddition5 (3+2) Cycloaddition6 [4+2] Cycloaddition7 (2+2+1) Cycloaddition8 [2+2+2] Cycloaddition9 The Use of Acetylene and Ethylene Cycloaddition for Deuterium and 13C Labeling10 Conclusions
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Affiliation(s)
- Valentine P. Ananikov
- Institute of Chemistry, Saint Petersburg State University
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences
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4
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Roglans A, Pla-Quintana A, Solà M. Mechanistic Studies of Transition-Metal-Catalyzed [2 + 2 + 2] Cycloaddition Reactions. Chem Rev 2020; 121:1894-1979. [DOI: 10.1021/acs.chemrev.0c00062] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Anna Roglans
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
| | - Anna Pla-Quintana
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
| | - Miquel Solà
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
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5
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Aida Y, Shibata Y, Tanaka K. Facile Synthesis of Dibenzotetracenedione Derivatives by Rhodium-Catalyzed [2+2+2] Cycloaddition/Spontaneous Aromatization. Chem Asian J 2019; 14:1823-1829. [PMID: 30560555 DOI: 10.1002/asia.201801670] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 12/15/2018] [Indexed: 02/02/2023]
Abstract
It has been established that a cationic rhodium(I)/SEGPHOS complex catalyzes the [2+2+2] cycloaddition of biphenyl-linked 1,7-diynes with 1,4-naphthoquinone and anthracene-1,4-dione. Conveniently, spontaneous aromatization proceeded upon removal of the rhodium complex by passing the reaction mixture through an alumina column, to give the corresponding dibenzotetracenediones and dibenzopentacenediones, respectively, in good yields. The obtained dibenzotetracenedione could be readily transformed into the corresponding dibenzotetracene in good yield. This dibenzotetracene showed blue fluorescence with a good quantum yield, which was significantly higher than those of tetracene, tetrabenzotetracene, and hexabenzotetracene.
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Affiliation(s)
- Yukimasa Aida
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Yu Shibata
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Ken Tanaka
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
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N-Heterocyclic Carbene Adducts of Alkynyl Functionalized 1,3,2-Dithioborolanes. Molecules 2019; 24:molecules24091690. [PMID: 31052217 PMCID: PMC6539715 DOI: 10.3390/molecules24091690] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 04/25/2019] [Accepted: 04/29/2019] [Indexed: 12/02/2022] Open
Abstract
Alkynyl functionalized boron compounds are versatile intermediates in the areas of medicinal chemistry, materials science, and optical materials. In particular, alkynyl boronate esters [R1−C≡C−B(OR2)2] are of interest since they provide reactivity at both the alkyne entity, with retention of the B−C bond or alkyne transfer to electrophilic substrates with scission of the latter. The boron atom is commonly well stabilized due to (i) the extraordinary strength of two B−O bonds, and (ii) the chelate effect exerted by a bifunctional alcohol. We reasoned that the replacement of a B−O for a B−S bond would lead to higher reactivity and post-functionalization in the resulting alkynyl boronate thioesters [R1−C≡C−B(S2X)]. Access to this poorly investigated class of compounds starts form chloro dithioborolane cyclo-Cl−B(S2C2H4) as a representative example. Whereas syntheses of three coordinate alkynyl boronate thioesters [R1−C≡C−B(S2X)] proved to be ineffective, the reactions of NHC-adducts (NHC = N-heterocyclic carbene) of cyclo-Cl-B(S2C2H4) afforded the alkyne substituted thioboronate esters in good yield. The products NHC−B(S2C2H4)(C≡C-R1) are remarkably stable towards water and air, which suggests their use as boron-based building blocks for applications akin to oxygen-based boronate esters.
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León T, Fernández E. The Pauson-Khand reaction using alkynylboronic esters: solving a long-standing regioselectivity issue. Chem Commun (Camb) 2018; 52:9363-6. [PMID: 27374166 DOI: 10.1039/c6cc04717c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first intermolecular Pauson-Khand reaction, conducted using internal alkynylboronic esters, allows the installation of the boronic ester moiety at the β-position of the cyclopentenone with total regio- and stereoselectivity.
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Affiliation(s)
- Thierry León
- Center for Chemical Technology of Catalonia (CTQC), Marcel·lí Domingo, s/n, Edifici N5, 43007 Tarragona, Spain.
| | - Elena Fernández
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo, s/n, Edifici N4, 43007 Tarragona, Spain.
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8
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Zhang Y, Tong X. Construction of Complex 1,3-Cyclohexadienes via Phosphine-Catalyzed (4 + 2) Annulations of δ-Acetoxy Allenoates and Ketones. Org Lett 2017; 19:5462-5465. [DOI: 10.1021/acs.orglett.7b02787] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuwen Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, 213164, China
| | - Xiaofeng Tong
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, 213164, China
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9
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Brosmer JL, Huang W, Diaconescu PL. Reduction of Diphenylacetylene Mediated by Rare-Earth Ferrocene Diamide Complexes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00541] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Jonathan L. Brosmer
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Wenliang Huang
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Paula L. Diaconescu
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
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10
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Yang T, Ehara M. Computational Studies on Reaction Mechanism and Origins of Selectivities in Nickel-Catalyzed (2 + 2 + 2) Cycloadditions and Alkenylative Cyclizations of 1,6-Ene-Allenes and Alkenes. J Org Chem 2017; 82:2150-2159. [PMID: 28094968 DOI: 10.1021/acs.joc.6b02957] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction mechanism and origins of ligand-controlled selectivity, regioselectivity, and stereoselectivity of Ni-catalyzed (2 + 2 + 2) cycloadditions and alkenylative cyclizations of 1,6-ene-allenes and alkenes were studied by using density functional theory. The catalytic cycle involves intermolecular oxidative coupling and an intramolecular concerted 1,4-addition step to afford a stable metallacycloheptane intermediate; these steps determine both the regioselectivity and stereoselectivity. Subsequent C-C reductive elimination leads to the cyclohexane product, whereas the β-hydride elimination leads to the trans-diene product. The selectivity between (2 + 2 + 2) cycloadditions and alkenylative cyclizations is controlled by the ligand. Irrespective of the nature of the terminal substituents on the ene-allene and alkene, the P(o-tol)3 ligand always favors the C-C reductive elimination, resulting in the cyclohexane product. On the other hand, the flexibility of the PBu3 ligand means that electronic and steric factors play important roles. Electron-withdrawing groups such as CO2Me in the ene-allene terminal substituent induce obvious substrate-ligand repulsion and destabilize the C-C reductive elimination, giving rise to the trans-diene product.
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Affiliation(s)
- Tao Yang
- Institute for Molecular Science and Research Center for Computational Science, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan.,Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University , Kyoto 615-8520, Japan
| | - Masahiro Ehara
- Institute for Molecular Science and Research Center for Computational Science, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan.,Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University , Kyoto 615-8520, Japan
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11
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Yamamoto T, Ishibashi A, Suginome M. Regioselective Synthesis of o-Benzenediboronic Acids via Ir-Catalyzed o-C–H Borylation Directed by a Pyrazolylaniline-Modified Boronyl Group. Org Lett 2017; 19:886-889. [DOI: 10.1021/acs.orglett.7b00041] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takeshi Yamamoto
- Department of Synthetic Chemistry
and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Aoi Ishibashi
- Department of Synthetic Chemistry
and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry
and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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12
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Zhao F, Jia X, Li P, Zhao J, Zhou Y, Wang J, Liu H. Catalytic and catalyst-free diboration of alkynes. Org Chem Front 2017. [DOI: 10.1039/c7qo00614d] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The present review provides a comprehensive summary of the catalytic and catalyst-free diboration of alkynes.
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Affiliation(s)
- Fei Zhao
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province
- Sichuan Industrial Institute of Antibiotics
- Chengdu University
- Chengdu 610052
- P. R. China
| | - Xiuwen Jia
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province
- Sichuan Industrial Institute of Antibiotics
- Chengdu University
- Chengdu 610052
- P. R. China
| | - Pinyi Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province
- Sichuan Industrial Institute of Antibiotics
- Chengdu University
- Chengdu 610052
- P. R. China
| | - Jingwei Zhao
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province
- Sichuan Industrial Institute of Antibiotics
- Chengdu University
- Chengdu 610052
- P. R. China
| | - Yu Zhou
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P. R. China
| | - Jiang Wang
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P. R. China
| | - Hong Liu
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P. R. China
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Pyziak J, Walkowiak J, Marciniec B. Recent Advances in Boron-Substituted 1,3-Dienes Chemistry: Synthesis and Application. Chemistry 2016; 23:3502-3541. [DOI: 10.1002/chem.201602124] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Jadwiga Pyziak
- Centre for Advanced Technologies; Adam Mickiewicz University in Poznań; Umultowska 89c 61-614 Poznań Poland
| | - Jędrzej Walkowiak
- Centre for Advanced Technologies; Adam Mickiewicz University in Poznań; Umultowska 89c 61-614 Poznań Poland
| | - Bogdan Marciniec
- Centre for Advanced Technologies; Adam Mickiewicz University in Poznań; Umultowska 89c 61-614 Poznań Poland
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Umultowska 89c 61-614 Poznań Poland
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14
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Aida Y, Sugiyama H, Uekusa H, Shibata Y, Tanaka K. Rhodium-Catalyzed Asymmetric [2 + 2 + 2] Cycloaddition of α,ω-Diynes with Unsymmetrical 1,2-Disubstituted Alkenes. Org Lett 2016; 18:2672-5. [PMID: 27213217 DOI: 10.1021/acs.orglett.6b01116] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
It has been established that a cationic rhodium(I)/axially chiral biaryl bisphosphine complex catalyzes the asymmetric [2 + 2 + 2] cycloaddition of α,ω-diynes with electron-rich and unstrained unsymmetrical 1,2-disubstituted alkenes to give chiral multicyclic compounds with good yields and ee values. Interestingly, enantioselectivity highly depends on the structures of α,ω-diynes used presumably due to the presence of two distinct reaction pathways.
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Affiliation(s)
- Yukimasa Aida
- Department of Chemical Science and Engineering and ‡Department of Chemistry, Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Haruki Sugiyama
- Department of Chemical Science and Engineering and ‡Department of Chemistry, Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Hidehiro Uekusa
- Department of Chemical Science and Engineering and ‡Department of Chemistry, Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Yu Shibata
- Department of Chemical Science and Engineering and ‡Department of Chemistry, Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Ken Tanaka
- Department of Chemical Science and Engineering and ‡Department of Chemistry, Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo 152-8550, Japan
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15
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Wang N, Zheng SC, Zhang LL, Guo Z, Liu XY. Nickel(0)-Catalyzed Denitrogenative Transannulation of Benzotriazinones with Alkynes: Mechanistic Insights of Chemical Reactivity and Regio- and Enantioselectivity from Density Functional Theory and Experiment. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00572] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Na Wang
- College of Material Science & Engineering, Taiyuan University of Technology, Shanxi 030024, People’s Republic of China
| | - Sheng-Cai Zheng
- Department
of Chemistry, South University of Science and Technology, Shenzhen 518055, People’s Republic of China
| | - Lin-Lin Zhang
- College of Material Science & Engineering, Taiyuan University of Technology, Shanxi 030024, People’s Republic of China
| | - Zhen Guo
- College of Material Science & Engineering, Taiyuan University of Technology, Shanxi 030024, People’s Republic of China
| | - Xin-Yuan Liu
- Department
of Chemistry, South University of Science and Technology, Shenzhen 518055, People’s Republic of China
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16
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Domínguez G, Pérez-Castells J. Alkenes in [2+2+2] Cycloadditions. Chemistry 2016; 22:6720-39. [DOI: 10.1002/chem.201504987] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Indexed: 12/21/2022]
Affiliation(s)
- Gema Domínguez
- Chemistry and Biochemistry department; Universidad San Pablo CEU; Urb. Montepríncipe. Boadilla del Monte. E28668 Madrid Spain
| | - Javier Pérez-Castells
- Chemistry and Biochemistry department; Universidad San Pablo CEU; Urb. Montepríncipe. Boadilla del Monte. E28668 Madrid Spain
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17
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Yemam HA, Mahl A, Koldemir U, Remedes T, Parkin S, Greife U, Sellinger A. Boron-rich benzene and pyrene derivatives for the detection of thermal neutrons. Sci Rep 2015; 5:13401. [PMID: 26334111 PMCID: PMC4558605 DOI: 10.1038/srep13401] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 07/23/2015] [Indexed: 11/23/2022] Open
Abstract
A synthetic methodology is developed to generate boron rich aromatic small molecules based on benzene and pyrene moieties for the detection of thermal neutrons. The prepared aromatic compounds have a relatively high boron content up to 7.4 wt%, which is important for application in neutron detection as 10B (20% of natural abundance boron) has a large neutron induced reaction cross-section. This is demonstrated by preparing blends of the synthesized molecules with fluorescent dopants in poly(vinyltoluene) matrices resulting in comparable scintillation light output and neutron capture as state-of-the art commercial scintillators, but with the advantage of much lower cost. The boron-rich benzene and pyrene derivatives are prepared by Suzuki conditions using both microwave and traditional heating, affording yields of 40–93%. This new procedure is simple and straightforward, and has the potential to be scaled up.
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Affiliation(s)
- Henok A Yemam
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, CO 80401, USA
| | - Adam Mahl
- Department of Physics, Colorado School of Mines, Golden, CO 80401, USA
| | - Unsal Koldemir
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, CO 80401, USA
| | - Tyler Remedes
- Department of Physics, Colorado School of Mines, Golden, CO 80401, USA
| | - Sean Parkin
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Uwe Greife
- Department of Physics, Colorado School of Mines, Golden, CO 80401, USA
| | - Alan Sellinger
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, CO 80401, USA
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19
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Han F, Wang T, Li J, Zhang H, Zhang L, He X, Xia H. Synthesis, Structure, and Reactivity of an Osmacyclopentene Complex. Organometallics 2014. [DOI: 10.1021/om500616s] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Feifei Han
- State Key Laboratory for Physical Chemistry of Solid Surfaces and
Collaborative Innovation Center of Chemistry for Energy Materials
(iChEM), and Department of Chemistry, College of Chemistry and Chemical
Engineering, Xiamen University, Xiamen, 361005, People’s Republic of China
| | - Tongdao Wang
- State Key Laboratory for Physical Chemistry of Solid Surfaces and
Collaborative Innovation Center of Chemistry for Energy Materials
(iChEM), and Department of Chemistry, College of Chemistry and Chemical
Engineering, Xiamen University, Xiamen, 361005, People’s Republic of China
| | - Jinhua Li
- State Key Laboratory for Physical Chemistry of Solid Surfaces and
Collaborative Innovation Center of Chemistry for Energy Materials
(iChEM), and Department of Chemistry, College of Chemistry and Chemical
Engineering, Xiamen University, Xiamen, 361005, People’s Republic of China
| | - Hong Zhang
- State Key Laboratory for Physical Chemistry of Solid Surfaces and
Collaborative Innovation Center of Chemistry for Energy Materials
(iChEM), and Department of Chemistry, College of Chemistry and Chemical
Engineering, Xiamen University, Xiamen, 361005, People’s Republic of China
| | - Laiying Zhang
- State Key Laboratory for Physical Chemistry of Solid Surfaces and
Collaborative Innovation Center of Chemistry for Energy Materials
(iChEM), and Department of Chemistry, College of Chemistry and Chemical
Engineering, Xiamen University, Xiamen, 361005, People’s Republic of China
| | - Xumin He
- State Key Laboratory for Physical Chemistry of Solid Surfaces and
Collaborative Innovation Center of Chemistry for Energy Materials
(iChEM), and Department of Chemistry, College of Chemistry and Chemical
Engineering, Xiamen University, Xiamen, 361005, People’s Republic of China
| | - Haiping Xia
- State Key Laboratory for Physical Chemistry of Solid Surfaces and
Collaborative Innovation Center of Chemistry for Energy Materials
(iChEM), and Department of Chemistry, College of Chemistry and Chemical
Engineering, Xiamen University, Xiamen, 361005, People’s Republic of China
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20
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Song JH, Choi P, Lee SE, Jeong KH, Kim T, Kang KS, Choi YS, Ham J. Efficient and Rapid Regioselective One-Pot Synthesis of 1,4-Disubstituted 1,2,3-Triazoles from In Situ Generated Potassium Arylethynyltrifluoroborates through Sonogashira Reaction. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Kinoshita H, Takahashi H, Miura K. Regioselective Synthesis of Multisubstituted Benzenes by Palladium-Catalyzed Intermolecular Reaction of β-Iodo-β-silylstyrenes with Alkynes. Org Lett 2013; 15:2962-5. [DOI: 10.1021/ol4010883] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hidenori Kinoshita
- Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura-ku, Saitama 338-8570, Japan
| | - Hirotoshi Takahashi
- Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura-ku, Saitama 338-8570, Japan
| | - Katsukiyo Miura
- Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Sakura-ku, Saitama 338-8570, Japan
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22
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Presset M, Oehlrich D, Rombouts F, Molander GA. Complementary regioselectivity in Rh(III)-catalyzed insertions of potassium vinyltrifluoroborate via C-H activation: preparation and use of 4-trifluoroboratotetrahydroisoquinolones. Org Lett 2013; 15:1528-31. [PMID: 23496033 PMCID: PMC3663910 DOI: 10.1021/ol400307d] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Potassium vinyltrifluoroborate was found to be an efficient partner with benzamide derivatives for Rh(III)-catalyzed annulations. 4-Trifluoroboratotetrahydroisoquinolones were generated under mild conditions, affording a regioisomerically complementary substitution pattern to other alkenes in related reactions. These new boron-containing building blocks were derivatized by N-arylations, retaining the boron substituent for further elaboration.
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Affiliation(s)
- Marc Presset
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
- Neuroscience Medicinal Chemistry, Research & Development, Janssen Pharmaceutical Companies, Turnhoutseweg 30, 2340 Beerse, Belgium
| | - Daniel Oehlrich
- Neuroscience Medicinal Chemistry, Research & Development, Janssen Pharmaceutical Companies, Turnhoutseweg 30, 2340 Beerse, Belgium
| | - Frederik Rombouts
- Neuroscience Medicinal Chemistry, Research & Development, Janssen Pharmaceutical Companies, Turnhoutseweg 30, 2340 Beerse, Belgium
| | - Gary A. Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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23
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Durka K, Luliński S, Smętek J, Dąbrowski M, Serwatowski J, Woźniak K. The Influence of Boronate Groups on the Selectivity of the Br-Li Exchange in Model Dibromoaryl Boronates. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300145] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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24
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Ventre S, Simon C, Rekhroukh F, Malacria M, Amatore M, Aubert C, Petit M. Catalytic Version of Enediyne Cobalt-Mediated Cycloaddition and Selective Access to Unusual Bicyclic Trienes. Chemistry 2013; 19:5830-5. [DOI: 10.1002/chem.201300134] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Indexed: 11/11/2022]
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25
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26
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Wang L, Welker ME. Preparation and Diels–Alder/Cross Coupling Reactions of New 2-Boron-Substituted 1,3-Dienes. J Org Chem 2012; 77:8280-6. [DOI: 10.1021/jo3016727] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liqiong Wang
- Department of Chemistry, Wake Forest University, P.O. Box 7486, Winston-Salem, North Carolina 27109, United States
| | - Mark E. Welker
- Department of Chemistry, Wake Forest University, P.O. Box 7486, Winston-Salem, North Carolina 27109, United States
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27
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Seven Ö, Qu ZW, Zhu H, Bolte M, Lerner HW, Holthausen MC, Wagner M. Synthesis, Coupling, and Condensation Reactions of 1,2-Diborylated Benzenes: An Experimental and Quantum-Chemical Study. Chemistry 2012; 18:11284-95. [DOI: 10.1002/chem.201201547] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Indexed: 11/06/2022]
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28
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Bertrand G, Tortech L, Fichou D, Malacria M, Aubert C, Gandon V. An Improved Protocol for the Synthesis of [(η4-C4R4)Co(η5-C5H5)] Complexes. Organometallics 2011. [DOI: 10.1021/om200662g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guillaume Bertrand
- UPMC, IPCM, UMR CNRS 7201, 4 place Jussieu, 75005 Paris, France
- CEA-Saclay, Organic Nanostructures and Semiconductors Group, SPCSI/IRAMIS, F-91191 Gif-sur-Yvette, France
| | - Ludovic Tortech
- UPMC, IPCM, UMR CNRS 7201, 4 place Jussieu, 75005 Paris, France
- CEA-Saclay, Organic Nanostructures and Semiconductors Group, SPCSI/IRAMIS, F-91191 Gif-sur-Yvette, France
| | - Denis Fichou
- UPMC, IPCM, UMR CNRS 7201, 4 place Jussieu, 75005 Paris, France
- CEA-Saclay, Organic Nanostructures and Semiconductors Group, SPCSI/IRAMIS, F-91191 Gif-sur-Yvette, France
| | - Max Malacria
- UPMC, IPCM, UMR CNRS 7201, 4 place Jussieu, 75005 Paris, France
| | - Corinne Aubert
- UPMC, IPCM, UMR CNRS 7201, 4 place Jussieu, 75005 Paris, France
| | - Vincent Gandon
- Université Paris-Sud 11, ICMMO, UMR CNRS 8182, F-91405 Orsay, France
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29
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Erver F, Hilt G. Multi-component regio- and diastereoselective cobalt-catalyzed hydrovinylation/allylboration reaction sequence. Org Lett 2011; 13:5700-3. [PMID: 21954907 DOI: 10.1021/ol202481j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The combination of a regioselective cobalt-catalyzed 1,4-hydrovinylation and the diastereoselective allylboronation reaction leads to a wide scope of functionalized hydroxydienyl esters in a one-pot reaction in excellent yields. With catalytic amounts of base, these products are easily converted either into α,β,γ,δ-unsaturated hydroxyl esters or complex tetrasubstituted tetrahydropyrans in chemo- and diastereoselective fashions. In addition, a high-yielding four-component one-pot reaction involving an acrylate, two different and unsymmetrical 1,3-dienes, and an unsaturated aldehyde is presented.
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Affiliation(s)
- Florian Erver
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
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30
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Iannazzo L, Vollhardt KPC, Malacria M, Aubert C, Gandon V. Alkynylboronates and -boramides in CoI- and RhI-Catalyzed [2+2+2] Cycloadditions: Construction of Oligoaryls through Selective Suzuki Couplings. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100371] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Satoh Y, Obora Y. NbCl3-catalyzed three-component [2 + 2 + 2] cycloaddition reaction of terminal alkynes, internal alkynes, and alkenes to 1,3,4,5-tetrasubstituted 1,3-cyclohexadienes. Org Lett 2011; 13:2568-71. [PMID: 21491900 DOI: 10.1021/ol200662e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three-component [2 + 2 + 2] cycloaddition of terminal alkynes, internal alkynes, and terminal alkenes is achieved using an NbCl(3)(DME) catalyst, leading to 1,3,4,5-substituted 1,3-cyclohexadienes in excellent yields with high chemo- and regioselectivity.
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Affiliation(s)
- Yasushi Satoh
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Suita, Osaka, Japan
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32
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Hilt G, Erver F, Harms K. Regioselective Cobalt-Catalyzed Alder-ene Reaction toward Silicon- and Boron-Functionalized Building Blocks. Org Lett 2010; 13:304-7. [DOI: 10.1021/ol102764w] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gerhard Hilt
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str., 35043 Marburg, Germany
| | - Florian Erver
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str., 35043 Marburg, Germany
| | - Klaus Harms
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str., 35043 Marburg, Germany
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33
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Lebœuf D, Iannazzo L, Geny A, Malacria M, Vollhardt K, Aubert C, Gandon V. Cobalt-Mediated Linear 2:1 Co-oligomerization of Alkynes with Enol Ethers to Give 1-Alkoxy-1,3,5-Trienes: A Missing Mode of Reactivity. Chemistry 2010; 16:8904-13. [DOI: 10.1002/chem.201000486] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Struble JR, Lee SJ, Burke MD. Ethynyl MIDA boronate: a readily accessible and highly versatile building block for small molecule synthesis. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.04.020] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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35
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Zhou Y, Lecourt T, Micouin L. Direct Synthesis of 1,4-Disubstituted-5-alumino-1,2,3-triazoles: Copper-Catalyzed Cycloaddition of Organic Azides and Mixed Aluminum Acetylides. Angew Chem Int Ed Engl 2010; 49:2607-10. [PMID: 20198674 DOI: 10.1002/anie.200907016] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yuhan Zhou
- UMR 8638, Université Paris Descartes, CNRS, Faculté de Pharmacie, 4 avenue de l'Observatoire, 75006 Paris, France
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36
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Zhou Y, Lecourt T, Micouin L. Direct Synthesis of 1,4-Disubstituted-5-alumino-1,2,3-triazoles: Copper-Catalyzed Cycloaddition of Organic Azides and Mixed Aluminum Acetylides. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200907016] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Kirkham JD, Delaney PM, Ellames GJ, Row EC, Harrity JPA. An alkynylboronate cycloaddition strategy to functionalised benzyne derivatives. Chem Commun (Camb) 2010; 46:5154-6. [DOI: 10.1039/c0cc01345e] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Discovery of isoxazole voltage gated sodium channel blockers for treatment of chronic pain. Bioorg Med Chem Lett 2009; 19:5334-8. [DOI: 10.1016/j.bmcl.2009.07.135] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2009] [Revised: 07/27/2009] [Accepted: 07/29/2009] [Indexed: 11/21/2022]
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39
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Geny A, Agenet N, Iannazzo L, Malacria M, Aubert C, Gandon V. Air-Stable {(C5H5)Co} Catalysts for [2+2+2] Cycloadditions. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200806001] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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40
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41
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Hara H, Hirano M, Tanaka K. A New Route to Substituted Phenols by Cationic Rhodium(I)/BINAP Complex-Catalyzed Decarboxylative [2 + 2 + 2] Cycloaddition. Org Lett 2009; 11:1337-40. [DOI: 10.1021/ol900123d] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiromi Hara
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Masao Hirano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Ken Tanaka
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
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42
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CpRuCl- and CpCo-catalyzed or mediated cyclotrimerizations of alkynes and [2+2+2] cycloadditions of alkynes to alkenes: A comparative DFT study. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2008.10.032] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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43
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Huang J, Macdonald SJF, Harrity JPA. A cycloaddition route to novel triazole boronic esters. Chem Commun (Camb) 2009:436-8. [DOI: 10.1039/b817052e] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Geny A, Gaudrel S, Slowinski F, Amatore M, Chouraqui G, Malacria M, Aubert C, Gandon V. A Straightforward Procedure for the [2+2+2] Cycloaddition of Enediynes. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800646] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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45
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Welker ME. Recent advances in syntheses and reaction chemistry of boron and silicon substituted 1,3-dienes. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.09.040] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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46
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Miura T, Yamauchi M, Murakami M. Synthesis of 1(2H)-Isoquinolones by the Nickel-Catalyzed Denitrogenative Alkyne Insertion of 1,2,3-Benzotriazin-4(3H)-ones. Org Lett 2008; 10:3085-8. [DOI: 10.1021/ol8010826] [Citation(s) in RCA: 130] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomoya Miura
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Motoshi Yamauchi
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
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47
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Delaney PM, Huang J, Macdonald SJF, Harrity JPA. A [4 + 2] Cycloaddition Strategy to Pyridine Boronic Ester Derivatives. Org Lett 2008; 10:781-3. [DOI: 10.1021/ol7029189] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Patrick M. Delaney
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, United Kingdom, and GlaxoSmithKline Research and Development, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, United Kingdom
| | - Jianhui Huang
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, United Kingdom, and GlaxoSmithKline Research and Development, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, United Kingdom
| | - Simon J. F. Macdonald
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, United Kingdom, and GlaxoSmithKline Research and Development, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, United Kingdom
| | - Joseph P. A. Harrity
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, United Kingdom, and GlaxoSmithKline Research and Development, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, United Kingdom
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48
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Gandon V, Aubert C, Malacria M, Vollhardt KPC. Cobalt-mediated regio- and stereoselective assembly of dienamides by hydroaminative alkyne coupling of α,ω-diynes. Chem Commun (Camb) 2008:1599-601. [DOI: 10.1039/b716841a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Delaney PM, Browne DL, Adams H, Plant A, Harrity JP. A 2-pyrone cycloaddition route to functionalised aromatic boronic esters. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.08.118] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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