1
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Fan Y, Yu L, Gardiner MG, Coote ML, Sherburn MS. Enantioselective oxa-Diels-Alder Sequences of Dendralenes. Angew Chem Int Ed Engl 2022; 61:e202204872. [PMID: 35900232 PMCID: PMC9804868 DOI: 10.1002/anie.202204872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Indexed: 01/09/2023]
Abstract
Diene-transmissive hetero-Diels-Alder sequences involving carbonyl dienophiles are reported for the first time. High enantioselectivities are achieved in the reaction of phenylglyoxal with a broad range of dendralene structures, through the optimization of a Pd2+ catalyst system. The initial catalyst-controlled enantioselective oxa-Diels-Alder (ODA) cycloaddition to a [3]dendralene generates a dihydropyran carrying a semicyclic diene. This participates in a subsequent catalyst or substrate-controlled Diels-Alder reaction to generate sp3 -rich fused polycyclic systems containing both heterocycles and carbocycles. Computational investigations reveal a concerted asynchronous mechanism. π-Complexation of a diene C=C bond to Pd2+ occurs in both the pre-transition state (TS) complex and in cycloaddition TSs, controlling stereoselectivity. A formal enantioselective [4+2]cycloaddition of a CO2 dienophile is demonstrated.
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Affiliation(s)
- Yi‐Min Fan
- Research School of ChemistryAustralian National UniversityCanberraACT 2601Australia
| | - Li‐Juan Yu
- Research School of ChemistryAustralian National UniversityCanberraACT 2601Australia
| | - Michael G. Gardiner
- Research School of ChemistryAustralian National UniversityCanberraACT 2601Australia
| | - Michelle L. Coote
- Institute for Nanoscale Science & TechnologyFlinders UniversitySturt Road, Bedford ParkSouth Australia5042Australia
| | - Michael S. Sherburn
- Research School of ChemistryAustralian National UniversityCanberraACT 2601Australia
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2
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Fan YM, Yu LJ, Gardiner MG, Coote ML, Sherburn M. Enantioselective oxa‐Diels‐Alder Sequences of Dendralenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202204872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yi-Min Fan
- Australian National University College of Science: Australian National University Research School of Chemistry AUSTRALIA
| | - Li-Juan Yu
- Australian National University College of Science: Australian National University Research School of Chemistry AUSTRALIA
| | - Michael G. Gardiner
- Australian National University College of Science: Australian National University Research School of Chemistry AUSTRALIA
| | - Michelle L. Coote
- Flinders University of South Australia: Flinders University Chemistry AUSTRALIA
| | - Michael Sherburn
- Australian National University Research School of Chemistry Building 137, Sullivan's Creek Road 0200 Canberra AUSTRALIA
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3
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Xu GL, Wang ZX. Palladium‐Catalyzed Reaction of 2,3‐Allenols with Amines: Synthesis of [3]Dendralenes and 1,3‐Dienes Containing Allylic Amino and Hydroxy Groups. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200516] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Guang-Li Xu
- University of Science and Technology of China CHINA
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4
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Tan X, Gu Q, Yang X, Yang Y, Hu B, Mao S, Lin J, Jin Y. Palladium-Catalyzed [2+3] Cycloaddition/Cross-Coupling Reaction: Z/E and Diastereoselective Synthesis of Dendralene-Functionalized Dihydrofurans. Org Lett 2022; 24:4383-4388. [PMID: 35696655 DOI: 10.1021/acs.orglett.2c01605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we describe a Pd-catalyzed [2+3] cycloaddition/cross-coupling reaction of allenyl acetates for the Z/E selective and diastereoselective synthesis of dendralene-functionalized dihydrofurans. Remarkably, mechanistic studies show the formation of an epoxide from a carbonyl bond via cycloaddition, which is practically and mechanistically significant for the construction of other bioactive heterocyclic epoxides. This research also revealed the utility and potential of allenic esters as C2 synthons and 1,2-biselectrophiles in cycloaddition reactions.
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Affiliation(s)
- Xiangyu Tan
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, and School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Qianqian Gu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, and School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Xingjiang Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, and School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Yingying Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, and School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Bingwei Hu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, and School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Shuai Mao
- Department of Medicinal Chemistry, School of Pharmacy, Xi'an Jiaotong University, Xi'an 710061, China
| | - Jun Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, and School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
| | - Yi Jin
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, and School of Chemical Science and Technology, Yunnan University, Kunming 650091, P. R. China
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5
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Shukla RK, Nair AM, Khan S, Volla CMR. Cobalt-Catalyzed C8-Dienylation of Quinoline-N-Oxides. Angew Chem Int Ed Engl 2020; 59:17042-17048. [PMID: 32558084 DOI: 10.1002/anie.202003216] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/25/2020] [Indexed: 12/19/2022]
Abstract
An efficient Cp*CoIII -catalyzed C8-dienylation of quinoline-N-oxides was achieved by employing allenes bearing leaving groups at the α-position as the dienylating agents. The reaction proceeds by CoIII -catalyzed C-H activation of quinoline-N-oxides and regioselective migratory insertion of the allene followed by a β-oxy elimination, leading to overall dienylation. Site-selective C-H activation was achieved with excellent selectivity under mild reaction conditions, and 30 mol % of a NaF additive was found to be crucial for the efficient dienylation. The methodology features high stereoselectivity, mild reaction conditions, and good functional-group tolerance. C8-alkenylation of quinoline-N-oxides was achieved in the case of allenes devoid of leaving groups as coupling partners. Furthermore, gram-scale preparation and preliminary mechanistic experiments were carried out to gain insights into the reaction mechanism.
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Affiliation(s)
- Rahul K Shukla
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India
| | - Akshay M Nair
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India
| | - Salman Khan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India
| | - Chandra M R Volla
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India
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6
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Shukla RK, Nair AM, Khan S, Volla CMR. Cobalt‐Catalyzed C8‐Dienylation of Quinoline‐
N
‐Oxides. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003216] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Rahul K. Shukla
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai India
| | - Akshay M. Nair
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai India
| | - Salman Khan
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai India
| | - Chandra M. R. Volla
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai India
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7
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Sowden MJ, Ward JS, Sherburn MS. Synthesis and Properties of 2,3-Diethynyl-1,3-Butadienes. Angew Chem Int Ed Engl 2020; 59:4145-4153. [PMID: 31872518 DOI: 10.1002/anie.201914807] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Indexed: 11/08/2022]
Abstract
The first general preparative access to compounds of the 2,3-diethynyl-1,3-butadiene (DEBD) class is reported. The synthesis involves a one-pot, twofold Sonogashira-type, Pd0 -catalyzed coupling of two terminal alkynes and a carbonate derivative of a 2-butyne-1,4-diol. The synthesis is broad in scope and members of this structural family are kinetically stable enough to be handled using standard laboratory techniques at ambient temperature. They decompose primarily through heat-promoted cyclodimerizations, which are impeded by alkyl substitution and accelerated by aryl or alkenyl substitution. An iterative sequence of these unprecedented Sonogashira-type couplings generates a new type of expanded dendralene. A suitably substituted DEBD carrying two terminal alkyne groups undergoes Glaser-Eglinton cyclo-oligomerization to produce a new class of expanded radialenes, which are chiral due to restricted rotation about their 1,3-butadiene units. The structural features giving rise to atropisomerism in these compounds are distinct from those reported previously.
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Affiliation(s)
- Madison J Sowden
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Jas S Ward
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Michael S Sherburn
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
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9
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Elgindy C, Ward JS, Sherburn MS. Tetravinylallene. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Cecile Elgindy
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Jas S. Ward
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Michael S. Sherburn
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
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10
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Abstract
The first chemical synthesis of tetravinylallene (3,5-divinylhepta-1,3,4,6-tetraene) is reported. The final, key step of the synthesis involves a palladium-catalyzed, Negishi-type cross-coupling involving 1,5-transposition of a penta-2-en-4-yn-1-ol methanesulfonate. The unprecedented fundamental hydrocarbon is sufficiently stable to be purified by flash chromatography. A similar synthetic pathway grants access to the first substituted tetravinylallenes, which provide insights into the influence of substitution upon stability and reactivity. Tetravinylallenes are shown to break new ground in swift structural complexity creation, with three novel sequences reported.
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Affiliation(s)
- Cecile Elgindy
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Jas S Ward
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Michael S Sherburn
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
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11
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Batsyts S, Hübner EG, Namyslo JC, Schmidt A. The Interconnection of Two Positive Charges by Conjugation and Cross‐Conjugation in Bis‐Quinolinium Ethynyls. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900816] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Sviatoslav Batsyts
- Institute of Organic Chemistry Clausthal University of Technology Leibnizstrasse 6 D‐38678 Clausthal‐Zellerfeld Germany
| | - Eike G. Hübner
- Institute of Organic Chemistry Clausthal University of Technology Leibnizstrasse 6 D‐38678 Clausthal‐Zellerfeld Germany
| | - Jan C. Namyslo
- Institute of Organic Chemistry Clausthal University of Technology Leibnizstrasse 6 D‐38678 Clausthal‐Zellerfeld Germany
| | - Andreas Schmidt
- Institute of Organic Chemistry Clausthal University of Technology Leibnizstrasse 6 D‐38678 Clausthal‐Zellerfeld Germany
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12
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Horvath KL, Newton CG, Roper KA, Ward JS, Sherburn MS. A Broad-Spectrum Synthesis of Tetravinylethylenes. Chemistry 2019; 25:4072-4076. [PMID: 30729590 DOI: 10.1002/chem.201900550] [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: 02/05/2019] [Indexed: 11/08/2022]
Abstract
The first general synthesis of compounds of the tetravinylethylene (TVE) family is reported. Ramirez-type dibromo-olefination of readily accessible penta-1,4-dien-3-ones generates 3,3-dibromo[3]dendralenes, which undergo twofold Negishi, Suzuki-Miyaura or Mizoroki-Heck reactions with a wide variety of olefinic coupling partners. This route delivers a broad range of unsymmetrically substituted tetravinylethylenes with up to three different alkenyl substituents attached to the central C=C bond. The extensive scope of the approach is demonstrated by the preparation of the first higher order oligo-alkenic through-conjugated/cross-conjugated hybrid compounds. An unsymmetrically substituted TVE is shown to undergo a domino electrocyclization-cycloaddition with high site-selectivity and diastereoselectivity, thereby demonstrating the substantial synthetic potential of substituted TVEs for controlled, rapid structural complexity generation.
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Affiliation(s)
- Kelsey L Horvath
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Christopher G Newton
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Kimberley A Roper
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Jas S Ward
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Michael S Sherburn
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
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13
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Lücht A, Jones PG, Werz DB. Reactions of 3,3′-Linked Bispyrroles with Carbon Electrophiles. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900106] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Alexander Lücht
- Institut für Organische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Peter G. Jones
- Institut für Anorganische und Analytische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Daniel B. Werz
- Institut für Organische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
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14
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Li L, Luo P, Deng Y, Shao Z. Regioselectivity Switch in Palladium‐Catalyzed Allenylic Cycloadditions of Allenic Esters: [4+1] or [4+3] Cycloaddition/Cross‐Coupling. Angew Chem Int Ed Engl 2019; 58:4710-4713. [DOI: 10.1002/anie.201901511] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Long Li
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education School of Chemical Science and Technology State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan University Kunming 650091 China
| | - Pengfei Luo
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education School of Chemical Science and Technology State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan University Kunming 650091 China
| | - Yuhua Deng
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education School of Chemical Science and Technology State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan University Kunming 650091 China
| | - Zhihui Shao
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education School of Chemical Science and Technology State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan University Kunming 650091 China
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15
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Li L, Luo P, Deng Y, Shao Z. Regioselectivity Switch in Palladium‐Catalyzed Allenylic Cycloadditions of Allenic Esters: [4+1] or [4+3] Cycloaddition/Cross‐Coupling. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901511] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Long Li
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education School of Chemical Science and Technology State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan University Kunming 650091 China
| | - Pengfei Luo
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education School of Chemical Science and Technology State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan University Kunming 650091 China
| | - Yuhua Deng
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education School of Chemical Science and Technology State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan University Kunming 650091 China
| | - Zhihui Shao
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education School of Chemical Science and Technology State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan University Kunming 650091 China
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16
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Polák P, Tobrman T. Novel Selective Approach to Terminally Substituted [n
]Dendralenes. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801522] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Peter Polák
- Department of Organic Chemistry; University of Chemistry and Technology Prague; Technická 5 16628 Prague 6 Czech Republic
| | - Tomáš Tobrman
- Department of Organic Chemistry; University of Chemistry and Technology Prague; Technická 5 16628 Prague 6 Czech Republic
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17
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Li H, Gontla R, Flegel J, Merten C, Ziegler S, Antonchick AP, Waldmann H. Enantioselective Formal C(sp3
)−H Bond Activation in the Synthesis of Bioactive Spiropyrazolone Derivatives. Angew Chem Int Ed Engl 2018; 58:307-311. [DOI: 10.1002/anie.201811041] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Houhua Li
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Rajesh Gontla
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Jana Flegel
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
- Technische Universität Dortmund; Fakultät Chemie und Chemische Biologie; Otto-Hahn-Straße 4a 44227 Dortmund Germany
| | - Christian Merten
- Ruhr-Universität Bochum; Lehrstuhl für Organische Chemie II; Universitätsstraße 150 44801 Bochum Germany
| | - Slava Ziegler
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Andrey P. Antonchick
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
- Technische Universität Dortmund; Fakultät Chemie und Chemische Biologie; Otto-Hahn-Straße 4a 44227 Dortmund Germany
| | - Herbert Waldmann
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
- Technische Universität Dortmund; Fakultät Chemie und Chemische Biologie; Otto-Hahn-Straße 4a 44227 Dortmund Germany
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18
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Li H, Gontla R, Flegel J, Merten C, Ziegler S, Antonchick AP, Waldmann H. Enantioselective Formal C(sp3
)−H Bond Activation in the Synthesis of Bioactive Spiropyrazolone Derivatives. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811041] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Houhua Li
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Rajesh Gontla
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Jana Flegel
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
- Technische Universität Dortmund; Fakultät Chemie und Chemische Biologie; Otto-Hahn-Straße 4a 44227 Dortmund Germany
| | - Christian Merten
- Ruhr-Universität Bochum; Lehrstuhl für Organische Chemie II; Universitätsstraße 150 44801 Bochum Germany
| | - Slava Ziegler
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Andrey P. Antonchick
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
- Technische Universität Dortmund; Fakultät Chemie und Chemische Biologie; Otto-Hahn-Straße 4a 44227 Dortmund Germany
| | - Herbert Waldmann
- Max-Planck-Institut für Molekulare Physiologie; Abteilung Chemische Biologie; Otto-Hahn-Straße 11 44227 Dortmund Germany
- Technische Universität Dortmund; Fakultät Chemie und Chemische Biologie; Otto-Hahn-Straße 4a 44227 Dortmund Germany
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19
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Sako K, Hasegawa T, Onda H, Shiotsuka M, Watanabe M, Shinmyozu T, Tojo S, Fujitsuka M, Majima T, Hirao Y, Kubo T, Iwanaga T, Toyota S, Takemura H. Donor-Donor'-Acceptor Triads Based on [3.3]Paracyclophane with a 1,4-Dithiafulvene Donor and a Cyanomethylene Acceptor: Synthesis, Structure, and Electrochemical and Photophysical Properties. Chemistry 2018; 24:11407-11416. [PMID: 29845675 DOI: 10.1002/chem.201801774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Indexed: 11/07/2022]
Abstract
Donor-donor'-acceptor triads (1, 2), based on [3.3]paracyclophane ([3.3]PCP) as a bridge, with electron-donating properties (D') using 1,4-dithiafulvene (DTF; TTF half unit) as a donor and dicyanomethylene (DCM; TCNE half unit) or an ethoxycarbonyl-cyanomethylene (ECM) as an acceptor were designed and synthesized. The pulse radiolysis study of 1 a in 1,2-dichloroethane allowed the clear assignment of the absorption bands of the DTF radical cation (1 a.+ ), whereas the absorption bands due to the DCM radical anion could not be observed by γ-ray radiolysis in 2-methyltetrahydrofuran rigid glass at 77 K. Electrochemical oxidation of 1 a first generates the DTF radical cation (1 a.+ ), the absorption bands of which are in agreement with those observed by a pulse radiolysis study, followed by dication (1 a2+ ). The ESR spectrum of 1 a.+ showed a symmetrical signal with fine structure and an ESR simulation predicted that the spin of 1 a.+ is delocalized over S and C atoms of the DTF moiety and the central C atom of the trimethylene bridge bearing the DTF moiety. Pulse radiolysis, ESR, and electrochemical studies indicate that the DTF radical cation of 1 a.+ is more stable than that of 6.+ , and the latter shows a strong tendency to dimerize. This result indicates that the [3.3]PCP moiety as a bridge can stabilize the DTF radical cation more than the 1,3-diphenylpropane moiety because of kinetic stability due to its rigid structure and the weak electronic interaction of DTF and DCM moieties through [3.3]PCP.
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Affiliation(s)
- Katsuya Sako
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, 466-8555, Japan
| | - Tomoya Hasegawa
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, 466-8555, Japan
| | - Hiroyuki Onda
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, 466-8555, Japan
| | - Michito Shiotsuka
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, 466-8555, Japan
| | - Motonori Watanabe
- International Institute for Carbon-Neutral Energy Research (I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Teruo Shinmyozu
- Department of Chemistry, National (Taiwan) University, No. 1, Section 4, Roosevelt Rd, Taipei, 10617, Taiwan
| | - Sachiko Tojo
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka, 567-0047, Japan
| | - Mamoru Fujitsuka
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka, 567-0047, Japan
| | - Tetsuro Majima
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka, 567-0047, Japan
| | - Yasukazu Hirao
- Department of Chemistry, Graduate School of Science, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka, 560-0043, Japan
| | - Takashi Kubo
- Department of Chemistry, Graduate School of Science, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka, 560-0043, Japan
| | - Tetsuo Iwanaga
- Department of Chemistry, Faculty of Science, Okayama University of Science, Ridaicho 1-1, Kita-ku, Okayama, 700-0005, Japan
| | - Shinji Toyota
- Department of Chemistry, School of Science, Tokyo Institute of Technology, Ookayama 2-12-1, Meguro-ku, Tokyo, 152-8550, Japan
| | - Hiroyuki Takemura
- Department of Chemical and Biological Science, Faculty of Science, Japan Women's University, Mejirodai 2-8-1, Bunkyo-ku, Tokyo, 112-8681, Japan
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20
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Rivera-Chao E, Fañanás-Mastral M. Synthesis of Stereodefined Borylated Dendralenes through Copper-Catalyzed Allylboration of Alkynes. Angew Chem Int Ed Engl 2018; 57:9945-9949. [DOI: 10.1002/anie.201806334] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Eva Rivera-Chao
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Martín Fañanás-Mastral
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
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21
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Rivera-Chao E, Fañanás-Mastral M. Synthesis of Stereodefined Borylated Dendralenes through Copper-Catalyzed Allylboration of Alkynes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806334] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Eva Rivera-Chao
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Martín Fañanás-Mastral
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
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22
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Santhoshkumar R, Cheng CH. Fickle Reactivity of Allenes in Transition-Metal-Catalyzed C−H Functionalizations. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800133] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
| | - Chien-Hong Cheng
- Department of Chemistry; National Tsing Hua University; Hsinchu 30013 Taiwan
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23
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Qiu Y, Posevins D, Bäckvall JE. Selective Palladium-Catalyzed Allenic C-H Bond Oxidation for the Synthesis of [3]Dendralenes. Angew Chem Int Ed Engl 2017; 56:13112-13116. [PMID: 28799682 DOI: 10.1002/anie.201706211] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Indexed: 12/13/2022]
Abstract
A highly selective palladium-catalyzed allenic C-H bond oxidation was developed, and it provides a novel and straightforward synthesis of [3]dendralene derivatives. A variety of [3]dendralenes with diverse substitution patterns are accessible with good efficiency and high stereoselectivity. The reaction tolerates a broad substrate scope containing various functional groups on the allene moiety, including ketone, aldehyde, ester, and phenyl groups. Also, a wide range of olefins with both electron-donating and electron-withdrawing aryls, acrylate, sulfone, and phosphonate groups are tolerated.
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Affiliation(s)
- Youai Qiu
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Daniels Posevins
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Jan-E Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
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24
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Qiu Y, Posevins D, Bäckvall JE. Selective Palladium-Catalyzed Allenic C−H Bond Oxidation for the Synthesis of [3]Dendralenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706211] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Youai Qiu
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; 10691 Stockholm Sweden
| | - Daniels Posevins
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; 10691 Stockholm Sweden
| | - Jan-E. Bäckvall
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; 10691 Stockholm Sweden
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25
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Zhang C, Tian J, Ren J, Wang Z. Intramolecular Parallel [4+3] Cycloadditions of Cyclopropane 1,1-Diesters with [3]Dendralenes: Efficient Construction of [5.3.0]Decane and Corresponding Polycyclic Skeletons. Chemistry 2016; 23:1231-1236. [DOI: 10.1002/chem.201605190] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Chi Zhang
- State Key Laboratory of Elemento-Organic Chemistry; Institute of Elemento-Organic Chemistry; College of Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Nankai University; 94 Weijin Road Tianjin 300071 P. R. China
| | - Jun Tian
- State Key Laboratory of Elemento-Organic Chemistry; Institute of Elemento-Organic Chemistry; College of Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Nankai University; 94 Weijin Road Tianjin 300071 P. R. China
| | - Jun Ren
- State Key Laboratory of Elemento-Organic Chemistry; Institute of Elemento-Organic Chemistry; College of Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Nankai University; 94 Weijin Road Tianjin 300071 P. R. China
| | - Zhongwen Wang
- State Key Laboratory of Elemento-Organic Chemistry; Institute of Elemento-Organic Chemistry; College of Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Nankai University; 94 Weijin Road Tianjin 300071 P. R. China
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26
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Lippincott DJ, Linstadt RTH, Maser MR, Lipshutz BH. Synthesis of Functionalized [3], [4], [5] and [6]Dendralenes through Palladium‐Catalyzed Cross‐Couplings of Substituted Allenoates. Angew Chem Int Ed Engl 2016; 56:847-850. [DOI: 10.1002/anie.201609636] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 10/22/2016] [Indexed: 01/07/2023]
Affiliation(s)
- Daniel J. Lippincott
- Department of Chemistry & Biochemistry University of California Santa Barbara CA 93106 USA
| | - Roscoe T. H. Linstadt
- Department of Chemistry & Biochemistry University of California Santa Barbara CA 93106 USA
| | - Michael R. Maser
- Department of Chemistry & Biochemistry University of California Santa Barbara CA 93106 USA
| | - Bruce H. Lipshutz
- Department of Chemistry & Biochemistry University of California Santa Barbara CA 93106 USA
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27
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Lippincott DJ, Linstadt RTH, Maser MR, Lipshutz BH. Synthesis of Functionalized [3], [4], [5] and [6]Dendralenes through Palladium‐Catalyzed Cross‐Couplings of Substituted Allenoates. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609636] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Daniel J. Lippincott
- Department of Chemistry & Biochemistry University of California Santa Barbara CA 93106 USA
| | - Roscoe T. H. Linstadt
- Department of Chemistry & Biochemistry University of California Santa Barbara CA 93106 USA
| | - Michael R. Maser
- Department of Chemistry & Biochemistry University of California Santa Barbara CA 93106 USA
| | - Bruce H. Lipshutz
- Department of Chemistry & Biochemistry University of California Santa Barbara CA 93106 USA
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28
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Green NJ, Willis AC, Sherburn MS. Direct Cross‐Couplings of Propargylic Diols. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604527] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nicholas J. Green
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Anthony C. Willis
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Michael S. Sherburn
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
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29
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Green NJ, Willis AC, Sherburn MS. Direct Cross‐Couplings of Propargylic Diols. Angew Chem Int Ed Engl 2016; 55:9244-8. [DOI: 10.1002/anie.201604527] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Indexed: 01/23/2023]
Affiliation(s)
- Nicholas J. Green
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Anthony C. Willis
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - Michael S. Sherburn
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
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30
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Tan SM, Willis AC, Paddon‐Row MN, Sherburn MS. Multicomponent Diene‐Transmissive Diels–Alder Sequences Featuring Aminodendralenes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510925] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Siu Min Tan
- Research School of Chemistry Australian National University Canberra ACT 0200 Australia
| | - Anthony C. Willis
- Research School of Chemistry Australian National University Canberra ACT 0200 Australia
| | | | - Michael S. Sherburn
- Research School of Chemistry Australian National University Canberra ACT 0200 Australia
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31
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Tan SM, Willis AC, Paddon‐Row MN, Sherburn MS. Multicomponent Diene‐Transmissive Diels–Alder Sequences Featuring Aminodendralenes. Angew Chem Int Ed Engl 2016; 55:3081-5. [PMID: 26823233 DOI: 10.1002/anie.201510925] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Siu Min Tan
- Research School of Chemistry Australian National University Canberra ACT 0200 Australia
| | - Anthony C. Willis
- Research School of Chemistry Australian National University Canberra ACT 0200 Australia
| | | | - Michael S. Sherburn
- Research School of Chemistry Australian National University Canberra ACT 0200 Australia
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32
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Thies N, Haak E. Ruthenium-catalyzed synthesis of 2,3-cyclo[3]dendralenes and complex polycycles from propargyl alcohols. Angew Chem Int Ed Engl 2015; 54:4097-101. [PMID: 25655395 DOI: 10.1002/anie.201412207] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Indexed: 11/11/2022]
Abstract
Ruthenium-catalyzed cascade transformations for the synthesis of 2,3-cyclo[3]dendralenes and multicomponent processes based thereon to generate complex polycycles are presented. The combination of allylation-cyclization sequences with diene-transmissive Diels-Alder reactions allows the rapid and selective construction of natural-product-like motifs from easily accessible starting materials in a one-pot process and provides a new method to access potential drug candidates.
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Affiliation(s)
- Nora Thies
- Institut für Chemie, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg (Germany) http://www.ich.ovgu.de
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33
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Thies N, Haak E. Rutheniumkatalysierte Synthese von 2,3-Cyclo[3]dendralenen und komplexer Polycyclen aus Propargylalkoholen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412207] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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34
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Gong ZL, Zhong YW, Yao J. Conformation-determined through-bond versus through-space electronic communication in mixed-valence systems with a cross-conjugated urea bridge. Chemistry 2014; 21:1554-66. [PMID: 25421648 DOI: 10.1002/chem.201405332] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Indexed: 01/28/2023]
Abstract
Bis-triarylamine 2 and cyclometalated diruthenium 6(PF6)2 with a linear trans,trans-urea bridge have been prepared, together with the bis-triarylamine 3 and cyclometalated diruthenium 8(PF6)2 with a folded cis,cis-N,N-dimethylurea bridge. The linear or folded conformations of these molecules are supported by single-crystal X-ray structures of 2, 3, and other related compounds. These compounds display two consecutive anodic redox waves (N(·+/0) or Ru(III/II) processes) with a potential separation of 110-170 mV. This suggests that an efficient electronic coupling is present between two redox termini through the cross-conjugated urea bridge. The degree of electronic coupling has been investigated by using spectroelectrochemical measurements. Distinct intervalence charge-transfer (IVCT) transitions have been observed for mixed-valent (MV) compounds with a linear conformation. The IVCT transitions can also be identified for the folded MV compounds, albeit with a much weaker intensity. DFT results support that the electronic communication occurs by a through-bond and through-space pathway for the linear and folded compounds, respectively. The IVCT transitions of the MV compounds have been reproduced by TDDFT calculations. For the purpose of comparison, a bistriarylamine and a diruthenium complex with an imidazolidin-2-one bridge and a urea-containing mono-triarylamine and monoruthenium complex have been synthesized and studied.
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Affiliation(s)
- Zhong-Liang Gong
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
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35
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Lindeboom EJ, Willis AC, Paddon-Row MN, Sherburn MS. Tetravinylethylene. Angew Chem Int Ed Engl 2014; 53:5440-3. [PMID: 24756920 DOI: 10.1002/anie.201402840] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Indexed: 11/12/2022]
Abstract
The first four-fold cross coupling reaction involving alkenic partners leads to the title hydrocarbon on multi-gram scale in one step from commercially available precursors. In stark contrast to its close structural relatives, tetravinylethylene is a remarkably robust, bench-stable compound. The π-bond rich hydrocarbon is shown to undergo one-pot sequences of pericyclic reactions leading to the formation of complex systems with four new rings, seven C-C bonds and ten stereocenters with a very high level of stereoselectivity. Insights into the reactivity of this and related systems is provided using the accurate composite ab initio MO G4(MP2) method.
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Affiliation(s)
- Erik J Lindeboom
- Research School of Chemistry, Australian National University Canberra, Canberra, ACT 0200 (Australia)
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36
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Nishimura A, Tamai E, Ohashi M, Ogoshi S. Synthesis of cyclobutenes and allenes by cobalt-catalyzed cross-dimerization of simple alkenes with 1,3-enynes. Chemistry 2014; 20:6613-7. [PMID: 24782325 DOI: 10.1002/chem.201402218] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Indexed: 11/07/2022]
Abstract
Cobalt-catalyzed cross-dimerization of simple alkenes with 1,3-enynes is reported. A [2+2] cycloaddition reaction occurred, with alkenes bearing no allylic hydrogen, by reductive elimination of a η(3)-butadienyl cobaltacycle. On the other hand, aliphatic alkenes underwent 1,4-hydroallylation by means of exo-cyclic β-H elimination. These reactions can provide cyclobutenes and allenes that were previously difficult to access, from simple substrates in a highly chemo- and regioselective manner.
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Affiliation(s)
- Akira Nishimura
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871 (Japan), Fax: (+81) 6-6879-7394
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Januszewski JA, Hampel F, Neiss C, Görling A, Tykwinski RR. Unerwartete Bildung eines [4]Radialens und mehrerer Dendralene bei der Addition von Tetracyanoethylen an ein Tetraaryl[5]cumulen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309355] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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39
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Januszewski JA, Hampel F, Neiss C, Görling A, Tykwinski RR. Unexpected Formation of a [4]Radialene and Dendralenes by Addition of Tetracyanoethylene to a Tetraaryl[5]cumulene. Angew Chem Int Ed Engl 2014; 53:3743-7. [DOI: 10.1002/anie.201309355] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Indexed: 11/10/2022]
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40
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Christensen MA, Della Pia EA, Houmøller J, Thomsen S, Wanko M, Bond AD, Rubio A, Brøndsted Nielsen S, Brøndsted Nielsen M. Cross-Conjugation vs. Linear Conjugation in Donor-Bridge-Acceptor Nitrophenol Chromophores. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301642] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Wallbaum J, Neufeld R, Stalke D, Werz DB. A Domino Approach to Dibenzopentafulvalenes by Quadruple Carbopalladation. Angew Chem Int Ed Engl 2013; 52:13243-6. [DOI: 10.1002/anie.201307793] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Indexed: 11/08/2022]
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Wallbaum J, Neufeld R, Stalke D, Werz DB. Ein Dominoprozess zu Dibenzopentafulvalenen mittels vierfacher Carbopalladierung. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201307793] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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43
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Wang H, Beiring B, Yu DG, Collins KD, Glorius F. [3]Dendralensynthese: Rhodium(III)-katalysierte Alkenyl-C-H- Aktivierung und Kupplungsreaktion mit Allenylcarbinolcarbonat. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306754] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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44
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Wang H, Beiring B, Yu DG, Collins KD, Glorius F. [3]Dendralene Synthesis: Rhodium(III)-Catalyzed Alkenyl CH Activation and Coupling Reaction with Allenyl Carbinol Carbonate. Angew Chem Int Ed Engl 2013; 52:12430-4. [DOI: 10.1002/anie.201306754] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Indexed: 11/11/2022]
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45
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Green NJ, Lawrence AL, Bojase G, Willis AC, Paddon-Row MN, Sherburn MS. Domino Cycloaddition Organocascades of Dendralenes. Angew Chem Int Ed Engl 2013; 52:8333-6. [DOI: 10.1002/anie.201302185] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Indexed: 11/09/2022]
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46
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Green NJ, Lawrence AL, Bojase G, Willis AC, Paddon-Row MN, Sherburn MS. Domino Cycloaddition Organocascades of Dendralenes. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302185] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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47
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Emanuelsson R, Wallner A, Ng EAM, Smith JR, Nauroozi D, Ott S, Ottosson H. Cross-hyperconjugation: an unexplored orbital interaction between π-conjugated and saturated molecular segments. Angew Chem Int Ed Engl 2012. [PMID: 23184861 DOI: 10.1002/anie.201206030] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Rikard Emanuelsson
- Department of Chemistry-BMC, Uppsala University, Box 576, 75123 Uppsala, Sweden
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Emanuelsson R, Wallner A, Ng EAM, Smith JR, Nauroozi D, Ott S, Ottosson H. Cross-Hyperconjugation: An Unexplored Orbital Interaction between π-Conjugated and Saturated Molecular Segments. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206030] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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50
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