1
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Wang T, Guan JX, Tan YX, Tian P. Cobalt-Catalyzed Chemo- and Stereoselective Arylative Carbocyclization of 1,6-Allenynes. Org Lett 2023; 25:5935-5940. [PMID: 37539986 DOI: 10.1021/acs.orglett.3c01958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Different from the well-investigated enynes, transition-metal-catalyzed carbocyclization reactions of allenynes are more attractive as a result of the unique structure and versatile reactivity of allenes. Herein, we report the first cobalt-catalyzed highly chemo- and stereoselective arylative carbocyclization of 1,6-allenynes with arylboronic acids, affording five-membered carbocycles and heterocycles with moderate to high yields, broad substrate scope, and wide functional group compatibility. Moreover, several mechanistic experiments were conducted to gain insight into the reaction process.
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Affiliation(s)
- Tao Wang
- The Research Center of Chiral Drugs, Shanghai Frontiers Science Center of TCM Chemical Biology, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, People's Republic of China
| | - Ji-Xun Guan
- The Research Center of Chiral Drugs, Shanghai Frontiers Science Center of TCM Chemical Biology, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, People's Republic of China
| | - Yun-Xuan Tan
- The Research Center of Chiral Drugs, Shanghai Frontiers Science Center of TCM Chemical Biology, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, People's Republic of China
| | - Ping Tian
- The Research Center of Chiral Drugs, Shanghai Frontiers Science Center of TCM Chemical Biology, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, People's Republic of China
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2
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Deiana L, Badali E, Rafi AA, Tai CW, Bäckvall JE, Córdova A. Cellulose-Supported Heterogeneous Gold-Catalyzed Cycloisomerization Reactions of Alkynoic Acids and Allenynamides. ACS Catal 2023; 13:10418-10424. [PMID: 37560186 PMCID: PMC10407851 DOI: 10.1021/acscatal.3c02722] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/19/2023] [Indexed: 08/11/2023]
Abstract
Herein, we describe efficient nanogold-catalyzed cycloisomerization reactions of alkynoic acids and allenynamides to enol lactones and dihydropyrroles, respectively (the latter via an Alder-ene reaction). The gold nanoparticles were immobilized on thiol-functionalized microcrystalline cellulose and characterized by electron microscopy (HAADF-STEM) and by XPS. The thiol-stabilized gold nanoparticles (Au0) were obtained in the size range 1.5-6 nm at the cellulose surface. The robust and sustainable cellulose-supported gold nanocatalyst can be recycled for multiple cycles without losing activity.
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Affiliation(s)
- Luca Deiana
- Department
of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-85179 Sundsvall, Sweden
| | - Elham Badali
- Department
of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-85179 Sundsvall, Sweden
| | - Abdolrahim A. Rafi
- Department
of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-85179 Sundsvall, Sweden
| | - Cheuk-Wai Tai
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Jan-E Bäckvall
- Department
of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-85179 Sundsvall, Sweden
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Armando Córdova
- Department
of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-85179 Sundsvall, Sweden
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3
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Chen SY, Chang R, Lin ZX, Lin CW, Shen LC, Sue ACH, Tseng MC, Chu JH. Palladium-Mediated C(sp 3)-H Bond Activation of N-Methyl- N-(pyridin-2-yl)benzamide: Direct Arylation/Alkylation and Mechanistic Investigation. J Org Chem 2023. [PMID: 37276376 DOI: 10.1021/acs.joc.3c00429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Herein, we present a facile synthetic methodology to produce a range of N-(CH2-aryl/alkyl)-substituted N-(pyridin-2-yl)benzamides via palladium-mediated C(sp3)-H bond activation. The N-methyl-N-(pyridin-2-yl)benzamide precursor was first reacted with palladium(II) acetate in a stoichiometric manner to obtain the key dinuclear palladacycle intermediates, whose structures were elucidated by mass spectrometric, NMR spectroscopic, and X-ray crystallographic studies in detail. The subsequent C(sp3)-H bond functionalizations on the N-methyl group of the starting substrate show facile productions of the corresponding N-(CH2-aryl/alkyl)-substituted N-(pyridin-2-yl)benzamides with good functional group tolerance. A plausible mechanism was proposed based on density functional theory calculations in conjunction with kinetic isotope effect experiments. Finally, the synthetic transformation from the prepared N-(CH2-aryl)-N-(pyridin-2-yl)benzamides through debenzoylation to N-(CH2-aryl)-2-aminopyridine was successfully demonstrated.
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Affiliation(s)
- Shih-Yun Chen
- Department of Applied Science, National Taitung University, Taitung, Taiwan 95092, R.O.C
| | - Rong Chang
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhong-Xin Lin
- Department of Applied Science, National Taitung University, Taitung, Taiwan 95092, R.O.C
| | - Chien-Wen Lin
- Department of Applied Science, National Taitung University, Taitung, Taiwan 95092, R.O.C
| | - Li-Ching Shen
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, Taiwan 300093, R.O.C
| | - Andrew C-H Sue
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Mei-Chun Tseng
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan 115201, R.O.C
| | - Jean-Ho Chu
- Department of Applied Science, National Taitung University, Taitung, Taiwan 95092, R.O.C
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4
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Xia YT, Li YX, Bi TT, Lian W, Wang X, Yan M, Guo T. Substituents Regulate the Cyclization of Conjugated Alkynes to Accurately Construct Cyclo-( E)-[3]dendralenes. Molecules 2023; 28:molecules28114382. [PMID: 37298858 DOI: 10.3390/molecules28114382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 05/19/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023] Open
Abstract
Substituent-regulated cyclization of conjugated alkynes with acid catalysis was developed in this paper, and it provides a straightforward synthesis of cyclic-(E)-[3]dendralenes. Depending on the electronic effect of the aromatic ring pairing, a variety of phosphinyl quintuplet/hexa cyclo-[3]dendralenes with diverse substitution patterns are accessible, with good efficiency and high stereoselectivity. This self-cyclization process achieves the first precise construction of a phosphinylcyclo-(E)-[3]dendralene from conjugated alkynes to aromatization.
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Affiliation(s)
- Yun-Tao Xia
- College of Chemistry & Chemical Engineering, Henan University of Technology, Academician Workstation for Natural Medicinal Chemistry of Henan Province, Zhengzhou 450001, China
| | - Ya-Xin Li
- College of Chemistry & Chemical Engineering, Henan University of Technology, Academician Workstation for Natural Medicinal Chemistry of Henan Province, Zhengzhou 450001, China
| | - Tong-Tong Bi
- College of Chemistry & Chemical Engineering, Henan University of Technology, Academician Workstation for Natural Medicinal Chemistry of Henan Province, Zhengzhou 450001, China
| | - Wei Lian
- College of Chemistry & Chemical Engineering, Henan University of Technology, Academician Workstation for Natural Medicinal Chemistry of Henan Province, Zhengzhou 450001, China
| | - Xia Wang
- College of Chemistry & Chemical Engineering, Henan University of Technology, Academician Workstation for Natural Medicinal Chemistry of Henan Province, Zhengzhou 450001, China
| | - Meng Yan
- College of Chemistry & Chemical Engineering, Henan University of Technology, Academician Workstation for Natural Medicinal Chemistry of Henan Province, Zhengzhou 450001, China
| | - Tao Guo
- College of Chemistry & Chemical Engineering, Henan University of Technology, Academician Workstation for Natural Medicinal Chemistry of Henan Province, Zhengzhou 450001, China
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5
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Synthesis and Photophysics Characterization of Boronic Styril and Distyryl BODIPYs for Water-Based Dye-Sensitized Solar Cells. Biomimetics (Basel) 2022; 7:biomimetics7030110. [PMID: 35997430 PMCID: PMC9397057 DOI: 10.3390/biomimetics7030110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 07/26/2022] [Accepted: 08/04/2022] [Indexed: 11/25/2022] Open
Abstract
In this study, two boronic acid BODIPYs are obtained through a microwave-assisted Knoevenagel reaction. The aim is to use them for the first time as dyes in a photosensitized solar cell (DSSC) to mimic chlorophyll photosynthesis, harvesting solar light and converting it into electricity. The microwave-assisted Knoevenagel reaction is a straightforward approach to extending the molecular conjugation of the dye and is applied for the first time to synthesize BODIPY’s boronic acid derivatives. These derivatives have proved to be very useful for covalent deposition on titania. This work studies the photo-physical and electrochemical properties. Moreover, the photovoltaic performances of these two new dyes as sensitizers for DSSC are discussed. Experimental data show that both dyes exhibit photosensitizing activities in acetonitrile and water. In particular, in all the experiments, distyryl BODIPY was more efficient than styryl BODIPY. In this study, demonstrating the use of a natural component as a water-based electrolyte for boronic BODIPY sensitizers, we open new possibilities for the development of water-based solar cells.
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6
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Adamczyk-Woźniak A, Sporzyński A. Merging Electron Deficient Boronic Centers with Electron-Withdrawing Fluorine Substituents Results in Unique Properties of Fluorinated Phenylboronic Compounds. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27113427. [PMID: 35684365 PMCID: PMC9182515 DOI: 10.3390/molecules27113427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/20/2022] [Accepted: 05/23/2022] [Indexed: 11/16/2022]
Abstract
Fluorinated boron species are a very important group of organoboron compounds used first of all as receptors of important bioanalytes, as well as biologically active substances, including Tavaborole as an antifungal drug. The presence of substituents containing fluorine atoms increases the acidity of boronic compounds, which is crucial from the point of view of their interactions with analytes or certain pathogen's enzymes. The review discusses the electron acceptor properties of fluorinated boronic species using both the acidity constant (pKa) and acceptor number (AN) in connection with their structural parameters. The NMR spectroscopic data are also presented, with particular emphasis on 19F resonance due to the wide range of information that can be obtained from this technique. Equilibria in solutions, such as the dehydration of boronic acid to form boroxines and their esterification or cyclization with the formation of 3-hydroxyl benzoxaboroles, are discussed. The results of the latest research on the biological activity of boronic compounds by experimental in vitro methods and theoretical calculations using docking studies are also discussed.
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Affiliation(s)
- Agnieszka Adamczyk-Woźniak
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
- Correspondence: (A.A.-W.); (A.S.); Tel.: +48-22-2345737 (A.A.-W.)
| | - Andrzej Sporzyński
- Faculty of Agriculture and Forestry, University of Warmia and Mazury, Oczapowskiego 2, 10-719 Olsztyn, Poland
- Correspondence: (A.A.-W.); (A.S.); Tel.: +48-22-2345737 (A.A.-W.)
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7
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Zheng Z, Deiana L, Posevins D, Rafi AA, Zhang K, Johansson MJ, Tai CW, Córdova A, Bäckvall JE. Efficient Heterogeneous Copper-Catalyzed Alder-Ene Reaction of Allenynamides to Pyrrolines. ACS Catal 2022; 12:1791-1796. [PMID: 35154848 PMCID: PMC8822631 DOI: 10.1021/acscatal.1c05147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 01/11/2022] [Indexed: 12/18/2022]
Abstract
Herein, we describe an efficient nanocopper-catalyzed Alder-ene reaction of allenynamides. The copper nanoparticles were immobilized on amino-functionalized microcrystalline cellulose. A solvent-controlled chemoselectivity of the reaction was observed, leading to the chemodivergent synthesis of pyrrolines (2,5-dihydropyrroles) and pyrroles. The heterogeneous copper catalyst exhibits high efficiency and good recyclability in the Alder-ene reaction, constituting a highly attractive catalytic system from an economical and environmental point of view.
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Affiliation(s)
- Zhiyao Zheng
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Luca Deiana
- Department
of Natural Sciences, Holmgatan 10, Mid Sweden
University, 85179 Sundsvall, Sweden
| | - Daniels Posevins
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Abdolrahim A. Rafi
- Department
of Natural Sciences, Holmgatan 10, Mid Sweden
University, 85179 Sundsvall, Sweden
| | - Kaiheng Zhang
- Department
of Natural Sciences, Holmgatan 10, Mid Sweden
University, 85179 Sundsvall, Sweden
| | - Magnus J. Johansson
- AstraZeneca
R&D, Innovative Medicines, Cardiovascular
and Metabolic Disorders, Medicinal Chemistry, Pepparedsleden 1, SE-431 83 Mölndal, Sweden
| | - Cheuk-Wai Tai
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Armando Córdova
- Department
of Natural Sciences, Holmgatan 10, Mid Sweden
University, 85179 Sundsvall, Sweden
| | - Jan-E. Bäckvall
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
- Department
of Natural Sciences, Holmgatan 10, Mid Sweden
University, 85179 Sundsvall, Sweden
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8
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C de Souza W, Correia JTM, Matos PM, Kisukuri CM, Carneiro PS, Paixão MW. Organophotocatalytic intramolecular formal enyne‐metathesis – An alternative to transition‐metal catalysis. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wanderson C de Souza
- Federal University of Sao Carlos: Universidade Federal de Sao Carlos Chemistry BRAZIL
| | | | - Priscilla M. Matos
- Federal University of Sao Carlos: Universidade Federal de Sao Carlos Chemistry BRAZIL
| | - Camila M Kisukuri
- Federal University of Sao Carlos: Universidade Federal de Sao Carlos Chemistry BRAZIL
| | - Pablo S. Carneiro
- Federal University of Sao Carlos: Universidade Federal de Sao Carlos Chemistry BRAZIL
| | - Márcio Weber Paixão
- Federal University of Sao Carlos Chemistry Rodovia Washington Luis, km 235 - SP-310SP-310 13565905 Sao Carlos BRAZIL
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9
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Liu M, Sun J, Engle KM. Recent advances in the generation and functionalization of C(alkenyl)–Pd species for synthesis of polysubstituted alkenes. Tetrahedron 2022. [DOI: 10.1016/j.tet.2021.132513] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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10
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Equilibria in the 3-(trifluoromethyl)phenylboronic acid - boroxine system. Solubility of the acid and its cyclic esters in organic solvents. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121947] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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11
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Ha S, Lee Y, Kwak Y, Mishra A, Yu E, Ryou B, Park CM. Alkyne-Alkene [2 + 2] cycloaddition based on visible light photocatalysis. Nat Commun 2020; 11:2509. [PMID: 32427846 PMCID: PMC7237675 DOI: 10.1038/s41467-020-16283-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 04/22/2020] [Indexed: 12/31/2022] Open
Abstract
UV-activated alkyne-alkene [2 + 2] cycloaddition has served as an important tool to access cyclobutenes. Although broadly adopted, the limitations with UV light as an energy source prompted us to explore an alternative method. Here we report alkyne-alkene [2 + 2] cycloaddition based on visible light photocatalysis allowing the synthesis of diverse cyclobutenes and 1,3-dienes via inter- and intramolecular reactions. Extensive mechanistic studies suggest that the localized spin densities at sp2 carbons of alkenes account for the productive sensitization of alkenes despite their similar triplet levels of alkenes and alkynes. Moreover, the efficient formation of 1,3-dienes via tandem triplet activation of the resulting cyclobutenes is observed when intramolecular enyne cycloaddition is performed, which may serve as a complementary means to the Ru(II)-catalyzed enyne metathesis. In addition, the utility of the [2 + 2] cycloaddition has been demonstrated by several synthetic transformations including synthesis of various extended π-systems.
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Affiliation(s)
- Sujin Ha
- Department of Chemistry, UNIST (Ulsan National Institute of Science & Technology), Ulsan, 44919, Korea
| | - Yeji Lee
- Department of Chemistry, UNIST (Ulsan National Institute of Science & Technology), Ulsan, 44919, Korea
| | - Yoonna Kwak
- Department of Chemistry, UNIST (Ulsan National Institute of Science & Technology), Ulsan, 44919, Korea
| | - Akash Mishra
- Department of Chemistry, UNIST (Ulsan National Institute of Science & Technology), Ulsan, 44919, Korea
| | - Eunsoo Yu
- Department of Chemistry, UNIST (Ulsan National Institute of Science & Technology), Ulsan, 44919, Korea
| | - Bokyeong Ryou
- Department of Chemistry, UNIST (Ulsan National Institute of Science & Technology), Ulsan, 44919, Korea
| | - Cheol-Min Park
- Department of Chemistry, UNIST (Ulsan National Institute of Science & Technology), Ulsan, 44919, Korea.
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12
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Naidu VR, Bäckvall JE. Synthesis of Cross-Conjugated Polyenes via Palladium-Catalyzed Oxidative C-C Bond Forming Cascade Reactions of Allenes. J Org Chem 2020; 85:5428-5437. [PMID: 32207975 PMCID: PMC7311062 DOI: 10.1021/acs.joc.0c00186] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An efficient palladium-catalyzed oxidative C-C bond forming cascade reaction of allenes involving a coupling between an enallene and an allenyne followed by a carbocyclization of the generated Pd-intermediate was developed. This cascade reaction afforded functionalized cross-conjugated polyenes. The enallene is initially activated by palladium and reacts with the allenyne to give the cross-conjugated polyenes.
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Affiliation(s)
- Veluru Ramesh Naidu
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden.,Department of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-851 79, Sundsvall, Sweden
| | - Jan-E Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden.,Department of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-851 79, Sundsvall, Sweden
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13
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Zhu C, Liu J, Mai BK, Himo F, Bäckvall JE. Efficient Stereoselective Carbocyclization to cis-1,4-Disubstituted Heterocycles Enabled by Dual Pd/Electron Transfer Mediator (ETM) Catalysis. J Am Chem Soc 2020; 142:5751-5759. [PMID: 32101690 PMCID: PMC7307908 DOI: 10.1021/jacs.9b13700] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
![]()
An efficient Pd/ETM
(ETM = electron transfer mediator)-cocatalyzed
stereoselective oxidative carbocyclization of dienallenes under aerobic
oxidation conditions has been developed to afford six-membered heterocycles.
The use of a bifunctional cobalt complex [Co(salophen)-HQ] as hybrid
ETM gave a faster aerobic oxidation than the use of separated ETMs,
indicating that intramolecular electron transfer between the hydroquinone
unit and the oxidized metal macrocycle occurs. In this way, a class
of important cis-1,4-disubstituted six-membered heterocycles,
including dihydropyran and tetrahydropyridine derivatives were obtained
in high diastereoselectivity with good functional group compatibility.
The experimental and computational (DFT) studies reveal that the pendent
olefin does not only act as an indispensable element for the initial
allene attack involving allenic C(sp3)–H
bond cleavage, but it also induces a face-selective reaction of the
olefin of the allylic group, leading to a highly diastereoselective
formation of the product. Finally, the deuterium kinetic isotope effects
measured suggest that the initial allenic C(sp3)–H bond cleavage is the rate-limiting step, which
was supported by DFT calculations.
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Affiliation(s)
- Can Zhu
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Jie Liu
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Binh Khanh Mai
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Jan-E Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden.,Department of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-851 79 Sundsvall, Sweden
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14
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Abstract
Vinylallenes have been synthesized and used as reagents for many years. However,
the number of reviews covering the advances in the chemistry of vinylallenes are
scarce. Most of the information lies in general reviews about allenes or in reviews dedicated
to specific areas of research. Today, vinylallenes are used in the synthesis due to the
special characteristics of this moiety, a diene with a non-conjugated double bond and the
capacity to generate axial chirality. In this review, the most relevant publications
involving vinylallenes, published in the last fifteen years, are compiled. The review
includes new or improved synthetic methods and the reactivity of vinylallenes prepared by
classical or new methods. The reactions of vinylallenes have been classified as Nazarovtype
processes, cycloaddition reactions, and reactions in which vinylallenes are key
intermediates, usually non-isolated but essential for the process to occur. Other types of reactivity are also
included.
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Affiliation(s)
- María M. Afonso
- Departamento de Química Orgánica, Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, La Laguna, Spain
| | - J. Antonio Palenzuela
- Departamento de Química Orgánica, Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, La Laguna, Spain
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15
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Posevins D, Li MB, Svensson Grape E, Inge AK, Qiu Y, Bäckvall JE. Highly Diastereoselective Palladium-Catalyzed Oxidative Cascade Carbonylative Carbocyclization of Enallenols. Org Lett 2020; 22:417-421. [PMID: 31895577 DOI: 10.1021/acs.orglett.9b04134] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A palladium-catalyzed oxidative cascade carbonylative carbocyclization of enallenols was developed. Under mild reaction conditions, a range of cis-fused [5,5] bicyclic γ-lactones and γ-lactams with a 1,3-diene motif were obtained in good yields with high diastereoselectivity. The obtained lactone/lactam products are viable substrates for a stereoselective Diels-Alder reaction with N-phenylmaleimide, providing polycyclic compounds with increased molecular complexity.
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Affiliation(s)
- Daniels Posevins
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Man-Bo Li
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Erik Svensson Grape
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
| | - A Ken Inge
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Youai Qiu
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Jan-E Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
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16
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Zhang J, Shan C, Lv K, Zhu L, Li Y, Liu T, Lan Y. Mechanistic Insight into Palladium-Catalyzed Carbocyclization-Functionalization of Bisallene: A Computational Study. ChemCatChem 2019. [DOI: 10.1002/cctc.201801934] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jing Zhang
- Department of Chemistry and Chemical Engineering; Jining University; Qufu 273155 P. R. China
| | - Chunhui Shan
- School of Chemistry and Chemical Engineering; Chongqing University; Chongqing 400030 P. R. China
| | - Kang Lv
- Department of Chemistry and Chemical Engineering; Jining University; Qufu 273155 P. R. China
| | - Lei Zhu
- School of Chemistry and Chemical Engineering; Chongqing University; Chongqing 400030 P. R. China
| | - Yuanyuan Li
- Cooperative Innovation Center of Lipid Resources and Children's Daily Chemicals; Chongqing University of Education; Chongqing 400030 P. R. China
| | - Tao Liu
- Department of Chemistry and Chemical Engineering; Jining University; Qufu 273155 P. R. China
| | - Yu Lan
- School of Chemistry and Chemical Engineering; Chongqing University; Chongqing 400030 P. R. China
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 P. R. China
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17
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Li MB, Inge AK, Posevins D, Gustafson KPJ, Qiu Y, Bäckvall JE. Chemodivergent and Diastereoselective Synthesis of γ-Lactones and γ-Lactams: A Heterogeneous Palladium-Catalyzed Oxidative Tandem Process. J Am Chem Soc 2018; 140:14604-14608. [DOI: 10.1021/jacs.8b09562] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Man-Bo Li
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - A. Ken Inge
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Daniels Posevins
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Karl P. J. Gustafson
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Youai Qiu
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Jan-E. Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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Yang B, Qiu Y, Bäckvall JE. Control of Selectivity in Palladium(II)-Catalyzed Oxidative Transformations of Allenes. Acc Chem Res 2018; 51:1520-1531. [PMID: 29792667 DOI: 10.1021/acs.accounts.8b00138] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Oxidation reactions play a central role in organic synthesis, and it is highly desirable that these reactions are mild and occur under catalytic conditions. In Nature, oxidation reactions occur under mild conditions via cascade processes, and furthermore, they often occur in an enantioselective manner with many of them involving molecular oxygen or hydrogen peroxide as the terminal oxidant. Inspired by the reactions in Nature, we have developed a number of Pd(II)-catalyzed cascade reactions under mild oxidative conditions. These reactions have an intrinsic advantage of step economy and rely on selectivity control in each step. In this Account, we will discuss the control of chemo-, regio-, and diastereoselectivity in Pd(II)-catalyzed dehydrogenative cascade coupling reactions. The enantioselective version of this methodology has also been addressed, and new chiral centers have been introduced using a catalytic amount of a chiral phosphoric acid (CPA). Research on this topic has provided access to important compounds attractive for synthetic and pharmaceutical chemists. These compounds include carbocyclic, heterocyclic, and polycyclic systems, as well as polyunsaturated open-chain structures. Reactions leading to these compounds are initiated by coordination of an allene and an unsaturated π-bond moiety, such as olefin, alkyne, or another allene, to the Pd(II) center, followed by allene attack involving a C(sp3)-H cleavage under mild reaction conditions. Recent progress within our research group has shown that weakly coordinating groups (e.g., hydroxyl, alkoxide, or ketone) could also initiate the allene attack on Pd(II), which is essential for the oxidative carbocyclization. Furthermore, a highly selective palladium-catalyzed allenic C(sp3)-H bond oxidation of allenes in the absence of an assisting group was developed, which provides a novel and straightforward synthesis of [3]dendralene derivatives. For the oxidative systems, benzoquinone (BQ) and its derivatives are commonly used as oxidants or catalytic co-oxidants (electron transfer mediators, ETMs) together with molecular oxygen. A variety of transformations including carbocyclization, acetoxylation, arylation, carbonylation, borylation, β-hydride elimination, alkynylation, alkoxylation, and olefination have been demonstrated to be compatible with this Pd(II)-based catalytic oxidative system. Recently, several challenging synthetic targets, such as cyclobutenes, seven-membered ring carbocycles, spirocyclic derivatives, functional cyclohexenes, and chiral cyclopentenone derivatives were obtained with high selectivity using these methods. The mechanisms of the reactions were mainly studied by kinetic isotope effects (KIEs) or DFT computations, which showed that in most cases the C(sp3)-H cleavage is the rate-determining step (RDS) or partially RDS. This Account will describe our efforts toward the development of highly selective and atom-economic palladium(II)-catalyzed oxidative transformation of allenes (including enallenes, dienallenes, bisallenes, allenynes, simple allenes, and allenols) with a focus on overcoming the selectivity problem during the reactions.
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Affiliation(s)
- Bin Yang
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Youai Qiu
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Jan-E. Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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Posevins D, Qiu Y, Bäckvall JE. Highly Diastereoselective Palladium-Catalyzed Oxidative Carbocyclization of Enallenes Assisted by a Weakly Coordinating Hydroxyl Group. J Am Chem Soc 2018; 140:3210-3214. [PMID: 29425445 DOI: 10.1021/jacs.7b13563] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A highly diastereoselective palladium-catalyzed oxidative carbocyclization-borylation of enallenes assisted by a weakly coordinating hydroxyl group was developed. The reaction afforded functionalized cyclohexenol derivatives, in which the 1,3-relative stereochemistry is controlled (d.r. > 50:1). Other weakly coordinating oxygen-containing groups (ketone, alkoxide, acetate) also assisted the carbocyclization toward cyclohexenes. The reaction proceeds via a ligand exchange on Pd of the weakly coordinating group with a distant olefin group. The high diastereoselectivity of the hydroxyl-directed reaction could be rationalized by a face-selective coordination of the distant olefin. It was demonstrated that the primary coordination of the close-by oxygen-containing functionality was necessary for the reaction to occur and removal of this functionality shut down the reaction.
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Affiliation(s)
- Daniels Posevins
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Youai Qiu
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Jan-E Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
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