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Ansteatt S, Uthe B, Mandal B, Gelfand RS, Dunietz BD, Pelton M, Ptaszek M. Engineering giant excitonic coupling in bioinspired, covalently bridged BODIPY dyads. Phys Chem Chem Phys 2023; 25:8013-8027. [PMID: 36876508 DOI: 10.1039/d2cp05621f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Strong excitonic coupling in photosynthetic systems is believed to enable efficient light absorption and quantitative charge separation, motivating the development of artificial multi-chromophore arrays with equally strong or even stronger excitonic coupling. However, large excitonic coupling strengths have typically been accompanied by fast non-radiative recombination, limiting the potential of the arrays for solar energy conversion as well as other applications such as fluorescent labeling. Here, we report giant excitonic coupling leading to broad optical absorption in bioinspired BODIPY dyads that have high photostability, excited-state lifetimes at the nanosecond scale, and fluorescence quantum yields of nearly 50%. Through the synthesis, spectroscopic characterization, and computational modeling of a series of dyads with different linking moieties, we show that the strongest coupling is obtained with diethynylmaleimide linkers, for which the coupling occurs through space between BODIPY units with small separations and slipped co-facial orientations. Other linkers allow for broad tuning of both the relative through-bond and through-space coupling contributions and the overall strength of interpigment coupling, with a tradeoff observed in general between the strength of the two coupling mechanisms. These findings open the door to the synthesis of molecular systems that function effectively as light-harvesting antennas and as electron donors or acceptors for solar energy conversion.
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Affiliation(s)
- Sara Ansteatt
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA.
| | - Brian Uthe
- Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA.
| | - Bikash Mandal
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA.
| | - Rachel S Gelfand
- Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA.
| | - Barry D Dunietz
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA.
| | - Matthew Pelton
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA. .,Department of Physics, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA.
| | - Marcin Ptaszek
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA.
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2
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Tay WS, Pullarkat SA. C-As Bond Formation Reactions for the Preparation of Organoarsenic(III) Compounds. Chem Asian J 2020; 15:2428-2436. [PMID: 32592284 DOI: 10.1002/asia.202000606] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/22/2020] [Indexed: 12/14/2022]
Abstract
Potential widespread applications of organoarsenic chemistry have been limited by the inherent lack of safe and effective As-C bond formation reactions. Several alternative reagents and methods have been developed in the last few decades to address the hazards and drawbacks associated with traditional arsenic synthetic strategies. Herein, this minireview summarizes the advances made in nucleophilic, electrophilic, radical and metal-mediated As(III)-C bond formations while specifically highlighting the behavior of arsenic synthons with various well-established reagents (eg. Grignard reagents, organolithium compounds, organometallic reagents, radical initiators and Lewis/Brønsted bases). Avenues for asymmetric synthesis are also discussed, as are recent advances in organoarsenic chemistry suggesting that arsines exhibit novel reactivities independent from that of other relatively more well explored Group V cogeners.
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Affiliation(s)
- Wee Shan Tay
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Sumod A Pullarkat
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
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Thimma Sambamoorthy M, Rengan R, Jan Grzegorz M. Efficient construction of C–C bonds from aryl halides/aryl esters with arylboronic acids catalysed by palladium(II) thiourea complexes. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Manikandan Thimma Sambamoorthy
- Centre for Organometallic Chemistry, School of ChemistryBharathidasan University Tiruchirappalli 620 024 Tamilnadu India
| | - Ramesh Rengan
- Centre for Organometallic Chemistry, School of ChemistryBharathidasan University Tiruchirappalli 620 024 Tamilnadu India
| | - Malecki Jan Grzegorz
- Department of CrystallographyInstitute of Chemistry, University of Silesia 40‐006 Katowice Poland
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Meares A, Yu Z, Viswanathan Bhagavathy G, Satraitis A, Ptaszek M. Photoisomerization of Enediynyl Linker Leads to Slipped Cofacial Hydroporphyrin Dyads with Strong Through-Bond and Through-Space Electronic Interactions. J Org Chem 2019; 84:7851-7862. [PMID: 31117562 DOI: 10.1021/acs.joc.9b00731] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Photoisomerization of 3,4-di(methoxycarbonyl)-enediyne linker in hydroporphyrin (chlorin or bacteriochlorin) dyads leads to thermally stable cis isomers, where macrocycles adopt a slipped cofacial mutual geometry with an edge-to-edge distance of ∼3.6 Å (determined by density functional theory (DFT) calculations). Absorption spectra exhibit a significant splitting of the long-wavelength Qy band, which indicates a strong electronic coupling with a strength of V = ∼477 cm-1 that increases to 725 cm-1 upon metalation of hydroporphyrins. Each dyad features a broad, structureless emission band, with large Stokes shift, which is indicative of excimer formation. DFT calculations for dyads show both strong through-bond electronic coupling and through-space electronic interactions, due to the overlap of π-orbitals. Overall, geometry, electronic structure, strength of electronic interactions, and optical properties of reported dyads closely resemble those observed for photosynthetic special pairs. Dyads reported here represent a novel type of photoactive arrays with various modes of electronic interactions between chromophores. Combining through-bond and through-space coupling appears to be a viable strategy to engineer novel optical and photochemical properties in organic conjugated materials.
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Affiliation(s)
- Adam Meares
- Department of Chemistry and Biochemistry , University of Maryland, Baltimore County , 1000 Hilltop Circle , Baltimore , Maryland 21250 , United States
| | - Zhanqian Yu
- Department of Chemistry and Biochemistry , University of Maryland, Baltimore County , 1000 Hilltop Circle , Baltimore , Maryland 21250 , United States
| | - Ganga Viswanathan Bhagavathy
- Department of Chemistry and Biochemistry , University of Maryland, Baltimore County , 1000 Hilltop Circle , Baltimore , Maryland 21250 , United States
| | - Andrius Satraitis
- Department of Chemistry and Biochemistry , University of Maryland, Baltimore County , 1000 Hilltop Circle , Baltimore , Maryland 21250 , United States
| | - Marcin Ptaszek
- Department of Chemistry and Biochemistry , University of Maryland, Baltimore County , 1000 Hilltop Circle , Baltimore , Maryland 21250 , United States
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Tay WS, Yang XY, Li Y, Pullarkat SA, Leung PH. Investigating palladium pincer complexes in catalytic asymmetric hydrophosphination and hydroarsination. Dalton Trans 2019; 48:4602-4610. [PMID: 30888384 DOI: 10.1039/c9dt00221a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Given the periodic relationship of phosphines and arsines, is remodeling the catalytic asymmetric hydrophosphination reaction an efficient manner to develop the corresponding hydroarsination reaction? Herein, a chiral PCP-Pd(ii) pincer complex adept at generating enantioenriched phosphines was examined in the asymmetric hydroarsination reaction. Under distinct conditions, tertiary phosphines and arsines were generated in excellent yields (P: 96%, As: 91%) and ees (P: 90%, As: 85%). While secondary arsine reagents were not direct substitutes for the analogous phosphines, important parameters were identified which increased yield and ee of the hydroarsination reaction. Unlike the PCP-PdOAc pincer complex commonly used for hydrophosphinations, hydroarsination reactions involved a PCP-PdCl catalyst with 10 equiv. of CsF for optimal performance. Notable differences between the two reactions and their workup procedures were highlighted to guide further developments in the field. Lastly, respective mechanisms were proposed and contrasted for the activation of HEPh2 (E = P, As).
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Affiliation(s)
- Wee Shan Tay
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore.
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Rzymkowski J, Piątek A. The Development of a Stereoselective Method for the Synthesis of Tetrasubstituted Derivatives ofα,β-Unsaturated Carboxylic Acids. Helv Chim Acta 2016. [DOI: 10.1002/hlca.201600079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jan Rzymkowski
- Faculty of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
| | - Anna Piątek
- Faculty of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
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Endo N, Kanaura M, Iwasawa T. Elucidation of reaction process through β-halogen elimination in CuCN-mediated cyanation of (E)-1-bromo-2-iodoalkene. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.12.063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Dorn SCM, Olsen AK, Kelemen RE, Shrestha R, Weix DJ. Nickel-catalyzed reductive arylation of activated alkynes with aryl iodides. Tetrahedron Lett 2015; 56:3365-3367. [PMID: 26028781 PMCID: PMC4446700 DOI: 10.1016/j.tetlet.2015.02.120] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The direct, regioselective, and stereoselective arylation of activated alkynes with aryl iodides using a nickel catalyst and manganese reductant is described. The reaction conditions are mild (40 °C in MeOH, no acid or base) and an intermediate organomanganese reagent is unlikely. Functional groups tolerated include halides and pseudohalides, free and protected anilines, and a benzyl alcohol. Other activated alkynes including an amide and a ketone also reacted to form arylated products in good yields.
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Affiliation(s)
- Stephanie C. M. Dorn
- Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, NY 14627, USA
| | - Andrew K Olsen
- Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, NY 14627, USA
| | | | | | - Daniel J. Weix
- Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, NY 14627, USA
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Nakatsuji H, Ashida Y, Hori H, Sato Y, Honda A, Taira M, Tanabe Y. (E)- and (Z)-stereodefined enol phosphonates derived from β-ketoesters: stereocomplementary synthesis of fully-substituted α,β-unsaturated esters. Org Biomol Chem 2015; 13:8205-10. [DOI: 10.1039/c5ob01097g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A versatile, robust, and stereocomplementary synthesis of fully-substituted (E)- and (Z)-stereodefined α,β-unsaturated esters 3 from accessible α-substituted β-ketoesters 1via (E)- and (Z)-enol phosphonates was achieved.
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Affiliation(s)
- Hidefumi Nakatsuji
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - Yuichiro Ashida
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - Hiroshi Hori
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - Yuka Sato
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - Atsushi Honda
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - Mayu Taira
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - Yoo Tanabe
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
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Vainer AY, Dyumaev KM, Mareeva SA, Dragunskaya RM, Kamenskaya KP, Nekhamkin LS. Adamantane-based aromatic polyethers with unsaturated groups in backbones and pendant chains of macromolecules. DOKLADY PHYSICAL CHEMISTRY 2014. [DOI: 10.1134/s0012501614020018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Sindhuja E, Ramesh R, Liu Y. Palladium(II) thiocarboxamide complexes: synthesis, characterisation and application to catalytic Suzuki coupling reactions. Dalton Trans 2012; 41:5351-61. [PMID: 22399145 DOI: 10.1039/c2dt12243j] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple route to synthesise palladium(II) complexes from the reaction of N-substituted pyridine-2-thiocarboxamide ligands and PdCl(2)(PPh(3))(2) has been developed. The new complexes are very soluble in common solvents and have been fully characterised (elemental analysis, FT-IR, (1)H, (31)P, (13)C-NMR), including an X-ray diffraction analysis. The molecular structures of all the complexes were determined and reveal the presence of square planar geometry around Pd with little distortion. The complexes were tested in the Suzuki coupling of electronically deactivated aryl and heteroaryl bromides and were found to have much greater activity, without using any promoting additives or phase transfer agent under aerobic conditions. Higher reaction rates are obtained by varying R substituents on the aromatic ring of pyridine-2-thiocarboxamide. The effect of other variables on the cross-coupling reaction, such as temperature, solvent and base, is also reported.
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Affiliation(s)
- Elangovan Sindhuja
- School of Chemistry, Bharathidasan University, Tiruchirappalli-620024, India
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12
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Uberman PM, Lanteri MN, Parajón Puenzo SC, Martín SE. Synthesis of biphenyl-based arsine ligands by Suzuki–Miyaura coupling and their application to Pd-catalyzed arsination. Dalton Trans 2011; 40:9229-37. [DOI: 10.1039/c1dt10207a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Rajagopal T, Flynn AB, Ogilvie WW. Single isomer trisubstituted olefins bearing alkyl groups. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.09.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Uberman PM, Lanteri MN, Martín SE. Highly Efficient Palladium-Catalyzed Arsination. Synthesis of a Biphenyl Arsine Ligand and Its Application to Obtain Perfluoroalkylarsines. Organometallics 2009. [DOI: 10.1021/om900732c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paula M. Uberman
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de Torre y Medina Allende, 5000, Córdoba, Argentina
| | - Mario N. Lanteri
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de Torre y Medina Allende, 5000, Córdoba, Argentina
| | - Sandra E. Martín
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de Torre y Medina Allende, 5000, Córdoba, Argentina
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15
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Perfluoroalkylphosphines and arsines obtained by Pd-catalyzed cross-coupling reaction with organoheteroatom stannanes. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2009.06.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Simard-Mercier J, Jiang JL, Ho ML, Flynn AB, Ogilvie WW. Single-Isomer Trisubstituted Olefins from a Novel Reaction of (E)-β-Chloro-α-iodo-α,β-unsaturated Esters and Amides. J Org Chem 2008; 73:5899-906. [DOI: 10.1021/jo8008325] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Julie Simard-Mercier
- Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
| | - Jojo Liu Jiang
- Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
| | - Michael L. Ho
- Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
| | - Alison B. Flynn
- Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
| | - William W. Ogilvie
- Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
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Simard-Mercier J, Flynn AB, Ogilvie WW. A simple method to prepare single isomer tetrasubstituted olefins by successive Suzuki–Miyaura cross-couplings of E-β-chloro-α-iodo-α,β-unsaturated esters. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.04.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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18
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Naka K, Nakahashi A, Arita M, Chujo Y. Stoichiometric Complexation of Palladium(II) with 1,4-Dihydro-1,4-diarsinine as a Rigid Symmetrical Bidentate Ligand. Organometallics 2008. [DOI: 10.1021/om8000179] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kensuke Naka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Akiko Nakahashi
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Manabu Arita
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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Flynn AB, Ogilvie WW. Stereocontrolled Synthesis of Tetrasubstituted Olefins. Chem Rev 2007; 107:4698-745. [DOI: 10.1021/cr050051k] [Citation(s) in RCA: 467] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Alison B. Flynn
- Department of Chemistry, University of Ottawa, 10 Marie Curie Street, Ottawa, Ontario K1N 6N5, Canada
| | - William W. Ogilvie
- Department of Chemistry, University of Ottawa, 10 Marie Curie Street, Ottawa, Ontario K1N 6N5, Canada
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Zhang L, Meng T, Fan R, Wu J. General and efficient route for the synthesis of 3,4-disubstituted coumarins via Pd-catalyzed site-selective cross-coupling reactions. J Org Chem 2007; 72:7279-86. [PMID: 17705544 DOI: 10.1021/jo071117+] [Citation(s) in RCA: 113] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Palladium-catalyzed site-selective cross-coupling reactions of 3-bromo-4-trifloxycoumarin or 3-bromo-4-tosyloxycoumarin provide an efficient and facile route for the synthesis of 3,4-disubstituted coumarins, which include 3,4-diarylcoumarins, 3-amino-4-arylcoumarins, and 3-aryl-4-aminocoumarins. The order of reactivity of the (pseudo)halide substituents in the coumarins was found to be 4-OTf > 3-Br > 4-OTs.
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Affiliation(s)
- Liang Zhang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, People's Republic of China
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Lemay AB, Vulic KS, Ogilvie WW. Single-Isomer Tetrasubstituted Olefins from Regioselective and Stereospecific Palladium-Catalyzed Coupling of β-Chloro-α-iodo-α,β-unsaturated Esters. J Org Chem 2006; 71:3615-8. [PMID: 16626150 DOI: 10.1021/jo060144h] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The efficient regioselective and stereospecific synthesis of tetrasubstituted olefins using a mild and convenient method is disclosed. 2-Alkynyl esters are selectively converted to E-beta-chloro-alpha-iodo-alpha,beta-unsaturated esters by exposure to Bu4NI in refluxing dichloroethane. These products are produced cleanly, regio- and stereoselectively, and in high yields. Single-isomer tetrasubstituted olefins bearing four different carbon substituents are then synthesized by sequential palladium-catalyzed coupling reactions. Selectivity results from reactivity differences in the intermediate substrates.
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Affiliation(s)
- Alison B Lemay
- Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada K1N 6N5
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22
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Synthesis of 3-arylisocoumarins, including thunberginols A and B, unsymmetrical 3,4-disubstituted isocoumarins, and 3-ylidenephthalides via iodolactonization of methyl 2-ynylbenzoates or the corresponding carboxylic acids. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00212-6] [Citation(s) in RCA: 133] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Vicart N, Saboukoulou GS, Ramondenc Y, Plé G. Palladium Catalyzed Cross-Coupling Reaction of Functional Organozinc Reagents with (2E,4E)- and (2E,4Z)-5-Bromopenta-2,4-dienals: Easy Access to Functional Conjugated Dienic Aldehydes. SYNTHETIC COMMUN 2003. [DOI: 10.1081/scc-120018769] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Biagetti M, Bellina F, Carpita A, Viel S, Mannina L, Rossi R. Selective Synthesis of 5,6-Disubstituted 3-Methyl-2(2H)-pyranones and 6-Substituted 3-Methyl-2(2H)-pyranones, Including Fusalanipyrone and Gibepyrone A. European J Org Chem 2002. [DOI: 10.1002/1099-0690(200203)2002:6<1063::aid-ejoc1063>3.0.co;2-m] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Selective synthesis of natural and unnatural 5,6-disubstituted 2(2H)-pyranones via iodolactonization of 5-substituted (Z)-2-en-4-ynoic acids. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00139-9] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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First total synthesis of the 7,6′-coupled antifungal naphthylisoquinoline alkaloid dioncophylline B 1. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(00)01110-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Rossi R, Bellina F, Biagetti M, Mannina L. Stereocontrolled synthesis of lissoclinolide by sequential transition metal-catalyzed lactonization/cross-coupling reactions. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)01705-5] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Rossi R, Bellina F, Mannina L. A novel protocol for the stereoselective synthesis of variously substituted (Z)-5-ylidene-5H-furan-2-ones. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00322-0] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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29
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30
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Rossi R, Bellina F. SELECTIVE TRANSITION METAL-PROMOTED CARBON-CARBON AND CARBON-HETEROATOM BOND FORMATION. A REVIEW. ORG PREP PROCED INT 1997. [DOI: 10.1080/00304949709355180] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Selective palladium-mediated CarbonOxygen bond and CarbonSulfur bond forming reactions which involve functionalized Csp2-Hybridized halides or triflates and Csp-Hybridized halides. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(96)01027-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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