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Marcos-Ayuso G, Peñas-Defrutos MN, Gallego AM, García-Melchor M, Martínez-Ilarduya JM, Espinet P. Problematic Ar F-Alkynyl Coupling with Fluorinated Aryls. From Partial Success with Alkynyl Stannanes to Efficient Solutions via Mechanistic Understanding of the Hidden Complexity. J Am Chem Soc 2023; 145:527-536. [PMID: 36542758 PMCID: PMC9837839 DOI: 10.1021/jacs.2c10842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The synthesis of aryl-alkynyl compounds is usually achieved via Sonogashira catalysis, but this is inefficient for fluorinated aryls. An alternative method reported by Shirakawa and Hiyama, using alkynylstannanes and hemilabile PN ligands, works apparently fine for conventional aryls, but it is also poor for fluorinated aryls. The revision of the unusual literature cycle reveals the existence and nature of unreported byproducts and uncovers coexisting cycles and other aspects that explain the reasons for the conflict. This knowledge provides a full understanding of the real complexity of these aryl/alkynylstannane systems and the deviations of their evolution from that of a classic Stille process, providing the clues to design several very efficient alternatives for the catalytic synthesis of the desired ArF-alkynyl compounds in almost quantitative yield. The same protocols are also very efficient for the catalytic synthesis of alkynyl-alkynyl' hetero- and homocoupling.
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Affiliation(s)
- Guillermo Marcos-Ayuso
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid E-47071, Spain
| | - Marconi N Peñas-Defrutos
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid E-47071, Spain.,School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Ana M Gallego
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid E-47071, Spain
| | - Max García-Melchor
- School of Chemistry, CRANN and AMBER Research Centres, Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Jesús M Martínez-Ilarduya
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid E-47071, Spain
| | - Pablo Espinet
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Valladolid E-47071, Spain
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2
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Polydentate P, N-based ligands for palladium-catalyzed cross-coupling reactions. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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3
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Santiago TG, Urbaneja C, Álvarez E, Ávila E, Palma P, Cámpora J. Neutral, cationic and anionic organonickel and -palladium complexes supported by iminophosphine/phosphinoenaminato ligands. Dalton Trans 2020; 49:322-335. [PMID: 31802075 DOI: 10.1039/c9dt04062e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a series of organometallic nickel and palladium complexes containing iminophosphine ligands R2PCH2C(Ph) = N-Dipp (Dipp = 2,6-diisopropylphenyl; R = iPr, La; R = Ph, Lb; and R = o-C6H4OMe, Lc), synthesized by ligand exchange or oxidative addition reactions, and we investigate the capacity of such ligands to undergo reversible deprotonation to the corresponding phosphinoenaminato species. In the attempted ligand exchange reaction of the nickel bis(trimethylsilyl)methyl precursor [Ni(CH2SiMe3)2Py2] with Lb, the iminophosphine acts as a weak acid rather than a neutral ligand, cleaving one of the Ni-C bonds, to afford the phosphinoenaminato complex [Ni(CH2SiMe3)(L'b)(Py)] (L'b = conjugate base of Lb). We disclose a general method for the syntheses of complexes [Ni(CH2SiMe3)(L)(Py)]+ (L = La, Lb or Lc), and demonstrate that iminophosphine deprotonation is a general feature and occurs reversibly in the coordination sphere of the metal. By studying proton exchange reactions of the cation [Ni(CH2SiMe3)(Lb)(Py)]+ with bases of different strength we show that the conjugate phosphinoenaminato ligand in [Ni(CH2SiMe3)(L'b)(Py)] is a base with strength comparable to DBU in THF. The acyl group in the functionalized aryl complex [Ni(p-C6H4COCH3)(Br)(La)] does not interfere in the iminophosphine deprotonation with NaH. The latter reaction affords the unusual anionic hydroxide species [Ni(p-C6H4COCH3)(OH)(L'a)]-Na+, which was isolated and fully characterized.
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Affiliation(s)
- Tomás G Santiago
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla. CIC-Cartuja, c/Américo Vespucio, 49, 41092, Sevilla, Spain.
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Kukowski JE, Stepanova VA, Smoliakova IP. Reactions of cyclopalladated complexes with HPPh2 resulting in ligand phosphination. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.12.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Brown CC, Stephan DW. Rearrangements of phosphinoimines to phosphine-imines in ruthenium chelate complexes. Dalton Trans 2012; 41:9431-8. [PMID: 22735623 DOI: 10.1039/c2dt30505d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thermal reaction of 1:1 mixtures of the RuCl(2)(PPh(3))(3) and phosphinoimine R(2)PN=CPh(2) (R = Ph, iPr, Me) at 140 °C results in isolation of the dimeric species [RuCl(μ-Cl)(PPh(3))(C(6)H(4)(PPh(2))C(Ph)NH)](2) (R = Ph 1, iPr 2, Me 3) containing phosphine-imine chelating ligands. Subsequent reaction of 1 and 3 with one equivalent of pyridine at room temperature give RuCl(2)(PPh(3))(py)(C(6)H(4)(PR(2))C(Ph)NH) (R = Ph 4, Me 5). Excess pyridine reacts with 2 to give a mixture of the cis and trans-isomers of RuCl(2)(py)(2)(C(6)H(4)(PiPr(2))C(Ph)NH) 6 and 7 respectively. Treatment of 5 with excess PPh(3) affords RuCl(2)(PPh(3))(2)(C(6)H(4)(PMe(2))C(Ph)NH) 8. Aspects of the mechanism of the thermal rearrangements of the phosphinoimine to the phosphine-imine ligands are considered and the isolation of RuCl(2)(Ph(2)PN=CPh(2))(SIMes)(CHPh) 9 and RuCl(2)(PPh(3))(2)(HN=C(Ph)C(6)H(4)) 10 provide support for a proposed mechanism involving a intermediate containing a Ru-bound metallated aryl-imine fragment.
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Affiliation(s)
- Christopher C Brown
- Department of Chemistry, University of Toronto, 80 St George St, Toronto, Ontario M5S3H6, Canada
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Pérez-Temprano MH, Gallego AM, Casares JA, Espinet P. Stille Coupling of Alkynyl Stannane and Aryl Iodide, a Many-Pathways Reaction: The Importance of Isomerization. Organometallics 2011. [DOI: 10.1021/om100978w] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mónica H. Pérez-Temprano
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, E-47071 Valladolid, Spain
| | - Ana M. Gallego
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, E-47071 Valladolid, Spain
| | - Juan A. Casares
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, E-47071 Valladolid, Spain
| | - Pablo Espinet
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, E-47071 Valladolid, Spain
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Vicente J, Abad JA, López-Sáez MJ, Jones PG. Carbopalladation of Maleate and Fumarate Esters and 1,1-Dimethylallene with Ortho-Substituted Aryl Palladium Complexes. Organometallics 2009. [DOI: 10.1021/om900957s] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- José Vicente
- Grupo de Química Organometálica, Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Aptdo. 4021, E-30071 Murcia, Spain
| | - José Antonio Abad
- Grupo de Química Organometálica, Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Aptdo. 4021, E-30071 Murcia, Spain
| | - María-José López-Sáez
- Grupo de Química Organometálica, Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Aptdo. 4021, E-30071 Murcia, Spain
| | - Peter G. Jones
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Postfach 3329, 38023 Braunschweig, Germany
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Scrivanti A, Bertoldini M, Matteoli U, Antonaroli S, Crociani B. [PdCl2{8-(di-tert-butylphosphinooxy)quinoline)}]: a highly efficient catalyst for Suzuki–Miyaura reaction. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.06.099] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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9
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Rhodium(I) iminophosphine poly(propyleneimine) dendrimers: Synthesis, characterization and molecular structure of a mononuclear analogue. INORG CHEM COMMUN 2009. [DOI: 10.1016/j.inoche.2009.05.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Liu Q, Lan Y, Liu J, Li G, Wu YD, Lei A. Revealing a Second Transmetalation Step in the Negishi Coupling and Its Competition with Reductive Elimination: Improvement in the Interpretation of the Mechanism of Biaryl Syntheses. J Am Chem Soc 2009; 131:10201-10. [DOI: 10.1021/ja903277d] [Citation(s) in RCA: 144] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Qiang Liu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China, College of Chemistry, Peking University, Beijing, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 354 Fenglin Lu Shanghai, 200032, China
| | - Yu Lan
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China, College of Chemistry, Peking University, Beijing, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 354 Fenglin Lu Shanghai, 200032, China
| | - Jing Liu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China, College of Chemistry, Peking University, Beijing, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 354 Fenglin Lu Shanghai, 200032, China
| | - Gang Li
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China, College of Chemistry, Peking University, Beijing, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 354 Fenglin Lu Shanghai, 200032, China
| | - Yun-Dong Wu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China, College of Chemistry, Peking University, Beijing, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 354 Fenglin Lu Shanghai, 200032, China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China, College of Chemistry, Peking University, Beijing, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 354 Fenglin Lu Shanghai, 200032, China
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Shukla KH, DeShong P. Studies on the mechanism of allylic coupling reactions: a hammett analysis of the coupling of aryl silicate derivatives. J Org Chem 2008; 73:6283-91. [PMID: 18616321 DOI: 10.1021/jo8010254] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hammett analysis of the palladium-catalyzed allyl-aryl coupling reaction has demonstrated that the rate of the coupling reaction is enhanced by electron-withdrawing groups on the aryl siloxane. The positive slope of the Hammett plot indicated involvement of a charged transition state in which negative charge on the aryl ring is stabilized inductively. This result is consistent with either transmetalation or reductive elimination being the rate-determining step in the coupling process. Furthermore, the influence of ligand on the metal site has been assessed from competition studies as a function of ligand type, cone angle, and electronic effects. From the relative ratios of coupling products produced in the Hammett study, it is possible to gather insight into the role of the electronic as well as the steric effects of ligands on the mechanism of the coupling reaction.
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Affiliation(s)
- Krupa H Shukla
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
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12
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Johnson J, Rovis T. More than Bystanders: The Effect of Olefins on Transition-Metal-Catalyzed Cross-Coupling Reactions. Angew Chem Int Ed Engl 2008; 47:840-71. [DOI: 10.1002/anie.200700278] [Citation(s) in RCA: 323] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Johnson J, Rovis T. Nicht ganz unbeteiligt: der Einfluss von Olefinen auf übergangsmetallkatalysierte Kreuzkupplungen. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200700278] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Best J, Wilson JM, Adams H, Gonsalvi L, Peruzzini M, Haynes A. Reactivity of Rhodium(I) Iminophosphine Carbonyl Complexes with Methyl Iodide. Organometallics 2007. [DOI: 10.1021/om070019b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jonathan Best
- Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K., and Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino (Firenze), Italy
| | - John M. Wilson
- Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K., and Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino (Firenze), Italy
| | - Harry Adams
- Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K., and Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino (Firenze), Italy
| | - Luca Gonsalvi
- Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K., and Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino (Firenze), Italy
| | - Maurizio Peruzzini
- Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K., and Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino (Firenze), Italy
| | - Anthony Haynes
- Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, U.K., and Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino (Firenze), Italy
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Redshaw C, Gibson VC, Elsegood MRJ, Clegg W. New coordination modes at molybdenum for 2-diphenylphosphinoaniline derived ligands. Chem Commun (Camb) 2007:1951-3. [PMID: 17695240 DOI: 10.1039/b700158d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The complexes [MoCl3(1-N,2-Ph2P-C6H4)2] (1) and {MoCl(Nt-Bu)[1-micro(N),2-(Ph2P)C6H4]}2 (2) have been obtained from the reaction of 2-diphenylphosphinoaniline [1,2(NH2)(Ph2P)C6H4] with either sodium molybdate [Na2MoO4] (in the presence of Et3N and Me3SiCl) or [MoCl2(Nt-Bu)2(DME)]; the crystal structure of 1 reveals a novel MoNC2PN six-membered conjugated ring system derived from a P-N coupling reaction between two ligands, whilst that of 2 reveals bridging imido/terminal phosphine ligation.
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Affiliation(s)
- Carl Redshaw
- Wolfson Materials and Catalysis Centre, School of Chemical Sciences and Pharmacy, The University of East Anglia, Norwich, UK.
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Synthesis and structural characterization of mercury(II) complexes with a novel ferrocenyliminophosphine. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2006.01.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Pei Y, Brulé E, Moberg C. Modular multidentate phosphine ligands: application to palladium-catalyzed allylic alkylations. Org Biomol Chem 2006; 4:544-50. [PMID: 16446813 DOI: 10.1039/b513906f] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multidentate phosphines were readily obtained by reaction of chiral multidentate amines, prepared via ring opening of (S)-N-tosyl-2-isopropylaziridine with ammonia, primary, and secondary amines, with achiral phosphorus containing building blocks. The phosphines were used in palladium-catalyzed alkylation of rac-3-cyclohexenyl and cyclopentenyl carbonates. The enantioselectivity and reactivity were largely dependent on the structure of the amine core of the ligands. Up to 88% ee was observed in reactions with the six-membered substrate.
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Affiliation(s)
- Yuxin Pei
- Department of Chemistry, Organic Chemistry, Royal Institute of Technology, SE 100 44, Stockholm, Sweden
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Crociani B, Antonaroli S, Marini A, Matteoli U, Scrivanti A. Mechanistic study on the coupling reaction of aryl bromides with arylboronic acids catalyzed by (iminophosphine)palladium(0) complexes. Detection of a palladium(ii) intermediate with a coordinated boron anion. Dalton Trans 2006:2698-705. [PMID: 16804582 DOI: 10.1039/b514405a] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The complexes [Pd(eta2-dmfu)(P-N)] [P-N = 2-(PPh2)C6H4-1-CH=NR, R = C(6)H(4)OMe-4; CHMe2; C6H3Me2-2,6; C6H3(CHMe2)-2,6] react with an excess of BrC6H4R1-4 (R1= CF3; Me) yielding the oxidative addition products [PdBr(C6H4R1-4)(P-N)] at different rates depending on R [C6H4OMe-4 > C6H3(CHMe2)-2,6 > CHMe2 approximately C6H3Me2-2,6] and R1 (CF3>> Me). In the presence of K2CO3 and activated olefins (ol = dmfu, fn), the latter compounds react with an excess of 4-R2C6H4B(OH)2 (R2= H, Me, OMe, Cl) to give [Pd(eta2-ol)(P-N)] and the corresponding biaryl through transmetallation and fast reductive elimination. The transmetallation proceeds via a palladium(II) intermediate with an O-bonded boron anion, the formation of which is markedly retarded by increasing the bulkiness of R. The intermediate was isolated for R = CHMe2, R1 = CF3 and R2= H. The boron anion is formulated as a diphenylborinate anion associated with phenylboronic acid and/or as a phenylboronate anion associated with diphenylborinic acid. In general, the oxidative addition proceeds at a lower rate than transmetallation and represents the rate-determining-step in the coupling reaction of aryl bromides with arylboronic acids catalyzed by [Pd(eta2-dmfu)(P-N)].
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Affiliation(s)
- Bruno Crociani
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata", Via della Ricerca Scientifica 00133, Roma, Italy.
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Catalytic activity of η2-(olefin)palladium(0) complexes with iminophosphine ligands in the Suzuki–Miyaura reaction. Role of the olefin in the catalyst stabilization. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.06.079] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Pla-Quintana A, Roglans A, de Julián-Ortiz JV, Moreno-Mañas M, Parella T, Benet-Buchholz J, Solans X. Structural Analysis of Chiral Complexes of Palladium(0) with 15-Membered Triolefinic Macrocyclic Ligands. Chemistry 2005; 11:2689-97. [PMID: 15736278 DOI: 10.1002/chem.200401073] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The complete structural analysis of the palladium complexes of the triolefinic macrocycles (E,E,E)-1,6,11-tris(arylsulfonyl)-1,6,11-triazacyclopentadeca-3,8,13-trienes, which featured from three identical to three different aryl groups, was achieved by performing X-ray diffraction studies, NMR spectroscopy, and other calculations. The stereochemical complexity is determined by the different isomers formed through complexation of the metal to one or other face of each of the three olefins involved. The palladacyclopropane formulation of the palladium-olefin interaction offers a clear picture of the stereogenicity of the olefin carbon atoms that are complexed to the metal. The energetically favorable isomers were identified in the solid-state and in solution by performing X-ray diffraction and NMR spectroscopic analysis, respectively.
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Affiliation(s)
- Anna Pla-Quintana
- Department of Chemistry, Universitat de Girona, Campus de Montilivi, 17071 Girona, Spain
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Iminophosphine–palladium(0) complexes as highly active catalysts in the Suzuki reaction. Synthesis of undecaaryl substituted corroles. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.05.144] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Crociani B, Antonaroli S, Canovese L, Uguagliati P, Visentin F. Kinetic Studies of the Oxidative Addition and Transmetallation Steps Involved in the Cross-Coupling of Alkynyl Stannanes with Aryl Iodides Catalysed byη2-(Dimethyl fumarate)(iminophosphane)palladium(0) Complexes. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200300376] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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