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Preformed Pd(II) Catalysts Based on Monoanionic [N,O] Ligands for Suzuki-Miyaura Cross-Coupling at Low Temperature. Catalysts 2023. [DOI: 10.3390/catal13020303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
This paper describes the synthesis and catalytic testing of a palladium complex with a 5-membered chelating [N,O] ligand, derived from the condensation of 2,6-diisopropylphenyl aniline and maple lactone. This catalyst was active towards the Suzuki-Miyaura cross-coupling reaction, and its activity was optimised through the selection of base, solvent, catalytic loading and temperature. The optimised conditions are mild, occurring at room temperature and over a short timescale (1 h) using solvents considered to be ‘green’. A substrate scope was then carried out in which the catalyst showed good activity towards aryl bromides with electron-withdrawing groups. The catalyst was active across a broad scope of electron-donating and high-withdrawing aryl bromides with the highest activity shown for weak electron-withdrawing groups. The catalyst also showed good activity across a range of boronic acids and pinacol esters with even boronic acids featuring strong electron-withdrawing groups showing some activity. The catalyst was also a capable catalyst for the cross-coupling of aryl chlorides and phenylboronic acid. This more challenging reaction requires slightly elevated temperatures over a longer timescale but is still considered mild compared to similar examples in the literature.
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Melník M, Mikuš P. Organodiphosphines in Pt{η2-P(X)nP}Cl2 (n = 9–15, 17, 18) derivatives – Structural aspects. REV INORG CHEM 2020. [DOI: 10.1515/revic-2020-0010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
This review covers over 20 monomeric platinum complexes of Pt{η2-P(X)nP}Cl2 (n = 9–15, 17, 19) type. The chelating P,P-donor ligands create wide varieties of the metallocyclic rings: 12-membered (PC9P, PC3NCNC3P), 13-membered (PC3NC2NC3P), 14-membered (PC11P, PO(SiO)5P, PC2OC2OC2OC2P), 15-membered (PC12P), 16-membered (PCOC9OCP), 17-membered (P(C2O)4C2P), 18-membered (PC2OC9OC2P, PC4NC2NC2NC4P), 20-membered (P(C2O)5C2P), and 21-membered (POC2NC10NC2OP). For these complexes the most common is a predominantly cis-arranged with 17 examples and only four examples with trans-configuration. The total mean values of Pt–L bond distances in the complexes with cis- versus trans-configuration are: 2.252 Å (P trans to Cl), 2.355 Å (Cl trans to P) vs 2.288 Å (P trans to P), and 2.304 Å (Cl trans to Cl). There are examples which exist in cis- and trans-isomeric forms and distortion isomers. A brief survey on the structural data of almost 180 examples of Pt{η2-P(X)nP}Cl2 (n = 1–8) type complexes is added and discussed.
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Affiliation(s)
- Milan Melník
- Faculty of Pharmacy, Department of Pharmaceutical Analysis and Nuclear Pharmacy , Comenius University in Bratislava , Odbojárov 10, SK-832 32 , Bratislava , Slovak Republic
- Faculty of Pharmacy, Toxicological and Antidoping Center , Comenius University in Bratislava , Odbojárov 10, SK-832 32 , Bratislava , Slovak Republic
| | - Peter Mikuš
- Faculty of Pharmacy, Department of Pharmaceutical Analysis and Nuclear Pharmacy , Comenius University in Bratislava , Odbojárov 10, SK-832 32 , Bratislava , Slovak Republic
- Faculty of Pharmacy, Toxicological and Antidoping Center , Comenius University in Bratislava , Odbojárov 10, SK-832 32 , Bratislava , Slovak Republic
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Neda I, Fodor E, Maftei CV, Mihorianu M, Ambrosi HD, Franz MH. New Members of the Cinchona Alkaloid Family: 9-Aminoquincorine-10-aldehyde and 9-Aminoquincoridine-10-aldehyde. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301286] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Mikhel IS, Garland M, Hopewell J, Mastroianni S, McMullin CL, Orpen AG, Pringle PG. Cage Phosphinites: Ligands for Efficient Nickel-Catalyzed Hydrocyanation of 3-Pentenenitrile. Organometallics 2011. [DOI: 10.1021/om101023e] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Igor S. Mikhel
- School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K
| | - Michael Garland
- School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K
| | - Jonathan Hopewell
- School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K
| | - Sergio Mastroianni
- Rhodia, Centre de Recherches et Technologies de Lyon, 85 Rue des Frères Perrets, 69192 Saint-Fons Cedex, France
| | - Claire L. McMullin
- School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K
| | - A. Guy Orpen
- School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K
| | - Paul G. Pringle
- School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K
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Filimon SA, Hrib C, Randoll S, Neda I, Jones P, Tamm M. Quinine-Derived Imidazolidin-2-imine Ligands: Synthesis, Coordination Chemistry, and Application in Catalytic Transfer Hydrogenation. Z Anorg Allg Chem 2010. [DOI: 10.1002/zaac.200900485] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Tötös S, Fild M, Thöne C, Grosu I. Synthesis of new quinuclidine derivatives via Pd-mediated cross-coupling and cross-benzannulation reactions. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.05.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hamama WS, El-Magid OMA, Zoorob HH. Chemistry of quinuclidines as nitrogen bicyclic bridged-ring structures. J Heterocycl Chem 2006; 43:1397-1420. [DOI: 10.1002/jhet.5570430601] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Affiliation(s)
- H. Martin R. Hoffmann
- Department of Organic Chemistry, University of Hannover, Schneiderberg 1B, 30167 Hannover, Germany, Fax: (internat.) +49‐(0)511‐762‐3011
| | - Jens Frackenpohl
- Bayer CropScience GmbH, Gebäude G 836, Industriepark Höchst, 65926 Frankfurt am Main, Germany
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