Výsledky vyhledávání - "Robin B. Bedford and"

Can Immobilization of an Inactive Iron Species Switch on Catalytic Activity in the Suzuki Reaction?

Autor: Robin B. Bedford, Sanita B. Tailor

Publikováno v: Tailor, S & Bedford, R B 2019, ' Can immobilization of an inactive iron species switch on catalytic activity in the Suzuki reaction? ', Catalysis Letters . https://doi.org/10.1007/s10562-019-02978-2

We examined the synthetic and catalytic claims that immobilization of an Fe-PNP pincer complex (1) on an amine-modified graphene oxide support yields a useful heterogeneous catalyst for the Suzuki biaryl cross-coupling reaction. Complex 1 is not form

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6e6415aa67bfbeed61323a2179b6127
https://doi.org/10.1007/s10562-019-02978-2

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Revisiting Claims of the Iron-, Cobalt-, Nickel-, and Copper-Catalyzed Suzuki Biaryl Cross-Coupling of Aryl Halides with Aryl Boronic Acids

Autor: Mattia Manzotti, Soneela Asghar, Sanita B. Tailor, Benjamin J. S. Rowsell, Robin B. Bedford, Stephen L. J. Luckham, Hazel A. Sparkes

Publikováno v: Tailor, S, Manzotti, M, Asghar, S, Rowsell, B, Luckham, S, Sparkes, H & Bedford, R 2019, ' Revisiting Claims of the Iron-, Cobalt-, Nickel-, and Copper-Catalyzed Suzuki Biaryl Cross-Coupling of Aryl Halides with Aryl Boronic Acids ', Organometallics, vol. 38, no. 8, pp. 1770-1777 . https://doi.org/10.1021/acs.organomet.9b00083

Intrigued by recent reports on the surprisingly excellent activity of a range of cobalt, iron, copper and nickelbased catalysts in the Suzuki biaryl cross-coupling of simple arylboronic acids with aryl halides, we undertook a reexamination of the syn

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ac5d8e74af5f697c2748863f44e33fe
https://doi.org/10.1021/acs.organomet.9b00083

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The surprisingly facile formation of Pd(i)–phosphido complexes from ortho-biphenylphosphines and palladium acetate

Autor: Hazel A. Sparkes, Anna M. Winnicka, Andrew Horner, Carolina Méndez-Gálvez, David Elorriaga, Jack P.M. Roberts, Robin B. Bedford, Michelle Montgomery, Caitlin R. Bromfield, Harry M. O'Brien

Publikováno v: Montgomery, M, O'Brien, H M, Méndez-Gálvez, C, Bromfield, C R, Roberts, J P M, Winnicka, A M, Horner, A, Elorriaga, D, Sparkes, H A & Bedford, R B 2019, ' The surprisingly facile formation of Pd(I)-phosphido complexes from ortho-biphenylphosphines and palladium acetate ', Dalton Transactions, vol. 48, no. 11, pp. 3539-3542 . https://doi.org/10.1039/c8dt04926b

The widely-used ortho-biphenylphosphine ligands SPhos and RuPhos not only undergo facile orthometallation with palladium acetate, yielding strained, four-membered dimeric palladacycles but more surprisingly, in the presence of alcoholic solvents, alo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0835a785ced1a436239b65b210475f29
https://doi.org/10.1039/c8dt04926b

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The highly surprising behaviour of diphosphine ligands in iron-catalysed Negishi cross-coupling

Autor: June Callison, Sean A. Davis, Harry M. O'Brien, Robin B. Bedford, Diego Gianolio, Stephen L. J. Luckham, David Elorriaga, Peter P. Wells, Hazel A. Sparkes, Antonis M. Messinis, Oscar Hernandez-Fajardo, Emma K. Gibson

Publikováno v: Messinis, A M, Luckham, S L J, Wells, P P, Gianolio, D, Gibson, E K, O’Brien, H M, Sparkes, H A, Davis, S A, Callison, J, Elorriaga, D, Hernandez-Fajardo, O & Bedford, R B 2019, ' The highly surprising behaviour of diphosphine ligands in iron-catalysed Negishi cross-coupling ', Nature Catalysis, vol. 2, no. 2, pp. 123-133 . https://doi.org/10.1038/s41929-018-0197-z

Iron-catalysed cross-coupling is undergoing explosive development, but mechanistic understanding lags far behind synthetic methodology. Here, we find that the activity of iron–diphosphine pre-catalysts in the Negishi coupling of benzyl halides is s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50984acfc41253c3b869fbed99717e5f
https://doi.org/10.1038/s41929-018-0197-z

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Methylenespiro[2.3]hexanes via Nickel-Catalyzed Cyclopropanations with [1.1.1]Propellane

Autor: Robin B. Bedford, Adam Noble, Varinder K. Aggarwal, Songjie Yu

Publikováno v: Yu, S, Noble, A, Bedford, R B & Aggarwal, V K 2019, ' Methylenespiro[2.3]hexanes via Nickel-Catalyzed Cyclopropanations with [1.1.1]Propellane ', Journal of the American Chemical Society, vol. 141, no. 51, 51, pp. 20325-20334 . https://doi.org/10.1021/jacs.9b10689
Journal of the American Chemical Society

[1.1.1]Propellane is a highly strained tricyclic hydrocarbon whose reactivity is dominated by addition reactions across the central inverted bond to provide bicyclo[1.1.1]pentane derivatives. These reactions proceed under both radical and two-electro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fad95668df94eb553d35c110277aa076
https://research-information.bris.ac.uk/en/publications/164218c5-4f74-4188-82bd-3ce48f8f94e2

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Iron-catalysed substrate-directed Suzuki biaryl cross-coupling

Autor: Roman Abrams, Hazel A. Sparkes, Sean A. Davis, Mattia Manzotti, Harry M. O'Brien, David Elorriaga, Robin B. Bedford

Publikováno v: O'Brien, H M, Manzotti, M, Abrams, R D, Elorriaga, D, Sparkes, H A, Davis, S A & Bedford, R B 2018, ' Iron-catalysed substrate-directed Suzuki biaryl cross-coupling ', Nature Catalysis, vol. 1, no. 6, pp. 429-437 . https://doi.org/10.1038/s41929-018-0081-x

Although the replacement of ubiquitous palladium catalysts with more sustainable iron-based analogues continues apace, the simple biaryl Suzuki cross-coupling reaction remains stubbornly elusive. It appears that the main issue hampering the reaction

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08b7d7f0ea3c9fd2cec9ef16d8157054
https://hdl.handle.net/1983/c20322e2-9b26-49a2-90c4-85b0652ca3c0

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Catalyst-Switchable Regiocontrol in the Direct Arylation of Remote CH Groups in Pyrazolo[1,5-a]pyrimidines

Autor: Steven Durrant, Michelle Montgomery, Robin B. Bedford

Publikováno v: Bedford, R B, Durrant, S J & Montgomery, M 2015, ' Catalyst-Switchable Regiocontrol in the Direct Arylation of Remote C—H Groups in Pyrazolo[1,5-a ]pyrimidines ', Angewandte Chemie-International Edition, vol. 54, no. 30, pp. 8787-8790 . https://doi.org/10.1002/anie.201502150
Angewandte Chemie (International Ed. in English)

The regiodivergent palladium-catalyzed CH arylation of pyrazolo[1,5-a]pyrimidine has been achieved, wherein the switch in regioselectivity between positions C3 and C7 is under complete catalyst control. A phosphine-containing palladium catalyst promo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::157787eba05a323ce2d82224c03a5d33
https://doi.org/10.1002/anie.201502150

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Towards Iron-Catalysed Suzuki Biaryl Cross-Coupling: Unusual Reactivity of 2-Halobenzyl Halides

Autor: William Savage, Robin B. Bedford, Timothy Gallagher, Dominic R. Pye

Publikováno v: Synthesis. 47:1761-1765

The reaction of 2-halobenzyl halides with the borate anion Li[(Ph)( t -Bu)Bpin] leads not only to the expected arylation at the benzyl position, but also to some Suzuki biaryl cross-coupling. Preliminary mechanistic investigations hint towards the in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::67d87aa70ce9b418bb10a4f4c448abad
https://doi.org/10.1055/s-0034-1380135

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