Stoichiometric and catalytic reactivity of Ni(6-Mes)(PPh3)2
| Autor: | Sara Sabater, Michael K. Whittlesey, Mary F. Mahon, Michael J. Page |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
010405 organic chemistry
Stereochemistry Organic Chemistry 010402 general chemistry Ring (chemistry) 01 natural sciences Medicinal chemistry Oxidative addition 0104 chemical sciences Catalysis Inorganic Chemistry chemistry.chemical_compound Catalytic transfer hydrogenation chemistry Reactivity (chemistry) Physical and Theoretical Chemistry Carbene Stoichiometry |
| Zdroj: | Sabater, S, Page, M, Mahon, M F & Whittlesey, M K 2017, ' Stoichiometric and catalytic reactivity of Ni(6-Mes)(PPh 3 ) 2 ', Organometallics, vol. 36, no. 9, pp. 1776-1783 . https://doi.org/10.1021/acs.organomet.7b00129 |
| DOI: | 10.1021/acs.organomet.7b00129 |
| Popis: | The three-coordinate Ni(0) N-heterocyclic carbene complex Ni(6-Mes)(PPh3)2 (1; 6-Mes = 1,3-bis(2,4,6-trimethylphenyl)-3,4,5,6-tetrahydropyrimidin-2-ylidene) is formed in the reaction of Ni(cod)2 with a 1:2 mixture of 6-Mes and PPh3 or upon reduction of Ni(6-Mes)(PPh3)Br (2) with KOtBu. Facile substitution of PPh3 in 1 gave a range of Ni(6-Mes)(PPh3)(L) products (L = PhC≡CMe (3), PhCH═CH2 (4), Ph2CO (5), PhCHO (6)). Oxidative addition of C6F6 gave Ni(6-Mes)(PPh3)(C6F5)F (7), while 1 was also oxidized by 4-BrC6H4F to afford a mixture of 2 and Ni(6-Mes)(PPh3)(C6H4F)Br (8). Surprisingly, 1 was also oxidized upon reaction with the small 5-membered ring NHC IMe4 to give the terminal Ni(II) phosphido complex Ni(IMe4)2(PPh2)Ph (9). Compounds 1 and 5 proved to be active as a precursors for the catalytic transfer hydrogenation of ketones. |
| Databáze: | OpenAIRE |
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