| Autor: |
Palio, Lorenzo, Bru, Francis, Ruggiero, Tommaso, Bourda, Laurens, Van Hecke, Kristof, Cazin, Catherine, Nolan, Steven P. |
| Předmět: |
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| Zdroj: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 11/28/2024, Vol. 53, p18013-18020, 8p |
| Abstrakt: |
Despite the widespread use of well-defined PdII complexes as pre-catalysts for cross-coupling processes, the role of the throw-away ligand is still underexplored. In this work we focused on the complexes of the type [Pd(NHC)(η3-R-allyl)Cl] (NHC = N-heterocyclic carbene) and we investigated the influence of the R substitution on the allyl moiety. Starting from the already described [Pd(IPr)(η3-cinnamyl)Cl] and [Pd(IPr*)(η3-cinnamyl)Cl] (IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene, IPr* = N,N′-1,3-bis[2,6-bis(diphenylmethyl)-4-methylphenyl]imidazol-2-ylidene) we prepared eight new complexes bearing new substitutions on the cinnamyl motif and we tested them in the C–N bond formation to evaluate the effect of the throw-away ligand modification in the catalytic activity. In addition, we studied the undesired formation of the less active off-cycle [Pd I2 (NHC)2(η3-R-allyl)(μ-Cl)] dimers from the corresponding PdII complexes to evaluate the role of the new throw-away ligands on the inhibition of this process. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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