1426142-14-4Relevant articles and documents
Gold compounds anchored to a metalated arene scaffold: Synthesis, X-ray molecular structures, and cycloisomerization of enyne
Dubarle-Offner, Julien,Barbazanges, Marion,Auge, Myleine,Desmarets, Christophe,Moussa, Jamal,Axet, M. Rosa,Ollivier, Cyril,Aubert, Corinne,Fensterbank, Louis,Gandon, Vincent,Malacria, Max,Gontard, Geoffrey,Amouri, Hani
, p. 1665 - 1673 (2013/05/09)
A novel series of π-complexes of phosphino ligands, [Cp*Ru(η 6-arene-PAr2)][OTf], has been prepared in which the diarylphosphine unit is attached to a metalated π-arene scaffold. These organometallic phosphino ligands display either an electron-donating methyl group (-PAr2 = -P(p-tol)2) or electron-withdrawing trifluoromethyl group (-PAr2 = -P(p-C6H4CF 3)2). This unique class of metallo ligands was converted to heterodinuclear gold complexes upon treatment with [AuCl(tht)]. The molecular structures of [Cp*Ru(η6-p-CH3C 6H4-P(p-tol)2-Au-Cl)][OTf] and [Cp*Ru(η6-C6H5-P(p-C 6H4CF3)2)-Au-Cl][OTf] were ascertained by single-crystal X-ray diffraction. A comparative study of these structures with that of [Cp*Ru(η6-C6H 5-PPh2-Au-Cl)][OTf] previously reported revealed important information about the electronic nature of the gold center when it is bonded to a -PPh2, -P(p-tol)2, or -P(p-C6H 4CF3)2 metallo ligand. DFT computations also shed light on the effect of [Cp*Ru+] coordination to [AuCl(PAr3)] precatalysts. Several complexes of the family with electron-donating and -withdrawing groups were evaluated toward cycloisomerization reactions of a classical N-tethered 1,6-enyne. These results are presented and discussed.
