486453-80-9Relevant academic research and scientific papers
Highly bulky and electron-rich terminal ruthenium phosphido complexes: New donor ligands for palladium-catalyzed Suzuki cross-couplings
Planas, Jose Giner,Gladysz
, p. 6947 - 6949 (2002)
Secondary phosphine complexes of the formula [(η5-C5H5)Ru(L)2- (PHR2)]+ BArF- are prepared from cationic ruthenium N2 complexes and PHR2 (R = Ph (a), t-Bu (b), Cy (c)). Additions of t-BuOK or NaN(SiMe3)2 give the phosphido complexes (η5-C5H5)Ru(L)2 (PR2) ((L)2 = (PEt3)2 (5a-c), depe (6a, b)) in high NMR yields. These rapidly oxidize in air to give isolable RuP(=O)R2 species. Complex 5a is more basic than the rhenium analogue (η5-C5H5)Re(NO)-(PPh3) `(PPh2), and 6b is more basic than P-t-Bu3. Complexes 5a-c and 6b are effective ligands for palladium-catalyzed Suzuki reactions. The catalyst from 6b is nearly as reactive as that from the benchmark ligand P-t-Bu3.
