Abstract
The Ru complexes Ru(PPh3)3(CO)(C2H4) (1) and RuH(o-C6H4C(O)CH3)(L)(PPh3)2 (2, L = PPh3; 3, L = CO; 4, L = DMSO) were prepd. to assess their activity for catalyzing the insertion of alkenes into the ortho C-H bond of arom. ketones (Murai reaction). Treatment of RuH2(CO)(PPh3)3 with ethene in refluxing toluene afforded 1, which was characterized by multinuclear NMR spectroscopy and x-ray crystallog. Excess acetophenone reacted with Ru(H2)H2(PPh3)3 to give RuH(o-C6H4C(O)CH3)(PPh3)3 (2), which loses PPh3 upon addn. of CO or DMSO to give RuH(o-C6H4C(O)CH3)(CO)(PPh3)2 (3) and RuH(o-C6H4C(O)CH3)(DMSO)(PPh3)2 (4), resp. The x-ray crystal structures of both of these compds. were detd. The activity for catalyzing the reaction of 2'-methylacetophenone with triethoxyvinylsilane follows the order RuH2(CO)(PPh3)3 > 2 > 1 > 4. Complex 3, along with both RuH2(CO)(AsPh3)3 and RuH2(CO)(dppp)(PPh3) (dppp = Ph2P(CH2)3PPh2), show essentially zero catalytic activity.
| Original language | English |
|---|---|
| Pages (from-to) | 3745-3751 |
| Number of pages | 7 |
| Journal | Organometallics |
| Volume | 20 |
| Issue number | 17 |
| Publication status | Published - 2001 |
Keywords
- Murai coupling triethoxyvinylsilane methylacetophenone ruthenium catalyzed
- mol structure ruthenium ortho metalated acetophenone triphenylphosphine hydride complex
- ruthenium catalyzed coupling of triethoxyvinylsilane with methylacetophenone)
- Molecular structure (of ortho-metalated acetophenone triphenylphosphine ruthenium hydride complexes)
- crystal structure ruthenium ortho metalated acetophenone triphenylphosphine hydride complex
- Crystal structure
- Coupling reaction catalysts (ruthenium-catalyzed Murai-type coupling of methylacetophenone with triethoxyvinylsilane)
- Coupling reaction (Murai
- ruthenium hydride ortho metalated acetophenone triphenylphosphine complex prepn catalyst