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US 11,685,755 B2Granted
Dicarbonyl ruthenium and osmium catalysts
AssigneesUniversità degli Studi di Udine, Innovation Factory, Inc.
InventorsWalter Baratta, Salvatore Baldino, Steven Giboulot, Shuanming Zhang
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Abstract
The disclosure relates to dicarbonyl complexes of ruthenium and osmium with bi- and tridentate nitrogen and phosphine ligands. The disclosure relates to methods for preparing these complexes and the use of these complexes, isolated or prepared in situ, as catalysts for reduction reactions of ketones and aldehydes both via transfer hydrogenation or hydrogenation with hydrogen.
Claims20
A hexacoordinate complex of Formula (V), (VI, (VII), (VIII), or (IX):
- MXY(CO)2(HCNN) (V)
- MX(CO)2(CNN) (VI)
- [M(CO)2(CP)(NN)]W (VII)
- MXY(CO)2(HCP)2 (VIII)
- MX(CO)2(CP)(HCP) (IX)
- wherein:
- M is Ru or Os;
- X and Y are, each independently, halide, hydride, C1-C20 carboxylate, or C1-C20 alkoxide,
- W is halide, C1-C20 carboxylate, or C1-C20 alkoxide;
- (I) (NN) is a compound of formula Ia, Ib or Ic:
- (II) (HCNN) is a compound of formula IIa or IIb:
- (III) (CNN) is a ligand of formula IIc or IId:
- wherein R1-R13 are, each independently, H, a C1-C20 aliphatic group, or a C5-C20 aromatic group;
- and
- (V) HCP is a compound of formula (IVa) and CP is a ligand of formula (IVb):
- wherein, R21-R23 are, each independently, H, a C1-C20 aliphatic group, or a C5-C20 aromatic group;
- provided that when M is Ru and
- X=Y=Cl, R23 is not hydrogen in the hexacoordinate complex of formula (VIII);
- and when M is Ru and X=Cl, HCP is not (2,6-dimethylphenyl) diphenylphosphine (Hdmpp) and CP is not the anion of (2,6-dimethylphenyl) diphenylphosphine (dmpp) in the hexacoordinate complex of formula (IX).
16 more elements
Dependencies are inferred from the claim text.