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US 2002/0173421 A1Published application
Preparation and use of palladium catalysts for cross-coupling reactions
OwnerLars Rodefeld, Thomas Hopfner +1inventors
InventorsLars Rodefeld, Thomas Hopfner, Claus-Peter Reisinger
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Abstract
The invention relates to a process for preparing meterable solutions or dispersions of palladium catalysts, to these solutions or dispersions of such catalysts, and to the use of such catalysts in cross-coupling reactions.
Claims23
A process for preparing a meterable solution or dispersion of a palladium catalyst of the formula
- [Pd(Aryl)L2X]
- where
- Aryl represents a substituted or unsubstituted aryl radical,
- L represents a phosphine ligand, or L2 collectively represents a bisphosphine ligand, and
- X represents an anion,
- comprising reacting
- (1) a substituted or nonsubstituted chloroaromatic, bromoaromatic, iodoaromatic, or arylsulfonate,
- (2) a phosphine or diphosphine ligand, and
- (3) a palladium salt of the formula
- PdY2 or PdY2L′2 or M2[PdY4]
- where
- Y represents an anion of an acid, or Y2 collectively represents a dianion of an acid,
- L′ represents an olefin, a nitrile, a phosphine, or L′2 collectively represents a diolefin, a dinitrile, or a diphosphine, and
- M represents an alkali metal ion, ammonium ion, organic ammonium ion or organic phosphonium ion,
- in the presence of a solvent.
12 more elements
A solution or dispersion of a palladium catalyst of the formula (V),
- [Pd(Aryl)L2X] (V),
- where
- Aryl represents an unsubstituted or substituted aryl radical,
- L represents a phosphine ligand or L2 together represents a bisphosphine ligand,
- X represents chloride, bromide, iodide or a sulfonate.
2 more elements
Dependencies are inferred from the claim text.