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US 6,664,427 B1Granted
Process for preparing aldehyde compounds
AssigneeE. I. Du Pont de Nemours and Company
InventorsPatrick M. Burke, James Michael Garner, Wilson Tam
Life of this patent
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Abstract
The invention relates to a process for the making organic aldehyde compounds from an unsaturated compound by hydroformylation and in the presence of a catalyst system comprising a Group VIII metal and a bidentate phosphorus ligand having two trivalent phosphorus atoms bound to salicylanilide groups.
Claims11
A hydroformylation process for preparing an organic aldehyde compound from an unsaturated organic compound, said method comprising:
- contacting an unsaturated organic compound with carbon monoxide, hydrogen gas, and a catalyst system, said catalyst system comprising a Group VIII metal, and at least one or a combination of at least two bidentate organic ligands having two trivalent phosphorus atoms, said ligand selected from the group consisting of structure I, II, III, IV, V, and VI:
- where X1-X4 are C1-C6 alkyl, alkoxy, aryloxy, NR6R7, Cl, F, or CF3;
- R1 is independently selected from the group consisting of substituted aryl, phenyl, or fused aromatic ring systems;
- R2 and R3 are independently selected from the group consisting of hydrogen, alkyl, aryl, triarylsilyl, trialkylsilyl, carboalkoxy, carboaryloxy, aryloxy, alkoxy, alkylcarbonyl, arylcarbonyl, or nitrile;
- R4 and R5 are independently selected from the group consisting of hydrogen, alkyl, alkoxy;
- R6 and R7 are independently chosen from alkyl and aryl.
3 more elements
A bidentate ligand having two trivalent phosphorus atoms represented by structure I, II, III, IV, V, or VI:
- where X1-X4 are C1-C6 alkyl, alkoxy, aryloxy, NR6R7, Cl, F, or CF3;
- R1 is independently selected from the group consisting of substituted aryl, phenyl, or fused aromatic ring systems;
- R2 and R3 are independently selected from the group consisting of hydrogen, alkyl, aryl, triarylsilyl, trialkylsilyl, carboalkoxy, carboaryloxy, aryloxy, alkoxy, alkylcarbonyl, arylcarbonyl, or nitrile;
- R4 and R5 are independently selected from the group consisting of hydrogen, alkyl, alkoxy;
- R6 and R7 are independently chosen from alkyl and aryl.
2 more elements
Dependencies are inferred from the claim text.