Immobilized metal complex catalysts, process for preparation thereof and use thereof
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Abstract
The present invention provides a novel immobilized metal complex catalyst of Formula I
wherein M is a Group VIII metal, Lx is a phosphine ligand, n is an integer with a value between 2 and 6, MLx is an organometallic complex.
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Citations
23 Claims
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1-11. -11. (canceled)
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12. A process for the carbonylation of an aryl olefin or an alcohol of Formulae III and IV respectively,
wherein R1, R2, R3, R4 and R are independently selected from the group consisting of hydrogen, alkyl, aryl, arylalkyl and arylalkyl cycloaromatic group with or without substituents; - which comprises reacting the aryl olefin or alcohol with carbon monoxide (CO) and water (H2O) as reagents, in the presence of an immobilized metal complex catalyst of Formula I,
wherein M is a Group VIII metal, Lx is a phosphine ligand, n is an integer with a value between 2 and 6, MLx is an organometallic complex, and in the presence of a promoter selected from an alkali metal halide, and a proton source, in an organic solvent, heating the reaction mixture to a temperature between 30 to 120°
C., for a period of 8 hours to 24 hours at a pressure ranging from 1 to 60 atm, cooling the reaction mixture thereafter to ambient temperature, flushing the mixture with inert gas, removing the catalyst by filtration, removing the solvent and isolating a product comprising an isomeric saturated carboxylic acid of Formula V,wherein R1, R2, R3, R4 are independently selected from the group consisting of hydrogen, alkyl, aryl, arylalkyl and arylalkyl cycloaromatic group with or without substituents;
R is H or a carboxylic acid group —
COOH and R5 is H or a carboxylic acid group —
COOH, provided that when R is H, R5 is —
COOH and when R is —
COOH, R5 is H;
in a chemo-selective and regioselective manner.- View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- which comprises reacting the aryl olefin or alcohol with carbon monoxide (CO) and water (H2O) as reagents, in the presence of an immobilized metal complex catalyst of Formula I,
Specification