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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Hydrocarboxylation of 1-(4-isobutylphenyl) ethanol catalyzed by heterogeneous palladium catalysts

Cited 10 times inthomson ciCited 12 times inthomson ci
Title
Hydrocarboxylation of 1-(4-isobutylphenyl) ethanol catalyzed by heterogeneous palladium catalysts
Other Titles
Hydrocarboxylation of 1-(4-isobutylphenyl) ethanol catalyzed by heterogeneous palladium catalysts
Author
Jang, Eun JooLee, Kyung HeeLee, Jae SungKim, Young Gul
Keywords
PHOSPHINATED MONTMORILLONITE; 1ST EXAMPLE; COMPLEXES; OLEFINS; HYDROESTERIFICATION; 4-METHYLSTYRENE; STYRENE
Issue Date
1999-08
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, v.144, no.3, pp.431 - 440
Abstract
Heterogeneous palladium catalysts were employed for the synthesis of 2-(4-isobutylphenyl) propionic acid (ibuprofen) by carbonylating 1-(4-isobutylphenyl) ethanol (IBPE) with carbon monoxide and water, Among the supported palladium catalysts tested, palladium anchored on montmorillonite showed good activity for the carbonylation and good selectivity to ibuprofen. For the palladium/montmorillonite catalyst, the presence of triphenylphosphine and hydrogen chloride in the reaction solution was essential for its catalytic activity even if triphenylphosphine and chloride ion had already been coordinated to the palladium precursor. The effects of reaction variables on the heterogeneous carbonylation have been investigated for the regiospecific synthesis of ibuprofen, and it was revealed that the palladium/montmorillonite showed better selectivity to ibuprofen than the homogeneous counterpart. This heterogeneous catalyst recovered by filtration after a batch of the reaction showed activity similar to that of the fresh catalyst for a new batch of reaction. Furthermore, the filtrate without the solid catalyst did not show any carbonylation activity. These implied that dissolution of palladium component from the solid catalyst had not been serious. (C) 1999 Elsevier Science B.V. All rights reserved
URI
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DOI
10.1016/S1381-1169(99)00044-8
ISSN
1381-1169
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ECHE_Journal Papers
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