Enantiodifferentiation in asymmetric sonochemical hydrogenations

Research output: Contribution to journalArticle

107 Citations (Scopus)

Abstract

The effect of sonochemical pretreatment on the enantioselectivity of Pt/Al2O3-cinchonidine-catalyzed ethyl pyruvate hydrogenation was studied at different hydrogen pressures in various solvents, mainly in acetic acid. The sonochemical pretreatment of a commercial Pt/Al2O3-cinchonidine catalytic system in acetic acid resulted in enhanced enantioselectivity providing excellent ee values (97 % ee ) under mild and widely varied experimental conditions. Moreover, the application of ultrasonics provides a possibility of the catalyst recycling without regeneration. The catalyst was tested by transmission electron microscopy to determine the effect of the sonication on the metal particle size morphology.

Original languageEnglish
Pages (from-to)81-84
Number of pages4
JournalCatalysis Letters
Volume52
Issue number3-4
Publication statusPublished - 1998

Fingerprint

Enantioselectivity
acetic acid
Acetic acid
Acetic Acid
pretreatment
Hydrogenation
hydrogenation
pyruvates
catalysts
Catalysts
Sonication
metal particles
recycling
regeneration
Recycling
Hydrogen
ultrasonics
Ultrasonics
Metals
Particle size

Keywords

  • Cinchonidine
  • Enantioselective
  • Ethyl pyruvate
  • Hydrogenation
  • Particle size distribution
  • Pt/AlO
  • Ultrasounds

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

Cite this

Enantiodifferentiation in asymmetric sonochemical hydrogenations. / Török, Béla; Felföldi, K.; Szakonyi, G.; Balázsik, K.; Bartók, M.

In: Catalysis Letters, Vol. 52, No. 3-4, 1998, p. 81-84.

Research output: Contribution to journalArticle

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AU - Bartók, M.

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