Heterogeneous catalysis for the acetylation of benzo crown ethers

Heterogeneous catalytic acetylation of benzo-15-crown-5 was investigated using solid Lewis acids consisting of sulfated zirconia calcined at 625°C or K10 exchanged by Cu, Zn, Fe or Sn ions and treated at 250°C. The nature of the transition metal ions introduced in the mesoporous clay plays an import...

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Veröffentlicht in:	Journal of molecular catalysis. A, Chemical Chemical, 2000, Vol.151 (1), p.179-184
Hauptverfasser:	Biró, K., Békássy, S., Ágai, B., Figueras, F.
Format:	Artikel
Sprache:	eng
Schlagworte:	Acetyl chloride Acetylation of crown ethers Catalysis Catalytic reactions Chemical Sciences Chemistry Exact sciences and technology Exchanged clays General and physical chemistry Solid acids Sulfated zirconia Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Zusammenfassung:	Heterogeneous catalytic acetylation of benzo-15-crown-5 was investigated using solid Lewis acids consisting of sulfated zirconia calcined at 625°C or K10 exchanged by Cu, Zn, Fe or Sn ions and treated at 250°C. The nature of the transition metal ions introduced in the mesoporous clay plays an important role in the activity of the catalysts. Sn-exchanged K10 shows the best catalytic properties and could suit for practical preparative purposes. 4′-Acetyl-benzo-15-crown-5 was produced with 90% yield under optimal conditions.
ISSN:	1381-1169 1873-314X
DOI:	10.1016/S1381-1169(99)00238-1