Lactones and ketal-lactones prepared from AlCl3-catalyzed reactions of cycloalkenedicarboxylic anhydrides with toluene

József A. Szabó, P. Sohár, Zsolt Böcskei, G. Stájer, G. Bernáth

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

By means of the AlCl3-catalyzed reactions of (bi)cycloalkene dianhydrides with toluene, lactones and tricyclic or tetracyclic ketal- lactones were prepared. The nature of the products obtained depends greatly on the solvent, the molar ratio and sequence of addition of the reactants, and the temperature. For the ketal-lactone, AlCl3 promotes the formation of the cyclotautomer of the γ-ketocarboxylic acid intermediate, and the α- hydroxylactone then adds to the unsaturated carbon bond. The endo-aroyl group of the norbornane lactone can readily be transformed to an exo-group at elevated temperature. The structures were established by NMR and X-ray measurements.

Original languageEnglish
Pages (from-to)1564-1568
Number of pages5
JournalSynthesis
Issue number9
Publication statusPublished - 1999

Fingerprint

Anhydrides
Toluene
Lactones
Norbornanes
Cycloparaffins
Nuclear magnetic resonance
X rays
Temperature
Carbon
Acids
aluminum chloride

Keywords

  • AlCl-catalyzed reactions
  • Arachno-structure compounds
  • Ketal-lactones
  • Lactones

ASJC Scopus subject areas

  • Organic Chemistry

Cite this

Lactones and ketal-lactones prepared from AlCl3-catalyzed reactions of cycloalkenedicarboxylic anhydrides with toluene. / Szabó, József A.; Sohár, P.; Böcskei, Zsolt; Stájer, G.; Bernáth, G.

In: Synthesis, No. 9, 1999, p. 1564-1568.

Research output: Contribution to journalArticle

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AU - Szabó, József A.

AU - Sohár, P.

AU - Böcskei, Zsolt

AU - Stájer, G.

AU - Bernáth, G.

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