Revue des Sciences Fondamentales Appliquées
Volume 8, Numéro 3, Pages 826-838
2016-09-01

A Convenient Synthesis Of Pyrandione Derivatives Using P-toluenesulfonic Acid As Catalyst Under Ultrasound Irradiation



Auteurs : Benosmane N. . Boutemeur B. . Hamdi S.m. . Hamdi M. .

Résumé

A new series of 3,3'-{alkane-α,ω-diylbis[imino-eth-1-yl-1-ylidene]}bis(6-methyl-2H-pyran- 2,4(3H)-dione) derivatives (3c-e) has been synthesized by the convenient ultrasound-mediated condensation of a diamine with dehydroacetic acid in the presence of a catalytic amount of p- toluenesulfonic acid. The structure of all synthesized compounds was elucidated by IR spectroscopy, 1H NMR spectroscopic spectra, elemental analysis, and mass spectroscopy. A tautomeric form for the derivatives species is also proposed.

Mots clés

Dehydroacetic acid; Schiff base; Condensation; Catalyst; Ultrasound irradiation; Tautomerism.

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