ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Ferric hydrogensulphate as a recyclable catalyst for the synthesis of fluorescein derivatives

Hossein Eshghi and Narges Mirzaie

Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, 91775-1436 Iran

E-mail: heshghi@ferdowsi.um.ac.ir

Abstract: Polycondensation reactions of phenols with phthalic anhydride were carried out in the presence of ferric hydrogensulphate under melt conditions. The reactions proceeded in short reaction times by using a catalytic amount of Fe(HSO₄)₃ and the corresponding fluorescein derivatives were obtained in high yields. The simplicity, scale-up, along with the use of an inexpensive, non-toxic, recyclable catalyst of an environmentally benign nature, are other remarkable features of the procedure. The absorption and emission properties of these fluorescein derivatives were studied.

Keywords: fluorescein – ferric hydrogensulphate – eosin – rhodamines

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-011-0024-3

Chemical Papers 65 (4) 504–509 (2011)