4.7 Article

Succinimide-N-sulfonic acid: An efficient catalyst for the synthesis of xanthene derivatives under solvent-free conditions

Journal

DYES AND PIGMENTS
Volume 95, Issue 3, Pages 789-794

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2012.06.022

Keywords

Succinimide-N-sulfonic acid; Multicomponent reactions; Xanthene derivatives; Solvent-free conditions; 2-Naphthol; Aldehydes

Funding

  1. Guilan University Research Council

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A mild, simple and convenient procedure for the synthesis of xanthene derivatives is described via three component condensation of aldehydes with 2-naphthol, 1,3-cyclohexanedione and/or a mixture of 2-naphthol and 1,3-cyclohexanediones using succinimide-N-sulfonic acid as an efficient, cheap and readily synthesis catalyst under solvent-free conditions. The structures of the products were characterized by their physical constants, comparison with authentic samples and IR, H-1 NMR and C-13 NMR spectroscopy. The present methodology offers several advantages such as high yields, simple procedure, low cost, short reaction times, solvent-free and mild reaction conditions and use of a reusable catalyst. (C) 2012 Elsevier Ltd. All rights reserved.

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