Covalently anchored sulfonic acid on silica gel (SiO 2-R-SO 3H) as an efficient and reusable heterogeneous catalyst for the one-pot synthesis of 1,8-dioxo-octahydroxanthenes under solvent-free conditions

A highly efficient one-pot synthesis of 1,8-dioxooctahydroxanthenes under solvent-free conditions catalyzed by sulfonic acid covalently anchored onto the surface of silica gel is reported. All types of aldehydes, including aromatic, unsaturated, and heterocyclic, are used. The silica gel/sulfonic ac...

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Bibliographic Details
Published in:Chinese chemical letters 2009-05, Vol.20 (5), p.539-541
Main Authors: Mahdavinia, Gholam Hossein, Bigdeli, Mohammad A., Hayeniaz, Yaser Saeidi
Format: Article
Language:English
Subjects:
1,8-Dioxooctahydroxanthenes
Heterogeneous catalysis
Reusable
SiO 2-R-SO 3H
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Summary:A highly efficient one-pot synthesis of 1,8-dioxooctahydroxanthenes under solvent-free conditions catalyzed by sulfonic acid covalently anchored onto the surface of silica gel is reported. All types of aldehydes, including aromatic, unsaturated, and heterocyclic, are used. The silica gel/sulfonic acid catalyst (SiO 2-R-SO 3H) is completely heterogeneous and can be recycled.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2008.12.026