Citation: Gholam Hossein Mahdavinia, Mohammad A. Bigdeli, Yaser Saeidi Hayeniaz. Covalently anchored sulfonic acid on silica gel (SiO₂-R-SO₃H) as an efficient and reusable heterogeneous catalyst for the one-pot synthesis of 1,8-dioxo-octahydroxanthenes under solvent-free conditions[J]. Chinese Chemical Letters, ;2009, 20(5): 539-541. doi: 10.1016/j.cclet.2008.12.026 shu

Covalently anchored sulfonic acid on silica gel (SiO₂-R-SO₃H) as an efficient and reusable heterogeneous catalyst for the one-pot synthesis of 1,8-dioxo-octahydroxanthenes under solvent-free conditions

a Department of Chemistry, Islamic Azad University-Marvdasht Branch, Marvdasht, Iran;
b Faculty of Chemistry, Tarbiat Moalem University, 49 Mofateh Street, Tehran, Iran

Received Date: 13 October 2008

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 (SiO₂-R-SO₃H) is completely heterogeneous and can be recycled.
- 1,8-Dioxooctahydroxanthenes,
- Heterogeneous catalysis,
- SiO₂-R-SO₃H,
- Reusable
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