期刊
CHINESE CHEMICAL LETTERS
卷 20, 期 5, 页码 539-541出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2008.12.026
关键词
1,8-Dioxooctahydroxanthenes; Heterogeneous catalysis; SiO2-R-SO3H; Reusable
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. (C) 2008 Mohammad A. Bigdeli. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
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