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Triethylammonium hydrogen sulfate ionic liquid accelerated one-pot synthesis of 1,8-dioxo-octahydroxanthenes

Ladan Baziyar, Zahed Karimi-Jaberi

The one-pot reaction of aldehydes and dimedone afford 1,8-dioxo-octahydroxanthene derivatives in the presence of triethylammonium hydrogen sulfate ionic liquid [Et3NH][HSO4]. Simplicity of the reaction, high yields of the products, short reaction times, easy work-up, ease of the preparation of the catalyst and environmentally benign re-action conditions are themost significant advantages of this method which make this procedure a useful addition to the available methods