Lewis acid-catalysed one pot synthesis of substituted xanthenes |
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Authors: | Böss Esther Hillringhaus Tim Nitsch Jacqueline Klussmann Martin |
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Institution: | Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany. |
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Abstract: | A direct synthesis of substituted xanthenes from salicylaldehydes and cyclohexenones or tetralones has been developed. The reaction is catalysed by Lewis acids like scandium triflate and furnishes substituted xanthenes in good to excellent yields using either microwave or thermal heating. Microwave heating results in significantly shortened reaction times of 30 min and generally higher yields. |
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