A fast, green, and efficient method for synthesis of tetrahydrobenzo[a]xanthene-11-ones by one-pot, three-component reaction of β-naphthol, aromatic aldehydes, and dimedone, using cerium(IV) sulfate tetrahydrate, Ce(SO4)2·4H2O, as an effective and novel inorganic solid acid catalyst under neat conditions is described. The catalyst is inexpensive and readily available and can be recovered conveniently and reused efficiently such that substantial catalytic activity still remains after the fifth run. Other advantages of this procedure are high yields, short reaction times, easy work-up, and absence of any volatile and hazardous organic solvents.
Research on Chemical Intermediates – Springer Journals
Published: Aug 14, 2013
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