CeCl3·7H2O-Catalyzed Synthesis of 1-Oxo-hexahydroxanthene Derivatives in Aqueous Media
摘要:
Cerium(III) chloride heptahydrate (CeCl(3)center dot 7H(2)O) catalyzes the reaction of substituted salicylaldehydes with 1,3-cyclohexane dione or dimedone in aqueous medium at reflux temperature to afford the corresponding 1-oxo-1,2,3,4,9,10-hexahydroxanthene derivatives4 0 in high yields.