Dibenzylidene acetone → 1,5-Diphenylpentan-3-one

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Reaction Steps

A solution of 1,5-diphenyl-1,4-pentadien-3-one (50.9 g, 0.217 mole) in dry tetrahydrofuran (350 ml) was hydrogenated over 5% palladium on carbon (5.6 g) at room temperature under an atmosphere of hydrogen. After reduction, catalyst was filtered off, the filtrate was concentrated and the residue was distilled under reduced pressure to give 25.5 g of the title compound as a pale yellow oil having a boiling point of 160°-162° C./0.4 mmHg.

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