Psoralen → 4',5'-Dihydropsoralen

Participants

Reaction Steps

A solution was prepared of 1.86 g (0.010 moles) of psoralen (7H-furo[3,2-g][1]benzopyran-7-one) in 200 ml of 95% ethanol, heated to reflux and treated by the addition of 5.0 ml of cyclohexene and a slurry of 5.0 g of 10% palladium on carbon in 30 ml of 95% ethanol. After 30 minutes of reflux with magnetic stirring the medium was filtered, evaporated in vacuo and the residue was recrystallized from 95% ethanol to give 1.36 g (72% yield) of tiny white needles, mp 198°-200° C.

Provenance & Evidence