Isoflavone → 3-Phenyl-2,3-dihydro-4H-1-benzopyran-4-one

Participants

Reaction Steps

Isoflavone (3.00 g) was dissolved in acetic acid (100 ml), and the solution hydrogenated at 50°-60° and 10.4-13.8 atm using 10% w/v palladium or carbon catalyst. The solution was filtered and evaporated, and the residue chromatographed on alumina, eluting with toluene. The product thus obtained gave, on recrystallisation from petroleum ether, (60°-80°) isoflavanone, 0.90 g., m.pt 73°-76°.

Provenance & Evidence