Water → HCID 58423836, compound

Participants

Reaction Steps

A solution of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (64.2 g, 0.3 mol), 1-phenyl-ethanone (46.8 g, 0.39 mol) and pyrrolidine (6 g, 0.084 mol) in toluene (125 mL) was stirred vigorously at room temperature overnight. Then the mixture was refluxed for 6 h. After cooling, the mixture was treated with water (100 mL) and extracted with ethyl acetate (200 mL*3). The combined organic layers were concentrated and the residue was purified by column to give 6-bromo-2-methyl-2-phenyl-chroman-4-one (23.7 g, 25%). 1H-NMR (CDCl3): 1.74 (s, 3H), 3.06 (d, 1H), 3.31 (d, 1H), 6.95 (d, 1H), 7.20-7.37 (m, 5H), 7.52 (d, 1H), 7.84 (s, 1H).

Provenance & Evidence