Water → HCID 19351605, compound

Participants

Reaction Steps

Butyl bromide (0.05 ml) was added with stirring to a mixture of a solution of 6-bromo-4-hydroxy-3-phenyl-2H-1-benzopyran-2-one (80 mg) (Synthesis 1993, 99), in dry dimethylformamide (0.5 ml) and potassium carbonate (70 mg). The mixture was stirred for 48 hours and water (5 ml) was added. The mixture was extracted with diethyl ether and the extract washed with water, dried and evaporated under reduced pressure. The residue was washed with water and dried to give 6-bromo-4-butoxy-3-phenyl-2H-1-benzopyran-2-one, m.p. 87-9° C. (compound 29)

Provenance & Evidence