Methylparaben → HCID 21997456, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 4-hydroxybenzoic acid methyl ester (100 g) and 1,6-dibromohexane (481 g) in N,N-dimethylformamide (500 ml) was treated with potassium carbonate (109 g) then heated at 60° C. for 2 hours. After cooling, the mixture was diluted with ethyl acetate (3 L) and washed with water (7×1 L). The organic layer was dried over magnesium sulfate, filtered, and evaporated to give a crude oil. Hexane (˜100 ml) was added and the resulting precipitate removed by filtration and discarded and the filtrate loaded onto a silica gel column (2 kg). Elution with hexane, followed by 9:1 hexane-ethyl acetate and 8:1 hexane-ethyl acetate afforded methyl 4-(6-bromo-n-hexyloxy)benzoate (186 g) as a white solid.

Provenance & Evidence