4-Hydroxybenzoic Acid → HCID 18435337, compound

Participants

Reaction Conditions

Reaction Steps

4-hydroxybenzoic acid (13.8 g, 0.1 mole) was dissolved in methanol and to this solution was added, sodium methoxide (10.8 g, 0.2 mole). The solution was then evaporated to dryness. To the resulting solid was added DMF (500 mL) followed by 4-fluoro-2-methyl-1-nitrobenzene (available from Aldrich under 5-fluoro-2-nitro-toluene) (10.2 mL 0.1 mole). The mixture was heated at 125° C. for 2 hours, cooled and poured into 3 L of water, acidified to pH2 with 2M HCl and extracted twice with ethyl acetate. The combined organic layers were washed with water, dried and evaporated to dryness. The resulting solid was triturated with ether to give 4-(3-methyl-4-nitro-phenoxy)-benzoic acid (compound 1) as a white solid 6.1 g (22% yield; melting point=187-190° C.).

Provenance & Evidence