Hydrogen Bromide → HCID 21329824, compound

Participants

Reaction Steps

A mixture of 30 grams of 4-allyl-3-hydroxy-5-methoxybenzoic acid, 150 cc of glacial acetic acid and 45 cc of 48%HBr is heated to the reflux temperature for 8 hours. After this time the reaction mixture is concentrated to dryness and the obtained residue, ground with water and filtered is crystallized from ethyl ether-petroleum ether. The product is obtained in a yield of 19.9 grams (71 percent of theoretical) and has a melting point of 181°-184° C.

Provenance & Evidence