24.24The driving force for this reaction is the stabilization that results from formation of the aromaticring. A reasonable series of steps begins with protonation of the carbonyl oxygen.24.25Bromination ofp-hydroxybenzoic acid takes place in the normal fashion at both positions ortho tothe hydroxy group.A third bromination step, this time at the para position, leads to the intermediate shown.Aromatization of this intermediate occurs by decarboxylation.
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