Halo acetates carboxyl group reactions

With careful choice of reagent and reaction conditions, alkenes containing other functionalities can be selectively hydroxylated without complicating side reactions. For example, the oxidation may be carried out in the presence of ester, ether, sulfide, carboxylic acid, acetal, carixxiyl, halo, alcohol and aryl groups. Regioselective hydroxylation is also possible in dienes in which one center is electron poor, and some selectivity is also found between isolat double bonds. For example, syn hydroxylatitm of diene... 

All types of alcohols and phenols are acylated by anhydrides. The reaction is catalyzed by a small amount of sulfuric acid, zinc chloride, acetyl chloride, sodium acetate, or pyridine. r-Butyl alcohol gives /-butyl acetate in 60% yield. Acetylation of phenols may be accomplished in an aqueous alkaline solution, the acylation proceeding more rapidly than the hydrolysis of the anhydride. The yields are above SX)%. Phenol, dihydroxybenzenes, naphthols, and phenols carrying nitro, amino, halo, carboxyl, or carbomethoxyl groups are acetylated by this procedure. ... 

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