The acid hydrolysis of some polyhalotropones and some reactions of the products were investigated. The treatment of 2, 5-dichlorotropone with hydrochloric or sulfuric acid afforded 2-chloro-5-hydroxytropone (I) and a small amount of 5-chlorotropolone. The compound I gives only one kind of the methyl ether and one kind of the acetyl or benzoyl derivative. From the methyl ether, 5-amino-and 5-methylamino-2-chlorotropone were derived. The ...