Methods for treating attention-deficit/hyperactivity disorder

A method of treating ADHD, comprising the administration of a therapeutically effective amount of a compound having structural Formula (1) or a pharmaceutically acceptable salt thereof, to a mammal in need of treatment:

• wherein
• R is selected from the group consisting of hydrogen, lower alkyl of 1 to 8 carbon atoms, halogen selected from F, Cl, Br and I, alkoxy containing 1 to 3 carbon atoms, nitro group, hydroxy, trifluoromethyl, and thioalkoxy containing 1 to 3 carbon atoms;
• x is an integer of 1 to 3, with the proviso that R may be the same or different when x is 2 or 3;
• R1 and R2 can be the same or different from each other and are independently selected from the group consisting of hydrogen, lower alkyl of 1 to 8 carbon atoms, aryl, arylalkyl, cycloalkyl of 3 to 7 carbon atoms;
• R1 and R2 can be joined to form a 5 to 7-membered heterocycle substituted with a member selected from the group consisting of hydrogen, alkyl, and aryl groups, wherein the heterocyclic compound comprises 1 to 2 nitrogen atoms and 0 to 1 oxygen atom, wherein the nitrogen atoms are not directly connected with each other or with the oxygen atom.