| abstract |
The present invention provides a cyclic aminomethyl pyrimidine derivative and a pharmaceutically acceptable salt thereof with high selectivity for dopamine D 4 receptors, which are useful for treating a disease such as attention deficit hyperactivity disorder. Specifically, a compound of formula (1) or a pharmaceutically acceptable salt thereof is provided, wherein n and m are independently 1 or 2; R a is C 1-6 alkyl group, C 3-6 cycloalkyl group, or amino group; R b is hydrogen atom, C 1-6 alkyl group or the like, provided that when R a is amino group, then R b is hydrogen atom; R c1 and R c2 are independently hydrogen atom, or C 1-6 alkyl group; R d1 and R d2 are independently hydrogen atom, fluorine atom or the like; ring Q is an optionally-substituted pyridyl group or an optionally-substituted isoquinolyl group; and the bond having a dashed line is a single or double bond. |