2,6-diketone-piperazine (piperidine) type derivative and application thereof

The invention discloses a 2,6-diketone-piperazine (piperidine) type derivative and an application thereof. The derivative can be applied to preparation of medicines for preventing or treating central nervous system diseases. Animal experiment results show that the derivative has smaller ED50 and stronger action in MK-801-induced high activity and apomorphine-induced climbing animal models as well as has larger ED50 and larger therapeutic indexes in an animal catalepsy model. The derivative is a compound or salt thereof with a general formula (I).