Condensed heterocyclic compound

摘要

The present invention provides a compound having a superior PDE10A inhibitory action and use thereof. The compound is a compound represented by the following formula (I):;
wherein each symbol is as defined in the present specification, or a salt thereof.

主权项

1. A compound represented by the formula (I-i): wherein R1 is a hydrogen atom or an optionally substituted C1-6 alkyl group, X1 is CH or a nitrogen atom, ring A optionally has a substituent, X2 is CR2 or a nitrogen atom, X3 is CR3 or a nitrogen atom, X4 is CR4 or a nitrogen atom, X5 is CR5 or a nitrogen atom, R2, R3, R4 and R5 are each independently a hydrogen atom or a substituent, ring B is an optionally substituted 5- or 6-membered nitrogen-containing heterocycle (said nitrogen-containing heterocycle optionally further forms a fused ring with a ring other than ring C1), Z5 is ═N— or —N═, ring C1 is an optionally substituted 5-membered ring, Z1, Z3′ and Z4′ are each independently a ring C1-constituting atom selected from a carbon atom and a nitrogen atom, ring D is an optionally substituted 5- or 6-membered ring, and is a single bond or a double bond, or a salt thereof.