Provided is a tricyclic compound having a PPAR γ agonist activity, which is represented by the general formula (I) wherein Z represents a single bond or the like, Y represents a hydrogen atom, lower alkyl optionally having substituent(s) or the like, X represents a hydrogen atom or the like, A represents aryl or the like, B and C are the same or different and each represents an aromatic carbocycle or the like, R
4
-R
9
are the same or different and each represents hydrogen or the like, V represents a single bond or the like, R
10
and R
11
are the same or different and each represents hydrogen or the like, or a pharmaceutically acceptable salt thereof or the like:
efficient copper-catalyzedsynthesis of (annelated) benzimidazoles is reported. This transformation is based on a simple and straightforward one-pot sequence involving a copper-catalyzed cross coupling between o-haloanilines and lactams/amides followed by a subsequent cyclization under acidic conditions. A variety of (annelated) benzimidazoles could be easily obtained in high yields from readily available