[Problem] To provide a pharmaceutical, particularly a compound which can be used as an insulin secretion promoter or a preventive or therapeutic agent for diabetes mellitus and the like diseases in which GPR40 is concerned.
[Means for resolution] It was found that novel carboxylic acid derivatives or salts thereof, characterized in that carboxylic acid is linked to a 6-membered monocyclic aromatic ring via two atoms and said aromatic ring is linked to a nitrogen-containing bicyclic ring via a linker, have excellent GPR40 receptor agonist action. In addition, since the carboxylic acid derivatives of the invention showed excellent insulin secretion promoting action and blood glucose reducing action, they are useful as an insulin secretion promoter and a preventive or therapeutic agent for diabetes mellitus.
To provide a compound which is usable as a drug, in particular, an insulin secretagogue or a preventive or remedy for a disease in which GPR40 participates such as diabetes or the like. [MEANS FOR SOLVING PROBLEMS] If is found out that a novel carboxylic acid derivative, which is characterized in that a carboxylic acid is bonded via two atoms to a 6-membered monocyclic aromatic ring and this aromatic ring is further bonded via a linker to a nitrogen-containing bicyclic ring, or its salt has an excellent GPR40 agonist activity, Because of showing excellent effects of promoting insulin secretion and lowering blood glucose level, this carboxylic acid derivative is useful as an insulin secretagogue or a preventive or remedy for diabetes.