Compounds having the formula (1) pharmaceutical compositions containing them and their methods of use for the treatment of neurological disorders related to amyloid B protein production and neurological disorders such as Alzheimer's disease. These compounds inhibit γ secretase and thereby inhibit the production of amyloid β protein, thereby acting to prevent the formation of neurological deposits of amyloid protein.
The invention provides a new method for treating disorders associated with activation of the Notch signal transduction pathway comprising administering an effective amount of a compound of Formula (I), in free form or in a pharmaceutically acceptable salt form or in the form of a pharmaceutically acceptable solvate of the compound or the salt, to a human or animal patient in need thereof.