The present invention provides, inter alia, compounds of Formula (I) and pharmaceutically acceptable salts thereof, to processes for the preparation of, intermediates used in the preparation of, and compositions containing such compounds and the uses of such compounds as a method for the treatment of a disease or condition selected from the group consisting of central nervous system disorders, cognitive disorders, schizophrenia, dementia and other disorders in a mammal. The present invention further provides compounds of Formula (Id) and pharmaceutically acceptable salts thereof as CYP3A4 selective inhibitors.