| 摘要 |
The present invention relates to a compounds of formula I wherein R1, R1′, R2, R3, R4, X, Ar, and m are as defined in the specification and claims and pharmaceutically active acid addition salts thereof. Compounds of the invention have Asp2 (β-secretase, BACE 1 or Memapsin-2) inhibitory activity and are useful for the treatment of diseases characterized by elevatedβ-amyloid levels orβ-amyloid deposits, particularly Alzheimer's disease. |
