The present invention provides compounds of Formula I useful as BACE inhibitors in the treatment of e.g. Alzheimer's disease: wherein A is selected from the group consisting of; of; R
1
is H or F; R
2
is H, —OCH
3
, C1-C3 alkyl; R
3
is H, —CH
3
, or —OCH
3
; and R
4
is H or F; or a pharmaceutically acceptable salt thereof.
本发明提供了一种公式I的化合物,其在治疗例如阿尔茨海默病中作为
BACE
抑制剂具有用途:其中A从以下组中选择;R1为H或F;R2为H,-O ,C1-C3烷基;R3为H,-
CH3或-O ;且R4为H或F;或其药学上可接受的盐。