Abstract: The present invention relates to a compound of formula (I), wherein R1 is hydrogen, lower alkyl, lower alkyl substituted by halogen, halogen, lower alkoxy or lower alkoxy substituted by halogen; R may be the same or different, if n=2 or 3; n is 1, 2 or 3; m is 1, 2 or 3; Ar is a five or six membered heteroaryl group, selected from (II), (III), (IV) or (V) wherein R2 is hydrogen, lower alkyl, lower alkyl substituted by halogen, halogen or lower alkoxy; R3 is hydrogen or halogen; -( ) m - is —(CH2)m— or to pharmaceutically active acid addition salts thereof. The compounds may be used for the treatment of Alzheimer's disease, cerebral amyloid angiopathy, hereditary cerebral hemorrhage with amyloidosis, Dutch-type (HCHWA-D), multi-in-farct dementia, dementia pugilistica or Down syndrome.

Abstract: The present invention relates to a compound of formula I, 1-1 or 1-2 wherein R1 is hydrogen, lower alkyl, lower alkyl substituted by halogen, halogen, lower alkoxy, or lower alkoxy substituted by halogen; R1 may be different if n=2 or 3 n is 1, 2 or 3 Ar is a six membered heteroaryl group, selected from wherein R2 is hydrogen, lower alkyl, lower alkyl substituted by halogen, halogen or lower alkoxy; R3 is hydrogen or halogen; or to a pharmaceutically active acid addition salt thereof. The compounds may be used for the treatment of Alzheimer's disease, cerebral amyloid angiopathy, hereditary cerebral hemorrhage with amyloidosis, Dutch-type (HCHWA-D), multi-infarct dementia, dementia pugilistica or Down syndrome.

Abstract: The present invention relates to a compound of formula (I), wherein R1 is hydrogen, lower alkyl, lower alkyl substituted by halogen, halogen, lower alkoxy or lower alkoxy substituted by halogen; and R1 may be different if n is 2 or 3; R2 is hydrogen, lower alkyl, lower alkyl substituted by halogen, halogen, CN, lower alkoxy or lower alkoxy substituted by halogen; X is CH or N; m is 1, 2 or 3; -( )m is —(CH2)m—; n is 1, 2 or 3; Ar is a five membered heteroaryl group, selected from formula (A), (B), (C), (D), (E) or (F), wherein R3 is hydrogen, methyl or chloro; R4 is hydrogen or methyl; R5 is F, Cl, CHF2 or CF3; or to pharmaceutically active acid addition salts thereof. The compounds may be used for the treatment of Alzheimer's disease, cerebral amyloid angiopathy, hereditary cerebral hemorrhage with amyloidosis, Dutch-type (HCHWA-D), multi-infarct dementia, dementia pugilistica or Down syndrome.