Hoffmann-la Roche Inc.

F. Hoffmann-la Roche Ag

Stefan Berchtold

Hasane Ratni

Werner Neidhart

Roland Jakob-Roetne

Guido Galley

Anja Limberg

Rosa Maria Rodriguez Sarmiento

Bjoern Bartels

Annick Goergler

Michael Reutlinger

Christian Schnider

Daniela Krummenacher

Roland Jakob-roetne

The present invention relates to a compound of formula I, HetAr is a five or six membered heteroaryl group, selected from wherein Ris hydrogen, halogen, lower alkyl, lower alkoxy or lower alkyl substituted by halogen, and may be the same or different, if two Roccur; Ris lower alkyl or a mono- or polydeutered derivative thereof, lower alkyl substituted by halogen or lower alkoxy, lower alkenyl unsubstituted or substituted by halogen, cycloalkyl or CH-cycloalkyl unsubstituted or substituted by halogen, heterocycloalkyl or CH-heterocycloalkyl unsubstituted or substituted by lower alkyl; Ris halogen, lower alkyl, lower alkyl substituted by halogen, lower alkoxy substituted by halogen or S(O)-lower alkyl; n is 1, 2 or 3; if n is &#x3e;1, then Rmay be the same or different; or to a pharmaceutically active acid addition salt thereof, to a racemic mixture or to its corresponding enantiomer and/or an optical isomer and/or stereoisomer 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. 

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Basel, Switzerland

Stefan Berchtold