The invention relates to compounds of the general formula
in which R
1
, R
2
, R3, R
4
, R
2′
, R3′, R
4′
, R
5
, and X is —CHR— are as defined in the specification. The invention also provides pharmaceutically acceptable acid addition salts, optically pure enantiomers, racemates and diastereomeric mixtures of such compounds. The invention further provides methods for the treatment of Alzheimer's disease or common cancers.
The invention relates to compounds of the general formula (I), wherein R1-R5 and R2’-R4’ are as described in the claims and to pharmaceutically suitable acid additon salts, optical pure enantiomers, racemates or diastereomeric mixtures thereof for the treatment of Alzheimer’s disease or common cancers.