Abstract: The present invention relates to spiroheterocycl-dihydropyrimidines, their use as modulators of ?-secretase and to pharmaceutical compositions containing said compounds. In particular, the present invention relates to compounds which interfere with ?-secretase and/or its substrate and therefore modulate the formation of A? peptides.

Abstract: The present invention relates to substituted amino-quinazolinones of general formula (I) wherein the groups R1 to R14 and A, are defined as in the specification and claims and the use thereof for the treatment of Alzheimer's disease (AD) and similar diseases.

Abstract: The invention relates to novel 6-Cycloalkyl-pyrazolopyrimidinones according to formula (I). wherein R1 is a 5 or 6 membered aromatic heteroaryl-group, R2 is an optional substituent, D is optionally substituted cyclopentyl, cyclohexyl, tetrahydrofuranyl, tetrahydropyranyl or 2-, 3- or 4-pyridyl, m=1 or 2 and n is 0, 1 or 2. The new compounds are for use as the active entity of medicaments or for the manufacture of medicaments respectively, in particular medicaments for the treatment of conditions concerning deficits in perception, concentration, learning or memory. Such conditions may for example be associated with Alzheimer's disease, schizophrenia and other diseases. The new compounds are also for example for the manufacture of medicaments and/or for use in the treatment of these diseases, in particular for cognitive impairment associated with such disease. The compounds of the invention show PDE9 inhibiting properties.

Abstract: The present invention relates to substituted amino-quinazolinones of general formula (I) wherein the groups R1 to R14 and A, are defined as in the specification and claims and the use thereof for the treatment of Alzheimer's disease (AD) and similar diseases.

Abstract: The invention relates to novel cycloalkyl- or cycloalkenyl-substituted pyrazolopyrimidinones of formula (I), wherein ? is selected from the group A1 consisting of a C3-C8-cycloalkyl group or a C4-C8-cycloalkenyl group, whereby the members of C3-C8-cycloalkyl group being selected from the group of cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptanyl and cyclooctanyl; and the members of the C4-C8-cycloalkenyl group, being selected from cyclobutenyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, cyclooctenyl, cyclopentadienyl, cyclohexadienyl, cycloheptadienyl, cyclooctadienyl, cycloheptatrienyl, cyclooctathenyl, cyclooctatetraenyl. The new compounds shall be used for the manufacture of medicaments, in particular medicaments for improving perception, concentration, learning and/or memory in patients in need thereof.

Abstract: The invention relates to novel pyrazolopyrimidinones according to formula (I). The new compounds shall be used for the manufacture of medicaments, in particular medicaments for the treatment of conditions concerning deficits in perception, concentration, learning or memory. The new compounds are also for the manufacture of medicaments for the treatment of Alzheimer's disease. Further aspects of the present invention refer to a process for the manufacture of the compounds and their use for producing medicaments.

Abstract: The invention relates to novel 1,6-disubstituted pyrazolopyrimidinones, Formula (I) with is a mono-, bi- or tri-cyclic heterocyclyl group, the ring members of which are carbon atoms and at least 1, preferably 1, 2 or 3, heteroatom(s), which are selected from the group of nitrogen, oxygen and sulphur, which is in the form of —S(O)r— with r being 0, 1 or 2, and—said heterocyclyl group is or comprises 1 non-aromatic, saturated, or partly unsaturated monocyclic ring which comprises at least 1 heteroatom as ring member and—said heterocyclyl group is bound to the scaffold by said 1 non-aromatic, saturated, or partly unsaturated monocyclic ring which comprises at least 1 heteroatom as ring member. According to one aspect of the invention the new compounds are for the manufacture of medicaments, in particular medicaments for the treatment of conditions concerning deficits in perception, concentration, learning or memory.

Abstract: The invention relates to novel 1,6-disubstituted pyrazolopyrimidinones of formula (I), in which Hc is a tetrahydropyranyl-group and R1 is the group V—W?*, whereby V and W independently of each other may be an aryl group or an heteroaryl group, which independently of each other may optionally be substituted. According to one aspect of the invention the new compounds are for use as medicaments or for the manufacture of medicaments, in particular medicaments for the treatment of conditions concerning deficits in perception, concentration, learning or memory. The new compounds are also for the manufacture of medicaments and/or for use in the treatment of e.g. Alzheimer's disease, in particular for cognitive impairment associated with Alzheimer's disease.

Abstract: The invention relates to novel substituted pyrazolopyrimidines. Chemically, the compounds are characterised by general Formula (I): with R1 being phenyl or pyridyl, any of which is substituted with 1 to 4, preferably 1 to 3 substituents X; X independently of each other being selected from C2-C6-alky1 or Ci-C6-alkoxy, where C2-C6-alkyl and C1-C6-alkoxy are at least dihalogenated up to perhalogenated. preferably with 2 to 6 halogen substituents, and the halogen atoms being selected from the group of fluoro, chloro and bromo, preferably fluoro; R2 being phenyl or heteroaryl, where phenyl is substituted by 1 to 3 radicals and heteroaryl is optionally substituted by 1 to 3 radicals in each case independently of one another selected from the group of C1-C6-alkyI, C1-C6-alkoxy, hydroxycarbonyl, cyano, trifluoromethyl, amino, nitro, hydroxy, C1-C6-alkylamino, halogen, C6-C10-arylcarbonylamino, C1-C6-alkylcarbonylamino, C1-C6-alkylaminocarbonyl. C1-C6-alkoxycarbonyl, C6-C10-arylaminocarbonyl, heteroarylaminocarbonyl.

Abstract: The invention relates to the substituted 1,2-ethylenediamines of general formula (I), wherein the groups R1 to R13, A, B, L and i are defined as in the description and the claims. The invention also relates to the use thereof in the treatment of Alzheimer's disease (AD) and similar diseases.

Abstract: The present invention relates to substituted amino-quinazolinones of general formula (I) wherein the groups R1 to R14 and A, are defined as in the specification and claims and the use thereof for the treatment of Alzheimer's disease (AD) and similar diseases.

Abstract: The present invention relates to substituted 1,2-ethylenediamines of general formula (I) wherein the groups R1 to R15, A, B, L, i as well as X1-X4 are defined as in the specification and claims and the use thereof for the treatment of Alzheimer's disease (AD) and similar diseases.

Abstract: Disclosed are dihydropteridinones of general formula (I) wherein the groups L and R1-R5 have the meanings given in the claims and specification, the pharmaceutical compositions, isomers, intermediates thereof and processes for preparing these dihydropteridinones. The compounds are useful the treatment and/or prevention of cancer, infections, inflammatory and autoimmune diseases.

Abstract: The invention relates to substituted 1,2-ethylenediamines of general formula (I), wherein the radicals R1-R13, A, B, L and i are as defined in the description and in the claims. The invention also relates to the use thereof for treating Alzheimer's disease (AD) and similar diseases.

Abstract: The invention relates to substituted 1,2-ethylenediamines of general formula (I), wherein the radicals R1-R13, A, B, L and i are as defined in the description and the claims. The invention also relates to the use thereof for treating Alzheimer's disease (AD) and similar diseases.

Abstract: The present invention relates to substituted 1,2-ethylenediamines of general formula (I) wherein the groups R1 to R15, A, B, L, i as well as X1—X4 are defined as in the specification and claims and the use thereof for the treatment of Alzheimer's disease (AD) and similar diseases.

Abstract: The present invention relates to substituted 1,2-ethylenediamines of general formula (I) wherein the groups R1 to R15, A, B, L, i as well as X1-X4 are defined as in the specification and claims and the use thereof for the treatment of Alzheimer's disease (AD) and similar diseases.

Abstract: Disclosed are new dihydropteridinones of general formula (I) whereby the groups L, R1, R2, R3, R4 and R5 have the meanings given in the claims and specification, the isomers thereof, processes for preparing these dihydropteridinones and their use as pharmaceutical compositions.

Abstract: The invention relates to substituted 1,2-ethylenediamines of general formula (I), wherein the radicals R1 to R13, A, B, L, and i are defined as indicated in the description and the claims, as well as the use thereof for treating Alzheimer's disease (AD) and similar diseases.

Abstract: The invention relates to a compound of the formula (I), wherein R1, R2, R3, R4, R5, R6, R7 and R8 are defined as in the specification and claims and to its use for treating or preventing Alzheimer's disease and other similar diseases.