Abstract: The invention relates to substituted 2-alkylsulfanyl-3-(arylsulfonyl)-cycloalkyl[e and d]pyrazolo[1,5-a]pyrimidines, to serotonin 5-HT6 receptor antagonists, to novel drug substances and pharmaceutical compositions, comprising the said conpounds as active ingredients, to novel medicaments and methods for treatment and prophylaxis of CNS diseases of humans and warm blooded animals pathogenesis of which is associated with 5-HT6 receptors. In general formulas 1 and 2 R1 represents hydrogen or C1-C3 alkyl; R2 represents C1-C3 alkyl; R3 represents hydrogen, one or more optionally identical halogens, C1-C3 alkyl or hydroxyl optionally substituted with C1-C3 alkyl; n represents the whole numbers 1, 2 or 3.

Abstract: The invention relates to novel ligands of 5-HT6 receptor, to a pharmaceutical composition containing said novel ligands of 5-HT6 receptor as active component and to novel medicaments used for humans and warm-blooded animals for treating diseases and conditions of central nervous system, in pathogenesis of which neuromediator systems induced by 5-HT6 receptors are playing an essential role. Azaheterocyclic compounds of the general formula 1 or racemates, or optical or geometrical isomers, or pharmaceutically acceptable salts and/or hydrates thereof are used as 5-HT6 ligands.

Abstract: The invention relates to serotonin 5-HT6 receptor antagonists—novel 2-amino-3-arylsulfonyl-6,7,8,9-tetrahydropyrazolo[1,5-a]pyrido[4,3-e]pyrimidines and substituted 2-amino-3-arylsulfonyl-5,6,7,8-tetrahydropyrazolo[1,5-a]pyrido[4,3-d]pyrimidines, drug substances and pharmaceutical compositions comprising the said drug substances as the said compounds, and also to method of prophylaxis and treatment of various diseases of central nervious system in humans and animals pathogenesis of which is associated with serotonin 5-HT6 receptors including cognitive and neurodegenerative diseases. Substituted 2-amino-3-arylsulfonyl-6,7,8,9-tetrahydropyrazolo[1,5-a]pyrido[4,3-e]pyrimidines of the general formula 1 and substituted 2-amino-3-arylsulfonyl-5,6,7,8-tetrahydropyrazolo[1,5-a]pyrido[4,3-d]pyrimidines of the general formula 2 and pharmaceutically acceptable salts and/or hydrates thereof.

Abstract: The invention relates to novel ligands the broad spectrum of biological activity of which includes simultaneously ?-adrenoceptors, dopamine receptors, histamine receptors, imidazoline receptors and serotonin receptors, among them serotonin 5-HT7 receptors, which are compounds of general formula 1 in the form of free bases, geometrical isomers, racemic mixtures or individual optical isomers, pharmaceutically acceptable salts and/or hydrates, wherein: R1 is a substituent of amino group, selected from hydrogen, optionally substituted C1-C4 alkyl, acyl, heterocyclyl, alkoxycarbonyl, substituted sulfonyl; R2 is a substituent of cyclic system, selected from hydrogen, halogen, optionally substituted C1-C4 alkyl, CF3, CN, alkoxy, alkoxycarbonyl, carboxyl, heterocyclyl or substituted sulfonyl; Ar is optionally substituted aryl not necessarily annalated with heterocyclyl, or optionally substituted aromatic heterocyclyl; W is optionally substituted (CH2)m group, optionally substituted CH?CH group, optionally subst

Abstract: The present invention relates to serotonin 5-HT6 receptor antagonists-novel substituted 3-sulfonyl-6,7,8,9-tetrahydropyrazolo[1,5-a]pyrido[4,3-e]pyrimidines and substituted 3-sulfonyl-5,6,7,8-tetrahydropyrazolo[1,5-a]pyrido[4,3-d]pyrimidines, drug substances and pharmaceutical compositions comprising drug substances as the mentioned above compounds and to the method of prophylaxis and treatment of various conditions and diseases of central nervous system in humans and warm-blooded animals pathogenesis of which is associated with serotonin 5-HT6 receptors. In formulas 1 and 2 Ar is optionally substituted aryl or optionally substituted heterocyclyl; R1 is hydrogen, optionally substituted lower C1-C3 alkyl, substituted hydroxyl group, substituted sulfanyl group; R2 is hydrogen or optionally substituted C1-C3 alkyl; R3 is hydrogen, optionally substituted C1-C3 alkyl or tert.-butyloxycarbonyl.

Abstract: The invention relates to substituted 2-alkylamino-3-(arylsulfonyl)cycloalkyl[e or d]pyrazolo[1,5-a]pyrimidines, to serotonin 5-HT6 receptor antagonists, to novel drug substances and pharmaceutical compositions comprising the said compounds as active ingredients, and to novel medicaments and method for treatment and prophylaxis of various CNS diseases. 2-Alkylamino-3-arylsulfonylcycloalkyl[e]pyrazolo[1,5-a]pyrimidines of general formula 1 and 2-alkylamino-3-arylsulfonylcycloalkyl[d]pyrazolo[1,5-a]pyrimidines of general formula 2, wherein: R1 is hydrogen or C1-C3 alkyl; R2 is C1-C3 alkyl; R3 is hydrogen, one or more optionally identical halogen atoms, C1-C3 alkyl or hydroxyl group optionally substituted with C1-C3 alkyl; n is the whole numbers 1, 2 or 3.

Abstract: The present invention relates to novel substituted 2-amino-3-(arylsulfonyl)pyrazolo[1,5-a]pyrimidines of general formula 1, to serotonin 5-HT6 receptor antagonists, to novel drug substances and pharmaceutical compositions, to medicaments, methods for preparation thereof, and to methods for prophylaxis and treatment of various CNS diseases, pathogenesis of which is associated with disturbance of monoaminergic signaling pathways, more specifically over- or hypo-activation of serotonin 5-HT6 receptors. Ar represents optionally substituted aryl or optionally substituted heterocyclyl; R1 and R3 independently of each other represent C1-C3 alkyl or aryl; R2 represents hydrogen or C1-C3 alkyl; R41, and R42 independently of each other represent hydrogen, optionally substituted C1-C3 alkyl or optionally substituted phenyl, or R41, and R42 together with nitrogen atom they are attached to form optionally substituted heterocyclyl.

Abstract: The invention relates to antagonists of serotonin 5-HT6 receptors simultaneously regulating homeostasis of Ca+2 ions in cells, representing substituted 2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indoles of the general formula 1, pharmaceutically acceptable salts and/or hydrate thereof. In the general formula 1: R1 represents amino group substituent selected from optionally substituted C1-C5 alkyl; R2, is one or more substituents selected from hydrogen, halogen, C1-C3 alkyl, CF3, OCF3; Ar is phenyl optionally substituted with halogen, C1-C6 alkyl, C1-C6 alkoxy, substituted amino group, or CF3; or optionally substituted aromatic 6-membered heterocycle comprising 1-2 nitrogen atoms in the cycle; W represents ethylene group —CH2—CH2—, ethenyl group —CH?CH—, or ethynyl group —C?C—. The invention also relates to the novel compounds selected from the compounds of the general formula 1, methods for their preparation, pharmaceutical compositions and methods of their use.