Pharmacologically active alicyclic-substituted pyrazolo[1,5-a]pyrimidine derivatives

A compound of formula (I) wherein:

• R1 and R2 are independently selected from hydrogen, halogen atom, C1-6alkyl, or haloC1-6alkyl;
• R3 is hydrogen, halogen atom, C1-6alkyl, or cyano group;
• R4 is C1-6alkyl;
• R5 is C1-6alkyl optionally substituted by a halogen atom, halogen atoms, C3-5 cycloalkyl;
• C3-5 cycloalkylC1-6alkyl, dialkylamino, C1-6alkoxy, C1-6alkoxyC1-6alkyl, C1-6alkylthio group, tetrahydrofuranyl, tetrahydrofuranylC1-6alkyl, tetrahydropyranyl, or tetrahydropyranylC1-6alkyl;
• or R4 and R5 together form a 3 to 7-membered saturated ring, wherein the 3 to 7-membered saturated ring is unsubstituted or substituted by one or more C1-3alkyl, C1-3alkoxy, haloC1-3alkyl, or C1-3alkylcarbonyl, and wherein the members of the ring are selected from the group consisting of carbon, nitrogen, oxygen, and sulphur;
• R6 is hydrogen, halogen atom, C1-6alkyl, hydroxyl, C1-6alkoxy, C1-6alkoxyC1-6alkyl, haloC1-6alkyl, or an amino group;
• or pharmaceutically acceptable salts, hydrolysable esters, racemates, enantiomers, diastereomers, solvates and hydrates thereof.