Method of improving sleep

摘要

The use for the manufacture of a medicament for improving sleep and treating sleep disorders of a piperazine derivative of formula wherein R<1> is hydrogen or C1-6alkyl; X is C1-6alkyl, hydroxyC1-6alkyl, C1-6alkyloxyC1-6alkyl, aminocarbonyl, mono- and di(C1-6alkyl)aminocarbonyl, carboxyl, C1-6alkyloxycarbonyl, (aminocarbonyl)C1-6alkyl, [mono- and di(C1-6alkyl)aminocarbonyl]C1-6alkyl, carboxylC1-6alkyl, (C1-6alkyloxycarbonyl)C1-6alkyl or (hydroxyC1-6alkyl)aminocarbonyl; R<2> is hydrogen or C1-6alkyl; Ar is phenyl, pyridinyl, pyrazolyl, all three being optionally substituted, or a radical of formula Q is aryl, aryloxy, diarylmethoxy, 2,2-diarylethenyl, diarylmethylcarbonyl, arylcarbonyl, mono- and diarylaminocarbonyl, diarylmethyl or arylamino, the amino moiety in said arylamino being optionally substituted, the pharmaceutically acceptable acid addition salts and possible stereochemically isomeric forms thereof; novel compounds of formula (I); pharmaceutical compositions containing the latter compounds as an active ingredient and methods of preparing said compounds and pharmaceutical compositions.