A method for treating a disorder selected from the group consisting of depression, anxiety disorders, bipolar disorder, attention deficit hyperactivity disorder, stress-related disorders, psychotic disorders, schizophrenia, neurological diseases, Parkinson's disease, neurodegenerative disorders, Alzheimer's disease, epilepsy, migraine, hypertension, substance abuse and metabolic disorders, eating disorders, diabetes, diabetic complications, obesity, dyslipidemia, disorders of energy consumption and assimilation, disorders and malfunction of body temperature homeostasis, disorders of sleep and circadian rhythm, and cardiovascular disorders comprising administering to an individual a therapeutically effective amount of a compound of formula I
- wherein
- R1 is hydrogen, tritium, hydroxy, lower alkyl, lower alkoxy, halogen, nitro, amino or lower alkyl substituted by halogen;
- R2 is hydrogen, hydroxy or lower alkyl;
- X is N and Y is CH or CH2 or CH-lower alkyl or
- X is CH and Y is N;
- Q is CH2, O, NH, N-alkyl, N—SO2-alkyl or N—SO2-toluen-4-yl;
- W is CH2 or a bond
- m and n are each independently 1, 2 or 3;
- when m is 2 or 3, R2 may be the same or different;
- when n is 2 or 3, R1 may be the same or different;
- the dotted lines each independently represent an optional bond;
- or a pharmaceutically active salt, racemic mixture, enantiomer, optical isomer or tautomeric form thereof.