PROPYLISOPROPYL ACETIC ACID AND PROPYLISOPROPYL ACETAMIDE STEREOISOMERS, A METHOD FOR THEIR SYNTHESIS AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

The present invention relates to recemic propylisopropyl acetic acid and propylisopropyl acetamide and their isomers in their racemic and stereospecific forms, for use in treatment of neurological and psychotic disorders, and affective disorders and to treat pain, headaches and migraines. The isomers are of the compound formula (I) wherein R1 is a methyl or ethyl group; R2 is H, methyl or an ethyl group; R3 is ethyl or a propyl group; and R4 is a hydroxyl or amide group, and the total number of carbon atoms in said compound is 8, provided that when R1 is a methyl group and R4 is an amide group, R2 and R3 are not ethyl, further provided that when R1 is an ethyl and R4 a hydroxy group, only stereoisomers of the compound are referred to. The present invention further relates to a method for the stereoselective synthesis of the 2R stereoisomer of PID and PIA. The present invention also relates to pharmaceutical compositions containing as an active ingredient a racemic mixture or stereoisomers of the compounds of general formula (I), which are useful for the treatment of neurological and psychotic disorders, and affective disorders and to treat pain, headaches and migraines.