Thiaxozle, oxazole, imidazole, isoxazole and isoxazoline compounds of the formula ##STR00001## wherein Het is thiazole, oxazole, imidazole, isoxazole or isoxazoline, n is an integer from 0 to 6, A is selected from the various optionally substituted aromatic radicals defined in the specification, B is hydrogen, alkyl or phenyl, R.sup.1 and R.sup.2 are independently hydrogen, alkyl or cycloalkyl or R.sup.1 and R.sup.2 taken together with the carbon atom which carries them, form a carbocycle with 3 to 7 members and .OMEGA. is --NH.sup.46R.sup.47 or --OR.sup.48, R.sup.46 and R.sup.47 are independently hydrogen, alkyl, cycloalkyl or --(CH.sub.2).sub.kCOOR.sup.51, R.sup.51 is alkyl or haloalkyl and R.sup.48 is hydrogen or alkyl having advantageous pharmacological properties which allow their use in therapeutics, for treating neurodegenerative disorders or pain.