Intermediates 4-heteroaryl-piperidine and its preparation.

This invention describes NEW OF FORMULA (I, II) compounds wherein X is O, S, or NR wherein R is HO ALKYL C SUB 1-4, Z is hydrogen, halogen, trifluoromethyl, C 1-8 SUB, ALKYL C SUB 1-8 straight or branched alkyl, nitro, alkenyl C SUB 2-8, or a group mono- or disubstituted amino ALKYL C SUB 1-4, R 1 is H or ALKYL ELEVATED C 1-8 SUB LINE or branched. The invention discloses also a method for preparing a compound of formula (I & II).