Substituted imidazolidines, their preparing process, and intermediates, their pharmaceutical compositions and there use

Imidazolidines of formula (I) in racemic, enantiomeric and diasteroisomeric forms, and their salts are new. In (I) ring is e.g. satd. heterocycle of 4-7 members contg. either O, N, S (opt. oxidised), and opt. substd. by a group selected from R3; Ar is e.g. aryl (opt. substd. by halo, CN, NO2, CF3, CF3O, OH, COOH or salified, esterified, or amidified COOH) or a gp. (ii) in which N is opt. oxidised and R1 and R2 are H or (substd.) alkyl, or form with N atom e.g. 5, 6 or 7 membered monocyclic ring opt. contg. other heteroatoms (O, N, S) and opt. substd. etc.; X is O or S; Y is O, S or NH; R3 is H, aryl, alkyl, alkenyl, alkynyl, opt. interrupted by one or more O, N, or S (opt. oxidised) atoms, and opt. substd.