NOVEL HETEROCYCLES AS INHIBITORS OF LEUKOCYTE ADHESION AND AS ANTAGONISTS OF VLA-4

Use of N-substituted pyrrolidone, imidazolidinone, oxazolidinone or thiazolidinone derivatives of formula (I), in all stereoisomer or mixture forms, or their salts as medicaments is new. W = R1-A-CR13 or R1A-CH=C; Y = CO, CS or CH2; Z = O, S or CH2 etc.; A = direct bond, 3-12C cycloalkylene, (1-6C) alkylene-(3-12C) cycloalkylene, phenylene, or the divalent residue of a 5- or 6-membered ring containing 1 or 2 N (optionally mono- or disubstituted) etc.; B = 1-6C alkylene (optionally substituted), 2-6C alkenylene, phenylene, phenylene-(1-3C) alkyl or (1-3C) alkylene-phenylene; D = CR2R3, NR3 or CH=CR3; E = tetrazolyl, SO3H etc.; R = H, alkyl, cycloalkyl, cycloalkylalkyl, Ar, Ar-alkyl, Het' or Het '-alkyl (where alkyl residues are optionally substituted by one or more F); R1 = SR21, SSR21, SOR22, SO2R22, S-OR21, SO-OR21, SO2-OR21, SCOR21, SCOOR22, SCSSR22, OCOR21, OCSR21, OCOOR22, OSO2R22, OSO-R22, OP(O)(OR21)2, P(O)(OR21)2, P(O)(R22)OR21, CN, halo etc.; R2 = H, alkyl, Ar, Ar-alkyl or 3-8C cycloalkyl; R3 = H, alkyl, Ar, Ar-alkyl, 3-8C cycloalkyl, alkenyl, alkynyl, alkenylcarbonyl, alkynylcarbonyl, pyridyl etc.; R13 = H, 1-6C alkyl, Ar, Ar-alkyl, 3-8C cycloalkyl or (3-8C) cycloalkylalkyl; R21 = H, alkyl, hydroxyalkyl, alkenyl, cycloalkyl, cycloalkylalkyl, Ar, Ar-alkyl, Het' or Het'-alkyl (where alkyl residues are optionally substituted by one or more F); b, c, d, f = 0 or 1 provided not all are 0; e, g,h = 0-6; Ar = optionally substituted 6-14C aryl; Het' = optionally substituted heteroaryl; unless specified otherwise alkyl moieties have 1-8C, alkenyl or alkynyl moieties 2-8C, cycloalkyl moieties 3-12C and bi- or tri-cycloalkyl moieties 6-12C.