ORTHO-CONDENSED PYRROLE DERIVATIVES AND PHARMACEUTICAL COMPOSITIONS

The invention provides novel pyrrole derivatives of formula: (I) in which R'=H, alkyl or phenyl optionally substituted by halogen, alkyl, alkyloxy or alkylthio, Z=0 or S, p=0 or 1, and either A is a heterocyclic ring such that it forms, with pyrrole, a 1H,3H-pyrrolo[1,2-c]thiazole, 2,3-dihydro-1H-pyrrolizine optionally substituted by OH, 5,6,7,8-tetrahydroindolizine, 1,2-dihydro-4H-pyrrolo[1,2-c]-1,3-thiazine, 2,3-dihydropyrrolo[2,1-b]thiazole, 1H,3H-pyrrolo[1,2-c]oxazole, 1,2-dihydro-4H-pyrrolo]1,2-c]-1,3-oxazine or 2,3-dihydropyrrolo[2,1-b]oxazole ring system, n=0 or 1, Het=3-pyridyl or 5-thiazolyl, and (1) either R=H, halogen, alkyl or phenyl optionally substituted by halogen, alkyloxy or alkylthio and Y=alkyl or phenyl optionally substituted by halogen, alkyl, alkyloxy or alkylthio, or Y=-NR1R2 with: either R1=H and R2=unsubstituted alkyl, cycloalkyl (C3-C6), alkenyl (C2-C4), alkynyl (C3-C4), benzyl or phenyl radicals optionally substituted by halogen, alkyl, alkyloxy, alkylthio, CF3 or NO2, or R2=adamantyl, pyridyl or pyridylmethyl, or R1 and R2=both unsubstituted alkyl or R1 and R2 from a 4-phenylpiperazin-1-yl radical the phenyl part of which may be substituted by halogen, alkyl, alkyloxy, alkylthio, CF3 or NO2 (2) or R=halogen, alkyl or phenyl optionally substituted by halogen, alkyloxy or alkylthio, and Y=NH2 or A is a heterocyclic ring such that it forms, with pyrrole, a 2,3-dihydro-1H-pyrrolizine substituted by OH, 2,3-dihydropyrrolo[2,1-b]thiazole or 2,3-dihydropyrrolo[2,1-b]oxazole ring system, R=H, Y=NH2, n=0 or 1 or Het=5-thiazolyl or 3-pyridyl, or A is a heterocyclic ring such that it forms, with pyrrole, a 1H,3H-pyrrolo[1,2-c]thiazole, 2,3-dihydro-1H-pyrrolizine, 5,6,7,8-tetrahydroindolizine, 1,2-dihydro-4H-pyrrolo[1,2-c]-1,3-thiazine, 1H,3H-pyrrolo[1,2-c]oxazole or 1,2-dihydro-4H-pyrrolo[1,2-c]-1,3-oxazine ring system, R=H, Y=NH2 and either Het=5-thiazolyl and n=0 or 1 or Het=3-pyridyl and n=1, the alkyl containing 1 to 4 C as a straight or branched chain, and their acid addition salts, pharmaceutical compositions containing the said pyrrole derivatives and process for their preparation. These pyrrole derivatives are useful in prophylactic and therapeutic treatment of thrombotic complaints.