| abstract |
Imidazoles of formula (I)n wherein A is a chemical bond or a straight or branched, saturated or unsaturated, aliphatic residue having from 1 to 6 carbon atoms, optionally substituted and/or optionally including 1, 2 or3 heteroatoms selected from oxygen, sulphur and nitrogen providing (in the case of 2 or 3 heteroatoms) that any such heteroatom is not located adjacent to a further such heteroatom or heteroatoms, the total number of said carbon atoms and heteroatoms not exceeding 6. n R is a fused, saturated or unsaturated, non-aromatic carbocyclic, bi- or tri-cyclic ring system providing that when R is a 9- decahydronaphthyl group, A does not represent a carbonyl group, a saturated or unsaturated, carbocyclic spirocyclic ring system, optionally containing one or more ring heteroatoms selected from oxygen, sulphur and nitrogen; or a saturated or unsaturated. carbocyclic bridged-polycyclic ring system, optionally containing one or more ring heteroatoms selected from oxygen, sulphur and nitrogen and having one or more bridges providing that when R is an adamantanyl group, A does not represent an ethylene radical (-(CH 2 ) 2 -) substituted at the carbon atom a to the adamantanyl group by a hydroxy, oxo, ether or thioether grouping; or AR together represent a straight or branched, saturated or unsaturated, aliphatic residue having 3 to 6 carbon atoms, optionally substituted and/or optionally including 1, 2 or 3 heteroatoms selected from oxygen, sulphur and nitrogen providing (in the case of 2 or 3 heteroatoms) that any such heteroatom is not located adjacent to a further such heteroatom or heteroatoms, the total number of said carbon and heteroatoms not exceeding 6; which aliphatic residue is substituted by at least two groups, which may be the same or different, selected from the groups specified for R above and acid addition salts and pharmaceutically acceptable bioprecursors thereof. n Methods of preparing the imidazoles are disclosed n The imidazoles and their acid addition salts an bioprecur. sors are useful in the treatment of prophylaxis of thrombo- embolic conditions. |