Oxazolopyridine compounds, compositions and use

A compound selected from those of formula (I):

• ##STR18## in which:
• R.sub.1 and R.sub.2, with the oxygen and the nitrogen to which attached, form an --O--CO--N-- linkage, corresponding to that of an oxazolo[5,4-b]pyrindin-2-one,
• Z represents halogen, linear or branched lower alkyl of 1 to 6 carbon atoms, inclusive linear or branched lower alkoxy of 1 to 6 carbon atoms inclusive, or trifluoromethyl,
• m is 0, 1, 2, or 3,
• A is linear or branched alkyl of 1 to 6 carbon atoms, inclusive
• R.sub.3 and R.sub.4, which may be identical or different, represent:
• hydrogen,
• linear or branched lower alkyl of 1 to 6 carbon atoms, inclusive
• linear or branched lower alkenyl of 2 to 6 carbon atoms, inclusive
• optionally substituted aryl,
• optionally substituted arylalkyl in which the alkyl chain contains 1 to 3 carbon atoms, inclusive
• mono- or bicyclic cycloalkyl of 3 to 10 carbon atoms, inclusive or alternatively:
• R.sub.3 and R.sub.4, with the nitrogen atom to which they are linked, constitute a saturated heterocyclic system optionally substituted with one or more:
• hydroxyl,
• oxo,
• linear or branched lower alkyl of 1 to 6 carbon atoms, inclusive
• optionally substituted aryl,
• optionally substituted arylalkyl or optionally substituted diarylalkyl in which the alkyl chain contains 1 to 3 carbon atoms, inclusive, ##STR19## wherein R.sub.5 represents:
• hydrogen,
• linear or branched lower alkyl of 2 to 6 carbon atoms, inclusive
• optionally substituted aryl,
• optionally substituted aralkyl in which the alkyl chain contains 1 to 3 carbon atoms, inclusive
• R.sub.6 and R.sub.7, which may be identical or different, have the same meaning as R.sub.5,
• its isomers, epimers and diastereoisomers,
• its addition salts with a pharmaceutically-acceptable acid,
• aryl being understood to mean an aromatic, mono- or bicyclic group containing 5 to 12 carbon atoms, inclusive
• the term (substituted) associated with the expresions aryl, arylalkyl, and diarylalkyl, meaning that the aryl ring-system can be substituted with one or more linear or branched lower alkyl haviong 1 to 6 carbon atoms, inclusive, linear or branched lower lower alkoxy having 1 to 6 carbon atoms inclusive or hydroxyl, nitro, halogen, or trifluoromethyl.