The present invention relates to the compounds of formula (I):
##STR00001## in which A is a group of formula (a) or (b) ##STR00002##
in which R represents a hydrogen or halogen atom, an
--S(O).sub.z(C.sub.1-C.sub.4)alkyl group, an
--NHSO.sub.2(C.sub.1-C.sub.4)alkyl group, an
--SO.sub.2NH(C.sub.1-C.sub.4)alkyl group, an
--NHSO.sub.2phenyl-(C.sub.1-C.sub.4)alkyl group or an --NHSO.sub.2phenyl
group, said phenyl possibly being substituted with a halogen atom, with a
(C.sub.1-C.sub.4)alkyl group or with a (C.sub.1-C.sub.4)alkoxy group;
R.sub.1 represents a hydrogen atom or a (C.sub.1-C.sub.4)alkyl group, a
--CO(C.sub.1-C.sub.4)alkyl group, a phenyl-(C.sub.1-C.sub.4)alkyl group
or a --COphenyl group, said phenyl also possibly being substituted with a
halogen atom or with a (C.sub.1-C.sub.4)alkoxy group; R.sub.2 is a
hydrogen atom or an --SO.sub.2(C.sub.1-C.sub.4)alkyl group, an
--SO.sub.2phenyl-(C.sub.1-C.sub.4)alkyl group or an --SO.sub.2phenyl
group; X completes a ring of 5 to 8 atoms, said ring being saturated or
unsaturated, possibly being substituted with one or two
(C.sub.1-C.sub.4)alkyl groups and bearing one or two carbonyl groups; n,
m and z are, independently, 0, 1 or 2; R.sub.3 represents a hydrogen or
halogen atom, a (C.sub.1-C.sub.6)alkyl group, a (C.sub.1-C.sub.4)alkoxy
group, a --COO(C.sub.1-C.sub.4)alkyl group, a --CO(C.sub.1-C.sub.4)alkyl
group, an --NHSO.sub.2(C.sub.1-C.sub.4)alkyl group, an
--NHSO.sub.2phenyl-(C.sub.1-C.sub.4)alkyl groups, --NO.sub.2, --CN,
--CONR.sub.4R.sub.5, --COOH, or a 4,5-dihydro-1,3-oxazol-2-yl or
4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl group; R.sub.4 and R.sub.5
represent, independently, a hydrogen atom, a phenyl, a
(C.sub.1-C.sub.4)alkyl group or a phenyl-(C.sub.1-C.sub.4)alkyl group or
R.sub.4 and R.sub.5 with the nitrogen atom to which they are attached,
may form a ring of 5 to 7 atoms in total; and to the salts or solvates
thereof, to the pharmaceutical compositions containing them, to a process
for the preparation thereof and to intermediates in this process.