Heterocyclic compounds

A compound selected from those of formula (I):

• ##STR40## in which:
• X represents halogen,
• n represents 0, 1, or 2,
• B represents groups ##STR41## in which:
• A represents either:
• * the radical ##STR42## in which x represents 0 or 1, Alk represents a saturated bivalent hydrocarbon radical having from 3 to 6 carbon atoms inclusive in a straight or branched chain, and Z represents a radical selected from the group consisting of:
• a) nitrile, carboxy or alkoxycarbonyl,
• b) the radical ##STR43## in which each of m and p, independently of the other, represents 1 or 2, z represents 0 to (m+2) inclusive and R represents alkyl having 1 to 5 carbon atoms inclusive in a straight or branched chain, aryl, or arylalkyl, each of which is optionally substituted,
• c) the radical ##STR44## in which R.sub.4 represents hydrogen, carboxy, alkoxycarbonyl, or optionally substituted aminocarbonyl,
• d) the radical ##STR45## in which each of W and W', independently of the other, represents H.sub.2, O or S, t represents 0 or 1, r represents 1 to 2, q represents 0 to (r+2) inclusive and R is as defined above,
• e) the radical ##STR46## in which W, W' and r are as defined above and each of R.sub.a and R'.sub.a, independently of the other, represents hydrogen, alkyl having 1 to 5 carbon atoms inclusive in a straight or branched chain, optionally substituted aryl, or optionally substituted arylalkyl,
• f) the radical ##STR47## in which E represents O, S or the group N-H, each of s and u, independently of the other, represents 1 or 2 and R is as defined above,
• * or the radical ##STR48## in which v represents 1 to 4 inclusive, R.sub.a and x are as defined above and each of R.sub.b and R'.sub.b, independently of the other, represents alkyl having 1 to 5 carbon atoms inclusive in a straight or branched chain, optionally substituted aryl, or optionally substituted arylalkyl,
• * or the radical ##STR49## in which x is as defined above and R.sub.5 represents a hydrocarbon radical having 5 to 20 carbon atoms inclusive in a straight or branched chain and including at least one unsaturation in the form of a double bond,
• and Y, represents the group A as defined above,
• with the following restrictions:
• when A represents the radical .paren open-st.SO.sub.2 .paren close-st..sub.x Alk-Z and when x simultaneously is different from 0, Z must represent other than nitrile or carboxy or alkoxycarbonyl,
• it being understood that, unless otherwise specified, "aryl radical" represents a radical chosen from phenyl and naphtyl, "arylalkyl radical" represents a radical chosen from phenyl and naphthyl bound to an alkyl radical containing 1 to 4 carbon atoms inclusive and "heteroaryl radical" represents a radical chosen from pyridyl, pyrrolyl, pyrazinyl, pyridazinyl, pyrimidazinyl, quinolyl and indolyl,
• it being also understood that, unless otherwise specified, the expression "optionally substituted" means that the alkyl, aryl, arylalkyl or heteroaryl group may be substituted by one or more substituents chosen from halogen, hydroxy, nitro, cyano, alkyl, alkoxy, acyl, haloalkyl, amino, alkylamino and dialkylamino.
• and their possible stereoisomers, epimers, N-oxides and addition salts with a pharmaceutically acceptable acid or base.