New benzoselenazolinone compounds

A compound selected from those of formula (I):

• ##STR34## in which:
• R.sub.1 represents hydrogen or CO--NR.sub.7 R.sub.8, wherein
• R.sub.7 and R.sub.8, which may be identical or different, represent hydrogen, lower alkyl, or cycloalkyl having 3 to 8 carbon atoms inclusive, or aryl or substituted aryl or aryl(lower alkyl) or substituted aryl(lower alkyl), or, with the nitrogen atom which carries them, form a heterocyclic system,
• R.sub.4 represents:
• ##STR35## R.sub.2 represents hydrogen or lower alkyl optionally substituted with one or more halogen atoms or with hydroxyl or substituted with a group NR.sub.5 R.sub.6, in which R.sub.5 and R.sub.6, which may be identical or different, each represent, independently of one another, hydrogen, lower alkyl, aryl, substituted aryl, aryl(lower alkyl), or substituted aryl(lower alkyl), or alternatively R.sub.5 and R.sub.6, with the nitrogen atom which carries them, form a heterocyclic system,
• A represents CO, CHOH, or CH.sub.2,
• B represents hydrogen, lower alkyl, cycloalkyl having 3 to 8 carbon atoms, inclusive, lower alkenyl, lower alkynyl, aryl or substituted aryl, heteroaryl or substituted heteroaryl, aryl(lower alkyl), heteroaryl(lower alkyl), or substituted heteroaryl(lower alkyl), styryl or substituted styryl, or A and B together represent hydrogen when R.sub.1 represents --CO--NR.sub.7 R.sub.8,
• on the understanding that:
• the term heterocyclic in the definitions of R.sub.1 and R.sub.2 represents a mono- or bicyclic system, each ring being five- or six-membered and including in its carbon skeleton one or more identical or different hetero atoms selected from nitrogen, oxygen, and sulfur, and optionally substituted with lower alkyl, aryl, aryl substituted with arylalkyl, substituted arylalkyl;
• heteroaryl, substituted heteroaryl;
• one or more halogen atoms, or lower alkoxy,
• the term substituted qualifying the aryl, aryl(lower alkyl), heteroaryl and styryl groups in the definitions of R.sub.1, R.sub.2 and B means that these are substituted on the aromatic portion with one or more identical or different groups selected from lower alkyl, lower alkoxy, hydroxyl, trifluoromethyl, amino, and carboxyl, or with one or more halogen atoms,
• lower alkyl, lower alkoxy, lower alkenyl, and lower alkynyl mean linear or branched groups having 1 to 6 carbon atoms, inclusive,
• aryl means a group selected from phenyl and naphthyl,
• heteroaryl means a mono- or bicyclic aromatic group, each ring being five- or six-membered, the two rings collectively including in their carbon skeleton one to three hetero atoms selected from nitrogen, oxygen, and sulfur, its isomers, epimers and diastereoisomers, and, when B comprises carboxyl and phenolic hydroxyl or, when R.sub.1 represents hydrogen, its addition salts with a pharmaceutically-acceptable base, as well as, when R.sub.2 represents amino, its addition salts with a pharmaceutically-acceptable acid.

A pharmaceutical composition useful in alleviating inflammatory disorders containing as active principle at least one compound selected from those of formula (I):

• ##STR38## in which:
• R.sub.1 represents hydrogen or CO--NR.sub.7 R.sub.8, wherein R.sub.7 and R.sub.8, which may be identical or different, represent hydrogen, lower alkyl, or cycloalkyl having 3 to 8 carbon atoms inclusive, or aryl or substituted aryl or aryl(lower alkyl) or substituted aryl(lower alkyl), or, with the nitrogen atom which carries them, form a heterocyclic system, R.sub.4 represents:
• ##STR39## or alternatively:
• R.sub.4 forms a --C=O group with R.sub.1, R.sub.2 represents hydrogen or lower alkyl optionally substituted with one or more halogen atoms or with hydroxyl or, when R.sub.1 forms a CO group with R.sub.4, substituted with a group NR.sub.5 R.sub.6, in which R.sub.5 and R.sub.6, which may be identical or different, each represent, independently of one another, hydrogen, lower alkyl, aryl, substituted aryl, aryl(lower alkyl), or substituted aryl(lower alkyl), or alternatively R.sub.5 and R.sub.6, with the nitrogen atom which carries them, form a heterocyclic system, A represents CO, CHOH, or CH.sub.2, B represents hydrogen, lower alkyl, cycloalkyl having 3 to 8 carbon atoms, inclusive, lower alkenyl, lower alkynyl, aryl or substituted aryl, heteroaryl or substituted heteroaryl, aryl(lower alkyl), heteroaryl(lower alkyl), or substituted heteroaryl(lower alkyl), styryl, or substituted styryl, or A and B together represent hydrogen, on condition that, when A and B together represent hydrogen:
• if R.sub.1 forms a CO group with R.sub.4, then R.sub.2 connot represent methyl or hydrogen,
• if R.sub.1 does not form a CO group with R.sub.4, then R.sub.1 and R.sub.2 cannot simultaneously represent a hydrogen atom,
• on the understanding that:
• the term heterocyclic in the definitions of R.sub.1 and R.sub.2 represents a mono- or bicyclic system, each ring being five- or six-membered and including in its carbon skeleton one or more identical or different hetero atoms selected from nitrogen, oxygen, and sulfur, and optionally substituted with lower alkyl, aryl, aryl substituted with arylalkyl, substituted arylalkyl;
• heteroaryl, substituted heteroaryl;
• one or more halogen atoms, or lower alkoxy,
• the term substituted qualifying the aryl, aryl(lower alkyl), heteroaryl and styryl groups in the definitions of R.sub.1, R.sub.2 and B means that these are subsituted on the aromatic portion with one or more identical or different groups selected from lower alkyl, lower alkoxy, hydroxyl, trifluoromethyl, amino, and carboxyl, or with one or more halogen atoms,
• lower alkyl, lower alkoxy, lower alkenyl, and lower alkynyl mean linear or branched groups having 1 to 6 carbon atoms, inclusive,
• aryl means a group selected from phenyl and naphthyl,
• heteroaryl means a mono- or bicyclic aromatic group, each ring being five- or six-membered, the two rings collectively including in their carbon skeleton one to three hetero atoms selected from nitrogen, oxygen, and sulfur, its isomers, epimers and diastereoisomers, and, when B comprises carboxyl or phenolic hydroxyl or when R.sub.1 represents hydrogen, its addition salts with a pharmaceutically-acceptable base, as well as, when R.sub.2 represents amino, its addition salts with a pharmaceutically-acceptable acid, in combination with one or more pharmaceutically-acceptable excipients or vehicles.

A method of treating a living animal afflicted with an inflammatory disorder comprising the step of administering to the said living animal an amount of a compound selected from those of formula (I):

• ##STR40## in which:
• R.sub.1 represents hydrogen or CO--NR.sub.7 R.sub.8, wherein R.sub.7 and R.sub.8, which may be identical or different, represent hydrogen, lower alkyl, or cycloalkyl having 3 to 8 carbon atoms inclusive, or aryl or substituted aryl or aryl(lower alkyl) or substituted aryl(lower alkyl), or, with the nitrogen atom which carries them, form a heterocyclic system, R.sub.4 represents:
• ##STR41## or alternatively:
• R.sub.4 forms a --C=O group with R.sub.1, R.sub.2 represents hydrogen or lower alkyl optionally substituted with one or more halogen atoms or with hydroxyl or, when R.sub.1 forms a CO group with R.sub.4, substituted with a group NR.sub.5 R.sub.6, in which R.sub.5 and R.sub.6, which may be identical or different, each represent, independently of one another, hydrogen, lower alkyl, aryl, subsituted aryl, aryl(lower alkyl), or substituted aryl(lower alkyl), or alternatively R.sub.5 and R.sub.6, with the nitrogen atom which carries them, form a heterocyclic system, A represents CO, CHOH, or CH.sub.2, B represents hydrogen, lower alkyl, cycloalkyl having 3, to 8 carbon atoms, inclusive, lower alkenyl, lower alkynyl, aryl or substituted aryl, heteroaryl or substituted heteroaryl, aryl(lower alkyl), heteroaryl(lower alkyl), or substituted heteroaryl(lower alkyl), styryl, or substituted styryl, or A and B together represent hydrogen, on condition that, when A and B together represent hydrogen:
• if R.sub.1 forms a CO group with R.sub.4, then R.sub.2 cannot represent methyl or hydrogen,
• if R.sub.1 does not form a CO group with R.sub.4, then R.sub.1 and R.sub.2 cannot simultaneously represent a hydrogen atom,
• on the understanding that:
• the term heterocyclic in the definitions of R.sub.1 and R.sub.2 represents a mono- or bicyclic system, each ring being five- or six-membered and including in its carbon skeleton one or more identical or different hetero atoms selected from nitrogen, oxygen, and sulfur, and optionally substituted with lower alkyl, aryl, aryl substituted with arylalkyl, substituted arylalkyl;
• heteroaryl, substituted heteroaryl;
• one or more halogen atoms, or lower alkoxy,
• the term substituted qualifying the aryl, aryl(lower alkyl), heteroaryl and styryl groups in the definitions of R.sub.1, R.sub.2 and B means that these are substituted on the aromatic portion with one or more identical or different groups selected from lower alkyl, lower alkoxy, hydroxyl, trifluoromethyl, amino, and carboxyl, or with one or more halogen atoms,
• lower alkyl, lower alkoxy, lower alkenyl, and lower alkynyl mean linear or branched groups having 1 to 6 carbon atoms, inclusive,
• aryl means a group selected from phenyl and naphthyl, heteroaryl means a mono- or bicyclic aromatic group, each ring being five- or six-membered, the two rings collectively including in their carbon skeleton one to three hetero atoms selected from nitrogen, oxygen, and sulfur, its isomers, epimers and diastereoisomers, and, when B comprises carboxyl or phenolic hydroxyl or when R.sub.1 represents hydrogen, its addition salts with a pharmaceutically-acceptable base, as well as, when R.sub.2 represents amino, its addition salts with a pharmaceutically-acceptable acid, which is effective for alleviation of said disorder.