Abstract: A compound selected from those of formula (I): wherein: Ra represents linear or branched (C1–C6)alkylene, X represents a group selected from W1, —C(W1)—W2—, —W2—C(W1)—, —W2—C(W1)W2—, —W2—Ra— and —CH(OR1)— wherein W1, W2 and R1 are as defined in the description, when Y represents aryl or heteroaryl, or X represents a group selected from single bond, —C(W1)—, —W2—C(W1)—, —W2—Ra and —CH(OR1)— wherein W1, W2, Ra and R1 are as defined hereinbefore, when Y represents a fused bicyclic group, of formula: wherein: A represents nitrogen-containing heterocycle having from 4 to 7 ring members that is unsaturated or partially saturated and optionally contains a second hetero atom, B represents phenyl ring optionally substituted by one or more groups as defined in the description, its isomers, and addition salts thereof with a pharmaceutically acceptable acid or base, medicinal products containing the same are useful in the treatment of cognitive deficiencies.

Abstract: A compound selected from those of formula (I): 1

Abstract: A compound selected from those of formula (I): wherein: represents single or double bond, R1 represents hydrogen, alkyl, —R6-aryl, —R6-cycloalkyl, —R6-heterocycle, —CO2R7—, —COR8, or —CONHR8, wherein R6, R7, and R8 are as defined in the description, R2 represents cyano, mono- or di-alkylaminoalkylaminocarbonyl, —CO2R8, —CONHR8, —NR8R9, —NHCO2R7, or —COR8 wherein R7, R8, and R9 are as defined in the description, R3 and R4 together form (C3-C10)cycloalkyl, R5 represents hydrogen, alkyl, or arylalkyl, Ra, Rb, Rc, Rd, which may be identical or different, represent a group as defined in the description, its isomers, and pharmaceutically-acceptable acid or base addition salts thereof, and medicinal products containing the same which are useful in the treatment of CNS disorders.

Abstract: A compound of formula (I): ##STR1## wherein: R.sub.1 represents unsubstituted or substituted cycloalkyl, phenyl, naphthyl, heterocyclic, alkyl or alkenyl,A represents a bond, oxygen, sulphur, a group ##STR2## a group ##STR3## or a group ##STR4## wherein Rc represents hydrogen, alkyl or cycloalkyl, R.sub.2 represents halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, cycloalkyl, formyl, carboxy, alkylcarbonyl, cycloalkylcarbonyl, alkoxycarbonyl, cycloalkyloxycarbonyl, optionally substituted carbamoyl, optionally substituted amino, formylamino, cyano, optionally substituted amidino, hydroxyaminomethyl, amide oxime, hydrazono, or a group selected from: ##STR5## wherein R.sub.21, R.sub.22 and R.sub.23 are as defined in the description, R.sub.

Abstract: A compound selected from those of formula (I): ##STR1## in which the groups R.sub.1 to R.sub.8 are as defined the description. Medicaments.