Isf S.p.a.

I.s.f. Societa Per Azioni

Societe I.s.f. S.p.a.

Silvano Banfi

Mario Pinza

Carlo Farina

Ugo C Pfeiffer

Giorgio Pifferi

Renato Pellegata

The invention relates to 4-hydroxy pyrrolidone derivatives which help restore learning and memory difficulties associated with ageing. A compound of the invention is 2-(4-hydroxy-2-oxo-1-pyrrolidineacetamido)acetamide.

A process for making pyrrolidone derivatives

Pyrrolidone derivatives and memory enhancement use thereof

The invention relates to 5-oxo-1-imidazolidineacetamide derivatives which help restore learning and memory difficulties associated with ageing. A compound of the invention is 2,2-dimethyl-5-oxo-1-imidazolidineacetamide.

Pharmacologically active 5-oxo-1-imidazolidine acetamide compounds

The invention relates to 4-imidazolidinone derivatives which help restore learning and memory difficulties associated with ageing. A compound of the invention is 1-(2-aminoacetyl)-2,2-dimethyl-4-imidazolidinone, of the formula: ##STR1##

Nootropic imidazolidinones

Preparation of compounds of the formula: ##STR1## wherein n is 1, 2 or 3, R.sub.1 and R.sub.2, which may be the same or different, are hydrogen or alkyl containing 1 to 3 carbon atoms and the asterisk indicates the center of asymmetry of the molecule, and compounds of the formula ##STR2## wherein R' is a saturated or unsaturated aliphatic hydrocarbon containing 1 to 6 carbon atoms, R.sub.3 is hydrogen or acyl containing 1 to 7 carbon atoms and the asterisk indicates the center of asymmetry of the molecule. The compounds produced by the present invention improve learning memory and display a protecting effect against the E.E.G. consequence of an overdose of barbiturates and against the reduced performance following brain damage (e.g. cerebral edema).

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Milan, Italy

Silvano Banfi