[EN] NOVEL COMPOUNDS FOR USE IN COGNITION IMPROVEMENT<br/>[FR] NOUVEAUX COMPOSÉS À UTILISER POUR AMÉLIORER LA COGNITION
申请人:FUNDACIÓN PARA LA INVESTIGACIÓN MÉDICA APLIC
公开号:WO2016020307A1
公开(公告)日:2016-02-11
Novel compounds for use in cognition improvement It relates to certain compounds having a polycyclic structure and a -(C=O)NRaRb moiety, wherein the polycyclic structure comprises at least three ring systems, wherein one ring system is a polycyclic ring system comprising from 2 to 4 rings; at least one ring is an aromatic ring; and wherein the structure comprises at least 3 nitrogen atoms and 1 oxygen atom. It also relates to pharmaceutical compositions containing them, and to their use in medicine, in particular in the treatment and/or prevention of neurological disorders coursing with a cognition deficit or impairment, or neurodegenerative diseases.
There are provided compounds of the general formula (I): ##STR1## and physiologically acceptable salts thereof in which Z represents a group ##STR2## wherein R.sub.2 represents a hydrogen atom or a straight or branched chain alkyl radical, or Z can additionally represent a group ##STR3## and R.sub.1, R.sub.3 and R.sub.4, which may be the same or different, each represent a hydrogen atom, a cycloalkyl group, an aryl group which may optionally be substituted by one or more hydroxy, alkoxy, or halogen radicals, or a straight or branched alkyl or alkenyl group, which alkyl or alkenyl group may be substituted with an aryl group, which aryl group may optionally be substituted by one or more hydroxy, alkoxy or halogen radicals. The compounds possess spasmolytic and cAMP phosphodiesterase inhibitory activity.
[EN] A METHOD FOR THE PREPARATION AND ISOLATION OF SALTS OF VARDENAFIL WITH ACIDS<br/>[FR] PROCÉDÉ DE PRÉPARATION ET D'ISOLEMENT DE SELS DE VARDÉNAFIL UTILISANT DES ACIDES
申请人:ZENTIVA KS
公开号:WO2013075680A1
公开(公告)日:2013-05-30
The subject of this invention provides a method of preparation and isolation of water-insoluble or partially soluble salts of vardenafil of formula 1, in particular its salts with acids in the ratio of components 1 : 1 (of formula 2a, HA stands for any acid), and of crystalline hydrates of said salts. These solid forms, in particular crystalline vardenafil hydrochloride trihydrate of formula 4, can be directly, without additional purification, used in preparation of a medicine for the therapy of erectile dysfunction. The present solution is based on using water as a suitable medium both for obtaining of extracts of the water-soluble forms of vardenafil, and for isolation and subsequent crystallization of solid water-insoluble or partially soluble salts of vardenafil with acids (1 : 1). Crystallization of the isolated salts takes place after adjustment of pH of the aqueous solutions by means of aqueous solutions of bases or acids, wherein no organic solvent or a mixture thereof with water is needed for the crystallization. The method according to this invention reduces costs for organic solvents, increases efficiency of isolation of the vardenafil salts with acids, and facilitates preparation of poorly stable hydrates of these salts.
Compounds of the formula (I) ##STR1## (in which X represents HS-- or a group R.sub.1 R.sub.2 N-- wherein R.sub.1 and R.sub.2 which may be the same or different represent hydrogen or a straight or branched chain alkyl group containing from 1 to 4 carbon atoms or a benzyl group and R.sub.3 represents a C.sub.3-7 alkyl group or a C.sub.3-7 cycloalkyl group) are prepared by reacting an .alpha.-ketoester of the formula (II) ##STR2## (in which Alk represents an alkyl group) or a precursor thereof with a compound of the formula (III) ##STR3## The precursor of the compound of formula (II) may be a mixture of isomeric enol esters ##STR4## The compounds of formula (I) may be converted into compounds of formula VIII ##STR5## in which R.sub.1 and R.sub.2 which may be the same or different represent hydrogen or a straight or branched chain alkyl group containing from 1 to 4 carbon atoms, and R.sub.3 is as defined above.