Cholinergic enhancers with improved blood-brain barrier permeability for the treatment of diseases accompanied by cognitive impairment
申请人:Galantos Pharma GmbH
公开号:EP1777222A1
公开(公告)日:2007-04-25
The present invention refers to compounds that, in addition to enhancing the sensitivity to acetylcholine and choline of neuronal cholinergic receptors and/or acting as chvlinesterase inhibitors and/or neuroprotective agents, have enhanced blood-brain barrier permeability in comparison to their parent compounds. The compounds are derived (either formally by their chemical structure or directly by chemical synthesis) from natural compounds belonging to the class of amaryllidaceae alkaloids e.g. galanthamine, narwedine and lyeoramine, or from metabolites of said compounds. The compounds of the present invention can either interact as such with their target molecules, or they can act as "prodrugs", in the sense that after reaching their target regions in the body they are converted by hydrolysis or enzymatic attack to the original parent compound and react as such with their target molecules, or both. The compounds of this invention may be used as medicaments for the treatment of human brain diseases associated with a cholinergic deficit, including the neurodegenerative diseases Alzheimer's and Parkinson's disease and the psychiatric diseases vascular dementia, schizophrenia and epilepsy.
BENZAZEPINE DERIVATIVES, MEDICAMENTS CONTAINING THE SAME AND THEIR USE TO PREPARE MEDICAMENTS
申请人:——
公开号:US20030092700A1
公开(公告)日:2003-05-15
New derivatives of benzazepine, particularly of benzofuro[3a,3,2,ef][2]benzazepin of the general formula (I)
1
and new compounds of the general formula (III)
2
Drugs, containing compounds of formulas (I) and/or (III), which can be used successfully for the treatment of Alzheimer's disease and related dementia conditions, as well as for the treatment of Langdon-Down syndrome, are also described.
Galanthamine N-oxide 2 undergoes a Polonovski-Potier reaction to give the iminium salt 5 and the unexpected 8-hydroxygalanthamine 3. An intramolecular oxygen transfer is proposed to explain hydroxylation of the aromatic nucleus.
Facile synthesis of (±)-, (+)-, and (-)-galanthamine
作者:Jerzy Szewczyk、Joseph W. Wilson、Anita H. Lewin、F. Ivy Carroll
DOI:10.1002/jhet.5570320132
日期:1995.1
evaluated as a potential agent for the treatment of Alzheimer's disease. We report a very efficent synthesis of (±)-galanthamine [(±)-1a] from readily available isovanillin and tyramine. We have separated racemic galanthamine into its diastereoisomeric (1S)-camphanate esters and obtained both natural (-)- and unnatural (+)-galanthamine by lithium aluminum hydride removal of the acyl group.
[DE] NEUE BENZAZEPINDERIVATE, DIESE ENTHALTENDE ARZNEIMITTEL UND VERWENDUNG DERSELBEN ZUM HERSTELLEN VON ARZNEIMITTELN<br/>[EN] NEW BENZAZEPINE DERIVATIVES, MEDICAMENTS CONTAINING THE SAME AND THEIR USE TO PREPARE MEDICAMENTS<br/>[FR] DERIVES DE BENZAZEPINE, MEDICAMENTS CONTENANT CES DERIVES ET LEUR UTILISATION POUR PRODUIRE DES MEDICAMENTS
申请人:SANOCHEMIA LTD.
公开号:WO1997040049A1
公开(公告)日:1997-10-30
(DE) Neue Derivate des Benzazepins, insbesondere des Benzofuro[3a,3,2,ef][2]benzazepins der allgemeinen Formel (I) und neue Verbindungen der allgemeinen Formel (III). Beschrieben werden auch Arzneimittel enthaltend Verbindungen der Formeln (I) und/oder (III), die zur Behandlung der Alzheimer'schen Krankheit und verwandter Demenzzustände, sowie für die Behandlung des Langdon-Down-Syndroms erfolgreich eingesetzt werden können.(EN) New derivatives of benzazepine are disclosed, in particular of benzofuro[3a,3,2,ef][2]benzazepine, having the general formula (I), as well as new compounds of general formula (III). Also disclosed are medicaments which contain compounds of formulas (I) and/or (III) and may be successfully used for treating Alzheimer disease and related demential states, as well as the Langdon-Down syndrome.(FR) L'invention concerne de nouveaux dérivés de benzazépine, notamment de la benzofuro[3a,3,2,ef][2]benzazépine, qui répondent à la formula générale (I), et de nouveaux composés de formule générale (III), ainsi que des médicaments qui contiennent des composés des formules (I) et/ou (III) et peuvent être utilisés avec succès pour traiter la maladie d'Alzheimer et les états de démence apparentés, ainsi que le syndrome de Langdon-Down.