Process for obtaining cizolirtine and its enantiomers
申请人:LABORATORIOS DEL DR. ESTEVE, S.A.
公开号:EP1671953A1
公开(公告)日:2006-06-21
A process is described for the preparation of a precursor alcohol of Cizolirtine, (±)-2-[phenyl(1-methyl-1H-pyrazol-5-yl)methoxy]-N,N-dimethylethanamine and its enantiomers, it comprises the asymmetric addition of a metalated phenyl reagent to an pyrazolcarbaldehyde in the presence of a chiral ligand to render chiral alcohols. The chiral alcohols are further O-alkylated to render Cizolirtine or its enantiomers.
[EN] METHYL-1H-PYRAZOLE ALKYLAMINE COMPOUNDS HAVING MULTIMODAL ACTIVITY AGAINST PAIN<br/>[FR] COMPOSÉS MÉTHYL-1H-PYRAZOLE-ALKYLAMINES AYANT UNE ACTIVITÉ MULTIMODALE CONTRE LA DOULEUR
申请人:ESTEVE LABOR DR
公开号:WO2016096127A1
公开(公告)日:2016-06-23
The present invention relates to compounds having dual pharmacological activity towards both the sigma (σ) receptor, and the μ-opiod receptor and more particularly to methyl-1H-pyrazole alkylamine compounds having this pharmacological activity, to processes of preparation of such compounds, to pharmaceutical compositions comprising them, and to their use in therapy, in particular for the treatment of pain.
[EN] METHOD FOR SEPARATING CARBINOLS<br/>[FR] PROCEDE DE SEPARATION DE CARBINOLS
申请人:LABORATORIOS DEL DR. ESTEVE, S.A.
公开号:WO1997020817A1
公开(公告)日:1997-06-12
(EN) A method for predominantly preparing the enantiomer (R)-(+)-5-(phenyl)hydroxymethyl-1-methyl-1H-pyrazole, (R)-(+)-1, by separating the racemate (+)-5-(phenyl)hydroxymethyl-1-methyl-1H-pyrazole of formula (1), comprising the series of steps of using a lipase or material derived therefrom having enzymatic activity in a transesterification reaction, as well as hydrolysing the resulting ester, (S)-(-)-5-(phenyl)alkylcarbonyloxymethyl-1-methyl-1H-pyrazole, of formula (S)-(-)-4, wherein R1 is a methyl or ethyl radical.(FR) La présente invention concerne un procédé pour préparer de façon prédominante l'énantiomère (R)-(+)-5-(phényl)hydroxyméthyl-1-méthyl-1H-pyrazole, (R)-(+)-1, par séparation du mélange racémique (+)-5-(phényl)hydroxyméthyl-1-méthyl-1H-pyrazole, de formule (1), qui se caractérise par un procédé séquentiel qui comprend l'utilisation d'une lipase ou d'une matière dérivée de celle-ci possédant une activité enzymatique en une réaction de transestérification, ainsi que l'hydrolyse de l'ester formé, (S)-(-)-5-(phényl)alkylcarbonyloxyméthyl-1-méthyl-1H-pyrazole, de formule (S)-(-)-4 dans laquelle R1 représente un radical méthyle ou éthyle.
The procedure comprises (a) the enantioselective reduction of a pro-chiral ketone (III) by using a reducing and agent and chiral catalyst, both boron derivatives, in an anhydrous solvent or mixture of anhydrous solvents to form an enantiomer of an alcohol (II), and (b), the alkylation of (II), in phase transfer conditions, with optionally prior isolation and purification thereof, with 2-chloro-N,N-dimethylethylamine, to form an enantiomer of (I). Cyzolirtine exhibits analgesic properties.
A process is described for the preparation of a precursor alcohol of Cizolirtine, (±)-2-[phenyl(1-methyl-1H-pyrazol-5-yl)methoxy]-N,N-dimethylethanamine and its enantiomers, it comprises the asymmetric reduction of a prochiral ketone in the presence of a chiral ruthenium (II) catalyst system comprising at least a bidentate phosphorous-containing ligand and a diamine ligand to render chiral alcohols. The chiral alcohols are further O-alkylated to render the corresponding pharmaceutically active ethanamines.