[EN] NEW PROCESS FOR THE SYNTHESIS OF TAPENTADOL AND INTERMEDIATES THEREOF<br/>[FR] NOUVEAU PROCÉDÉ POUR LA SYNTHÈSE DE TAPENTADOL ET SES INTERMÉDIAIRES
申请人:ARCHIMICA SRL
公开号:WO2012001571A1
公开(公告)日:2012-01-05
The object of the present invention is a new process for the synthesis of tapentadol, both as free base and in hydrochloride form, which comprises the step of alkylation of the ketone (VII) to yield the compound (VIII), as reported in Diagram 1, with high stereoselectivity due to the presence of the benzyl group as substituent of the amino group. It was surprisingly found that this substitution shifts the keto-enol equilibrium towards the desired enantiomer and amplifies the capacity of the stereocenter present in the compound (VII) to orient the nucleophilic addition of the organometallic compound at the carbonyl towards the desired stereoisomer. This substitution thus allows obtaining a considerable increase of the yields in this step, and consequently allows significantly increasing the overall yield of the entire tapentadol synthesis process. A further object of the present invention is constituted by the tapentadol free base in solid form, obtainable by means of the process of the invention. Still another object of the invention is represented by the crystalline forms I and II of the tapentadol free base. A further object of the present invention is the mixture of the crystalline forms I and II of the tapentadol free base.
[EN] NEW PROCESS FOR THE PREPARATION OF TAPENTADOL AND INTERMEDIATES THEREOF<br/>[FR] NOUVEAU PROCÉDÉ DE PRÉPARATION DE TAPENTADOL ET DE SES INTERMÉDIAIRES
申请人:ARCHIMICA SRL
公开号:WO2011067714A1
公开(公告)日:2011-06-09
The present invention refers to a new process for the synthesis of tapentadol comprising the quantitative resolution of the racemic mixture (V) to obtain the stereoisomer of (S)-3-(dimethylamino)-2-methyl-l-(3-nitrophenyl)-propan-l-one (VII) according to the Scheme 2 below (V, VI, VII) Scheme 2 using the (2R,3R)-O,O'-dibenzoyltartaric chiral acid wherein said resolution is quantitative. The present invention also refers to some intermediate compounds of the new synthesis process of tapentadol.
Method for the preparation of 1-aryl-1-alkyl-3-dialkylaminopropane compounds
申请人:Siegfried AG
公开号:EP2674414A1
公开(公告)日:2013-12-18
The present invention refers to the preparation of 1-aryl-1-alkyl-2-alkyl-3-dialkylamino-propane compounds, such as tapentadol, using a diastereoselective Eschenmoser-Claisen or Ireland-Claisen rearrangement.
[EN] METHOD FOR THE PREPARATION OF 1-ARYL-1-ALKYL-2-ALKYL-3-DIALKYLAMINOPROPANE COMPOUNDS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE COMPOSÉS 1-ARYL-1-ALKYL-2-ALKYL-3-DIALKYLAMINO-PROPANE
申请人:SIEGFRIED AG
公开号:WO2013185928A1
公开(公告)日:2013-12-19
The present invention refers to the preparation of 1-aryl-1-alkyl-2-alkyl-3-dialkylamino-propane compounds, such as tapentadol, using a diastereoselective Eschenmoser-Claisen or Ireland-Claisen rearrangement.
PROCESS FOR THE SYNTHESIS OF TAPENTADOL AND INTERMEDIATES THEREOF
申请人:Motta Giuseppe
公开号:US20130178644A1
公开(公告)日:2013-07-11
The object of the present invention is a new process for the synthesis of tapentadol, both as free base and in hydrochloride form, which comprises the step of alkylation of the ketone (VII) to yield the compound (VIII), as reported in Diagram 1, with high stereoselectivity due to the presence of the benzyl group as substituent of the amino group. It was surprisingly found that this substitution shifts the keto-enol equilibrium towards the desired enantiomer and amplifies the capacity of the stereocenter present in the compound (VII) to orient the nucleophilic addition of the organometallic compound at the carbonyl towards the desired stereoisomer. This substitution thus allows obtaining a considerable increase of the yields in this step, and consequently allows significantly increasing the overall yield of the entire tapentadol synthesis process.
A further object of the present invention is constituted by the tapentadol free base in solid form, obtainable by means of the process of the invention.
Still another object of the invention is represented by the crystalline forms I and II of the tapentadol free base.
A further object of the present invention is the mixture of the crystalline forms I and II of the tapentadol free base.