METHOD FOR THE PREPARATION OF (R)-TOLTERODINE TARTRATE

The invention relates to a method for the preparation of (R)-tolterodine tartrate, comprising the following steps in which: a benzopyranone having formula 1 is reduced with sodium borohydride in order to form a dialcohol having formula 12; the hydroxyl groups of the dialcohol are reacted with mesyl...

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Bibliographic Details
Main Authors FLORES SANCHEZ, PATRICIA, AVILA QUEVEDO, SALVADOR ADRIAN
Format Patent
LanguageEnglish
French
Spanish
Published 21.02.2008
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Summary:The invention relates to a method for the preparation of (R)-tolterodine tartrate, comprising the following steps in which: a benzopyranone having formula 1 is reduced with sodium borohydride in order to form a dialcohol having formula 12; the hydroxyl groups of the dialcohol are reacted with mesyl chloride in order to introduce two methanesulphonyl groups and to form a dimesylated compound having formula 13; the dimesylated compound is reacted with diisopropylamine under pressure and, subsequently, with sodium hydroxide in order to obtain tolterodine which is isolated in the form of the corresponding hydrobromide having formula 14; the base tolterodine is released from the hydrobromide; and the tolterodine is reacted with (+)-tartaric acid in order to prepare the (R)-tolterodine tartrate. Procedim iento para la preparación de tartato de (R)-tolterod ina. Un procedimiento para Ia producción de tartrato de (R)-tolterodína q ue comprende : reducir una benzopiranona, de fórmul a 1, con boroh idruro de sodio para formar un dialcohol, de fórmula 12; reaccionar los grupos hidroxilos del dialcohol con cloruro de mesilo para introducir dos grupos de metansulfonilo y formar un compuesto dimesilado, de fórmula 13; reaccionar el compuesto dimesilado, con diisopropilamina bajo presión, y posteriormente con hidróxido de sodio para obtener tolterodina aislándola como el correspondiente bromhidrato, de fórmula 14; liberata tolterdina base a partir del bromhidrato, y reaccionar poste riormente Ia misma con ácido (+)-tartárico para preparar el tartrato de (R)- Tolterodina. Un procédé de préparation de tartrate de (R)-tolterodine qui comprend la réduction d'une benzopyranone de formule 1 avec du borohydrure de sodium afin d'obtenir un dialcool de formule 12; la réaction des groupes hydroxyle du dialcool avec du chlorure de mésyle afin d'introduire deux groupes de méthane sulfonyle et former un composé dimésylé avec un di-isopropylamine sous pression, puis avec un hydroxyde de sodium afin d'obtenir une tolterodine de base à partir du brome hydrate et la réaction ultérieure de celle-ci avec un acide (+)- tartarique afin d'obtenir le tartrate de (R)-tolterodine.
Bibliography:Application Number: WO2007IB03377