Method for determining enantiomeric purity of darifenacin...

C - Chemistry – Metallurgy – 07 – D

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C07D 405/06 (2006.01) C07D 207/04 (2006.01) G01N 30/02 (2006.01) B01J 20/285 (2006.01) C07B 57/00 (2006.01)

Patent

CA 2691239

The present invention relates to a method for differentiating and quantifying the enantiomers, thereby determining the enantiomeric purity, of darifenacin and its intermediate compounds and salts thereof. In addition, the invention relates to a method for differentiating and quantifying the enantiomers, thereby determining the enantiomeric purity of compounds of formula (I): wherein Y is hydrogen or a substituent of the formula (II): including the differentiation and quantification of compounds of formula (I) of varying enantiomeric purity from their corresponding enantiomers. The invention further relates to a process for preparing enantiomerically pure darifenacin using enantiomerically pure starting compounds which have been previously differentiated and quantified according to the method of the invention.

La présente invention porte sur un procédé de différenciation et de quantification des énantiomères, permettant ainsi la détermination de la pureté énantiomérique de la darifénacine et de ses composés intermédiaires et de leurs sels. De plus, l'invention porte sur un procédé de différenciation et de quantification des énantiomères, permettant ainsi la détermination de la pureté énantiomérique de composés de formule (I): dans laquelle Y est l'hydrogène ou un substituant de formule (II): comprenant la différenciation et la quantification de composés de formule (I) de pureté énantiomérique variable à partir de leurs énantiomères correspondants. L'invention porte en outre sur un procédé de préparation de la darifénacine énantiomériquement pure à l'aide de composés de départ énantiomériquement purs qui ont été préalablement différenciés et quantifiés selon le procédé de l'invention.

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