- Process for the preparation of N,N-diisopropyl-3-(2-hydroxy-5-methylphenyl)- 3-phenyl propylamine and its salts starting from a novel intermediate
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The invention concerns an improved process for the preparation of tolterodine (N,N-diisopropyl-3-(2-hydroxy-5-methylphenyl)-3-phenyl propylamine) and its salts, in particular for the preparation of the tartrate salt, and more in particular for the (+)-(R) enantiomer of tolterodine L-tartrate, starting from a novel intermediate, N,N-diisopropyl-3-(2-hydroxy-5-methylphenyl)-3-phenyl-2-propenamide which can be used as pure Z or E isomer or as a mixture of Z and E isomers.
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Page/Page column 9-10
(2012/07/28)
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- PROCESS FOR THE PREPARATION OF N,N-DIISOPROPYL-3-(2-HYDROXY-5-METHYLPHENYL)- 3-PHENYL PROPYLAMINE AND ITS SALTS STARTING FROM A NOVEL INTERMEDIATE
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The invention concerns an improved process for the preparation of tolterodine (N,N-diisopropyl-3-(2-hydroxy-5-methylphenyl)-3-phenyl propyl amine) and its salts, in particular for the preparation of the tartrate salt, and more particularly for the (+)-(R) enantiomer of tolterodine L-tartrate, starting from a novel intermediate, N,N-diisopropyl-3-(2-hydroxy-5-methylphenyl)-3- phenyl-2-propenamide, which can be used as pure Z or E isomer or as a mixture of Z and E isomers. When the target is the preparation of the enantiomer (R)-(+)-(N,N- diisopropyl-3-(2-hydroxy-5-methylphenyl)-3-phenylpropylamine) and diastereomeric crystallization of suitable compound is applied, the present invention covers also the use of racemisation of undesired (S)-(-)- (N,N-diisopropyl-3-(2-hydroxy-5-methylphenyl)-3 -phenyl propylamine) enantiomer and its recycle in the process.
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Page/Page column 19-20
(2012/08/07)
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- PROCESS FOR PREPARING TOLTERODINE AND THE L-TARTRATE THEREOF
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The present invention relates to a process for preparing tolterodine and the L-tartrate thereof. The preparation consists of the following steps: A) ammonolysis reaction between diisopropylamine and compound 2 (3,4-dihydro-6-methyl-4-phenyl-2H-benzopyran-
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Page/Page column 3-4
(2012/01/03)
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- Process for the preparation of tolterodine
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A novel process for the preparation of tolterodine, i.e. (R)-N,N-diisopropyl-3-(2-hydroxy-5-methylphenyl)-3-phenylpropanamine, in the racemic form, as well as intermediates useful for its preparation.
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Page/Page column 5
(2008/06/13)
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- A process for the preparation of tolterodine
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A novel process for the preparation of tolterodine (I), i.e. (R)-N,N-diisopropyI-3-(2-hydroxy-5-methylphenyl)-3-phenylpropanamine, in the racemic form, as well as intermediates useful for its preparation.
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Page/Page column 8
(2010/11/23)
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