Process for obtaining 3, 3-diphenylpropylamines
US8722920B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jul 26, 2010 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Jan 15, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C213/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for obtaining 3,3-diphenylpropylamines of general formula (I), particularly Fesoterodine, as well as their enantiomers, solvates and salts, comprising a chemoselective reduction of the acid group against the ester group in compounds of general formula (V), wherein R1 is C1-C8 alkyl; and R3 and R4, independently of one another, represent H or C1-C8 alkyl, or together form a ring of 3 to 7 members with the nitrogen to which they are bound. The invention also relates to the compounds of formula (V), as well as their enantiomers, solvates and salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.