Process for preparing pure enantiomers of tropic acid esters
US5952505A · kind A · utility
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Key dates
| Filing date | Nov 19, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Nov 19, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D451/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Precursors of anticholinergically active quaternary compounds can be synthesized from optically active tropic acid by acetylation, conversion into the acid chloride, reaction with amino alcohols of formula (I) ##STR1## (as the methanesulphonate; Q and R are explained in the specification), deacetylation and isolation of the reaction product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.