4- and 6-carbamates related to physostigmine and intermediates for the preparation thereof
US5260452A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1991 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | Sep 3, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D209/34
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to 4- and 6-carbamates related to physostigmine of the formula ##STR1## where R.sub.1 is alkyl, cycloalkyl, bicycloalkyl, aryl or arylloweralkyl; R.sub.2 is hydrogen or alkyl or the group --NR.sub.1 R.sub.2 taken together forms a monocyclic or bicyclic ring of 5 to 12 carbons; m is 0,1, or 2; each X is independently hydrogen, halogen, loweralkyl, nitro or amino; and the pharmaceutically acceptable acid addition salts thereof, and where applicable, the geometric and optical isomers and racemic mixtures thereof. This invention also relates to novel intermediates useful in the preparation of the 4- and 6-carbamates. The compounds of this invention display utility for alleviating various memory dysfunctions characterized by a decreased cholinergic function, such as Alzheimer's disease.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.