Indoles
US4105777A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1977 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Jan 12, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P25/06
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Indoles of the formula ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen, halogen, --CF.sub.3, alkyl of 1 to 8 carbon atoms and alkoxy of 1 to 8 carbon atoms, R.sub.2 is in the 2,3 or 4 position and is selected from the group consisting of halogen, --CF.sub.3 and alkyl, alkoxy and alkylthio of 1 to 8 carbon atoms, A is selected from the group consisting of branched alkylene of 3 to 5 carbon atoms and --(CH.sub.2).sub.n -- and n is a number of 2 to 5 and R.sub.3 and R.sub.4 are alkyl of 1 to 8 carbon atoms or taken together with the nitrogen atom form a heterocyclic ring selected from the group consisting of piperidinyl, pyrrolidinyl, morpholinyl, piperazinyl and N-alkyl piperazinyl with 1 to 4 alkyl carbon atoms and their non-toxic, pharmaceutically acceptable acid addition salts having analgesic activity and their preparation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.