Racemic and optically active octahydro-indolo(2,3-a) tetrahydropyranyl (2,3-c) quinolizine diester derivatives and process for preparing the same
US5122607A · kind A · utility
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9Claims
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Key dates
| Filing date | Jun 21, 1990 |
| Grant date | Jun 16, 1992 |
| Priority date | — |
| Expiry date | Jun 21, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D461/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New intermediate compounds are disclosed of the formula I, ##STR1## wherein R.sub.1 and R.sub.2 are independently alkyl having 1 to 4 carbon atoms, or acid-addition salts thereof of formula Ib, ##STR2## wherein X represents an acid residue, and a process for the preparation of the intermediate compounds.
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