Piperidine derivatives and process for their production
US5750703A · kind A · utility
25Cited by
22References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1995 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Feb 2, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for preparation of substantially pure piperidine derivative compounds of the formulae: ##STR1## wherein R.sub.1 is hydrogen or hydroxy; PA1 R.sub.2 is hydrogen; or R.sub.1 and R.sub.2 taken together form a second bond between the carbon atoms bearing R.sub.1 and R.sub.2 ; PA2 R.sub.3 is --COOH or --COOR.sub.4 ; PA1 R.sub.4 has 1 to 6 carbon atoms; PA1 A, B, and D are the substituents of their respective rings each of which may be different or the same and are hydrogen, halogens, alkyl, hydroxy, alkoxy, or other substituents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.