Piperidine derivatives and process for their production

Details Piperidine derivatives and process for their production Piperidine derivatives and process for their production

2008-06-24

2008-06-24

Chang, Celia (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S236000, C546S234000

Reexamination Certificate

active

07390906

ABSTRACT:
The present invention relates to substantially pure piperidine derivative compounds of the formulae:whereinR1is hydrogen or hydroxy;R2is hydrogen;or R1and R2taken together form a second bond between the carbon atoms bearing R1and R2;R3is —COOH or —COOR4;R4has 1 to 6 carbon atoms;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.A process of preparing such piperidine derivative compounds in substantially pure form is also disclosed.

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