Piperidine derivatives and process for their production

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

C - Chemistry, Metallurgy

07

D

C07D 211/22 (2006.01) A61K 31/445 (2006.01) C07C 59/76 (2006.01) C07C 69/738 (2006.01) C07D 211/70 (2006.01)

Patent

CA 2181089

The present invention relates to substantially pure piperidine derivative compounds as shown below, wherein R1 is hydrogen or hydroxy; R2 is hydrogen; or R1 and R2 taken together form a second bond between the carbon atoms bearing R1 and R2; R3 is -COOH or -COOH4; R4 is an alkyl with 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. (see formula I) or (see formula II)

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