Piperidine → 1-(5-Cyano-2-pyridinyl)-4-piperidinecarboxylic acid

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Reaction Steps

In analogy to the procedure described for the synthesis of 4-{(3S,4S)-3-(4-Chloro-phenyl)-4-[(S)-1-(3,4-dichloro-phenoxy)-ethyl]-piperidine-1-carbonyl}-3,4,5,6-tetrahydro-2H-[1,2′]bipyridinyl-5′-carbonitrile (example 49) the respective piperidine derivative was prepared from (R)-1-[(3S,4S)-1-Benzyl-3-(4-chloro-phenyl)-piperidin-4-yl]-ethanol and 4-trifluoromethyl-phenol via Mitsunobu reaction and subsequently the benzyl group was cleaved by treatment with 1-chloroethyl-chloroformate, DIPEA and methanol. Coupling with 5′-Cyano-3,4,5,6-tetrahydro-2H-[1,2′]bipyridinyl-4-carboxylic acid (commercially available) yielded the title compound as viscous yellow oil. MS (m/e): 597.4 [(M+H)+].

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