Preparation of piperidinylcyclopentylheptenoic acid derivatives

Details Preparation of piperidinylcyclopentylheptenoic acid derivatives Preparation of piperidinylcyclopentylheptenoic acid derivatives

C - Chemistry, Metallurgy

07

D

260/235.03

C07D 295/14 (2006.01) C07D 295/155 (2006.01)

Patent

CA 1292471

ABSTRACT Preparation of piperidinylcyclopentylheptenoic acid derivatives A process is described for the preparation of a compound of formula (2) Image (2) (wherein R is a C1-6 alkyl or a C7-20 aralkyl group) and the salts thereof, which comprises reducing a compound of formula (3) Image (3) (or a salt thereof), using a reducing system comprising borohydride ions and metal ions selected from lanthanide ions, alkaline earth metal ions or yttrium ions in solution. The reduction system may be provided by a borohydride (e.g. NaBH4) and a metal salt (e.g. CeC13). The ester (2) may then if desired be hydrolyzed to give the parent acid.

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