How is (S)-1-(Pyrrolidin-3-yl)piperidine dihydrochloride (CAS: 917505-12-5) typically synthesized?

(S)-1-(Pyrrolidin-3-yl)piperidine dihydrochloride is typically synthesized via a multistep procedure involving the synthesis of the pyrrolidin-3-yl group, followed by coupling with piperidine. This process often involves the use of chiral auxiliary techniques to ensure the desired (S) stereochemistry. The reaction is typically carried out under mild conditions to achieve high yield and selectivity.