Drug intermediates:
1. Used for synthesizing central nervous system (CNS) drugs, such as antidepressants, anxiolytics, or analgesics (which regulate receptor activity through pyridine ring structure).
2. Participate in the construction of active fragments of antipsychotic drugs (such as dopamine or 5-HT receptor modulators).
3. As a molecular backbone in anti-cancer drug design (such as a precursor for kinase inhibitors or topoisomerase inhibitors).

Organic synthesis:
1. Introduction of amide bonds: As a substrate for amidation reactions, it is used to synthesize more complex molecules containing pyridine rings.
2. Chiral synthesis: Piperidine rings can be used as chiral adjuvants for asymmetric catalytic reactions.