Pharmaceutical intermediates:
1. Used as a key intermediate for the synthesis of central nervous system (CNS) drugs, such as antidepressants, antipsychotics, or analgesics.
2. Active molecules that may participate in the construction of pyridine ring structures (such as certain drugs targeting GPCR receptors).

Organic synthesis:
1. amide bond construction: used for synthesizing amide fragments in complex molecules or as protective groups.
2. Chiral synthesis: Piperidine rings can serve as chiral adjuvants or ligands (such as in metal catalyzed reactions).