4-Piperidinecarboxylic acid is an organic intermediate that can be prepared by reducing 4-pyridinecarboxylic acid. It has been reported in the literature that 4-piperidinecarboxylic acid can be used to prepare methyl 4-piperidineacetate, and methyl 4Chemicalbook-piperidineacetate is an important piperidine derivative drug intermediate, mainly used in the synthesis of drugs for a variety of neurological diseases, such as convulsions, antiepileptic, sedation, etc.