piperidine

/pi-per-i-deen, -din, pahy-, pip-er-i-/US // pɪˈpɛr ɪˌdin, -dɪn, paɪ-, ˈpɪp ər ɪ- //UK // (pɪˈpɛrɪˌdiːn, -dɪn) //

哌啶,哌啶类,哌嗪,哌啶酮

Definitions

n.名词 noun

1
Chemistry.
- : a colorless, water-soluble liquid, C5H11N, obtained from the alkaloid piperine or from pyridine: used chiefly as a solvent.

We may take piperidine and coniine as examples of the methods followed in alkaloidal synthesis; these are pyridine bases.
Pentamethylinediamine is the principal intermediary product, and this gives piperidine when distilled with superheated steam.
If we introduce six hydrogen atoms into pyridine, we convert it into piperidine.
Piperidine hydrochlorate, also, when heated with excess of bromine to 180° C., yields dibrompyridine.