piperidinen.
/pᵻˈpɛrᵻdiːn/, /pᵻˈpɛrᵻdɪn/, /pʌɪˈpɛrᵻdiːn/, /pʌɪˈpɛrᵻdɪn/, U.S. /pəˈpɛrəˌdin/, /paɪˈpɛrəˌdin/, /paɪˈpɛrəd(ə)n/, /pəˈpɛrəd(ə)n/ Chemistry.
A strongly basic liquid with an unpleasant odour whose molecule is a saturated six-membered ring, (CH2)5NH.
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the world > matter > chemistry > organic chemistry > organic compounds > [noun] > heterocyclic compounds > other heterocyclic compounds
alloxan1839
piperidine1854
valerin1866
acridine1870
piperidia1871
kairoline1883
quinoxaline1884
pyrimidine1885
pyrazolone1887
quinazoline1887
pyrazine1888
acridone1892
phthalazine1893
pyridazine1894
nitron1906
pyrrolizidine1939
1854 Jrnl. Chem. Soc. 6 175 (heading) On piperidine, a new alkali derived from piperine.
1881 H. Watts Dict. Chem. VIII. 1699 R. Buchheim..obtained a crystalline substance, pyrethrin, which melted at the heat of the body, and was resolved by alcoholic potash into pyrethric acid and piperidine.
1938 G. H. Richter Textbk. Org. Chem. xvi. 289 The reaction takes place in the presence of primary and secondary amines, especially diethylamine or piperidine.
1964 N. G. Clark Mod. Org. Chem. xxiii. 470 On heating a pyridine solution of the aldehyde with malonic acid in presence of piperidine (catalyst), condensation and decarboxylation occur, and a cinnamic acid is produced.
1990 Independent 5 Feb. 15/3 Piperidine is an integral part of Angel Dust, more correctly known as phencyclidine.
This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).
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n.1854