Canadian Medical Guide > Chemicals and Drugs > Heterocyclic Compounds > Heterocyclic Compounds, 1-Ring Terms and Definitions

Heterocyclic Compounds, 1-Ring

Medical Definition:	A class of organic compounds containing a ring structure made up of more than one kind of atom, usually carbon plus another atom. The ring structure can be aromatic or nonaromatic.
Guide Notes:	GEN; prefer specifics; used for mapping supplementary chemicals

Heterocyclic Compounds, 1-Ring Categories.

	Azepines
	Azetines
	Azirines
	Azocines
	Azoles
	Dioxins - Chlorinated hydrocarbons containing heteroatoms that are present as contaminants of herbicides. Dioxins are carcinogenic, teratogenic, and mutagenic. They have been banned from use by the FDA.
	Dioxoles
	Furans - Compounds with a 5-membered ring of four carbons and an oxygen. They are aromatic heterocycles. The reduced form is tetrahydrofuran.
	Imidazoles
	Oxathiins
	Oxazines
	Oxazoles - Five-membered heterocyclic ring structures containing an oxygen in the 1-position and a nitrogen in the 3-position.
	Piperazines
	Piperidines - A family of hexahydropyridines. Piperidine itself is found in the pepper plant as the alkaloid piperine.
	Pyrans
	Pyrazines
	Pyrazoles
	Pyridazines
	Pyridines
	Pyrimidines - A family of 6-membered heterocyclic compounds occurring in nature in a wide variety of forms. They include several nucleic acid constituents (CYTOSINE; THYMINE; and URACIL) and form the basic structure of the barbiturates.
	Pyrroles
	Pyrrolidines
	Thiazines
	Thiazoles
	Thiepins
	Thiophenes
	Triazines

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