Definition

1. Noun:
   • A heterocyclic organic compound: "imidazole" is a white or colorless crystalline solid with the chemical formula C₃H₄N₂. It is a five-membered ring containing two non-adjacent nitrogen atoms.
   • A class of compounds and a functional group: The term also refers to the class of compounds containing this ring structure, which is a fundamental building block in many important biological molecules.
   • A histamine inhibitor: Some derivatives of imidazole are used in pharmaceuticals to inhibit the action of histamine.

Usage Examples

• Noun:
  • The structure of imidazole is important in biochemistry.
  • Histidine, an essential amino acid, contains an imidazole ring in its side chain.
  • The drug uses an imidazole derivative to achieve its therapeutic effect.

Advanced Usage

• In medicinal chemistry: The imidazole ring is a common pharmacophore, a part of a molecular structure responsible for a drug's activity.
  • Many antifungal agents, such as ketoconazole, are based on the imidazole scaffold.
• In coordination chemistry: Imidazole can act as a ligand, binding to metal ions.
  • The imidazole group in a histidine residue often coordinates with zinc in enzyme active sites.

Variants and Related Words

• Imidazolate (n): The conjugate base of imidazole, often involved in chemical reactions.
• Imidazolium (n): A cation derived from imidazole, commonly found in ionic liquids.
• Benzimidazole (n): A bicyclic compound consisting of a benzene ring fused to an imidazole ring.

Synonyms

• 1,3-diazole: A systematic chemical name for imidazole, indicating the positions of the nitrogen atoms in the ring.
• Glyoxaline: An older, now less common name for imidazole.

Related Phrases and Concepts

• Imidazole alkaloids: A class of naturally occurring compounds containing the imidazole nucleus.
• Imidazole-containing drugs: A broad category of pharmaceuticals, including antifungals, antihistamines, and proton-pump inhibitors.

Noun

1. an organic base C3H4N2; a histamine inhibitor