Thiazole

Thiazole is a chemical compound made of carbon, sulfur, nitrogen, and hydrogen. It has the chemical formula . The thiazoles are a family of compounds where the hydrogen atoms of thiazole are replaced by other functional groups.

 Thiazolium 
The nitrogen atom in thiazole is a weak base. It can be alkylated to make a type of quaternary ammonium cation (ion where nitrogen has four chemical bonds) called thiazolium.

The essential nutrient thiamine is a thiazolium cation. Other thiazolium salts are used as catalysts in some chemical reactions.

 Sources 

Category:Azoles
Category:Sulfur heterocycles