Pyrazole refers both to the class of simple aromatic ring organic compounds of the heterocyclic series characterized by a 5-membered ring structure composed of three carbon atoms and two nitrogen atoms in adjacent positions and to the unsubstituted parent compound. Being so composed and having pharmacological effects on humans, they are classified as alkaloids although they are not known to occur in nature.

Pyrazoles are produced synthetically through the reaction of α,β-unsaturated aldehydes with hydrazine and subsequent dehydrogenation.

Pyrazoles are used for their analgesic, anti-inflammatory, antipyretic, antiarrhythmic, tranquilizing, muscle relaxing, psychoanaleptic, anticonvulsant, monoamineoxidase inhibiting, antidiabetic and antibacterial activities.

Structurally related compounds are pyrazoline and pyrazolidine.

See also

• Benzimidazole, an imidazole analog with a fused benzene ring.
• Pyrrole, an analog with only one nitrogen atom in position 1.
• Oxazole, an analog with the nitrogen atom in position 1 replaced by oxygen.
• Imidazole, an analog with two non-adjacent nitrogen atoms.
• Simple aromatic rings

External links

pyrazoles | simple aromatic rings | heterocyclic compounds

Pyrazol | ピラゾール