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Tricyclic

Organic compound having 3 fused rings

Tricyclic
Summary

Organic compound having 3 fused rings

[[Dibenzazepine
[[Phenothiazine

Tricyclics are cyclic chemical compounds that contain three fused rings of atoms.

Many compounds have a tricyclic structure, but in pharmacology, the term has traditionally been reserved to describe heterocyclic drugs. They include antidepressants, antipsychotics, anticonvulsants, and antihistamines (as antiallergens, anti-motion sickness drugs, antipruritics, and hypnotics/sedatives) of the dibenzazepine, dibenzocycloheptene, dibenzothiazepine, dibenzothiepin, phenothiazine, and thioxanthene chemical classes, and others.

History

  • Promethazine and other first generation antihistamines with a tricyclic structure were discovered in the 1940s.
  • Chlorpromazine, derived from promethazine originally as a sedative, was found to have neuroleptic properties in the early 1950s, and was the first typical antipsychotic.
  • Imipramine, originally investigated as an antipsychotic, was discovered in the early 1950s, and was the first tricyclic antidepressant.
  • Carbamazepine was discovered in 1953, and was subsequently introduced as an anticonvulsant in 1965.
  • Clozapine, a derivative of imipramine, was synthesized in 1958 and entered the European market in 1972 under the name Leponex.
  • Antidepressants with a tetracyclic structure such as mianserin and maprotiline were first developed in the 1970s as tetracyclic antidepressants.
  • Loratadine was introduced as a non-sedating second generation antihistamine in the 1990s.{{Cite journal

References

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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