Ring forming reaction

Short description: Type of reaction in organic chemistry

A ring forming reaction or ring-closing reaction in organic chemistry is an umbrella term for a variety of reactions that introduce one or more rings into a molecule. A heterocycle forming reaction is a reaction that introduces a new heterocycle.[1][2] Important classes of ring forming reactions include annulations[3] and cycloadditions. Heterocyclic compounds are useful in spectroscopic identification of compounds, purity criteria, and investigating the molecular electronic structures.[4]

## Contents

* 1 Named ring forming reactions
* 2 See also
* 3 References
* 4 Further reading

## Named ring forming reactions

Named ring forming reactions include (not exhaustive):

* Azide-alkyne Huisgen cycloaddition
* Bischler–Napieralski reaction
* Bucherer carbazole synthesis
* Danheiser annulation
* Dieckmann condensation
* Diels–Alder reaction
* Feist–Benary synthesis
* Fiesselmann thiophene synthesis
* Fischer indole synthesis
* Gewald reaction
* Hantzsch pyridine synthesis
* Larock indole synthesis
* Paal–Knorr synthesis
* Pictet–Spengler reaction
* Pomeranz–Fritsch reaction
* Ring-closing metathesis
* Robinson annulation
* Skraup reaction

## See also

* Ring-closing reactions in Cyclic compound

## References

1. ↑ IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version:  (1995) "Heterocyclic compounds". doi:10.1351/goldbook.H02798
2. ↑ Template:Katritzky2nd
3. ↑ IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version:  (2006-) "annulation". doi:10.1351/goldbook.A00367
4. ↑ "Heterocyclic compound - Melting, Boiling, Points | Britannica" (in en). 2024-09-02. https://www.britannica.com/science/heterocyclic-compound/Melting-and-boiling-points#ref1004814.

## Further reading

* Michael B. Smith & Jerry March, 2007, "March's Advanced Organic Chemistry: Reactions, Mechanisms, and Structure," 6th Ed., New York, NY, USA:Wiley & Sons, ISBN 0470084944, see [1], accessed 19 June 2015.
* László Kürti & Barbara Czakó, 2005, "Strategic Applications of Named Reactions in Organic Synthesis: Background and Detailed Mechanisms, Amsterdam, NH, NLD:Elsevier Academic Press, 2005ISBN 0124297854, see [2], accessed 19 June 2015.

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