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ring forming reaction wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 named ring forming reactions 2 see also 3 references 4 further reading toggle the table of contents ring forming reaction 4 languages deutsch فارسی 日本語 中文 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia 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 named ring forming reactions edit 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 edit ring closing reactions in cyclic compound references edit iupac compendium of chemical terminology 5th ed the gold book 2025 online version 1995 heterocyclic compounds doi 10 1351 goldbook h02798 katritzky a r pozharskii a f 2000 handbook of heterocyclic chemistry 2nd ed academic press isbn 0080429882 iupac compendium of chemical terminology 5th ed the gold book 2025 online version 2006 annulation doi 10 1351 goldbook a00367 heterocyclic compound melting boiling points britannica www britannica com 2024 09 02 retrieved 2024 10 05 further reading edit 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 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 accessed 19 june 2015 retrieved from https en wikipedia org w index php title ring_forming_reaction oldid 1335739220 categories chemical reactions ring forming reactions hidden categories articles with short description short description is different from wikidata this page was last edited on 30 january 2026 at 23 10 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents ring forming reaction 4 languages add topic