Heterocyclics - Heterocycles Ring compounds with elements other than carbon in the ring The most common elements to appear in heterocyclic

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Heterocycles Ring compounds with elements other than carbon in the ring. The most common elements to appear in heterocyclic compounds are oxygen, nitrogen and sulfur. The aliphatic heterocycles are similar to the open chain analogues, ethers, amines and sulfides. The aromatic heterocycles are similar to other aromatic compounds.
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Heterocyclic Nomenclature Replacement nomenclature ( IUPAC recommended 1957) Oxygen oxa Sulfur thia Nitrogen aza Lowest number assigned to the hetero atom with the highest precedence: O > S > N S thiacyclobutane O NH 1-oxa-3-azacyclopentane
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Hantzsch-Widman (1888) Suffixes ring with nitrogen ring without nitrogen Ring members unsat’d sat’d unsat’d sat’d 3 -irine -iridine irene irine 4 ete etidine ete etane 5 ole olidine ole olane 6 ine perhydro__ine in ane 7 epine perhydro__epine epin epane
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O S N H * oxirane ethylene oxide oxacyclopropane * thiirane ethylene sulfide thiacyclopropane * aziridine ethylene imine azacyclopropane N N N O N H diazirane 1-azirine oxaziridine oxazacyclopropane You must know the * names
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S NH
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This note was uploaded on 10/01/2011 for the course CHEM 3332 taught by Professor Thummel during the Spring '08 term at University of Houston.

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Heterocyclics - Heterocycles Ring compounds with elements other than carbon in the ring The most common elements to appear in heterocyclic

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