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Heterocyclic compounds (1)

1 Heterocyclic compounds (1)ByDr. GhassanQaisAliHeterocyclic compounds2 Introduction:Studentswillbefamiliarwithc arbocycliccompounds,suchascyclohexaneand benzene, , , ,sulfurornitrogen,butmanyotherelementsca nfunctioninthisway,includingboron, , ,manyheterocyclesretainthesenames;aselec tionofcommonfive-andsix-memberedheterocy clesthatcontainoneoxygen, Cycliccompoundshavingasringmembersatomso fatleasttwodifferentelements, ,1,2-thiazole. Any of a class of organic compounds whose molecules contain one or more rings of atoms with at least one atom (the heteroatom) being an element other than carbon, most frequently oxygen, nitrogen, or ,nucleicacids,thechemicalsubstancesthatc arrythegeneticinformationcontrollinginhe ritance,consistoflongchainsofheterocycli cunitsheldtogether)DNAiscomposedofhetero cyclicbases-pyrimidinesandpurines(.

Heterocyclic compounds 2 Introduction: Students will be familiar with carbocyclic compounds, such as cyclohexane and benzene, that are built from rings of carbon atoms. If one or more of the carbon atoms is replaced by another element, the product is a heterocycle.

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