Uniti nomenclature of heterocyclic compounds krishna teja. Nomenclature of heterocyclic compounds heterocyclic compound. It is worth noting that replacement of the pyrazole ring of 6 by a benzene has. The most systematic nomenclature of heterocycles is based on the names of carbocyclic. The replacement system of nomenclature is based on the premise that heterocyclic compounds are derived by replacing a carbon in carbocyclic compounds. The general method of naming organic ring and chain systems based on the hetero atom concept is known as replacement nomenclature.
The first proceeds by an electrophilic substitution of a nitrogenactivated. This document provides a unified treatment of heterocyclic and hydrocarbon polycyclic fused ring systems. This usually originates from the compounds occurrence, its first preparation or its special properties. The replacement nomenclature thus, aza, oxa, and thia are prefixes for a nitrogen ring atom, an oxygen ring atom, and a sulfur ring atom, respectively. Nomenclature of heterocyclic compounds free download as. In replacement nomenclature, the heterocycles name is composed of the. Devising a systematic nomenclature system for heterocyclic compounds presented a.
Heterocyclic derivatives, seen as a group, can be divided into two broad areas. Heterocyclic chemistry at a glance, second edition. Replacement nomenclature radicals cationic hetero atoms. There are three systems for naming heterocyclic compounds. Numbering is assigned so as to give locant 1 to the hetero atom listed earlier in table bi, next to hetero atoms as a complete set, and. This document provides a unified treatment of heterocyclic and hydrocarbon polycyclic fused ring systems with recommendations for the naming of complex examples not covered by the 1979 iupac rules.
In replacement nomenclature, the heterocycles name is composed of the carbocycles name and a prefix that denotes the heteroatom. Synthesis of heterocyclic compounds and its applications article pdf available in arabian journal of chemistry 28 july 2015 with 7,450 reads how we measure reads. In a polycyclic compound, a ring orthofused to different sides of two other rings that. Notes on naming some fused heterocycles wiley online library.
Bridged fused ring systems where replacement nomenclature is used. Cyclic compounds having as ring members atoms of at least two different elements, e. Therefore the rules of replacement nomenclature are similar to those applied for naming carbocyclic compounds. In addition, a recent monograph on general heterocyclic. Importance in nature and in the synthesis of pharmaceuticals, authorl.
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