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Heterocyclic Chemistry
CHEMISTRY OF HETEROCYCLIC COMPOUNDS
Heterocyclic
Chemistry
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WHAT IS HETEROCYCLIC CHEMISTRY?
What are carbocyclic compounds?
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Carbocyclic Compound
Carboxylic Compound Carboxylic Compound
Aromatic Compound Cyclic Compound

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Whats aheterocyclic compound?
If the ring system is made up of carbon atoms and
at least one other element, the compound can be
classified as hetero cyclic. The elements that
are found most commonly together with carbon in a
ring system are Nitrogen (N), Oxygen(O), and
Sulfur(S).

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Heterocyclic Chemistry
Heterocyclic compounds are organic compounds
that contain a ring structure containing atoms in
addition to carbon, such as sulfur, oxygen or
nitrogen, as the heteroatom.
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Heterocyclic Chemistry
Heterocyclic classification
It can be classified into
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Heterocyclic Chemistry
Heterocyclic classification
1- Aliphatic heterocycles -
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Heterocyclic Chemistry
2- Aromatic heterocycles - a- six-membered
aromatic hetrocycles
Pyrimidine
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Heterocyclic Chemistry
2- Aromatic heterocycles -
b- five-membered aromatic hetrocycles
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Heterocyclic Chemistry
2- Aromatic heterocycles -
c- bicyclic heteroaromatic compounds
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Heterocyclic Chemistry

• Importantce and uses of Heterocyclic compounds-
• Biosynthesized
• Essential for life ( haem, chlorophyll)
• Their metabolitis used as
• - toxin towords off predators
• - colouring agents to attact mates
• In general various important compounds such as-
• alkaloids, vitamins, antibiotics, essential amino
  acids, hormones, drugs and dyes contain
  heterocyclic structure.

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Heterocyclic Chemistry
in general nucleic acids, amino acids
(proteins), feeding proteins, carbohydrates,
vitamins alkaloids nicotine,
caffeine Application antibiotics
(penicillins, sulfonamides) insecticides
(triazoles) herbicides (triazines, pyridines)
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Heterocyclic Chemistry
2/3 of all organic compounds are
heterocyclic compounds
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Heterocyclic Chemistry

• The main focus-
• Five-membered systems containing one heteroatom
• Six-membered system containing one heteroatom

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HETEROCYCLIC NOMENCLAUTURE