The document discusses heterocyclic compounds, which are cyclic compounds containing at least one atom other than carbon in the ring, such as nitrogen, oxygen, sulfur, or phosphorus. These compounds include lactones, alkene oxides, cyclic anhydrides, alkaloids, proteins, and enzymes. The document covers the classification, nomenclature, methods of preparation, structure, and examples of heterocyclic compounds like furan, pyridine, and indole.

1. HETEROCYCLIC COMPOUNDS
Dr.Bincy Joseph
Assistant Professor
Dept. of chemistry
St. Mary's college
Thrissur

2. HETEROCYCLIC COMPOUNDS

3. HETEROCYCLIC COMPOUNDS
• Cyclic compounds having at least one
atom other than carbon in the ring –
Heterocyclic compounds
N,O,S,Se,P,B,As….
• Lactones, alkene oxides, cyclic anhydrides X
• Alkaloids, proteins, enzymes …..

4. Classification

9. Nomenclature
• Common name

10. Nomenclature…
• The suffix ‘ole’ → 5- membered
heterocycle
• ‘ ine ‘→ 6- membered heterocycle

12. FURAN,PYRIDINE,INDOLE

13. FURAN (C4H4O)

14. Methods of Preparation

16. Structure
• Resonance concept

17. Molecular orbital concept

18. Molecular orbital concept

19. Molecular orbital concept

20. THANK YOU